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receiver type *** for instance message is a forward declaration

... That basically means that you need to import the .h file containing the declaration of States. However, there is a lot of other stuff wrong with your code. You're -init'ing an object without +alloc'ing it. That won't work You're dec...
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What is the Swift equivalent of isEqualToString in Objective-C?

... === is identity operators whereas == is equality operator (by default call isEqual: on NSObject and its subclasses) – Bryan Chen Jun 7 '14 at 11:42 3 ...
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How to hide keyboard in swift on pressing return key?

...wDidLoad() // Do any additional setup after loading the view, typically from a nib. self.myTextField.delegate = self } func textFieldShouldReturn(_ textField: UITextField) -> Bool { self.view.endEditing(true) return false } } Code source: http://www...
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“Code too large” compilation error in Java

...size for code in Java? I wrote a function with more than 10,000 lines. Actually, each line assigns a value to an array variable. ...
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How do I get the web page contents from a WebView?

...k I found the answer in this post on lexandera.com. The code below is basically a cut-and-paste from the site. It seems to do the trick. final Context myApp = this; /* An instance of this class will be registered as a JavaScript interface */ class MyJavaScriptInterface { @JavascriptInterface ...
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Alternatives to gprof [closed]

... Valgrind has an instruction-count profiler with a very nice visualizer called KCacheGrind. As Mike Dunlavey recommends, Valgrind counts the fraction of instructions for which a procedure is live on the stack, although I'm sorry to say it appears to become confused in the presence of mutual recur...
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How to solve PHP error 'Notice: Array to string conversion in…'

...n $_POST['C']. So when you echo that, you are trying to print an array, so all it does is print Array and a notice. To print properly an array, you either loop through it and echo each element, or you can use print_r. Alternatively, if you don't know if it's an array or a string or whatever, you c...
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Automatic vertical scroll bar in WPF TextBlock?

...g its vertical height. I expected a vertical scroll bar to appear automatically when that happens, but it didn't. I tried to look for a scroll bar property in the Properties pane, but could not find one. ...
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How to open a URL in a new Tab using JavaScript or jQuery? [duplicate]

How to open a URL in new tab instead of new window programatically? 6 Answers 6 ...
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jQuery: How can i create a simple overlay?

How can I create a really basic overlay in jQuery without UI? 7 Answers 7 ...