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What's the difference between using CGFloat and float?

I tend to use CGFloat all over the place, but I wonder if I get a senseless "performance hit" with this. CGFloat seems to be something "heavier" than float, right? At which points should I use CGFloat, and what makes really the difference? ...
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How to delete all Annotations on a MKMapView

Is there a simple way to delete all the annotations on a map without iterating through all the displayed annotations in Objective-c? ...
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How to do paging in AngularJS?

...ize" boundary-links="true"> </pagination> <!-- items/page select here if you like --> Controller todos.controller("TodoController", function($scope) { $scope.filteredTodos = [] ,$scope.currentPage = 1 ,$scope.numPerPage = 10 ,$scope.maxSize = 5; $scope.makeTodos = ...
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Why use strict and warnings?

...tify how much it helps. It should suffice to say that they help unconditionally. – ikegami Nov 6 '11 at 19:42 1 ...
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Correct Bash and shell script variable capitalization

I run across many shell scripts with variables in all caps, and I've always thought that there is a severe misunderstanding with that. My understanding is that, by convention (and perhaps by necessity long ago), environment variables are in all-caps. ...
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How to resolve : Can not find the tag library descriptor for “http://java.sun.com/jsp/jstl/core” [du

...ting a target server for my project. i.e. right-click on your project and select 'Properties' -> 'Targeted Runtimes' and select the server you going to run your web app on (Tomcat 6 or 7). share | ...
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When to use self over $this?

... $x = new Y(); $x->bar(); ?> The idea is that $this->foo() calls the foo() member function of whatever is the exact type of the current object. If the object is of type X, it thus calls X::foo(). If the object is of type Y, it calls Y::foo(). But with self::foo(), X::foo() is always ...
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What's the difference between process.cwd() vs __dirname?

... Does this mean that process.cwd() is synonym to . for all cases except for require()? – Alexander Gonchiy Aug 29 '15 at 9:44 11 ...
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Maven fails to find local artifact

Occasionally maven complains that a particular dependency, which is built and packaged locally, cannot be found in the local repository while building another project that has it as a dependency. We get an error like: ...
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How to use phpexcel to read data and insert into database?

...el_Cell::columnIndexFromString($sheet->getHighestColumn()); I am not infallible ` – Mark Baker Jun 16 '13 at 21:48 ...