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Counter increment in Bash loop not working
...MPFILE
# Loop goes here
# Fetch the value and increase it
COUNTER=$[$(cat $TEMPFILE) + 1]
# Store the new value
echo $COUNTER > $TEMPFILE
# Loop done, script done, delete the file
unlink $TEMPFILE
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Getting a list of associative array keys
...
You can use: Object.keys(obj)
Example:
var dictionary = {
"cats": [1, 2, 37, 38, 40, 32, 33, 35, 39, 36],
"dogs": [4, 5, 6, 3, 2]
};
// Get the keys
var keys = Object.keys(dictionary);
console.log(keys);
See reference below for browser support. It is supported in Firefox 4....
List files with certain extensions with ls and grep
...ipe (or with -1) has single column output. (Compare output of ls with ls | cat).
– mob
Sep 19 '09 at 7:07
There's a mi...
Drop rows with all zeros in pandas data frame
... community wiki
The Unfun Cat
2
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Python 3 ImportError: No module named 'ConfigParser'
... speeds from cached hostfile * base: mirror.web-ster.com * epel: mirrors.cat.pdx.edu * extras: mirror.web-ster.com * ius: mirrors.kernel.org * updates: mirror.web-ster.com No package python3-devel available. Error: Nothing to do
– viru
Jan 3 '19 at 20:49
...
How to extract the first two characters of a string in shell scripting?
...rom a file
To leave first two chars, just remove columns starting from 3
cat file | colrm 3
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sudo echo “something” >> /etc/privilegedFile doesn't work
...ious, that you can also quote a heredoc (for large blocks):
sudo bash -c "cat <<EOIPFW >> /etc/ipfw.conf
<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<plist version=\"1.0\">
<dict>
<key>Label</key>
<string>com.company.ipfw</string>
...
How do I detect whether sys.stdout is attached to terminal or not? [duplicate]
...
Small thing, but why not use cat instead?
– Azsgy
Jun 1 '18 at 1:54
It g...
Linux command to translate DomainName to IP [closed]
...u replace % with $ or just remove then it will save 1 minute for lazy copy cats :)
– Abdul Hameed
Aug 25 '18 at 12:22
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ruby operator “=~” [duplicate]
...
s = 'how now brown cow'
s =~ /cow/ # => 14
s =~ /now/ # => 4
s =~ /cat/ # => nil
If the String matches the expression, the operator returns the offset, and if it doesn't, it returns nil. It's slightly more complicated than that: see documentation here; it's a method in the String class....