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How can I find out if I have Xcode commandline tools installed?

... of all, be sure that you have downloaded it or not. Open up your terminal application, and enter $ gcc if you have not installed it you will get an alert. You can verify that you have installed it by $ xcode-select -p /Library/Developer/CommandLineTools And to be sure then enter $ gcc --version...
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Error : BinderProxy@45d459c0 is not valid; is your activity running?

... This is most likely happening because you are trying to show a dialog after execution of a background thread, while the Activity is being destroyed. I was seeing this error reported once in a while from some of my apps when the activity calling ...
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What is NSZombie?

...nment variable is not the best way to find and track these. A much better approach to zombie detection, is just to use Instruments - from XCode start with "Run with Instrument" and choose "Allocations". Then stop the recording right after it starts, press the "i" button on the Allocations instrume...
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Why do people say that Ruby is slow? [closed]

... Ruby to be slow but then again, I'm just using it to make simple CRUD apps and company blogs. What sort of projects would I need to be doing before I find Ruby becoming slow? Or is this slowness just something that affects all programming languages? Ruby probably wouldn't serve you ...
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Is there a method that works like start fragment for result?

...ragment in an overlay. This is for signing in to the service. In the phone app, each of the steps I want to show in the overlay are their own screens and activities. There are 3 parts of the sign-in process and each had their own activity that was called with startActivityForResult(). ...
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Good way of getting the user's location in Android

... Looks like we're coding the same application ;-) Here is my current implementation. I'm still in the beta testing phase of my GPS uploader app, so there might be many possible improvements. but it seems to work pretty well so far. /** * try to get the 'bes...
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Exclude all transitive dependencies of a single dependency

...in the exclusion element. I have a multi-module project that contains an "app" module that is referenced in two WAR-packaged modules. One of those WAR-packaged modules really only needs the domain classes (and I haven't separated them out of the app module yet). I found this to work: <dependenc...
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How can I run PowerShell with the .NET 4 runtime?

.../> </startup> </configuration> You can build .NET 4.0 applications that call PowerShell using the PowerShell API (System.Management.Automation.PowerShell) just fine, but these steps will help get the in-the-box PowerShell hosts to work under .NET 4.0. Remove the registry keys...
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setting an environment variable in virtualenv

...onment variables to get its configuration, but I use virtualenv to test my app locally first. 10 Answers ...
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File path to resource in our war/WEB-INF folder?

I've got a file in my war/WEB-INF folder of my app engine project. I read in the FAQs that you can read a file from there in a servlet context. I don't know how to form the path to the resource though: ...