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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 :: (double colon) in Python when subscripting sequences?

... @UmarAsghar n means start. so the list start from nth index. Basically, [start:stop:step] – harryghgim Sep 1 at 11:42 add a comment  |  ...
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JavaScript OOP in NodeJS: how?

...onstructor.apply( this, arguments ); } //Pointless override to show super calls //note that for performance (e.g. inlining the below is impossible) //you should do //method.$getAge = _super.getAge; //and then use this.$getAge() instead of super() method.getAge = function() { return _super.getAge...
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Code Golf - π day

... Yeah, the ( operator alone allowed to shed 6 strokes! – Dan Andreatta Mar 18 '10 at 10:25 add a comment  |  ...
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Disable Visual Studio code formatting in Razor

... Actually it's worse in 2015 than the 2013 version (the same apply to C# where it will indent unrelated things each time you open a brace). I used to love visual studio but this is slowly killing it. – youen ...
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Only read selected columns

...g","Sep","Oct","Nov","Dec")) dat <- fread("data.txt", drop = c(8:13)) All result in: > data Year Jan Feb Mar Apr May Jun 1 2009 -41 -27 -25 -31 -31 -39 2 2010 -41 -27 -25 -31 -31 -39 3 2011 -21 -27 -2 -6 -10 -32 UPDATE: When you don't want fread to return a data.table, use the data.ta...
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Get a list of checked checkboxes in a div using jQuery

... Unnecessary call of constructor var selected = new Array();. Better (cheaper) with var selected = []; – Pono Mar 17 '14 at 22:45 ...
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Where do the Python unit tests go?

... For a file module.py, the unit test should normally be called test_module.py, following Pythonic naming conventions. There are several commonly accepted places to put test_module.py: In the same directory as module.py. In ../tests/test_module.py (at the same level as t...
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How to convert currentTimeMillis to a date in Java?

... Calendar objects are generally considered quite large, so should be avoided when possible. A Date object is going to be better assuming it has the functionality you need. "Date date=new Date(millis);" provided in the other answer by user AVD is going ...
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Javascript - Append HTML to container element without innerHTML

...; font-size: 30px; outline: none; padding: 0 20px; transition: all .3s; } button:hover { background: rgba(7, 99, 53, 1); color: rgba(255,255,255,1); } p { font-size: 20px; font-weight: bold; } <button type="button" onclick="addChild()">Append Child</button> ...