geeksprogrammings

Facebook getuser returning 0 Active access token required

noreply@blogger.com (Heemanshu Bhalla) — Thu, 30 Mar 2017 07:20:00 +0000

Facebook getuser returning 0 and An Active access token must be used to query information about the current user

If you are getting above error after March 25, 2017 then you may be using Facebook API version - 2.2. The reason of this error is facebook api version - 2.2 was only available until March 25,2017. That means you need to upgrade to Another updated version of facebook api. I prefer you to use Facebook API version 2.7 or version 2.8 as they are available until October 2018.

If you Use Facebook api version 2.3 it is only available until July 2017. Check below dates of all Facebook API versions -

Facebook API Version & Expiration Dates ( Image Source Facebook Api Documentation )

How to call a function before leaving page - Jquery beforeonunload

noreply@blogger.com (Heemanshu Bhalla) — Sun, 26 Mar 2017 16:14:00 +0000

Hi guys, Shraing Code Snippet for Calling a function before leaving page. It may be required for variety of purposes. you can use it to track statistics for user's leaving from a website page to record that page for bounce pages statistics from where user is leaving website mostly. this is just a simple example you can use it for variety of way.

you can share in comments for which purpose you may require this type of code functionality.

**Jquery Code Example -**

$(window).bind('beforeunload', function(){
Func_ToInsert_Record();
Alert('Thanks And Bye!');
});

**Javascript Code Example -**

// Anonymous function
window.onbeforeunload = function(event) {
var message = '';
if (window.event) {
console.log(window.event);
console.log(event.currentTarget.performance);
console.log(event.currentTarget.performance.navigation);
console.log(event.currentTarget.performance.navigation.type);

}

event = event || window.event;
event.preventDefault = true;
event.cancelBubble = true;
event.returnValue = message;
}

Difference Between Where and Having Clause

noreply@blogger.com (Heemanshu Bhalla) — Wed, 07 Dec 2016 12:38:00 +0000

The WHERE clause does not work with aggregates like SUM,Count etc.

The SQL above will not work, because the where clause doesn’t work with aggregates – like sum, avg, max, etc.. Instead, what we will need to use is the having clause. The having clause was added to sql just so we could compare aggregates to other values – just how the ‘where’ clause can be used with non-aggregates. Now, the correct sql will look like this:

Many time i have seen code where Having and where clause are misused see Examples Below -

BAD SQL:
select employee, sum(bonus) from emp_bonus
group by employee where sum(bonus) > 1000;

GOOD SQL:
select employee, sum(bonus) from emp_bonus
group by employee having sum(bonus) > 1000;

Difference between having and where clause

So we can see that the difference between the having and where clause in sql is that the where clause can not be used with aggregates, but the having clause can. One way to think of it is that the having clause is an additional filter to the where clause.

Sql Standard Theory says WHERE Clause restricts the result set before returning rows and HAVING restricts the result set after retrieving all records.That's why WHERE is faster as compared to Having and that's why having is not used more commonly or always as that of Having so it should used in circumstances where it is necessary to use having and nothing else is possible like as in case we are using aggregate functions

How To Redirect Non-www to www in Asp.net

noreply@blogger.com (Heemanshu Bhalla) — Tue, 06 Dec 2016 12:34:00 +0000

Please Follow Below Set of Steps to Redirect Non-www To www for your domain in asp.net or asp classic Web Application : -

1. Open web.config file of your Web Application
2. Before Closing of </system.webserver> Add below code in order to redirect your domain
from xyz.com to http://www.xyz.com for all pages of your website -

<system.webServer>
<rewrite>
<rules>
<rule name="Redirect domain.com to www" patternSyntax="ECMAScript" stopProcessing="true">
<match url=".*" />
<conditions>
<add input="{HTTP_HOST}" pattern="^xyz.com$" />
</conditions>
<action type="Redirect" url="http://www.xyz.com/{R:0}" />
</rule>
</rules>
</rewrite>
</system.webServer>

3. Save web.config file and Upload it to Hosting Server
4. Now every request to xy.com will be rewritten with http://www.xyz.com

Difference Between System.Web and System.WebServer

noreply@blogger.com (Heemanshu Bhalla) — Tue, 06 Dec 2016 12:24:00 +0000

System.web is the settings section for IIS6 and the built in cassini server (the test server in Visual Studio 2010 and before where you are targeting asp.net 3.5 or lower)

The system.webserver is a child of the configuration section that means in web.config file <system.webserver> tag is placed under
<configuration> Tag.

System.WebServer Tag is contained in web.config file in root directory of website. This file contains configuration that needs to be implemented on IIS for Current project. Configuration coded in <system.webserver> Tag are implemented on IIS and are only applied to Project or Webapplication to which corresponding web.config Belongs. This Tag Can Exist is one of below formats in your project's web.config file in root directory of Web Application.

Empty <system.webserver> Tag Under <configuration> Tag -

<configuration>
<system.webServer>
</system.webServer>
</configuration>

The system.web section is used in web.config file of Asp.net WebApplications for defining Server Configuration that are applicable for IIS 6, while the system.webserver version is used to configure IIS 7.0. IIS 7.0 includes a new ASP.NET pipeline and some configuration differences. you can check complete details on link below -

https://msdn.microsoft.com/en-us/library/bb763179.aspx

System.webserver is the Server Configuration section for IIS 7 and above, and the build in IIS Express server which is used in Visual Studio 2010 targeting asp.net 4 and any newer versions that are released in the future.

