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Validating parameters to a Bash script
...king if the directories exist at first, so I added that in, completing the script. Also, have addressed issues raised in comments; fixed the regular expression, switched from == to eq.
This should be a portable, POSIX compliant script as far as I can tell; it doesn't use any bashisms, which is actu...
Echo equivalent in PowerShell for script testing
I would like to output variables and values out in a PowerShell script by setting up flags and seeing the data matriculate throughout the script.
...
“Eliminate render-blocking CSS in above-the-fold content”
...rmance, and so far it's proven extremely successful. Things like deferring scripts worked beautifully, since I already had an in-house version of jQuery's .ready() to defer scripts until the page had loaded fully, all I had to do was inline that particular function and move the full scripts to the...
bash: shortest way to get n-th column of output
...
Because you seem to be unfamiliar with scripts, here is an example.
#!/bin/sh
# usage: svn st | x 2 | xargs rm
col=$1
shift
awk -v col="$col" '{print $col}' "${@--}"
If you save this in ~/bin/x and make sure ~/bin is in your PATH (now that is something you can ...
rvm installation not working: “RVM is not a function”
...
You need to run the following
$ source ~/.rvm/scripts/rvm
then run this
$ type rvm | head -n 1
and if you get
rvm is a function
the problem is solved.
You also need to run user$ rvm requirements to see dependency requirements for your operating system
Source: h...
How do I pass command line arguments to a Node.js program?
...launch with a specific folder. I'm not sure how to access arguments in JavaScript. I'm running node like this:
33 Answers
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Automating “enter” keypresses for bash script generating ssh keys
I would like to create script, which simply runs ssh-keygen -t rsa . But how to pass to it 3 times enter?
5 Answers
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How do you version your database schema? [closed]
...n be rolled back without losing data or functionality.
I have a migration script that contains statements that creates tables and columns if they don't exist yet and fills them with data.
The migration script runs whenever the production code is updated and after new installs.
When I would like t...
How can I get a side-by-side diff when I do “git diff”?
...le names as an argument. This means that you need to write a small wrapper-script, which takes the arguments which Git provides to the script, and hands them on to the external git program of your choice.
Let's say you put your wrapper-script under ~/scripts/my_diff.sh:
#!/bin/bash
# un-comment on...
How to set environment variables from within package.json
...
Set the environment variable in the script command:
...
"scripts": {
"start": "node app.js",
"test": "NODE_ENV=test mocha --reporter spec"
},
...
Then use process.env.NODE_ENV in your app.
Note: This is for Mac & Linux only. For Windows refer to the co...