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How to change Rails 3 server default port in develoment?
... projects, and you will have a lot problems later...
In your project edit script/rails this way:
#!/usr/bin/env ruby
# This command will automatically be run when you run "rails" with Rails 3 gems installed from the root of your application.
APP_PATH = File.expand_path('../../config/application',...
How can I get the behavior of GNU's readlink -f on a Mac?
...i.e., its absolute pathname.
If you want to, you can just build a shell script that uses vanilla readlink behavior to achieve the same thing. Here's an example. Obviously you could insert this in your own script where you'd like to call readlink -f
#!/bin/sh
TARGET_FILE=$1
cd `dirname $TARGE...
How to identify if a webpage is being loaded inside an iframe or directly into the browser window?
...
The description at MDN says that "if the document into which it's embedded has a different origin (such as having been located from a different domain), this is null."
– xeophin
Jan 8 '18 at 1...
Warn user before leaving web page with unsaved changes
...vant keypresses like the Ctrl key.
Won't trigger on values set through JavaScript code.
Won't trigger on cutting or pasting text through context menus.
Won't work for virtual inputs like datepickers or checkbox/radiobutton beautifiers which save their value in a hidden input through JavaScript.
Th...
How to find encoding of a file via script on Linux?
...
here is an example script using file -I and iconv which works on MacOsX
For your question you need to use mv instead of iconv
#!/bin/bash
# 2016-02-08
# check encoding and convert files
for f in *.java
do
encoding=`file -I $f | cut -f 2 -d";...
How do I get PHP errors to display?
...
To display all errors you need to:
1. Have these lines in the PHP script you're calling from the browser (typically index.php):
error_reporting(E_ALL);
ini_set('display_errors', '1');
2.(a) Make sure that this script has no syntax errors
—or—
2.(b) Set display_errors = On in your p...
How to set background color of HTML element using css properties in JavaScript
How can I set the background color of an HTML element using css in JavaScript?
17 Answers
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How to find largest objects in a SQL Server database?
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I've been using this SQL script (which I got from someone, somewhere - can't reconstruct who it came from) for ages and it's helped me quite a bit understanding and determining the size of indices and tables:
SELECT
t.name AS TableName,
i.n...
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?
...
get CSS rule's percentage value in jQuery
...ossible!
You must first hide() the parent element. This will prevent JavaScript from calculating pixels for the child element.
$('.parent').hide();
var width = $('.child').width();
$('.parent').show();
alert(width);
See my example.
Now... I wonder if I'm first to discover this hack:)
Update:
...