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How can I check if a command exists in a shell script? [duplicate]
... only)
You can put any of them to your if clause. According to my tests (https://www.topbug.net/blog/2016/10/11/speed-test-check-the-existence-of-a-command-in-bash-and-zsh/), the 1st and 3rd method are recommended in bash and the 5th method is recommended in zsh in terms of speed.
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What difference does .AsNoTracking() make?
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How to calculate the number of occurrence of a given character in each row of a column of strings?
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A variation of https://stackoverflow.com/a/12430764/589165 is
> nchar(gsub("[^a]", "", q.data$string))
[1] 2 1 0
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How to install PyQt4 on Windows using pip?
...lve your purpose. The .exe windows installers can be downloaded from :
https://sourceforge.net/projects/pyqt/files/PyQt4/PyQt-4.11.4/
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How to check if a string is a valid JSON string in JavaScript without using Try/Catch
...ill work in most cases, not all cases.
Have a look around the line 450 in https://github.com/douglascrockford/JSON-js/blob/master/json2.js
There is a regexp that check for a valid JSON, something like:
if (/^[\],:{}\s]*$/.test(text.replace(/\\["\\\/bfnrtu]/g, '@').
replace(/"[^"\\\n\r]*"|true|fal...
How do I set up IntelliJ IDEA for Android applications?
... Java platform)
define the environment variable in windows System setting https://confluence.atlassian.com/display/DOC/Setting+the+JAVA_HOME+Variable+in+Windows
Voila ! You are Donezo !
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Detecting input change in jQuery?
... the jQuery .val() method) won't fire any of the events above.
(Reference: https://api.jquery.com/change/).
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Bash history without line numbers
...(as well as other options for history formatting)
zsh> fc -ln 0
(See https://serverfault.com/questions/114988/removing-history-or-line-numbers-from-zsh-history-file)
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postgres: upgrade a user to be a superuser?
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How to namespace Twitter Bootstrap so styles don't conflict
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I did a GIST with Bootstrap 3 all inside a class named .bootstrap-wrapper
https://gist.github.com/onigetoc/20c4c3933cabd8672e3e
I started with this tool: http://www.css-prefix.com/
And fix the rest with search and replace in PHPstorm.
All fonts @font-face are hosted on maxcdn.
First line example
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