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Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
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I'm not AMD or speaking for them, but I would have done it the same way. Because zeroing the high half doesn't create a dependency on the previous value, that the CPU would have to wait on. The register renaming mechanism would essentially be defeated if it wasn't done that way.
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Checking if a variable is not nil and not zero in ruby
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edited Jul 18 '11 at 9:45
answered Oct 31 '08 at 0:36
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Make child visible outside an overflow:hidden parent
In CSS the overflow:hidden is set on parent containers in order to allow it to expand with the height of their floating children.
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How and why does 'a'['toUpperCase']() in JavaScript work?
...t came across some code which I did not understood at first. So I debugged it and came to this finding:
12 Answers
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Android - How To Override the “Back” button so it doesn't Finish() my Activity?
I currently have an Activity that when it gets displayed a Notification will also get displayed in the Notification bar.
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Variable's scope in a switch case [duplicate]
I think I don't understand how the scope works in a switch case.
7 Answers
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What is a loop invariant?
I'm reading "Introduction to Algorithm" by CLRS. In chapter 2, the authors mention "loop invariants". What is a loop invariant?
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Checking if a list is empty with LINQ
What's the "best" (taking both speed and readability into account) way to determine if a list is empty? Even if the list is of type IEnumerable<T> and doesn't have a Count property.
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Check if Internet Connection Exists with Javascript? [duplicate]
...s an internet connection using Javascript? That way I could have some conditionals saying "use the google cached version of JQuery during production, use either that or a local version during development, depending on the internet connection".
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How do I push a local repo to Bitbucket using SourceTree without creating a repo on bitbucket first?
Is there a way to import my local git repos to SourceTree and push them to my Bitbucket account, having new repos identical to my local repos be created on my account? Or do I have to make a repo online first and push to that? Github has a way to publish your local repos directly from it's client, a...