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node and Error: EMFILE, too many open files
...th sockets.)
From My Blog Article: http://www.blakerobertson.com/devlog/2014/1/11/how-to-determine-whats-causing-error-connect-emfile-nodejs.html
How To Isolate
This command will output the number of open handles for nodejs processes:
lsof -i -n -P | grep nodejs
COMMAND PID USER FD TYPE ...
PostgreSQL: How to change PostgreSQL user password?
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1498
For password less login:
sudo -u user_name psql db_name
To reset the password if you have f...
Static class initializer in PHP
... Peter BaileyPeter Bailey
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3
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Correct way to write loops for promise.
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edited Jul 28 '14 at 0:55
answered Jul 9 '14 at 17:36
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No @XmlRootElement generated by JAXB
...ate Java classes from the FpML (Finanial Products Markup Language) version 4.5. A ton of code is generated, but I cannot use it. Trying to serialize a simple document I get this:
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How to redirect 'print' output to a file using python?
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– machine yearning
Aug 22 '11 at 20:45
4
@my I'm not convinced it is bad for a simple script like...
How do I step out of a loop with Ruby Pry?
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417
To exit Pry unconditionally, type
exit-program
Edit from @Nick's comment: Also works:
!!!
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what is the best way to convert a json formatted key value pair to ruby hash with symbol as key?
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jaijai
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4
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Cron jobs and random times, within given hours
...ath/to/bashscript
and in /path/to/bashscript:
#!/bin/bash
maxdelay=$((14*60)) # 14 hours from 9am to 11pm, converted to minutes
for ((i=1; i<=20; i++)); do
delay=$(($RANDOM%maxdelay)) # pick an independent random delay for each of the 20 runs
(sleep $((delay*60)); /path/to/phpscript....