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What reason is there to use null instead of undefined in JavaScript?

I've been writing JavaScript for quite a long time now, and I have never had a reason to use null . It seems that undefined is always preferable and serves the same purpose programmatically. What are some practical reasons to use null instead of undefined ? ...
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VIM + JSLint?

I spend my days in vim, currently writing a lot of JavaScript. I've been trying to find a way to integrate JSLint or something similar into vim to improve my coding. Has anyone managed to do something like this? ...
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What's the best way to parse a JSON response from the requests library?

I'm using the python requests module to send a RESTful GET to a server, for which I get a response in JSON. The JSON response is basically just a list of lists. ...
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How to detect when an Android app goes to the background and come back to the foreground

I am trying to write an app that does something specific when it is brought back to the foreground after some amount of time. Is there a way to detect when an app is sent to the background or brought to the foreground? ...
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Is jQuery “each()” function synchronous?

consider this scenario for validating: 9 Answers 9 ...
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How do I update the GUI from another thread?

Which is the simplest way to update a Label from another Thread ? 47 Answers 47 ...
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Bash script error [: !=: unary operator expected

In my script I am trying to error check if the first and only argument is equal to -v but it is an optional argument. I use an if statement but I keep getting the unary operator expected error. ...
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How to style the UL list to a single line

I want to render this list in a single line. 5 Answers 5 ...
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How to add a button to PreferenceScreen

Is there any way to add a button to the bottom of preferences screen and make them work correct when scrolling? 12 Answers ...
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Why use a READ UNCOMMITTED isolation level?

In plain English, what are the disadvantages and advantages of using 10 Answers 10 ...