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When is null or undefined used in JavaScript? [duplicate]
...e DOM methods getElementById(), nextSibling(), childNodes[n], parentNode() and so on return null (defined but having no value) when the call does not return a node object.
The property is defined, but the object it refers to does not exist.
This is one of the few times you may not want to test fo...
HTML5shiv vs Dean Edwards IE7-js vs Modernizr - which to choose?
I'm looking to build my first HTML5 site and have been looking at working with IE.
3 Answers
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Tracking Google Analytics Page Views with AngularJS
...s the frontend. Everything on the client side is done with HTML5 pushstate and I'd like to be able to track my page views in Google Analytics.
...
Cache an HTTP 'Get' service response in AngularJS?
...rJS service that makes an HTTP 'Get' request when its data object is empty and populates the data object on success.
7 Answ...
D3.js: How to get the computed width and height for an arbitrary element?
I need to know exactly the width and height for an arbitrary g element in my SVG because I need to draw a selection marker around it once the user has clicked it.
...
Heroku “psql: FATAL: remaining connection slots are reserved for non-replication superuser connectio
...t this error message when trying to access the database, both from the CLI and from loading a page on the server:
4 Answers...
tag vs tag
... behaviour is not defined anywhere. While you can in theory leave it
out and assume it will be interpreted as JavaScript, it's invalid
HTML, so why not add it.
In HTML 5, the type attribute is optional and defaults to
text/javascript
Use <script type="text/javascript"> or simply &...
What's the point of map in Haskell, when there is fmap?
...or a map function? Couldn't it just be what is currently known as fmap and fmap could be removed from the language?
3...
How do you specify the Java compiler version in a pom.xml file?
...compile it on netbeans, everything is fine, but if I want to run it on command line, I will get these errors:
5 Answers
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Defining a variable with or without export
...l process. If you want a process to make use of this variable, use export, and run the process from that shell.
name=value
means the variable scope is restricted to the shell, and is not available to any other process. You would use this for (say) loop variables, temporary variables etc.
It's im...