大约有 24,000 项符合查询结果（耗时：0.0244秒） [XML]
How to sort a list/tuple of lists/tuples by the element at a given index?
... itemgetter instance does not. tl;dr: Always use itemgetter, because speed wins.
– Cecil Curry
Nov 29 '16 at 6:02
...
Using numpy to build an array of all combinations of two arrays
...
The following numpy implementation should be approx. 2x the speed of the given answer:
def cartesian2(arrays):
arrays = [np.asarray(a) for a in arrays]
shape = (len(x) for x in arrays)
ix = np.indices(shape, dtype=int)
...
Python set to list
...
Your code works with Python 3.2.1 on Win7 x64
a = set(["Blah", "Hello"])
a = list(a)
type(a)
<class 'list'>
share
|
improve this answer
|
...
How to split long commands over multiple lines in PowerShell
How do you take a command like the following in PowerShell and split it across multiple lines?
8 Answers
...
When to use NSInteger vs. int
...this:
#if __LP64__ || TARGET_OS_EMBEDDED || TARGET_OS_IPHONE || TARGET_OS_WIN32 || NS_BUILD_32_LIKE_64
typedef long NSInteger;
typedef unsigned long NSUInteger;
#else
typedef int NSInteger;
typedef unsigned int NSUInteger;
#endif
With regard to the correct format specifier you should use for each...
How can I open a link in a new window?
...or a specific link, inside that I want to do something similar to the following:
10 Answers
...
What are the differences between json and simplejson Python modules?
...
On my Win7 PC (i7 CPU), json (CPython 3.5.0) is 68%|45% faster on simple|complex dumps and 35%|17% on simple|complex loads w.r.t. simplejson v3.8.0 with C speedups using your benchmark code. Therefore, I would not use simplejson an...
How to detect Safari, Chrome, IE, Firefox and Opera browser?
...
Only use the browser detection method if it's truly necessary, such as showing browser-specific instructions to install an extension. Use feature detection when possible.
Demo: https://jsfiddle.net/6spj1059/
// Opera 8.0+
var isOpera = (!!window.opr && !!opr.addons) || !!window.opera ||...
Python Create unix timestamp five minutes in the future
...
It's also more portable than %s flag to strftime (which doesn't work on Windows).
share
|
improve this answer
|
follow
|
...
How to get the first line of a file in a bash script?
...thod doesn't work as written, because read doesn't print anything (so line winds up blank), and also executes in a subshell (so FIRSTLINE gets set to the first line, but only in the subshell, so it's not available afterward). Solution: just use read -r line <filename
– Gord...