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How can I check if a file exists in Perl?
...at that path, but it will also fire for a directory, a named pipe, a symlink, or a more exotic possibility. See the documentation for details.
Given the extension of .TGZ in your question, it seems that you expect a plain file rather than the alternatives. The -f file-test operator asks whether a p...
How to make MySQL handle UTF-8 properly
One of the responses to a question I asked yesterday suggested that I should make sure my database can handle UTF-8 characters correctly. How I can do this with MySQL?
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.NET / C# - Convert char[] to string
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Joel CoehoornJoel Coehoorn
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How can I get a collection of keys in a JavaScript dictionary? [duplicate]
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Use Object.keys() or shim it in older browsers...
const keys = Object.keys(driversCounter);
If you wanted values, there is Object.values() and if you want key and value, you can use Object.entries(), often paired with Array.prototype...
How to create an alias for a command in Vim?
...to.'") : ("'.a:from.'"))'
endfun
call SetupCommandAlias("W","w")
This checks that the command type is : and the command is W, so it’s safer than just cnoreabbrev W w.
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Python matplotlib multiple bars
....datetime(2011, 1, 6, 0, 0)
]
x = date2num(x)
y = [4, 9, 2]
z = [1, 2, 3]
k = [11, 12, 13]
ax = plt.subplot(111)
ax.bar(x-0.2, y, width=0.2, color='b', align='center')
ax.bar(x, z, width=0.2, color='g', align='center')
ax.bar(x+0.2, k, width=0.2, color='r', align='center')
ax.xaxis_date()
plt.sho...
Python Dictionary Comprehension
Is it possible to create a dictionary comprehension in Python (for the keys)?
8 Answers
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JS: iterating over result of getElementsByClassName using Array.forEach
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Tim DownTim Down
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How to echo shell commands as they are executed
... the same effect as set -x (or -v) later in the script.
The above also works with /bin/sh.
See the bash-hackers' wiki on set attributes, and on debugging.
$ cat shl
#!/bin/bash
DIR=/tmp/so
ls $DIR
$ bash -x shl
+ DIR=/tmp/so
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What is the equivalent of bigint in C#?
...or you get if you use something smaller and the full size is needed? A stack overflow! Yay!
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