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jquery if div id has children
...children().length should be called instead of size() per jQuery docs here: api.jquery.com/size
– Brian Chavez
May 7 '11 at 5:06
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How do I use reflection to call a generic method?
What's the best way to call a generic method when the type parameter isn't known at compile time, but instead is obtained dynamically at runtime?
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Android代码优化小技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...解为Foo[]与Bar[]要比(Foo,Bar)好很多。(当然，为了某些好的API的设计，可以适当做一些妥协。但是在自己的代码内部，你应该多多使用分解后的容易。
通常来说，需要避免创建更多的对象。更少的对象意味者更少的GC动作，GC会对...
Why is “if not someobj:” better than “if someobj == None:” in Python?
...a __nonzero__ special method (as do numeric built-ins, int and float), it calls this method. It must either return a bool value which is then directly used, or an int value that is considered False if equal to zero.
Otherwise, if the object has a __len__ special method (as do container built-ins, li...
How to pass an array into jQuery .data() attribute
...tuff');
When jQuery sees valid JSON in a data attribute it will automatically unpack it for you.
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Is there an equivalent to e.PageX position for 'touchstart' event as there is for click event?
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this works fine for all javascript based codes. screw jquery
– Martian2049
Aug 31 '16 at 15:37
2
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Why is the order in dictionaries and sets arbitrary?
...der:
>>> {'bar': None, 'foo': None}
{'foo': None, 'bar': None}
All slots except 3 and 4 are empty, looping over the table first lists slot 3, then slot 4, so 'foo' is listed before 'bar'.
bar and baz, however, have hash values that are exactly 8 apart and thus map to the exact same slot...
Best Practices: Salting & peppering passwords?
...e provable and make sense in order for it to be considered secure. Additionally, it has to be implementable in a maintainable way. The most secure system that can't be maintained is considered insecure (because if any part of that security breaks down, the entire system falls apart).
And peppers fi...
How to find the size of localStorage
...ly developing a site that will make use of HTML5's localStorage. I've read all about the size limitations for different browsers. However, I haven't seen anything on how to find out the current size of a localStorage instance. This question seems to indicate that JavaScript doesn't have a built in...
Inheritance and Overriding __init__ in python
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The book is a bit dated with respect to subclass-superclass calling. It's also a little dated with respect to subclassing built-in classes.
It looks like this nowadays:
class FileInfo(dict):
"""store file metadata"""
def __init__(self, filename=None):
super(FileInfo,...