Guillaume Laforge's blog feed

Vert.x 1.0 released with its Groovy support

2012-05-10T10:25:00Z

Tim Fox yesterday announced the release of Vert.x 1.0.

Vert.xI was reading MrHaki's interview on the GR8Conf website this morning, and he had some nice words and good points about why it's important to attend the conference. You get to meet the creators and developers of the projects you're interested in and have great content (emphasis mine):

Domain-Specific Languages in Groovy. I've already shared the link here and there (twitter, Google+, mailing-list), but not yet on my blog. So consder this fixed now. This new presentation is inspired from the beta DSL chapter from the second edition of Groovy in Action, where you'll learn how to create a DSL for a little Mars robot. This is a pretty practical approach, bottom-up, as you progressively build the DSL, rather than listing all the existing techniques and illustrate them. I feel the flow is a bit better that way. Anyway... enjoy:
In the Vi vs Emacs war, I'm in the Vi camp. I'm using Vim on the command-line to quickly edit files, and I'm also using MacVim on my Mac as my text editor. When I'm not using an IDE or the Groovy Console, I also want to be able to edit and run my Groovy scripts in my text editor. It's not too difficult to run a Groovy script from Vi, you can simply do:
:!groovy %
You use the colon to enter the command mode, then use the bang to issue a shell command. Here, obviously, I'm...

Groovy at Devoxx France

2012-04-23T08:22:00Z
Last week saw the first edition of Devoxx France. And what a success it was! The conference was sold out at 1200 persons. There was a great wealth of interesting topics and many passionate attendees to talk to. Overall, I come back home impressed that the first edition worked out so well, flawlessly, and was such a joy to attend. So a big thank you and congrats to all those involved in making Devoxx France such a great event!

Along with Cédric Champeau, I had the pleasure to present the novelties of Groovy 2.0 (and a bit of retrospective on some of the key features of Groovy 1.8). We covered quickly the invoke dynamic support and modularization, and went into more depth into the This is this time of the year where all the Groovy hackers and fans are meeting together in Denmark, Copenhagen, for the GR8Conf conference. A conference dedicated to Groovy, Grails, Gradle, Griffon, Spock, GPars and all the Groovy ecosystem. If you're interested in these technologies or are already using them, this is the opportunity you shouldn't miss.

Also, you're pretty lucky, because I have a ticket for half the price to offer you! But there's just one seat I can offer at that price. So if you're interested, please add a nice comment to this post, that may be fun, or explaining why you'd like to come, and in a few weeks, I'll tell you...

bash tip: find and grep through files

2012-03-29T09:18:00Z
It happens once in a while that I want to find all files containing a certain string. I know command-line tools such as grep, cat, and find, but I never remember the right combination to achieve that task. So as to remember and reference it later, I write this small blog post to remind me how to do it:
find . -type f -exec grep YOURSTRING /dev/null {} \;
The find . part will search from the current directory (and all its subdirectories), - type f to search for files (not directories or links, etc), -exec to use the grep command to find through the files, with YOURSTRING as query string, /dev/null to throw away the errors you don't care about, and {} is the current file to search into with grep.

Update: a simple approach proposed in the comments is
grep -r YOURSTRING *

Incomplete string regex matching

2012-03-27T15:19:00Z
Once in a while, I stumble upon the need of being able to tell whether a string could match a certain regular expression pattern, if it were given some more characters.

For example, a user is typing a time in an input field, following the pattern of 2 digits, a colon, and 2 other digits. He enters the first two digits and the colon, and we're wondering if the time could be valid if he entered some more keystrokes.

I found the JRegex project and its documentation about incomplete matching which showed me that it was possible to achieve such a goal. But using JRegex is adding another library on the classpath for such a small requirement, that I started wondering if there was a way to emulate that with Java's own regex support.

We're used to methods like Whats new in Groovy 2.0?
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Speaking of Groovy 2.0 at 33rd Degree, in Poland

2012-03-18T16:01:00Z
Tomorrow I'm flying to Krakow, in Poland, to speak about the upcoming Groovy 2.0 release, at the 33rd Degree conference. I'm looking forward to meeting some of you there!