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Why does viewWillAppear not get called when an app comes back from the background?
...Another really badly named method is viewDidUnload. You'd think it was the opposite of viewDidLoad, but no; it's only called when there was a low memory situation which caused the view to unload, and not every time the view is actually unloaded at dealloc time.
– occulus
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curl_exec() always returns false
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+1: Simple and straight trouble-shooting for curl in PHP on curl_exec FALSE return. - Curl Verbose Mode in PHP example
– hakre
Nov 9 '12 at 20:10
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How to check if a variable is set in Bash?
...null/non-zero string variable, i.e. if set, use
if [ -n "$1" ]
It's the opposite of -z. I find myself using -n more than -z.
You would use it like:
if [ -n "$1" ]; then
echo "You supplied the first parameter!"
else
echo "First parameter not supplied."
fi
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Tables instead of DIVs [duplicate]
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It's interesting to see where the big sites use tables. Get the WebDeveloper plugin for Firefox and use the feature that lets you outline tables. Then go to the big sites. You'll see tables in some interesting places. For example, Amazon has a table that shows a ...
Mechanisms for tracking DB schema changes [closed]
...e implemented their own language-specific versions. I know of Ruckusing, a PHP migrations system that is modelled after Rails' migrations; it might be what you're looking for.
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django models selecting single field
... to values_list as Daniel mentions you can also use only (or defer for the opposite effect) to get a queryset of objects only having their id and specified fields:
Employees.objects.only('eng_name')
This will run a single query:
SELECT id, eng_name FROM employees
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How to get scrollbar position with Javascript?
... solutions have been unreliable and prone to
causing the browser and the sites the user is accessing to become
sluggish. Unfortunately, as the web has matured, the need for this
kind of information has grown. Intersection information is needed for
many reasons, such as:
Lazy-loading ...
jQuery set radio button
...n, you MUST pass the value as an array:
$('input:radio[name=cols]').val(['Site']);
$('input:radio[name=rows]').val(['Site']);
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Recommended add-ons/plugins for Microsoft Visual Studio [closed]
...yment Projects - Provides additional functionality to build and deploy Web sites and Web applications (source).
StudioTools - (FREE) Navigation assistant, code metrics tool, incremental search, file explorer in visual studio and tear off editor windows. Moved from old site (archive.org) to new sit...
Getting started with Haskell
... of info about them from google, the haskell wikibook, the haskellwiki.org site and ghc documentation.
Multiparameter type classes/functional dependencies
Type families
Existentially quantified types
Phantom types
GADTS
others...
A lot of Haskell is based around category theory, so you may want to...