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Checking if a variable is defined?
...ring
=> "constant"
>> defined? 1
=> "expression"
As skalee commented: "It is worth noting that variable which is set to nil is initialized."
>> n = nil
>> defined? n
=> "local-variable"
sh...
How can I pass command-line arguments to a Perl program?
I'm working on a Perl script. How can I pass command line parameters to it?
9 Answers
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How do I create a comma-separated list from an array in PHP?
I know how to loop through items of an array using foreach and append a comma, but it's always a pain having to take off the final comma. Is there an easy PHP way of doing it?
...
.gitignore file, where should I put it in my xcode project?
...changes or are new into the repository will not be shown to as waiting for commit.
You can also have one global local git ignore file, that will manage all of your git repositories.
git config --global core.excludesfile ~/.gitignore_global
This alternative is particularly interesting for ignored ...
Refresh Fragment at reload
...rtFragmentManager().beginTransaction();
ft.detach(frg);
ft.attach(frg);
ft.commit();
Your_Fragment_TAG is the name you gave your fragment when you created it
This code is for support library.
If you're not supporting older devices, just use getFragmentManager instead of getSupportFragmentManager...
What is the best way to filter a Java Collection?
...red Sep 6 '09 at 13:37
Mario FuscoMario Fusco
12k33 gold badges2323 silver badges3535 bronze badges
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How to ignore files/directories in TFS for avoiding them to go to central source repository?
...hosted offering)
The NuGet documentation provides instructions on how to accomplish this and I just followed them successfully for Visual Studio 2015 & Visual Studio 2017 against VSTS (Azure-hosted TFS). Everything is fully updated as of Nov 2016 Aug 2018.
I recommend you follow NuGet's instruct...
horizontal scrollbar on top and bottom of table
... Did you get it to work? For more on jQuery, see api.jquery.com/scrollLeft (Of course, you can do it without jQuery by attaching onscroll handlers directly.) For graceful degradation for users with no JS, you can add the dummy div to the DOM by JS.
– StanleyH
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Can a CSS class inherit one or more other classes?
...
There are tools like LESS, which allow you to compose CSS at a higher level of abstraction similar to what you describe.
Less calls these "Mixins"
Instead of
/* CSS */
#header {
-moz-border-radius: 8px;
-webkit-border-radius: 8px;
border-radius: 8px;
}
#foote...
Facebook Architecture [closed]
...the biggest ace up their sleeve is the Hiphop.
http://developers.facebook.com/blog/post/358
You can use HipHop yourself:
https://github.com/facebook/hiphop-php/wiki
But if you ask me it's a very ambitious and probably time wasting task. Hiphop only supports so much, it can't simply convert everyth...