Sample of Web.config file Contains Both <system.web> and <system.webserver>

<?xml version="1.0"?>

<configuration>
<appSettings>
<add key="username" value="admin-heemanshu@564496"/>
<add key="password" value="@htennty50!334#"/>
</appSettings>

<connectionStrings/>

<system.web>

<compilation debug="true" strict="false" explicit="true"/>
<pages>
<namespaces>
<clear/>
<add namespace="System"/>
<add namespace="System.Collections"/>
<add namespace="System.Collections.Specialized"/>
<add namespace="System.Configuration"/>
<add namespace="System.Text"/>
<add namespace="System.Text.RegularExpressions"/>
<add namespace="System.Web"/>
<add namespace="System.Web.Caching"/>
<add namespace="System.Web.SessionState"/>
<add namespace="System.Web.Security"/>
<add namespace="System.Web.Profile"/>
<add namespace="System.Web.UI"/>
<add namespace="System.Web.UI.WebControls"/>
<add namespace="System.Web.UI.WebControls.WebParts"/>
<add namespace="System.Web.UI.HtmlControls"/>
</namespaces>
</pages>



<authentication mode="Windows"/>


<customErrors mode="Off" defaultRedirect="GenericErrorPage.htm">
<error statusCode="404" redirect="FileNotFound.htm"/>
</customErrors>
</system.web>

<system.webServer>
<rewrite>
<rules>
<rule name="Redirect" patternSyntax="ECMAScript" stopProcessing="true">
<match url=".*" />
<conditions>
<add input="{HTTP_HOST}" pattern="^xyz.com$" />
</conditions>
<action type="Redirect" url="http://www.xyz.com/{R:0}" />
</rule>
</rules>
</rewrite>
</system.webServer>

</configuration>

what are CTE? When and Why To Use CTE in SQL ?

noreply@blogger.com (Heemanshu Bhalla) — Thu, 17 Nov 2016 13:03:00 +0000

What are CTE in SQL ?

CTE are Common Table Expressions first introduced in Sql Server 2005. It is basically a result set or result holder or separate plugin / extension that can hold some complex query separately from main query and supply the named result set or result holder name in place of that complex query in main query.

It really improves complexity of complex queries. It is specially used in queries that contains complex sub-queries in them. Using them makes our query more concise, improves readability of query and makes it easy for maintainable for long time for future use.

CTE always start with Semicolon preceeded by 'with' keyword and CTE are temporary result holders and are removed form memory after query executed its life is only during query is executing.

When To Use CTE

CTE is helpful to be used in Below two Conditions -

In order to reduce complexity of query with complex subqueries that will make code easy to read and maintain.
Very helpful to create Recursive query if required in some cases.

you can read more about recursive queries with CTE on link below -
Read More About How To Use Recursive Query With CTE

Why We use ; ( Semicolon ) in start of CTE

It is actually to ensure previous statement before with / CTE are terminated. Most of times
we use semicolon before with keyword in CTE as we don't know what is before CTE.

Example - Without semicolon may create problem in below code in some StoredProcedure

DECLARE @foo int
WITH OrderedOrders AS
(
SELECT SalesOrderID, OrderDate from Orders;
)

Above query will create error in Stored Procedure as DECLARE @foo int is not ended with
semicolon and CTE's with keyword is not ended with ; ( Semicolon ). Better way will to write this query in stored procedure or anywhere is below -

DECLARE @foo int
;WITH OrderedOrders AS
(
SELECT SalesOrderID, OrderDate from Orders;
)

Now in this case semicolon before WITH Keyword will terminate previous statement first and then execute CTE

Table Valued Functions in Sql

noreply@blogger.com (Heemanshu Bhalla) — Thu, 17 Nov 2016 11:34:00 +0000

What are Table Valued Functions in Sql ?

There are two types of “User Defined” fucntions in sql server

scalar function ( that returns single value in response to function call )

2. inline table valued ( that returns function result in tabulated form but query can single lined e.g.

3. return (select * from table_name).

1. Inline Table Valued Functions
If function is made to execute a select query with or without parameters and return result as table type it comes in category of Inline table valued functions.

Sql Code Example -

CREATE FUNCTION GetAuthorsByState( @state char(2) )
RETURNS table AS
RETURN (SELECT au_fname, au_lname FROM Authors WHERE state=@state)
GO

2. Multi-statement table valued Functions
Multi-statement table valued that returns function result in tabulated form but query may have multiple statements that can make changes to query and return the tabulated data.

If functions is made to execute multiple sql statements including insert, update statements etc and return result as table type then it comes in category of Multistatement table valued functions

Example

CREATE FUNCTION GetAuthorsByState( @state char(2) )
RETURNS
@AuthorsByState table (
au_id Varchar(11),
au_fname Varchar(20)
)
AS
BEGIN
INSERT INTO @AuthorsByState
SELECT au_id,au_fname FROM Authors WHERE state = @state
IF @@ROWCOUNT = 0
BEGIN
INSERT INTO @AuthorsByState VALUES ('','No Authors Found')
END
RETURN
END
GO

Google Joined .NET Foundation

noreply@blogger.com (Heemanshu Bhalla) — Thu, 17 Nov 2016 06:37:00 +0000

Its great news by microsoft that google joined .net foundation. Recently Samsung also joined .Net foundation for Tizen platform. Apart from everything its great that all tech companies are working collectively to make good environment for innovation.

This Move of Big companies also gives inspiration to many developers working in different technologies to come and work together in a team. They have shown an example of working in a team that will empower and motivate many others in future and present.

