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How can I make a div stick to the top of the screen once it's been scrolled to?
...: -webkit-sticky.
Polyfills are available for Internet Explorer and Edge; https://github.com/wilddeer/stickyfill seems to be a good one.
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UITextField text change event
...tter:
This involves the Key-Value Observing (KVO) feature of Objective-C (http://developer.apple.com/library/ios/#documentation/cocoa/conceptual/KeyValueObserving/KeyValueObserving.html#//apple_ref/doc/uid/10000177-BCICJDHA).
Basically, you register yourself as an observer of a property and if thi...
Join strings with a delimiter only if strings are not null or empty
...prevents optimizations in JavaScript engines (V8 for example).
// (See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/arguments)
// So we construct a new array by iterating through the arguments object
var argsLength = arguments.length,
strings = [];
...
Python exit commands - why so many and when should each be used?
...ution. The choices I've found are: quit() , exit() , sys.exit() , os._exit()
4 Answers
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Inserting string at position x of another string
... a jsperf. This is a note to anyone who reads this in the future. jsperf.com/javascript-string-splice. Tested in latest FF/Chrome/IE10/IE9. I would use lean nickf's approach over this one for both clarity and performance.
– junkyspace
Aug 15 '13 at 19:47
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What is the Python equivalent of static variables inside a function?
...e at the top instead of the bottom, you can create a decorator:
def static_vars(**kwargs):
def decorate(func):
for k in kwargs:
setattr(func, k, kwargs[k])
return func
return decorate
Then use the code like this:
@static_vars(counter=0)
def foo():
foo.coun...
How to find the width of a div using vanilla JavaScript?
... edited Nov 4 '15 at 11:07
sudo_dudo
50744 silver badges1616 bronze badges
answered Sep 12 '14 at 18:10
user3...
Which is faster : if (bool) or if(int)?
...
Does this also apply to 64-bit processes, that __int64 is faster than int? Or CPU deals 32-bit integer with 32-bit instruction sets separately?
– Crend King
Apr 27 '11 at 21:22
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Loop backwards using indices in Python?
...as no way to tell the xrange to go backwards... (Since Python 2.6 it calls __reversed__().)
– Robert Siemer
Jun 21 '12 at 18:31
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“Bitmap too large to be uploaded into a texture”
...
See Romain's answer here: stackoverflow.com/questions/7428996/…
– Ben Lee
Sep 5 '12 at 13:31
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