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Painless way to install a new version of R?
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edited May 8 '19 at 2:46
Gregor Thomas
91.9k1515 gold badges126126 silver badges235235 bronze badges
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How does Python manage int and long?
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126
int and long were "unified" a few versions back. Before that it was possible to overflow an int...
How to change plot background color?
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242
Use the set_facecolor(color) method of the axes object, which you've created one of the follow...
How to Sign an Already Compiled Apk
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293
create a key using
keytool -genkey -v -keystore my-release-key.keystore -alias alias_name -k...
Setting the selected value on a Django forms.ChoiceField
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answered Mar 20 '09 at 9:04
TomTom
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Regex to match string containing two names in any order
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265
You can do checks using lookarounds:
^(?=.*\bjack\b)(?=.*\bjames\b).*$
Test it.
This appro...
How do I determine the target architecture of static library (.a) on Mac OS X?
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244
Another option is lipo; its output is brief and more readable than otool's.
An example:
% li...
What makes Lisp macros so special?
...for a common case. The line
divisibleByTwo = [x for x in range(10) if x % 2 == 0]
yields a list containing all even numbers between 0 and 9. Back in the Python 1.5 days there was no such syntax; you'd use something more like this:
divisibleByTwo = []
for x in range( 10 ):
if x % 2 == 0:
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What is the fastest or most elegant way to compute a set difference using Javascript arrays?
...if don't know if this is most effective, but perhaps the shortest
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(function(x) { return B.indexOf(x) < 0 })
console.log(diff);
Updated to ES6:
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(x => !B.includes(x) );
console.log(diff)...
How do I parse a URL query parameters, in Javascript? [duplicate]
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