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Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
...application. One thing I noticed is that GCC will optimize the call pow(a,2) by compiling it into a*a , but the call pow(a,6) is not optimized and will actually call the library function pow , which greatly slows down the performance. (In contrast, Intel C++ Compiler , executable icc , will ...
Multiple Updates in MySQL
... DUPLICATE KEY UPDATE.
Using your example:
INSERT INTO table (id,Col1,Col2) VALUES (1,1,1),(2,2,3),(3,9,3),(4,10,12)
ON DUPLICATE KEY UPDATE Col1=VALUES(Col1),Col2=VALUES(Col2);
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How to set a Header field on POST a form?
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edited Mar 1 '12 at 13:29
answered Mar 1 '12 at 13:20
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Default function arguments in Rust
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edited Mar 24 '19 at 21:20
answered Jun 5 '14 at 0:06
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Using SSH keys inside docker container
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answered Feb 8 '17 at 22:57
Daniel van FlymenDaniel van Flymen
7,88733 gold badges1919 silver badges3232 bronze badges
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How to know which version of Symfony I have?
I know that I have downloaded a Symfony2 project and started with but I have updated my vendor several times and I want to know which version of symfony I have
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What is a pre-revprop-change hook in SVN, and how do I create it?
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Basically it's a script that is launched before unversioned property is modified on the reposito...