Visual C++

Move the Raspberry PI root file system to a USB drive

2020-08-14T11:04:00.003+05:30

Move the Raspberry PI root file system to a USB driveHere is the articlehttps://www.pragmaticlinux.com/2020/08/move-the-raspberry-pi-root-file-system-to-a-usb-drive/

Closures in Javascript

2020-08-03T17:12:00.005+05:30

A closure is the combination of a function and the scope object in which it was created. Closures let you save stateAn examplefunction ageRelaxation(a) { return function(b) { return a + b; }; } var boy2 = ageRelaxation(2);var girl5 = ageRelaxation(5); boy2(18); // This results 20 girl5(20); // This results 25

Raspberry Pi 4 Enable SSH without having Display/HDMI Monitor

2020-06-12T12:10:00.003+05:30

When there is no HDMI monitor available for Raspberry Pi 4 and you want to enable SSH (as if it was not done before) Here are the steps to perform to enable SSH without a Monitor connected to Raspberry pi.Switch off Power of Raspberry Pi Remove the SD card from Raspberry PiInsert the SD card into SD card reader and connect to other computer. Check for that SD card mounts

Step by step reference for Extract Transform and Load (ETL) and Extract Load and Transform using Amazon Redshift

2019-12-24T11:43:00.004+05:30

ETL and ELT design patterns for lake house architecture using Amazon Redshift: Part 1 https://aws.amazon.com/blogs/big-data/etl-and-elt-design-patterns-for-lake-house-architecture-using-amazon-redshift-part-1/?nc1=b_rp ETL and ELT design patterns for lake house architecture using Amazon Redshift: Part 2 https://aws.amazon.com/blogs/big-data/

Time Complexities

2019-09-18T11:36:00.000+05:30

Common Data Structure Operations Data Structure Time Complexity Space Complexity Average Worst Worst Access Search Insertion Deletion Access Search Insertion Deletion Array Θ(1) Θ(n) Θ(n) Θ(n) O(1) O(n) O(n) O(n)

IFTTT - A platform for connected Apps

2018-12-04T12:51:00.001+05:30

Read more here:https://platform.ifttt.com/docs

Get All tables in Schema in Amazon Redshift

2018-05-28T10:11:00.002+05:30

select datname, nspname, relname from pg_class, pg_namespace, pg_database where pg_namespace.oid = relnamespace and datname ='schema_name_here' and nspname not in ('information_schema','pg_catalog','pg_toast') group by datname, nspname, relname order by datname, nspname, relname ;

Cross-origin resource sharing [CORS]

2017-11-09T10:49:00.002+05:30

Cross-origin resource sharing (CORS) is a mechanism that allows restricted resources (e.g. fonts) on a web page to be requested from another domain outside the domain from which the first resource was served. A web page may freely embed cross-origin images, stylesheets, scripts, iframes, and videos. Certain "cross-domain" requests, notably Ajax requests, however, are forbidden by default by the

Copy files from folders and sub folders to destination folder

2017-03-23T10:46:00.002+05:30

Command to copy all files with an extension from folders and sub-folders to a single destination folders Example: copy all pdf files in folders and sub folders of source folder to destination folder for /R D:\SourceFolder %f in (*.pdf) do copy "%f" D:\DestinationFolder\

What is Visual Studio Code

2017-03-22T17:00:00.001+05:30

"Visual Studio Code" A lightweight & powerful source code editor which runs on desktop and is available for Windows, mac OS and Linux. It comes with built-in support for JavaScript, TypeScript and Node.js and has a rich ecosystem of extensions for other languages like C++, C#, Python, PHP, Go) and runtimes Download it from here https://code.visualstudio.com/docs?dv=win&

What's new for VC++ in Visual Studio 2017

2017-03-22T14:54:00.000+05:30

What's New for Visual C++ in Visual Studio 2017 --------------------------------------------------------------------- https://docs.microsoft.com/en-gb/cpp/what-s-new-for-visual-cpp-in-visual-studio Community Edition Download link https://www.visualstudio.com/thank-you-downloading-visual-studio/?sku=Community&rel=15

Fix WinForms DataGridView Exception: 'Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function.'

2015-10-29T13:42:00.000+05:30

"Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function." The exception may occur while calling a refresh function on DataGridView after doing a cell edit and click another cell. To fix this add the below line in the CellEndEdit event method of the DataGridView. this.BeginInvoke(new MethodInvoker(Refresh_MyDataGridView_Method));

Get System.Data.DataTable from SQL Server Stored Procedure.

2015-09-03T09:49:00.000+05:30

public DataTable GetDataTableFromSP(string strParams) { string strConnectionString = "......."; string strSPName = "....."; DataTable dt = null; using (SqlConnection conn = new SqlConnection(strConnectionString)) { try { using (SqlDataAdapter da = new SqlDataAdapter()) {

ASP .Net HTTP Error 500.21 - Internal Server Error

2015-04-09T12:28:00.004+05:30

Resolve this error by doing below steps. 1. Open command prompt run as Administrator. .2. Run the following C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -i

Singleton pattern design and implementation

2015-03-03T14:55:00.001+05:30

Singleton pattern is a design pattern that restricts the instantiate of a class to one object. This is useful when exactly one object is needed to coordinate actions across the system. One way of creating Singleton using Mutex "A Mutex is essentially the same thing as a binary semaphore and sometimes uses the same basic implementation. The differences between them are in how they are used

C++, VC++ and MFC interview questions.

2015-03-02T21:33:00.001+05:30

1.) How many constructor can a class have? A class can have any number of constructors. However after creating a constructor explicitly the default constructor becomes invalid for that class. We will need to define a constructor with zero argument explicitly. 2.)What is the difference class and structure? The main difference between structure and class is that members in structure is public

MFC OnPaint() vs OnDraw()

2015-03-02T17:53:00.001+05:30

The two are more or less the same. OnPaint is the handler for a WM_PAINT message. OnDraw is the function that a MFC CView window calls when it receives a WM_PAINT message. We should use OnDraw if the window is derived from CView, otherwise OnPaint. OnDraw() OnPaint() A member function of CView. OnDraw is a virtual function. OnPaint handler for views

Common operators to overload

2015-03-02T12:28:00.001+05:30

Assignment Operator X& X::operator=(X rhs) { swap(rhs); return *this; } Bitshift Operators (used for Stream I/O) The bitshift operators << and >>, although still used in hardware interfacing for the bit-manipulation functions they inherit from C, have become more prevalent as overloaded stream input and output operators in most applications. For guidance overloading as

SCARY iterator

2012-02-09T18:06:00.002+05:30