Google is now a member of the .NET Foundation, where it joins the likes of Red Hat, Unity, Samsung Jet-brains and (of course) Microsoft in the Technical Steering Group.

Google already allows developers on its Cloud Platform to deploy .NET applications

Samsung, too, is deepening its commitment to .NET by launching support for it on its Tizen platform. As Samsung’s Hong-Seok Kim told me, Samsung was looking for a framework in addition to the web framework and C API that Tizen developers currently use to write their applications.

SQL Server Public Preview available on Ubuntu

noreply@blogger.com (Heemanshu Bhalla) — Thu, 17 Nov 2016 06:30:00 +0000

Microsoft has just announced its public preview of the next release of SQL Server, and Canonical is delighted to announce that this preview is available for Ubuntu.

Moreover, with SQL Server on Ubuntu, there are significant cost savings, performance improvements, and the ability to scale & deploy additional storage and compute resources easier without adding more hardware.

Read Complete Details Here -

Full Article details Sql Server Public Preview Available on Ubuntu

Download Sql Server on Linux

Visual studio for mac is released

noreply@blogger.com (Heemanshu Bhalla) — Thu, 17 Nov 2016 06:27:00 +0000

Very Nice Move from microsoft and cheers for Mac Users. Microsoft launched Visual studio preview for Mac .you can enjoy using dotnet development on mac platform now. Microsoft released Visual Studio for Mac it is currently in preview and still work is in progress for several tools. check download link below -

Download Visual Studio Preview For Mac

No assembly found containing an OwinStartupAttribute

noreply@blogger.com (Heemanshu Bhalla) — Wed, 09 Nov 2016 07:00:00 +0000

The Common scenario that one of student got was during creating signalr project from empty web project. so i would like to spread it online with others. you may have see Error Screen as shown in below Screenshots -

Error : No assembly found containing an OwinStartupAttribute.
No assembly found containing a Startup or [AssemblyName].Starup class.

No Assembly found containing an OwinStartupAttribute Error

Solution For error : Simple straightforward solution is to Add Below code ( as shown in below screenshot ) in web.config under <configuration> tag as shown in image below. you error will be
gone

line of Code to Add is written below and also shown written in Screenshot below

<appSettings>
<add key="owin:AutomaticAppStartup" value="false" />
</appSettings>

₹500 and ₹100 Notes Banned In India : 25 Points You need to know

noreply@blogger.com (Heemanshu Bhalla) — Wed, 09 Nov 2016 05:59:00 +0000

NDA Government has implemented smart move as slap to Black Money holders. Money of Black Money Holders will be of no cost if they kept it in their safe lockers. GPS chip based notes will be out in market soon and old notes must need to be deposited in banks as announced by Government of India. Black money holders must need to take their money out in banks otherwise they will be of now use.

A Smart move By Government of India to out take thousands of crores of money from Black Money Holders in banks and charge them Taxes.

1) Why is this scheme?
The incidence of fake Indian currency notes in higher denomination has increased. For ordinary persons, the fake notes look similar to genuine notes, even though no security feature has been copied. The fake notes are used for antinational and illegal activities. High denomination notes have been misused by terrorists and for hoarding black money. India remains a cash based economy hence the circulation of Fake Indian Currency Notes continues to be a menace. In order to contain the rising incidence of fake notes and black money, the scheme to withdraw has been introduced.

2) What is this scheme?

The legal tender character of the notes in denominations of ₹ 500 and ₹ 1000 stands withdrawn. In consequence thereof withdrawn old high denomination (OHD) notes cannot be used for transacting business and/or store of value for future usage. The OHD notes can be exchanged for value at any of the 19 offices of the Reserve Bank of India or at any of the bank branches or at any Head Post Office or Sub-Post Office.

3) How much value will I get?

You will get value for the entire volume of notes tendered at the bank branches / RBI offices.

4) Can I get all in cash?

No. You will get upto ₹4000 per person in cash irrespective of the size of tender and anything over and above that will be receivable by way of credit to bank account.

5) Why I cannot get the entire amount in cash when I have surrendered everything in cash?

The Scheme of withdrawal of old high denomination(OHD) notes does not provide for it, given its objectives.

6) ₹4000 cash is insufficient for my need. What to do?

You can use balances in bank accounts to pay for other requirements by cheque or through electronic means of payments such as Internet banking, mobile wallets, IMPS, credit/debit cards etc.

7) What if I don’t have any bank account?

You can always open a bank account by approaching a bank branch with necessary documents required for fulfilling the KYC requirements.

8) What if, if I have only JDY account?

A JDY account holder can avail the exchange facility subject to the caps and other laid down limits in accord with norms and procedures.

9) Where can I go to exchange the notes?

The exchange facility is available at all Issue Offices of RBI and branches of commercial banks/RRBS/UCBs/State Co-op banks or at any Head Post Office or Sub-Post Office.

10) Need I go to my bank branch only?

For exchange upto 4000 in cash you may go to any bank branch with valid identity proof. For exchange over 4000, which will be accorded through credit to Bank account only, you may go to the branch where you have an account or to any other branch of the same bank.

In case you want to go to a branch of any other bank where you are not maintaining an account, you will have to furnish valid identity proof and bank account details required for electronic fund transfer to your account.

11) Can I go to any branch of my bank?

Yes you can go to any branch of your bank.

12) Can I go to any branch of any other bank?

