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In Swift how to call method with parameters on GCD main thread?

In my app I have a function that makes an NSRURLSession and sends out an NSURLRequest using 9 Answers ...
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How do I save a UIImage to a file?

... Of course you can create subfolders in the documents folder of your app. You use NSFileManager to do that. You use UIImagePNGRepresentation to convert your image to NSData and save that to disk. // Create path. NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUser...
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How to dismiss keyboard iOS programmatically when pressing return

... simply use this in swift to dismiss keyboard: UIApplication.sharedApplication().sendAction("resignFirstResponder", to:nil, from:nil, forEvent:nil) Swift 3 UIApplication.shared.sendAction(#selector(UIResponder.resign‌​FirstResponder), to: nil, from: nil, for: nil) ...
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How to commit a change with both “message” and “description” from the command line? [duplicate]

...w I can push commits to GitHub via git (on the command line, not the Mac app). 4 Answers ...
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Django DB Settings 'Improperly Configured' Error

... Apps aren't loaded yet. – Daniil Mashkin May 31 '18 at 12:53 add a comment  |  ...
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Check for current Node Version

...{ "check-version" : "node checkVersion.js", "start-server" : "node app.js" "start" : "npm run check-version && npm run start-server", "test": "npm run check-version && echo \"Error: no test specified\" && exit 1" }, "author": "", "license": "ISC", "dep...
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Showing line numbers in IPython/Jupyter Notebooks

...'base/js/events' ], function(IPython, events) { events.on("app_initialized.NotebookApp", function () { IPython.Cell.options_default.cm_config.lineNumbers = true; } ); } ); ...
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java.lang.UnsupportedClassVersionError Unsupported major.minor version 51.0 [duplicate]

I am trying to build an application, but it gives some error. My JDK version is given below: 7 Answers ...
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Find a private field with Reflection?

...you need to be aware of when reflecting on private members is that if your application is running in medium trust (as, for instance, when you are running on a shared hosting environment), it won't find them -- the BindingFlags.NonPublic option will simply be ignored. ...
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Django: accessing session variables from within a template?

...': 'django.template.backends.django.DjangoTemplates', 'DIRS': [], 'APP_DIRS': True, 'OPTIONS': { 'context_processors': [ 'django.template.context_processors.debug', 'django.template.context_processors.request', 'django.contrib.auth.context_proc...