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How to check programmatically if an application is installed or not in Android?

...e name which we want to check boolean isAppInstalled = appInstalledOrNot("com.check.application"); if(isAppInstalled) { //This intent will help you to launch if the package is already installed Intent LaunchIntent = getPackageManager() .getL...
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How does StartCoroutine / yield return pattern really work in Unity?

I understand the principle of coroutines. I know how to get the standard StartCoroutine / yield return pattern to work in C# in Unity, e.g. invoke a method returning IEnumerator via StartCoroutine and in that method do something, do yield return new WaitForSeconds(1); to wait a second, th...
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What is the canonical way to determine commandline vs. http execution of a PHP script?

... script that needs to determine if it's been executed via the command-line or via HTTP, primarily for output-formatting purposes. What's the canonical way of doing this? I had thought it was to inspect SERVER['argc'] , but it turns out this is populated, even when using the 'Apache 2.0 Handler' ser...
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Reuse Cucumber steps

... step "I login with valid credentials" end Old, deprecated method (for reference): You can call steps from other steps like this: Given /^I login successfully$/ Given "I login with valid credentials" Then "I should be logged in" end If all of the scenarios within a feature require thi...
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Should I use document.createDocumentFragment or document.createElement

... Thanks for the response. You say that it allows for multiple insert at the same time but I can achieve that using doc.createElement. The only difference being I had to wrap the elements in a <span> tag first and then insert tha...
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What is the difference between ~> and >= when specifying rubygem in Gemfile?

...preceding it in the string cannot be greater than what you provided. Thus for ~>0.8.5, any value is acceptable for the third digit (the 5) provided that it is greater than or equal to 5, but the leading 0.8 must be "0.8". You might do this, for example, if you think that the 0.9 version is going...
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Iterator Loop vs index loop [duplicate]

I'm reviewing my knowledge on C++ and I've stumbled upon iterators. One thing I want to know is what makes them so special and I want to know why this: ...
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Git SSH error: “Connect to host: Bad file number”

... After having this problem myself, I found a solution that works for me: Error message: ssh -v git@github.com OpenSSH_5.8p1, OpenSSL 1.0.0d 8 Feb 2011 debug1: Connecting to github.com [207.97.227.239] port 22. debug1: connect to address 207.97.227.239 port 22: Conne...
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Closing WebSocket correctly (HTML5, Javascript)

... the connection gracefully? Like, what happens if user refreshes the page, or just closes the browser? 5 Answers ...
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STAThread and multithreading

...e of the APIs you call use COM "under the covers", then you don't need to worry about apartments. If you do need to be aware of apartments, then the details can get a little complicated; a probably-oversimplified version is that COM objects tagged as STA must be run on an STAThread, and COM objects...