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Run cron job only if it isn't already running
So I'm trying to set up a cron job as a sort of watchdog for a daemon that I've created. If the daemon errors out and fails, I want the cron job to periodically restart it... I'm not sure how possible this is, but I read through a couple of cron tutorials and couldn't find anything that would do wha...
jQuery - If element has class do this
...ed an jQuery script that will see if any element has an specific class and do an action like change position.
1 Answer
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How do I load my script into the node.js REPL?
... depend on your use case.
Edit: It has limited applicability because it does not work in strict mode, but three years later I have learned that if your script does not have 'use strict', you can use eval to load your script without polluting the REPL history:
var fs = require('fs');
eval(fs.read...
How to group time by hour or by 10 minutes
like when I do
13 Answers
13
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“Invalid form control” only in Google Chrome
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Thanks, this works. It's a shame Chrome does this though, it should just skip the field.
– 472084
Mar 29 '13 at 16:14
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Problems with entering Git commit message with Vim
OS: Windows
5 Answers
5
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How do I update Ruby Gems from behind a Proxy (ISA-NTLM)
...e to get mine working from the command-line switch but I have been able to do it just by setting my HTTP_PROXY environment variable. (Note that case seems to be important). I have a batch file that has a line like this in it:
SET HTTP_PROXY=http://%USER%:%PASSWORD%@%SERVER%:%PORT%
I set the four ...
How do I move to end of line in Vim?
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Just the $ (dollar sign) key. You can use A to move to the end of the line and switch to editing mode (Append). To jump the last non-blank character, you can press g then _ keys.
The opposite of A is I (Insert mode at beginning of lin...
What does the 'b' character do in front of a string literal?
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To quote the Python 2.x documentation:
A prefix of 'b' or 'B' is ignored in
Python 2; it indicates that the
literal should become a bytes literal
in Python 3 (e.g. when code is
automatically converted with 2to3). A
'u' or 'b' prefix ma...
How do I find duplicates across multiple columns?
So I want to do something like this sql code below:
7 Answers
7
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