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How to remove all callbacks from a Handler?

... which callbacks to unregister, so if you are creating a new instance each time a post is made, you need to make sure you have references to the exact Runnable to cancel. Example: Handler myHandler = new Handler(); Runnable myRunnable = new Runnable() { public void run() { //Some inter...
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Scala list concatenation, ::: vs ++

...s in the first list. The length of the second list does not effect the runtime so it is better to append a long list to a short one rather than appending a short list to a long one. – puhlen Feb 2 '17 at 19:32 ...
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Why JavaScript rather than a standard browser virtual machine?

... Well, yes. Certainly if we had a time machine, going back and ensuring a lot of the Javascript features were designed differently would be a major pastime (that, and ensuring the people who designed IE's CSS engine never went into IT). But it's not going to ...
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Notification click: activity already open

...s approach on the activity being launched from the home screen, then every time you launch the application will start with the root activity, destroying any activities that were previously displayed on top. This certainly is not an expected behavior for a user putting the app in background while in ...
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How to use my view helpers in my ActionMailer views?

.../application_helper.rb as follows: module ApplicationHelper def mydate(time, timezone) time.in_time_zone(timezone).strftime("%A %-d %B %Y") end end I can create a dynamic email subject line and template which both use the helper but I need to tell Rails to use the ApplicationHelper expl...
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What is a serialVersionUID and why should I use it?

...bably about as good an explanation as you'll get: The serialization runtime associates with each serializable class a version number, called a serialVersionUID, which is used during deserialization to verify that the sender and receiver of a serialized object have loaded classes for that object ...
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Convert Long into Integer

... 14 Answers 14 Active ...
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Linux - Install redis-cli only

I have a Linux server with Redis installed and I want to connect to it via command line from my local Linux machine. 12 Ans...
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How do I remove duplicate items from an array in Perl?

...d skip the ones you've seen before. Use a hash to keep track. The first time the loop sees an element, that element has no key in %Seen. The "next" statement creates the key and immediately uses its value, which is "undef", so the loop continues to the "push" and increments the value for...
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How to open a Bootstrap modal window using jQuery?

...made an ajax call to a file witch included Jquery. If jQuery is included 2 times it does not work! – Vladimir verleg Jan 19 '16 at 7:14 2 ...