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How do I prompt for Yes/No/Cancel input in a Linux shell script?
I want to pause input in a shell script, and prompt the user for choices.
The standard Yes , No , or Cancel type question.
How do I accomplish this in a typical bash prompt?
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Really Cheap Command-Line Option Parsing in Ruby
...but it's still falsey, so it works just fine for throwaway tools and quick scripts.
One caveat pointed out by FelipeC in the comments in "How to do really cheap command-line option parsing in Ruby", is that your shell might not support the 3-token shebang; you may need to replace /usr/bin/env ruby ...
Is there a version control system for database structure changes?
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In Ruby on Rails, there's a concept of a migration -- a quick script to change the database.
You generate a migration file, which has rules to increase the db version (such as adding a column) and rules to downgrade the version (such as removing a column). Each migration is numbered, a...
memory_get_peak_usage() with “real usage”
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Ok, lets test this using a simple script:
ini_set('memory_limit', '1M');
$x = '';
while(true) {
echo "not real: ".(memory_get_peak_usage(false)/1024/1024)." MiB\n";
echo "real: ".(memory_get_peak_usage(true)/1024/1024)." MiB\n\n";
$x .= str_repeat(' ',...
$(document).ready equivalent without jQuery
I have a script that uses $(document).ready , but it doesn't use anything else from jQuery. I'd like to lighten it up by removing the jQuery dependency.
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How to run script as another user without password?
I have script.sh that must be run as user2. However, this script can only be run under user1 in my application.
3 Answers
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What is the best way to detect a mobile device?
...ing similar to the CSS @media attribute? I would like to run a different script if the browser is on a handheld device.
5...
How to run a function when the page is loaded?
...equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">
function codeAddress() {
alert('ok');
}
window.onload = codeAddress;
</script>
</head>
<body>
</body...
How can I prevent the backspace key from navigating back?
...d by tabbing). Replace with my code to fix.
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).keydown(function(e) {
var doPrevent;
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Scheduling R Script
I have written an R script that pulls some data from a database, performs several operations on it and post the output to a new database.
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