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A cron job for rails: best practices?
...ask would be something like: 30 4 * * * /bin/bash -l -c 'cd /opt/railsapp && RAILS_ENV=production rake cron --silent'
– tardate
Jul 12 '11 at 10:08
1
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how to ignore namespaces with XPath
...look at this tutorial: codesimplify.com/java/java-xpath-ignore-namespace-example
– hipokito
Jun 13 '17 at 13:02
1
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Generating an MD5 checksum of a file
...
checksum = zlib.adler32(block, checksum)
return checksum & 0xffffffff
Note that this must start off with the empty string, as Adler sums do indeed differ when starting from zero versus their sum for "", which is 1 -- CRC can start with 0 instead. The AND-ing is needed to make...
How to rotate portrait/landscape Android emulator? [duplicate]
...
Officially it's Ctrl+F11 & Ctrl+F12 or KEYPAD 7 & KEYPAD 9.
In practise it's a bit quirky.
Specifically it's Left Ctrl+F11 and Left Ctrl+F12 to switch to previous orientation and next orientation respectively.
You have to release Ctrl befo...
How does Google's Page Speed lossless image compression work?
...{} \;
You can add -m[%] to jpegoptim to lossy compress JPG images, for example:
find /path/to/jpgs/ -type f -name "*.jpg" -exec jpegoptim -m70 --strip-all {} \;
To optimize all PNGs in a directory:
find /path/to/pngs/ -type f -name "*.png" -exec optipng -o2 {} \;
-o2 is the default optimiza...
What does f+++++++++ mean in rsync logs?
... you paste some examples?
EDIT: As per http://ubuntuforums.org/showthread.php?t=1342171 those codes are defined in the rsync man page in section for the the -i, --itemize-changes option.
Fixed part if my answer based on Joao's
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PDO's query vs execute
...ause I was bulk transferring trusted data from an Ubuntu Linux box running PHP7 with the poorly supported Microsoft ODBC driver for MS SQL Server.
I arrived at this question because I had a long running script for an ETL that I was trying to squeeze for speed. It seemed intuitive to me that query c...
Using Default Arguments in a Function
I am confused about default values for PHP functions. Say I have a function like this:
12 Answers
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Representing graphs (data structure) in Python
...f._graph[node2].add(node1)
def remove(self, node):
""" Remove all references to node """
for n, cxns in self._graph.items(): # python3: items(); python2: iteritems()
try:
cxns.remove(node)
except KeyError:
pass
tr...
Git: How to return from 'detached HEAD' state
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warning: unable to unlink web/sites/default/default.settings.php: Permission denied
... other warnings ...
Note: checking out '1.87.1'.
You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
st...