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What's the significance of Oct 12 1999? [closed]
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PS: Who would win in a fight between Jon Skeet and The Gu?
– Portman
Apr 9 '09 at 4:23
39
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Using numpy to build an array of all combinations of two arrays
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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)
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Unable to install gem - Failed to build gem native extension - cannot load such file — mkmf (LoadErr
...uby1.9.1-dev
Should fix your problem.
Still not working? Try the following after installing ruby-dev:
sudo apt-get install make
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Python set to list
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Your code works with Python 3.2.1 on Win7 x64
a = set(["Blah", "Hello"])
a = list(a)
type(a)
<class 'list'>
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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
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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
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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
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Python Create unix timestamp five minutes in the future
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It's also more portable than %s flag to strftime (which doesn't work on Windows).
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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...