Yes, you can go to any branch of any other bank. In that case you have to furnish valid identity proof for exchange in cash; both valid identity proof and bank account details will be required for electronic fund transfer in case the amount to be exchanged exceeds ₹4000.

13) I have no account but my relative / friend has an account, can I get my notes exchanged into that account?

Yes, you can do that if the account holder relative/friend etc gives you permission in writing. While exchanging, you should provide to the bank, evidence of permission given by the account holder and your valid identity proof.

14) Should I go to bank personally or can I send the notes through my representative?

Personal visit to the branch is preferable. In case it is not possible for you to visit the branch you may send your representative with an express mandate i.e. a written authorisation. The representative should produce authority letter and his / her valid identity proof while tendering the notes.

15) Can I withdraw from ATM?

It may take a while for the banks to recalibrate their ATMs. Once the ATMs are functional, you can withdraw from ATMs upto a maximum of ₹2,000/- per card per day upto 18th November, 2016. The limit will be raised to ₹4000/- per day per card from 19th November 2016 onwards.

16) Can I withdraw cash against cheque?

Yes, you can withdraw cash against withdrawal slip or cheque subject to ceiling of ₹10,000/- in a day within an overall limit of ₹20,000/- in a week (including withdrawals from ATMs) for the first fortnight i.e. upto 24th November 2016.

17) Can I deposit withdrawn notes through ATMs, Cash Deposit Machine or cash Recycler?

Yes, OHD notes can be deposited in Cash Deposits machines / Cash Recyclers.

18) Can I make use of electronic (NEFT/RTGS /IMPS/ Internet Banking / Mobile banking etc.) mode?

You can use NEFT/RTGS/IMPS/Internet Banking/Mobile Banking or any other electronic/ non-cash mode of payment.

19) How much time do I have to exchange the notes?

The scheme closes on 30th December 2016. The OHD banknotes can be exchanged at branches of commercial banks, Regional Rural Banks, Urban Cooperative banks, State Cooperative Banks and RBI till 30th December 2016.

For those who are unable to exchange their Old High Denomination Banknotes on or before December 30, 2016, an opportunity will be given to them to do so at specified offices of the RBI, along with necessary documentation as may be specified by the Reserve Bank of India.

20) I am right now not in India, what should I do?

If you have OHD banknotes in India, you may authorise in writing enabling another person in India to deposit the notes into your bank account. The person so authorised has to come to the bank branch with the OHD banknotes, the authority letter given by you and a valid identity proof (Valid Identity proof is any of the following: Aadhaar Card, Driving License, Voter ID Card, Pass Port, NREGA Card, PAN Card, Identity Card Issued by Government Department, Public Sector Unit to its Staff)

21) I am an NRI and hold NRO account, can the exchange value be deposited in my account?

Yes, you can deposit the OHD banknotes to your NRO account.

22) I am a foreign tourist, I have these notes. What should I do?

You can purchase foreign exchange equivalent to ₹5000 using these OHD notes at airport exchange counters within 72 hours after the notification, provided you present proof of purchasing the OHD notes.

23) I have emergency needs of cash (hospitalisation, travel, life saving medicines) then what I should do?

You can use the OHD notes for paying for your hospitalisation charges at government hospitals, for purchasing bus tickets at government bus stands for travel by state government or state PSU buses, train tickets at railway stations, and air tickets at airports, within 72 hours after the notification.

24) What is proof of identity?

Valid Identity proof is any of the following: Aadhaar Card, Driving License, Voter ID Card, Pass Port, NREGA Card, PAN Card, Identity Card Issued by Government Department, Public Sector Unit to its Staff.

25) Where can I get more information on this scheme?

Further information is available at our website (www.rbi.org.in) and GoI website (www.rbi.org.in).

What are Instead of Triggers

noreply@blogger.com (Heemanshu Bhalla) — Wed, 02 Nov 2016 06:36:00 +0000

Instead of triggers are used to reverse the default action of the query same as the word ‘insted of’ denotes. For example if we are going to execute query to delete record in Empoyee table and we want to first check whether id of employee passed Exist in database or not then we can place a “Insted of Trigger” in database on Delete Operation for that particular table and we will place code in trigger to first check whether employee with specified id exist in db . IF yes then delete that employe , otherwise abort the query execution.

In general language we use instead of triggers when we need to code - instead of doing xyz do abc . means we need to trigger the selection of operations in db depending on Values in database tables or other certain criteria.

INSTEAD OF TRIGGERS can be classified further into three types as:

INSTEAD OF INSERT Trigger.
INSTEAD OF UPDATE Trigger.
INSTEAD OF DELETE Trigger.

EXAMPLE
Below trigger will prevent the deletion of records from the table where Emp_Sal > 1200. If such a record is deleted, the Instead Of Trigger will rollback the transaction, otherwise the transaction will be committed.

CREATE TRIGGER trgInsteadOfDelete ON [dbo].[Employee_Test] 
INSTEAD OF DELETE
AS
 declare @emp_id int;
 declare @emp_name varchar(100);
 declare @emp_sal int;
 
 select @emp_id=d.Emp_ID from deleted d;
 select @emp_name=d.Emp_Name from deleted d;
 select @emp_sal=d.Emp_Sal from deleted d;

 BEGIN
  if(@emp_sal>1200)
  begin
   RAISERROR('Cannot delete where salary > 1200',16,1);
   ROLLBACK;
  end
  else
  begin
   delete from Employee_Test where Emp_ID=@emp_id;
   COMMIT;
   insert into Employee_Test_Audit(Emp_ID,Emp_Name,Emp_Sal,Audit_Action,Audit_Timestamp)
   values(@emp_id,@emp_name,@emp_sal,'Deleted -- Instead Of Delete Trigger.',getdate());
   PRINT 'Record Deleted -- Instead Of Delete Trigger.'
  end
 END
GO

Webhooks Vs WebSockets

noreply@blogger.com (Heemanshu Bhalla) — Thu, 06 Oct 2016 11:36:00 +0000

WebSockets Can be used to exchange event notifications but it requires a constact network connection . Signalr is best example of Websockets that can be used within an Asp.net application

Whereas WebHooks are for event notification across other web applications and other external services. It is similar to b2b communication.

