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Multiple commands in an alias for bash
...will not even be attempted unless the first one is successful. A better description of short-circuit evaluation is described in this SO question.
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How to generate random number in Bash?
...ation (and certainly not for crypto), but it's probably adequate for basic scripting tasks.
If you're doing something that requires serious random numbers you can use /dev/random or /dev/urandom if they're available:
$ dd if=/dev/urandom count=4 bs=1 | od -t d
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.net localhost website consistently making get arterySignalR/poll?transport=longPolling&connectionTo
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This "tool" basically broke my javascript code today. It prevents chrome from showing the print preview page until page reloads.
– Francisco
Apr 15 '14 at 4:15
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How do I capture SIGINT in Python?
I'm working on a python script that starts several processes and database connections. Every now and then I want to kill the script with a Ctrl + C signal, and I'd like to do some cleanup.
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Compiling with g++ using multiple cores
...nstructs bjam to build up to x concurrent commands.
We use the same build scripts on Windows and Linux and using this option halves our build times on both platforms. Nice.
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Eclipse IDE: How to zoom in on text?
...eside the perspective switcher. Those are shortcuts for editing the font description in the Preferences > General > Colors & Fonts page.
– Mickael
Apr 18 '16 at 20:46
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Difference between JSON.stringify and JSON.parse
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JSON.stringify turns a JavaScript object into JSON text and stores that JSON text in a string, eg:
var my_object = { key_1: "some text", key_2: true, key_3: 5 };
var object_as_string = JSON.stringify(my_object);
// "{"key_1":"some text","key_2":tru...
How to remove an element slowly with jQuery?
...t;</td>
</tr>
</tbody>
</table>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
</body>
</html>
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Is module __file__ attribute absolute or relative?
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__file__ is absolute since Python 3.4, except when executing a script directly using a relative path:
Module __file__ attributes (and related values) should now always contain absolute paths by default, with the sole exception of __main__.__file__ when a script has been executed dire...
How to convert list of tuples to multiple lists?
...s
Running it multiple times, append is 3x - 4x faster than zip! The test script is here:
#!/usr/bin/env python3
import time
N = 2000000
xs = list(range(1, N))
ys = list(range(N+1, N*2))
zs = list(zip(xs, ys))
t1 = time.time()
xs_, ys_ = zip(*zs)
print(len(xs_), len(ys_))
t2 = time.time()
xs_...