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Putting an if-elif-else statement on one line?
...ould most likely violate PEP-8 where it is mandated that lines should not exceed 80 characters in length.
It's also against the Zen of Python: "Readability counts". (Type import this at the Python prompt to read the whole thing).
You can use a ternary expression in Python, but only for expressions...
string.charAt(x) or string[x]?
Is there any reason I should use string.charAt(x) instead of the bracket notation string[x] ?
6 Answers
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How to echo shell commands as they are executed
In a shell script, how do I echo all shell commands called and expand any variable names?
13 Answers
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Fastest way to convert string to integer in PHP
...
I've just set up a quick benchmarking exercise:
Function time to run 1 million iterations
--------------------------------------------
(int) "123": 0.55029
intval("123"): 1.0115 (183%)
(int) "0": 0.42461
...
nonlocal keyword in Python 2.x
...local variable but it seems like this keyword is not available in python 2.x. How should one access nonlocal variables in closures in these versions of python?
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How to check if a number is a power of 2
...
There's a simple trick for this problem:
bool IsPowerOfTwo(ulong x)
{
return (x & (x - 1)) == 0;
}
Note, this function will report true for 0, which is not a power of 2. If you want to exclude that, here's how:
bool IsPowerOfTwo(ulong x)
{
return (x != 0) && ((x &...
Why aren't python nested functions called closures?
... access to a local variable from an enclosing scope that has finished its execution.
def make_printer(msg):
def printer():
print msg
return printer
printer = make_printer('Foo!')
printer()
When make_printer is called, a new frame is put on the stack with the compiled code for the...
jQuery deferreds and promises - .then() vs .done()
... information on pipe().
success() and error() are only available on the jqXHR object returned by a call to ajax(). They are simple aliases for done() and fail() respectively:
jqXHR.done === jqXHR.success
jqXHR.fail === jqXHR.error
Also, done() is not limited to a single callback and will filter ...
Remove empty strings from a list of strings
...ythonic way:
>>> strings = ["first", "", "second"]
>>> [x for x in strings if x]
['first', 'second']
If the list must be modified in-place, because there are other references which must see the updated data, then use a slice assignment:
strings[:] = [x for x in strings if x]
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What is 'Currying'?
...o curried functions in several articles and blogs but I can't find a good explanation (or at least one that makes sense!)
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