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Detect Retina Display
...assume a device is running iOS4+ if the scale property exists, as the iPad 3.2 also contains this property.
On an iPad running iOS3.2, scale will return 1.0 in 1x mode, and 2.0 in 2x mode -- even though we know that device does not contain a Retina display. Apple changed this behavior in iOS4.2 for...
How can I get a file's size in C++? [duplicate]
...essarily return the right value. See http://stackoverflow.com/a/22986486/1835769
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How to get a random value from dictionary in python
...l work in Python 2.x where d.keys() is a list, but it won't work in Python 3.x where d.keys() is an iterator. You should do random.choice(list(d.keys())) instead.
– Duncan
Feb 1 '11 at 9:42
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Split large string in n-size chunks in JavaScript
...
You can do something like this:
"1234567890".match(/.{1,2}/g);
// Results in:
["12", "34", "56", "78", "90"]
The method will still work with strings whose size is not an exact multiple of the chunk-size:
"123456789".match(/.{1,2}/g);
// Results in:
["12", "...
How does one make random number between range for arc4random_uniform()?
... has 6 sides so I imported Foundation for access to arc4random_uniform(UInt32). I attempted using the range of (1..7) to avoid randomly getting 0 however that returned an error which I didn't enjoy too much. I tried to do this:
...
How to use php serialize() and unserialize()
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173
A PHP array or object or other complex data structure cannot be transported or stored or otherwi...
Printing 1 to 1000 without loop or conditionals
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785
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How to strip all whitespace from string
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316
Taking advantage of str.split's behavior with no sep parameter:
>>> s = " \t foo \n ...
How do I convert a PDF document to a preview image in PHP? [closed]
...edited Jan 14 '19 at 11:29
jg2703
15522 silver badges1616 bronze badges
answered Jan 22 '09 at 1:57
Paolo Berg...
Python memoising/deferred lookup property decorator
...est()
>>> t.__dict__
{}
>>> t.a
generating "a"
[0, 1, 2, 3, 4]
>>> t.__dict__
{'_lazy_a': [0, 1, 2, 3, 4]}
>>> t.a
[0, 1, 2, 3, 4]
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