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How to start two threads at “exactly” the same time

...he gate. // Since we gave "3" as the argument, gate is not opened yet. // Now if we block on the gate from the main thread, it will open // and all threads will start to do stuff! gate.await(); System.out.println("all threads started"); This doesn't have to be a CyclicBarrier, you could also use...
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Apache Prefork vs Worker MPM

...ing Module implementing a hybrid multi-threaded multi-process web server Now, to the difference between prefork and worker. The prefork MPM implements a non-threaded, pre-forking web server that handles requests in a manner similar to Apache 1.3. It is appropriate for sites that need to ...
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Analyze audio using Fast Fourier Transform

...-Shannon Sampling Theorem if you are a glutton for punishment and need to know why, but the basic result is that your lower frequencies are going to be replicated or aliased in the higher frequency buckets. So the frequencies will start from 0, increase by 172 Hz for each coefficient up to the N/2 c...
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Setting action for back button in navigation controller

...indexOfObject:self]==NSNotFound) { // back button was pressed. We know this is true because self is no longer // in the navigation stack. } [super viewWillDisappear:animated]; } share | ...
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font-style: italic vs oblique in CSS

...not to be italicized or obliqued... but people did anyway. And as you may know, some operating systems will, upon clicking the 'italic' icon, skew the font and create an oblique on the fly. Not a pleasant sight. It's best to specify an italic only when you're sure that font has been designed with o...
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What is the advantage of using abstract classes instead of traits?

... performance overhead. However, you should make this choice only if you know that the trait in question constitutes a performance bottleneck and have evidence that using a class instead actually solves the problem. If you still do not know, after considering the above, then start by mak...
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How do I start PowerShell from Windows Explorer?

...OT\Directory\Background\shell\powershell] @="Open PowerShell window here" "NoWorkingDirectory"="" [HKEY_CLASSES_ROOT\Directory\Background\shell\powershell\command] @="C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe -NoExit -Command Set-Location -LiteralPath '%V'" ; ; Add context men...
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Nested Models in Backbone.js, how to approach

...ure the structure of the nested model when you're reading from the server. Now, you would notice that saving or setting is actually not handled here because I feel that it makes sense for you to set the nested model explicitly using the proper model. Like so: image.set({layout : new Layout({x: 100...
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Get real path from URI, Android KitKat new storage access framework [duplicate]

..., so you suggest working with URIs instead of trying to get file path. But now with different URI format that will not work Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(uri, "video/*"); startActivity(intent); – kamil zych Dec 17 '13 at...
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How do you create a remote Git branch?

...or the remote branch will be deleted! So that a subsequent git pull will know what to do, you might instead want to use: git push --set-upstream <remote-name> <local-branch-name> As described below, the --set-upstream option sets up an upstream branch: For every branch that is u...