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Python: Checking if a 'Dictionary' is empty doesn't seem to work
...s true not only if the dict exists and is empty, but also if test_dict is None. So use this test only when you know that the dict object exists (or when the difference does not matter). The second way also has that behavior. Only the third way barks if test_dict is None.
– Andr...
How does this JavaScript/jQuery syntax work: (function( window, undefined ) { })(window)?
...p://jsperf.com/short-scope. All accesses to window will now have to travel one level less up the scope chain. As with undefined, a local copy again allows for more aggressive minification.
Sidenote:
Though this may not have been the intention of the jQuery developers, passing in window allows th...
Referencing system.management.automation.dll in Visual Studio
...ver in Visual Studio, the .NET tab does not have that assembly, and nor is one able browse to
8 Answers
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How to format strings in Java
...varargs and autoboxing improvements in Java 1.5 and turns the above into a one-liner:
MessageFormat.format("String is \"{1}\", number is {0}.", 42, "foobar");
MessageFormat is a little bit nicer for doing i18nized plurals with the choice modifier. To specify a message that correctly uses the sin...
How do I dynamically assign properties to an object in TypeScript?
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Or all in one go:
var obj:any = {}
obj.prop = 5;
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How to hide UINavigationBar 1px bottom line
...t when needed.
Instructions below assume you need hairline hidden only in one controller of your UINavigationController hierarchy.
Declare instance variable:
private var shadowImageView: UIImageView?
Add method which finds this shadow (hairline) UIImageView:
private func findShadowImage(under ...
Check if a Python list item contains a string inside another string
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I have to check if one item is in an array of 6 elements. Is it quicker to do 6 "if" or is it the same?
– Olivier Pons
Mar 10 '13 at 0:11
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Replace console output in Python
I'm wondering how I could create one of those nifty console counters in Python as in certain C/C++-programs.
10 Answers
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Is there a way to ignore header lines in a UNIX sort?
...ile, but it's starting to get ugly enough that it's probably better to use one of the awk-based solutions given in the other responses.
– BobS
Nov 23 '14 at 0:04
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What is the “double tilde” (~~) operator in JavaScript? [duplicate]
...that you need to use it a lot before it's noticable. In a functon like the one in the OP it's just micro optimisation, and only makes the code harder to follow.
– Guffa
May 11 '11 at 23:51
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