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What is the difference between Caching and Memoization?
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answered Jun 24 '11 at 14:46
SLaksSLaks
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Crontab - Run in directory
...? And why?
– Joshua Pinter
Apr 19 '16 at 22:51
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How to add lines to end of file on Linux
...ot"' >> /etc/sysconfig/configfile
echo 'VNCSERVERARGS[1]="-geometry 1600x1200"' >> /etc/sysconfig/configfile
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Extract substring using regexp in plain bash
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Using pure bash :
$ cat file.txt
US/Central - 10:26 PM (CST)
$ while read a b time x; do [[ $b == - ]] && echo $time; done < file.txt
another solution with bash regex :
$ [[ "US/Central - 10:26 PM (CST)" =~ -[[:space:]]*([0-9]{2}:[0-9]{2}) ]] &&
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java: Class.isInstance vs Class.isAssignableFrom
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answered Oct 16 '10 at 14:55
uckelmanuckelman
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How long is the SHA256 hash?
I'm going to run SHA256 on a password + salt, but I don't know how long to make my VARCHAR when setting up the MySQL database. What is a good length?
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Serializing an object to JSON
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edited Apr 7 '17 at 13:26
Michał Perłakowski
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