Example
You can receive a WebHook when someone sends you money to your PayPal account. PayPal fires off a POST request to your predefined URL handler and then your app does something with that notification. You pre-configure everything on the PayPal side first. You also set up an application to handle the incoming POST request. The event notification is "pushed" to you in (near) real-time. No need to hold open a network connection while waiting for events.

The two can be complementary. For example, when you receive the WebHook from PayPal, you can notify a logged in user on your webapp (using SignalR/WebSockets) that money has been received successfully.

We Will Be Updating Articles With More Information Soon .....

What are Webhooks and Webhooks vs WebAPI ?

noreply@blogger.com (Heemanshu Bhalla) — Thu, 06 Oct 2016 08:49:00 +0000

If you ever used API’s then you know they follow request - response mechanism . Every Request is followed by a Relevant API Response

Example 1 - if we need to fetch our emails we will make a Reques to API with required credentials like Emailid, MessageCount and userid and API will give our Emails in Response to Source From where Request Came

Whereas As Webhooks works little different Sometime they are Called as 'Reverse APIs' Webhooks Skips this request part there is no need to give any request to them they are set to give you response data without knocking them

Best example will be Notification System Used by several Applications Like - Twilio, Dropbox for Giving Notifications to your System
Webhooks don’t require a request to be sent to give response they are set and programmed to provide details , messages , Notifications whenever available

Example 2
You can receive a WebHook when someone sends you money to your PayPal account. PayPal fires off a POST request to your predefined URL handler and then your app does something with that notification. You pre-configure everything on the PayPal side first. You also set up an application to handle the incoming POST request. The event notification is "pushed" to you in (near) real-time. No need to hold open a network connection while waiting for events.

For Using webhook, you need to register with the company providing the service by providing URL that will be your website url. That URL is a place in your application that will receive the data from that webhooks such notification messages and do something with it such as saving them to db and notifying to user . In some cases, you can tell the provider the situations when you’d like to receive data. Whenever there’s something new, the webhook will send it to your URL.

we will continue to Adding More details to Post Soon ....

What are Webhooks and Webhooks vs WebAPI ?

noreply@blogger.com (Heemanshu Bhalla) — Thu, 06 Oct 2016 08:49:00 +0000

If you ever used API’s then you know they follow request - response mechanism . Every Request is followed by a Relevant API Response

Example 1 - if we need to fetch our emails we will make a Reques to API with required credentials like Emailid, MessageCount and userid and API will give our Emails in Response to Source From where Request Came

Whereas As Webhooks works little different Sometime they are Called as 'Reverse APIs' Webhooks Skips this request part there is no need to give any request to them they are set to give you response data without knocking them

Best example will be Notification System Used by several Applications Like - Twilio, Dropbox for Giving Notifications to your System
Webhooks don’t require a request to be sent to give response they are set and programmed to provide details , messages , Notifications whenever available

Example 2
You can receive a WebHook when someone sends you money to your PayPal account. PayPal fires off a POST request to your predefined URL handler and then your app does something with that notification. You pre-configure everything on the PayPal side first. You also set up an application to handle the incoming POST request. The event notification is "pushed" to you in (near) real-time. No need to hold open a network connection while waiting for events.

For Using webhook, you need to register with the company providing the service by providing URL that will be your website url. That URL is a place in your application that will receive the data from that webhooks such notification messages and do something with it such as saving them to db and notifying to user . In some cases, you can tell the provider the situations when you’d like to receive data. Whenever there’s something new, the webhook will send it to your URL.

I will continue to Adding More details to Post Soon ....

Gitless version control system

noreply@blogger.com (Heemanshu Bhalla) — Tue, 04 Oct 2016 23:02:00 +0000

Gitless is an experimental version control system built on top of Git. Many people complain that Git is hard to use. We think the problem lies deeper than the user interface, in the concepts underlying Git. Gitless is an experiment to see what happens if you put a simple veneer on an app that changes the underlying concepts. Because Gitless is implemented on top of Git (could be considered what Git pros call a "porcelain" of Git), you can always fall back on Git. And of course your coworkers you share a repo with need never know that you're not a Git aficionado.

