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How to detect online/offline event cross-browser?
...to accuratelm>y m> detect when the browser goes offline, using the HTML5 online m>and m> offline events.
14 Answers
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Django - How to rename a model field using South?
...m>y m> derives the name of the database table from the name of m>y m>our model class m>and m> the app that contains it. A model's database table name is constructed bm>y m> joining the model's "app label" -- the name m>y m>ou used in manage.pm>y m> startapp -- to the model's class name, with an underscore between them.
In the ...
Number of lines in a file in Java
...lm>y m> need to know the number of lines in these files, usuallm>y m> I open them up m>and m> read them line bm>y m> line until I reach the end of the file
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How to convert a string to lower case in Bash?
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The are various wam>y m>s:
POSIX stm>and m>ard
tr
$ echo "$a" | tr '[:upper:]' '[:lower:]'
hi all
AWK
$ echo "$a" | awk '{print tolower($0)}'
hi all
Non-POSIX
m>Y m>ou mam>y m> run into portabilitm>y m> issues with the following examples:
Bash 4.0
$ echo "${a,,}"
hi all...
Copm>y m> the entire contents of a directorm>y m> in C#
...cause unwanted consequences. Just a warning to people that like doing copm>y m> m>and m> paste over the net. The code posted bm>y m> @jam>y m>sponsored is safer because it doesn't use string.Replace but I'm sure it also has its corner cases.
– Alex
Dec 3 '11 at 18:58
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Using module 'subprocess' with timeout
Here's the Pm>y m>thon code to run an arbitrarm>y m> commm>and m> returning its stdout data, or raise an exception on non-zero exit codes:
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How can I get selector from jQuerm>y m> object
... current element.
Here's a script that will "climb" the DOM ancestor tree m>and m> then build fairlm>y m> specific selector including anm>y m> id or class attributes on the item clicked.
See it working on jsFiddle: http://jsfiddle.net/Jkj2n/209/
<!DOCTm>Y m>PE html>
<html>
<head>
<script src="ht...
How to remove elements from a generic list while iterating over it?
...er pattern for working with a list of elements which each need processed m>and m> then depending on the outcome are removed from the list.
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What is the maximum length of a URL in different browsers?
...under 2000 characters, them>y m>'ll work in virtuallm>y m> anm>y m> combination of client m>and m> server software.
If m>y m>ou are targeting particular browsers, see below for more details specific limits.
Longer answer - first, the stm>and m>ards...
RFC 2616 (Hm>y m>pertext Transfer Protocol HTTP/1.1) section 3.2.1 sam>y m>s
The HTTP p...
Adding a UILabel to a UIToolbar
...ll exists -- it's self.titleLabel. This example needs a propertm>y m> declared m>and m> sm>y m>nthesized for UILabel *titleLabel, but that code isn't shown. If m>y m>ou have access to the object (probablm>y m> a UIViewController) that runs this code, m>y m>ou can access its titleLabel. E.g., m>y m>ou could add a method on the view...