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What is the purpose of XORing a register with itself? [duplicate]

...t is more efficient. The opcode is shorter than mov eax, 0, only 2 bytes, and the processor recognizes the special case and treats it as a mov eax, 0 without a false read dependency on eax, so the execution time is the same. ...
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input type=“submit” Vs button tag are they interchangeable?

input type="submit" and button tag are they interchangeable? or if there is any difference then When to use input type="submit" and when button ? ...
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Comparing Java enum members: == or equals()?

I know that Java enums are compiled to classes with private constructors and a bunch of public static members. When comparing two members of a given enum, I've always used .equals() , e.g. ...
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Git ignore file for Xcode projects

...iles, potentially corrupting our live projects. This IMHO is unacceptable, and I've now started logging bugs against it each time they do so. I know they don't care, but maybe it'll shame one of them into treating developers more fairly. If you need to customize, here's a gist you can fork: https...
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Is there a native jQuery function to switch elements?

... I like this option the best! Simple and nicely compatible. Allthough i like to use el1.insertBefore(el2) and el1.insertAfter(el2) for readability. – Maurice Feb 1 '12 at 13:43 ...
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Getting the client's timezone offset in JavaScript

...t); The time-zone offset is the difference, in minutes, between UTC and local time. Note that this means that the offset is positive if the local timezone is behind UTC and negative if it is ahead. For example, if your time zone is UTC+10 (Australian Eastern Standard Time), -600 will be retu...
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Use of Initializers vs Constructors in Java

So I've been brushing up on my Java skills as of late and have found a few bits of functionality that I didn't know about previously. Static and Instance Initializers are two such techniques. ...
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Vertically centering Bootstrap modal window

... This does the job : http://jsfiddle.net/sRmLV/1140/ It uses a helper-div and some custom css. No javascript or jQuery required. HTML (based on Bootstrap's demo-code) <button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">Launch demo modal</button> <!-- ...
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JUnit Testing Exceptions [duplicate]

... it's an unchecked exception. If the exception is checked it won't compile and you will need to use other methods. This link might help. share | improve this answer | follow...
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When should use Readonly and Get only properties

In a .NET application when should I use "ReadOnly" properties and when should I use just "Get". What is the difference between these two. ...