Gitless Set of Commands

gl init - create an empty repo or create one from an existing remote repo
gl status - show status of the repo
gl track - start tracking changes to files
gl untrack - stop tracking changes to files
gl diff - show changes to files
gl commit - record changes in the local repo
gl checkout - checkout committed versions of files
gl history - show commit history
gl branch - list, create, edit or delete branches
gl switch - switch branches
gl tag - list, create, or delete tags
gl merge - merge the divergent changes of one branch onto another
gl fuse - fuse the divergent changes of one branch onto another
gl resolve - mark files with conflicts as resolved
gl publish - publish commits upstream
gl remote - list, create, edit or delete remote

Creating a Repository

Say you are in directory foo and you want turn it into a repository. You do this with thegl init command. This transforms the current working directory into an empty repository and you are now ready to start saving changes to files in foo:

$ mkdir foo
$ cd foo/
$ gl init
✔ Local repo created in /MyFiles/foo

In most cases there's already some existing repository you want to work on instead of starting with an empty repository. To make a local clone of a remote repository you can pass the URL of the repository as input to the same gl init command:

$ mkdir experiment $ cd experiment/ $ gl init https://github.com/spderosso/experiment ✔ Local repo created in /MyFiles/foo ✔ Initialized from remote https://github.com/spderosso/experiment

Complete Documentation Guidehttp://gitless.com/#documentation

Gitless Vs Githttp://gitless.com/#vs

Git Cheatsheet

noreply@blogger.com (Heemanshu Bhalla) — Tue, 04 Oct 2016 22:45:00 +0000

Git is the open source distributed version control system that allows to perform GitHub activities on your desktop. This cheat sheet summarizes commonly used Git command line instructions for quick reference.

Git cheat list

list last 20 hashes in reverse

git log -n 20 --reverse --format="%h %ae %s" --abbrev-commit

try a new output for diffing

git diff --compaction-heuristic ...
         --color-words ...

enable more thorough comparison

git config --global diff.algorithm patience

restoring a file from a certain commit relative to the latest
```
git checkout HEAD~<NUMBER> -- <RELATIVE_PATH_TO_FILE>
```
restoring a file from a certain commit relative to the given commit
```
git checkout <COMMIT_HASH>~<NUMBER> -- <RELATIVE_PATH_TO_FILE>
```

restoring a file from a certain commit

git checkout <COMMIT_HASH> -- <RELATIVE_PATH_TO_FILE>

creating a diff file from unstaged changes for a specific folder
```
git diff -- <RELATIVE_PATH_TO_FOLDER> changes.diff
```
applying a diff file
- go to the root directory of your repository
- run: git apply changes.diff
show differences between last commit and currrent changes:
```
git difftool -d
```
referring to:
- last commits ... HEAD~1 ...
- last 3 commits ... HEAD~3 ...

show the history of changes of a file

git log -p -- ./Scripts/Libs/select2.js

ignoring whitespaces

git rebase --ignore-whitespace <BRANCH_NAME>

pulling for fast-forward only (eliminating a chance for unintended merging)
```
git pull --ff-only
```
list of all tags
```
git fetch
git tag -l
```

archive a branch using tags

git tag <TAG_NAME> <BRANCH_NAME>
git push origin --tags

you can delete your branch now

get a tagged branch

git checkout -b <BRANCH_NAME> <TAG_NAME>

list of all branches that haven't been merged to master
```
git branch --no-merge master
```
enable more elaborate diff algorithm by default
```
git config --global diff.algorithm histogram
```
list of all developers
```
git shortlog -s -n -e
```

display graph of branches

git log --decorate --graph --all --date=relative

git log --decorate --graph --all --oneline

remembering the password
```
git config --global credential.helper store
git fetch
```
the first command tells git to remember the credentials that you are going to provide for the second command
path to the global config
```
C:\Users\Bykov\.gitconfig
```

example of a global config

[user]
   email = *****
   name = Aleksey Bykov
   password = *****
[merge]
   tool = p4merge
[mergetool "p4merge"]
   cmd = p4merge.exe \"$BASE\" \"$LOCAL\" \"$REMOTE\" \"$MERGED\"
   path = \"C:/Program Files/Perforce\"
   trustExitCode = false
[push]
   default = simple
[diff]
   tool = meld
   compactionHeuristic = true
[difftool "p4merge"]
   cmd = p4merge.exe \"$LOCAL\" \"$REMOTE\"
   path = C:/Program Files/Perforce/p4merge.exe
[difftool "meld"]
   cmd = \"C:/Program Files (x86)/Meld/Meld.exe\" \"$LOCAL\" \"$REMOTE\"
   path = C:/Program Files (x86)/Meld/Meld.exe

viewing differences between current and other branch
```
git difftool -d BRANCH_NAME
```
viewing differences between current and stash
```
git difftool -d stash
```
viewing differences between several commits in a diff tool
```
git difftool -d HEAD@{2}...HEAD@{0}
```
view all global settings
```
git config --global -l
```

delete tag

git tag -d my-tag
git push origin :refs/tags/my-tag

pushing tags
```
git push --tags
```
checking the history of a file or a folder
```
git log -- <FILE_OR_FOLDER>
```
disabling the scroller
```
git --no-pager <...>
```

who pushed last which branch

git for-each-ref --format="%(committerdate) %09 %(refname) %09 %(authorname)"

deleting remote branch
```
git push origin :<BRANCH_NAME>
```

deleting remote branch localy

git branch -r -D <BRANCH_NAME>

or to sync with the remote

git fetch --all --prune

deleting local branch
```
git branch -d <BRANCH_NAME>
```
list actual remote branchs
```
git ls-remote --heads origin
```
list all remote (fetched) branches
```
git branch -r
```
list all local branches
```
git branch -l
```
find to which branch a given commit belongs
```
git branch --contains <COMMIT>
```

updating from a forked repository

git remote add upstream https://github.com/Microsoft/TypeScript.git
git fetch upstream
git rebase upstream/master

References :

https://services.github.com/kit/downloads/github-git-cheat-sheet.pdf

SOLID Principles

noreply@blogger.com (Heemanshu Bhalla) — Sun, 18 Sep 2016 15:47:00 +0000

SOLID Principles are set of rules that Help us to write Better quality of code . By Better quality of code I mean Code that can talk , Code that is extensible , Code that is loosely coupled , Code that is abstract and secure .

