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How to check if hex color is “too black”?
... only the luma calculation described on the Wikipedia page is a perception-based model.
– Alnitak
Aug 20 '12 at 21:57
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PHP how to get local IP of system
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From CLI
PHP < 5.3.0
$localIP = getHostByName(php_uname('n'));
PHP >= 5.3.0
$localIP = getHostByName(getHostName());
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How do I run IDEA IntelliJ on Mac OS X with JDK 7?
...after changing JVMVersion to 1.7* in Info.plist) make sure you have LANG=en_US.UTF-8 in your environment, see the related Java issues:
http://java.net/jira/browse/MACOSX_PORT-165
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7187821
Refer to this thread for debugging launcher issues.
Pleas...
Amazon S3 boto - how to create a folder?
...der abc/123/ in your bucket, it's a piece of cake with Boto
k = bucket.new_key('abc/123/')
k.set_contents_from_string('')
Or use the console
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How do I access this object property with an illegal name?
I'm using a PHP class someone wrote to interface with the BaseCamp API.
2 Answers
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Adding a user to a group in django
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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EF Migrations: Rollback last applied migration?
...some clarification to this thread:
Update-Database -TargetMigration:"name_of_migration"
What you are doing above is saying that you want to rollback all migrations UNTIL you're left with the migration specified. Thus, if you use GET-MIGRATIONS and you find that you have A, B, C, D, and E, then u...
Identify if a string is a number
...you can discard the out parameter
var isNumeric = int.TryParse("123", out _);
The var s can be replaced by their respective types!
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Deleting multiple elements from a list
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As a function:
def multi_delete(list_, *args):
indexes = sorted(list(args), reverse=True)
for index in indexes:
del list_[index]
return list_
Runs in n log(n) time, which should make it the fastest correct solution yet.
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ERROR: Error installing capybara-webkit:
...udo apt-get install g++ qt5-default libqt5webkit5-dev gstreamer1.0-plugins-base gstreamer1.0-tools gstreamer1.0-x
Then install the gem with the required version:
gem install capybara-webkit -v '1.11.0'
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