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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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ActionController::InvalidAuthenticityToken
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I had the same issue but with pages which were page cached. Pages got buffered with a stale authenticity token and all actions using the methods post/put/delete where recognized as forgery attempts. Error (422 Unprocessable Entity) was returned to the...
Why does struct alignment depend on whether a field type is primitive or user-defined?
...any) structs of Noda Time, which has in turn led me to uncover a slight oddity in the CLR's alignment decision.
4 Answers
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How to install a previous exact version of a NPM package?
I used nvm to download node v0.4.10 and installed npm to work with that version of node.
10 Answers
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Padding is invalid and cannot be removed?
...lation to my program but can't seem to find a solution or the reason why it's happening to my specific program. I have been using the example provided my msdn for encrypting and decrypting an XmlDocument using the Rijndael algorithm. The encryption works fine but when I try to decrypt, I get the f...
How to get a subset of a javascript object's properties
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edited Oct 23 '18 at 16:08
ruffin
12.5k77 gold badges6767 silver badges114114 bronze badges
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Set a default parameter value for a JavaScript function
...lue isn't defined (and ignored if the value is passed). In Ruby you can do it like this:
27 Answers
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std::cin input with spaces?
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edited Feb 11 '15 at 18:14
answered Apr 30 '11 at 0:52
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scale Image in an UIButton to AspectFit?
I want to add an image to a UIButton, and also want to scale my image to fit with the UIButton (make image smaller). Please show me how to do it.
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What are the differences between ArrayList and Vector?
... we must externally synchronize the block of code which modifies the list either structurally or simply modifies an element. Structural modification means addition or deletion of element(s) from the list. Setting the value of an existing element is not a structural modification.
Collections.synchro...