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Callback functions in C++
In C++, when and how do you use a callback function?
10 Answers
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When is null or undefined used in JavaScript? [duplicate]
I am really confused as to when JavaScript returns null or undefined . Also different browsers seem to be returning these differently.
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What is a sealed trait?
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A sealed trait can be extended only in the same file as its declaration.
They are often used to provide an alternative to enums. Since they can be only extended in a single file, the compiler knows every possible subtypes and can reason about it.
For instan...
Javascript fuzzy search that makes sense
I'm looking for a fuzzy search JavaScript library to filter an array. I've tried using fuzzyset.js and fuse.js , but the results are terrible (there are demos you can try on the linked pages).
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Is it safe to check floating point values for equality to 0?
I know you can't rely on equality between double or decimal type values normally, but I'm wondering if 0 is a special case.
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GMSGroundOverlay animating - should I be using a CATiledLayer?
...le Maps for iOS SDK latest version 1.2.1.2944 to animate a GMSGroundOverlay . The user has control over the image sequence, so using an animated UIImage isn't a possibility sadly, so i'm loading in the UIImage on the fly. The GMSGroundOverlay.icon is set to the UIImage that is being updated...
What is in your .vimrc? [closed]
Vi and Vim allow for really awesome customization, typically stored inside a .vimrc file. Typical features for a programmer would be syntax highlighting, smart indenting and so on.
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Does JavaScript have a method like “range()” to generate a range within the supplied bounds?
In PHP, you can do...
62 Answers
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Convert Float to Int in Swift
...to an Int in Swift. Basic casting like this does not work because these types are not primitives, unlike float s and int s in Objective-C
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Zoom in on a point (using scale and translate)
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The better solution is to simply move the position of the viewport based on the change in the zoom. The zoom point is simply the point in the old zoom and the new zoom that you want to remain the same. Which is to say the viewport pre-zoomed and the viewpo...