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Python: fastest way to create a list of n lists
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105
The probably only way which is marginally faster than
d = [[] for x in xrange(n)]
is
from...
Selenium: FirefoxProfile exception Can't load the profile
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10 Answers
10
Active
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How do you delete an ActiveRecord object?
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edited Feb 5 '19 at 10:29
Qortex
4,71322 gold badges2626 silver badges4747 bronze badges
answered ...
Resize image in PHP
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function scale($scale) {
$width = $this->getWidth() * $scale/100;
$height = $this->getheight() * $scale/100;
$this->resize($width,$height);
}
function resize($width,$height) {
$new_image = imagecreatetruecolor($width, $height);
imagecopyresampled($...
Understanding typedefs for function pointers in C
... can use it to declare variables and so on. For example:
static void alarm_catcher(int signum)
{
fprintf(stderr, "%s() called (%d)\n", __func__, signum);
}
static void signal_catcher(int signum)
{
fprintf(stderr, "%s() called (%d) - exiting\n", __func__, signum);
exit(1);
}
static str...
How to exit a function in bash
...it.
– Yevgeniy Brikman
May 6 '16 at 10:53
1
@YevgeniyBrikman that's only true if the error in the...
'and' (boolean) vs '&' (bitwise) - Why difference in behavior with lists vs numpy arrays?
...ng also an element of Y.
– Veky
Aug 10 at 1:49
Interesting. I hadn't thought of it that way. I was thinking of {a,b} a...
How to loop backwards in python? [duplicate]
...third parameter that specifies a step. So you can do the following.
range(10, 0, -1)
Which gives
[10, 9, 8, 7, 6, 5, 4, 3, 2, 1]
But for iteration, you should really be using xrange instead. So,
xrange(10, 0, -1)
Note for Python 3 users: There are no separate range and xrange functions ...
Deadly CORS when http://localhost is the origin
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Chrome does not support localhost for CORS requests (a bug opened in 2010, marked WontFix in 2014).
To get around this you can use a domain like lvh.me (which points at 127.0.0.1 just like localhost) or start chrome with the --disable-web-security flag (assuming you're just testing).
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What is the fastest integer division supporting division by zero no matter what the result is?
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107
Inspired by some of the comments I got rid of the branch on my Pentium and gcc compiler using
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