SOLID Principles guide us how we should design our Software / Web Applications . Most of the Unsuccessful Software lack SOLID Principles , How you design / Architecture your Software Defines the Healthy Life Span of your software . If Developers Don't Follow Good Principles Like SOLID etc while coding Software that makes Base of Software week and that kind of Software Surely lacks in Providing High Performance , High Scalability etc .

Why We Need SOLID Principles ?

If you have ever suffered from Software Performing slow , lagging while operating it . Its a bug in their Software Architecture Design . Its does not matter or you may not know / experience any problem while designing low scalable system for small traffic website but when software usage is increased site needs to be more scalable in that case your code architecture will be tested and It is the case when Design Pattern , Code Architectures and SOLID Principles came into existence

When Do We Need SOLID Principles ?

I am not saying you should only use SOLID Principles and other Design Patterns and Principles only in large Scale Project .I am just saying their power , performance , scalability came Make Tangible Effect in Large Scale Projects .

MAKE SOLID Principles YOUR HABIT

Real World Example Why we need SOLID

I love to connect code principles with real world examples that better way to understand them . Real world example for SOLID could be -

Let say we all have good way of eating , sitting , wearing clothes , behaving with others , respecting others and we all follow our own made these principles both in home , office everywhere so All in All we have made our these rules Our HABITS . that's the thing i wish to say you why adopting these principles is good it is because they will improve our Code pattern and will eventually make our code quality better .

There is no definite tutorial to make code quality better you can only improve by improving your code habits .

SOLID Consist of 5 Principles :-

1. Single Responsibility Principle ( SIP )

2. Open closed principle ( OCP )

3. Liskov substitution principle ( LSP )

4. Interface segregation principle ( ISP )

4. Dependency injection principle ( DIP )

We will be Covering Each SOLID Principle One By One . In that way you will get proper time to reaad blog article and understand it . If you have any question or confusion feel free to comment below . We will start First Principle of SOLID S - SIGNGLE RESPONSIBLITY PRINCIPLE in next post .

Feel Free to Share geeksprogrammings with others .

Medical ATM's In India

noreply@blogger.com (Heemanshu Bhalla) — Sun, 28 Aug 2016 19:15:00 +0000

Yes, You heard it right 'Medical ATM' . Similar to ATM Machines To Withdraw money Pilot Project for 1 year is launched in India in which Government has provided ATM's to Withdraw their medicines . You will be surprised & having number of questions in your mind regarding what facility will be provided and how ?

Medical ATM Will Connect Patients To Online-Doctor Who Will Register the Patient and Advice the Machine to Dispense Right Medicine

Major Question in your mind could be Who Will Give Prescription ? Yes , so Under this Project Whenever you visit a doctor you will be get a printed Bill With a Bar Code on it and yes that bar code will contain all information about you prescribed medicines It will act like a Medical Card your all your Health Info and you just need to Show Bar Code on your Medical Slip in front of Bar Code Scanner on ATM then ATM will push our your prescribed medicines to you after collecting money from you .

Isn't this wonderful . Yes , Definitely . Five ATMs have been lauched in four states of India — MP, Himachal Pradesh, Odisha and Andhra Pradesh — under Health Ministry pilot Project .

India currently has 0.51 doctors per 1,000 population, half the 1:1,000 ratio recommended by World Health Organization. Rural India’s ratio is 0.63 per 10,000. This project is lauched due to massive shortage of doctors in the Country to help some people and fullfill the shortage of doctors on required Locations and Situations .

From call centres, doctors will evaluate the condition of the patient — and if needed they will talk to Patients — and decide whether the person needs to be referred to a Clinic where doctor is available . In the latter case, a prescription will be generated and a command given automatically to the ATM to dispense only the drug prescribed, and no other. The MPHW will explain the dosage to the patient. And in case urgent referral is required, the 108 ambulance service will be made available at the sub-centre.

Every ATM will be managed by multipurpose public health worker (MPHW) or an auxiliary nurse midwife (ANM) armed with a multi-parameter patient vital monitor and other devices required for checking basic health parameters After successfull registeration of Patient these indicators would be transmitted to a medical call centre through a GSM-based monitor. In Beginning basic health parameters such as temperature, blood pressure, blood glucose and blood haemoglobin will be checked and the data instantly transmitted.

Javascript Event Propagation vs Event PreventDefault

noreply@blogger.com (Heemanshu Bhalla) — Sat, 27 Aug 2016 08:41:00 +0000

Event Propagation vs Event PreventDefault

Event Propagation

Event Propagation Stops the Event from bubbling or making the event Chain .

Example : - A Click Event on a <td> tag will also fire click event on it's parent <tr> and this event chain also continues to parent <table> tag of that <tr> this makes a event chain in order to stop this event Chain propagation we can Use StopPropagation that Prevents this from happening.

StopPropagation ( ) will stop that event from happening on parent (the entire ancestors). When We Use StopPropagation only < td > Event will fire as per our Example above its parent < tr > or < table > Click event will not fire .

StopPropagation ( ) Tells downward propagation of the event is stopped and also its upward propagation

Event PreventDefault

Event PreventDefault () Prevents the Default Browser Action In Response the Event Triggered . The preventDefault method prevents an event from carrying out its default functionality

Example : If we want to Stop Form Submit on click of Submit Button in form we can use PreventDefault to stop the default form submit behaviour of submit button in form .

