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Explain the use of a bit vector for determining if all characters are unique

...ay be a little bit faster, because operations with bits are very low level and can be executed as-is by CPU. BitVector allows writing a little bit less cryptic code instead plus it can store more flags. For future reference: bit vector is also known as bitSet or bitArray. Here are some links to thi...
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How do emulators work and how are they written? [closed]

... Emulation is a multi-faceted area. Here are the basic ideas and functional components. I'm going to break it into pieces and then fill in the details via edits. Many of the things I'm going to describe will require knowledge of the inner workings of processors -- assembly knowledge ...
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What makes Lisp macros so special?

...not had the privilege of using Lisp macros. As someone who wants to understand the buzz, please explain what makes this feature so powerful. ...
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UIButton: how to center an image and a text using imageEdgeInsets and titleEdgeInsets?

If I put only an image in a button and set the imageEdgeInsets more close to the top, the image stays centered and all works as expected: ...
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Why should I learn Lisp? [closed]

I really feel that I should learn Lisp and there are plenty of good resources out there to help me do it. 29 Answers ...
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Sending event when AngularJS finished loading

...d to the exact answer... EDIT 1 hour later: Ok, well, I looked at ngCloak and it's really short. What this obviously implies is that the compile function won't get executed until {{template}} expressions have been evaluated (i.e. the template it loaded), thus the nice functionality of the ngCloak d...
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Understanding promises in Node.js

... Promises in node.js promised to do some work and then had separate callbacks that would be executed for success and failure as well as handling timeouts. Another way to think of promises in node.js was that they were emitters that could emit only two events: success and...
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Adaptive segue in storyboard Xcode 6. Is push deprecated?

...pricated)" instead? It should; it does for me. I am using Xcode 6 beta 2 and to test I used the single view template (calling the pre made view controller in IB ‘VC_A’). I then added another view controller (‘VC_B’). I then added a button on VC_A to show VC_B and another from VC_B back to ...
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How to study design patterns? [closed]

...reading about them. Take some sample implementations that you find online and build up around them. A great resource is the Data & Object Factory page. They go over the patterns, and give you both conceptual and real world examples. Their reference material is great, too. ...
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Is there any reason for using WebGL instead of 2D Canvas for 2D games/apps?

...more platfrom-independant So I'll discuss the differences between canvas and webGL APIs regarding these qualities. Both canvas and webGL are JavaScript APIs. They are pretty much the same regarding integration (binding). They are both supported by a number of libraries that could speed up your ...