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Detect the Internet connection is offline?

How to detect the Internet connection is offline in JavaScript? 18 Answers 18 ...
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Akka Kill vs. Stop vs. Poison Pill?

Newbie question of Akka - I'm reading over Akka Essentials, could someone please explain the difference between Akka Stop/Poison Pill vs. Kill ? The book offers just a small explaination "Kill is synchronous vs. Poison pill is asynchronous." But in what way? Does the calling actor thread lock during...
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Why are local variables not initialized in Java?

Was there any reason why the designers of Java felt that local variables should not be given a default value? Seriously, if instance variables can be given a default value, then why can't we do the same for local variables? ...
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CSS horizontal centering of a fixed div?

I know this question is a million times out there, however I can't find a solution to my case. I've got a div, which should be fixed on the screen, even if the page is scrolled it should always stay CENTERED in the middle of the screen! ...
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Are there any cases when it's preferable to use a plain old Thread object instead of one of the newe

I see a lot of people in blog posts and here on SO either avoiding or advising against the usage of the Thread class in recent versions of C# (and I mean of course 4.0+, with the addition of Task & friends). Even before, there were debates about the fact that a plain old thread's functionality c...
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I have an error: setOnItemClickListener cannot be used with a spinner, what is wrong?

Kindly This is my code below, and I am pasting the error messages underneath: I am trying to use setOnItemClickListener on the spinner, is it permissible? ...
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Becoming better at Vim [closed]

I've been using Vim for quite a long time, but I'm at a level where I use insert mode most of the time, and I still use the arrow keys to move around(!). ...
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Set EditText cursor color

I am having this issue where I am using the Android's Holo theme on a tablet project. However, I have a fragment on screen which has a white background. I am adding an EditText component on this fragment. I've tried to override the theme by setting the background of the Holo.Light theme resources....
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What does `kill -0 $pid` in a shell script do?

Basically, what signal does '0' represent, because here I see SIGNAL numbers starting from 1. 6 Answers ...
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Getting realtime output using subprocess

...ng to write a wrapper script for a command line program (svnadmin verify) that will display a nice progress indicator for the operation. This requires me to be able to see each line of output from the wrapped program as soon as it is output. ...