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Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?

... a matrix of size 2^n is slower than transposing one of size 2^n+1 . For small values of n , the difference is not major. ...
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Panel.Dock Fill ignoring other Panel.Dock setting

...utline) gives a useful tree-view over the control hierarchy and order, and allows you to change the sibling order of controls. You can also change sibling order directly in the designer by context menu -> Bring to front / Send to back, which moves the control to be first or last of the siblings....
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Android accelerometer accuracy (Inertial navigation)

... It's quite different to the old manually-take-some-pictures-then-stitch-them-later job. It does track its position in real time somehow. It's a little difficult to explain without demonstrating it. You don't have to take pictures manually - the phone decides...
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How to select where ID in Array Rails ActiveRecord without exception

... If it is just avoiding the exception you are worried about, the "find_all_by.." family of functions works without throwing exceptions. Comment.find_all_by_id([2, 3, 5]) will work even if some of the ids don't exist. This works in the user.comments.find_all_by_id(potentially_nonexistent_id...
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Android Shared preferences for creating one time activity (example) [closed]

... apply() is asynchronous call to perform disk I/O where as commit() is synchronous. So avoid calling commit() from the UI thread. – Aniket Thakur Nov 10 '15 at 8:55 ...
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How do you get a timestamp in JavaScript?

...nd it returns the timestamp (without any alteration). Details: On almost all current browsers you can use Date.now() to get the UTC timestamp in milliseconds; a notable exception to this is IE8 and earlier (see compatibility table). You can easily make a shim for this, though: if (!Date.now) { ...
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Overwrite or override

...ority to reject or cancel (a decision, view, etc.) – allicarn Nov 15 '12 at 19:50 add a comme...
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Can I tell the Chrome script debugger to ignore jquery.js?

...?) to not break within certain files? To assume they're not broken, essentially? This seems like something they might build in. ...
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How do I seed a random class to avoid getting duplicate random values [duplicate]

... be far from uniform distribution. For the sake of completeness, if you really need to reseed a Random, you'll create a new instance of Random with the new seed: rnd = new Random(newSeed); share | ...
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How can I disable a button in a jQuery dialog from a function?

...tinue" button. I would like this "continue" button to only be enabled once all the fields have content in them, else it will remain disabled. ...