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How do I use NSTimer?

...e Cocoa/CF documentation (which is always a great first port of call). The Apple docs have a section at the top of each reference article called "Companion Guides", which lists guides for the topic being documented (if any exist). For example, with NSTimer, the documentation lists two companion guid...
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How do I install the OpenSSL libraries on Ubuntu?

... You want to install the development package, which is libssl-dev: sudo apt-get install libssl-dev share | improve this answer | ...
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Django Rest Framework - Could not resolve URL for hyperlinked relationship using view name “user-det

...gin to view their wine cellar. My ModelViewSets were working just fine and all of a sudden I get this frustrating error: 17...
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What does an exclamation mark mean in the Swift language?

...pple have chosen to declare the types as implicitly unwrapped, making the calling code more convenient, but less safe. Perhaps Apple might comb through their frameworks in the future, removing the uncertainty of implicitly unwrapped ("probably never nil") parameters and replacing them with optional...
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What's the recommended way to extend AngularJS controllers?

...r for more information about but only the $scope value needs to be passed. All other values will be injected normally. @mwarren, your concern is taken care of auto-magically by Angular dependency injection. All you need is to inject $scope, although you could override the other injected values if d...
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Node.js Error: Cannot find module express

... You need to install Express locally into the context of your application (node_modules folder): $ npm install express The reason for this is that applications always look in their local context for any dependencies. The global installatio...
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Can I use my existing git repo with openshift?

... openshift repo with your local bitbucket clone. You do that by issuing locally: git merge openshift/master -s recursive -X ours With this command you tell git to merge the master branch in the openshift git repo with your local git repo. You tell it to merge using the recursive merging strategy a...
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How to check task status in Celery?

How does one check whether a task is running in celery (specifically, I'm using celery-django)? 13 Answers ...
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How can I convert a stack trace to a string?

... If you don't like including an external library for something as small and simple as this, use this answer. – Stijn de Witt Jan 31 '12 at 8:31 ...
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android.widget.Switch - on/off event listener?

...ener to change the state & passed the switch to method(in my case API call) & then used the setChecked() method to change the state(like in onFailure/onError in API call). Hope that helps. – deepak kumar Feb 21 at 9:09 ...