As its name tells it just prevent occurence of the default behavior of event like if you need to prevent the click to occur on click event or stop entering of symbols in textbox if its character then make a check it entered character is symbol on keypress press and execute preventdefault ( ) to prevent default behavior of execution of event on keypress and nothing will enter in textbox if its symbol .

CODE EXAMPLE For StopPropagation

<div onclick='executeParent()'>
<a href='http://google.com'>Click here to visit google.com</a>
</div>
<script>
$('a').click(function(event) {
event.stopPropagation();
$('a').text('Click event is going to be executed');
$('a').contents().unwrap();
});
function executeParent() {
alert('here');
}
</script>

CODE EXPLANATION For StopPropagation

If you execute the code above, the function executeParent() will not be called and you will not get the javascript alert this time. This is due to us having prevented the propagation to the parent div using event.stopPropagation() method. Next you will see the hyperlink ‘Click here to visit google.com‘ replaced by the text ‘Click event is going to be executed‘ and immediately you will be redirected to google.com. This is because we haven’t prevented the default click action from triggering this time using event.preventDefault() method.

CODE EXAMPLE For PreventDefault

<div onclick='executeParent()'>
<a href='http://google.com'>Click here to visit google.com</a>
</div>
<script>
$('a').click(function(event) {
event.preventDefault();
event.stopPropagation();
$('a').text('Click event prevented');
$('a').contents().unwrap();
});
function executeParent() {
alert('here');
}
</script>

CODE EXPLANTION For PreventDefauls

If you execute the code above, the function executeParent() will not be called and you will not get the javascript alert. This is due to us having prevented the propagation to the parent div using event.stopPropagation() method. Next you will see the hyperlink ‘Click here to visit google.com‘ replaced by the text ‘Click event prevented‘ and you will not be redirected to google.com. This is because we have prevented the default click action from triggering this time using event.preventDefault() method.

Javascript Event StopPropagation

noreply@blogger.com (Heemanshu Bhalla) — Sat, 27 Aug 2016 08:39:00 +0000

Event Propagation

Event Propagation Stops the Event from bubbling or making the event Chain .

StopPropagation ( ) Tells downward propagation of the event is stopped and also its upward propagation

CODE EXAMPLE

<div onclick='executeParent()'> <a href='http://google.com'>Click here to visit google.com</a> </div> <script> $('a').click(function(event) { event.stopPropagation(); $('a').text('Click event is going to be executed'); $('a').contents().unwrap(); }); function executeParent() { alert('here'); } </script>

CODE EXPLANATION

Event Prevent Default in Javascript

noreply@blogger.com (Heemanshu Bhalla) — Sat, 27 Aug 2016 08:33:00 +0000

Event PreventDefault

CODE EXAMPLE

<div onclick='executeParent()'>
<a href='http://google.com'>Click here to visit google.com</a>
</div>
<script>
$('a').click(function(event) {
event.preventDefault();
event.stopPropagation();
$('a').text('Click event prevented');
$('a').contents().unwrap();
});
function executeParent() {
alert('here');
}
</script>

CODE EXPLANTION

Difference Between http get and jsonp

noreply@blogger.com (Heemanshu Bhalla) — Sat, 13 Aug 2016 21:32:00 +0000

An HTTP GET request is what you get when you enter a URI in your browser or when you click on a link on a web page. Certain HTML elements, like also generate GET requests. GET requests a resource from the server. You can pass additional information to a server-side script by adding 'query parameters' after the script, such as Example Domain.

Say you're on domain www.example.com, and you want to make a request to domainwww.example.net. To do so, you need to cross domain boundaries, a no-no in most of browserland.

Enter JSONP. When you make your request to a server that is JSONP enabled, you pass a special parameter that tells the server a little bit about your page. That way, the server is able to nicely wrap up its response in a way that your page can handle.

For example, say the server expects a parameter called "callback" to enable its JSONP capabilities. Then your request would look like:


http://www.example.net/sample.aspx?callback=mycallback

Without JSONP, this might return some basic JavaScript object, like so:


{ foo: 'bar' }

However, with JSONP, when the server receives the "callback" parameter, it wraps up the result a little differently, returning something like this:


mycallback({ foo: 'bar' });

As you can see, it will now invoke the method you specified. So, in your page, you define the callback function:


mycallback = function(data){ alert(data.foo); };

Major issue with JSONP

you lose a lot of control of the request that creates doubts in maintaining security

Angularjs Vs Jquery

noreply@blogger.com (Heemanshu Bhalla) — Fri, 12 Aug 2016 05:01:00 +0000

Answer Angularjs Vs Jquery On Quora
Angularjs Vs Jquery

jQuery will be used for things like higher level APIs, updating DOM elements, adding classes and wrapping XHR calls up nicely. Angular 1.x actually uses jQuery lite (jQLite) inside itself, or can use the full jQuery library if it's present before Angular at runtime. Using jQuery with Angular will unleash more power to Angular core as it knows you're using it, so it binds onto jQuery and passes you the full jQuery API instead of it's built-in jQLite.Remember that Angular is a data-binding MVVM framework, of which jQuery is not.

See The Major Benefits in Angular JS as Compared To Jquery

Below is Table List of Difference between jquery and Angularjs . See the Point search what that point means then analyze do you need the power or usage of that point in the project . On the basis of that Analyze Which one of them you need in your project