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Is there a Python equivalent of the C# null-coalescing operator?
In C# there's a null-coalescing operator (written as ?? ) that allows for easy (short) null checking during assignment:
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Check if event exists on element [duplicate]
...eding the object reference ( not the jQuery object though ) to $.data, and for the second argument feed 'events' and that will return an object populated with all the events such as 'click'. You can loop through that object and see what the event handler does.
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Test if a variable is a list or tuple
...ually need. However, sometimes you need to behave differently if someone, for instance, passes a string. My preference there would be to explicitly check for str or unicode like so:
import types
isinstance(var, types.StringTypes)
N.B. Don't mistake types.StringType for types.StringTypes. The l...
How does type Dynamic work and how to use it?
...r interface - the concrete implementation is filled-in by the compiler. As for Scalas String Interpolation feature there are well defined rules describing the generated implementation. In fact, one can implement four different methods:
selectDynamic - allows to write field accessors: foo.bar
updat...
What is the fastest way to check if a class has a function defined?
...eturns the default value instead, just like hasattr does, which the OP was for some reason against.
– Santa
Mar 11 '11 at 17:28
4
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Ruby: require vs require_relative - best practice to workaround running in both Ruby =1.
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A workaround for this was just added to the 'aws' gem so thought I'd share as it was inspired by this post.
https://github.com/appoxy/aws/blob/master/lib/awsbase/require_relative.rb
unless Kernel.respond_to?(:require_relative)
module...
Rails Root directory path?
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For super correctness, you should use:
Rails.root.join('foo','bar')
which will allow your app to work on platforms where / is not the directory separator, should anyone try and run it on one.
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Is it possible to forward-declare a function in Python?
Is it possible to forward-declare a function in Python? I want to sort a list using my own cmp function before it is declared.
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How to determine whether code is running in DEBUG / RELEASE build?
...s build settings under 'Apple LLVM - Preprocessing', 'Preprocessor Macros' for debug to ensure that DEBUG is being set - do this by selecting the project and clicking on the build settings tab. Search for DEBUG and look to see if indeed DEBUG is being set.
Pay attention though. You may see DEBUG c...
Portable way to get file size (in bytes) in shell?
On Linux, I use stat --format="%s" FILE , but Solaris I have access to doesn't have stat command. What should I use then?
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