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Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
I am doing some numerical optimization on a scientific 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 ...
Which characters make a URL invalid?
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Here's a regex that will determine if the entire string contains only the characters above: /^[!#$&-;=?-[]_a-z~]+$/
– Leif Wickland
Oct 7 '11 at 17:01
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How do I view an older version of an SVN file?
I have an SVN file which is now missing some logic and so I need to go back about 40 revisions to the time when it had the logic I need. Other than trying to view a diff of the file in the command line ( very hard to read ), is there any way I could get a copy of that file to review so I can study i...
JavaScript naming conventions [closed]
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I think he is doing fine with the link. If you are so concerned you should edit the post.
– nckbrz
Dec 12 '14 at 13:21
4
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What is the 'override' keyword in C++ used for? [duplicate]
...o the parent class/interface) is removed (not alternated). This is useful if the subclass is expecting a callback but it will never happen due to the library change, etc.
– Hei
Mar 11 '18 at 5:32
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Calculate distance between two latitude-longitude points? (Haversine formula)
...g. I added the call to convert the deltas to radians and it works properly now. I submitted an edit and am waiting for it to be peer reviewed.
– Bryan Bedard
Dec 4 '11 at 4:53
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Is there a performance gain in using single quotes vs double quotes in ruby?
Do you know if using double quotes instead of single quotes in ruby decreases performance in any meaningful way in ruby 1.8 and 1.9.
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JavaScript post request like a form submit
I'm trying to direct a browser to a different page. If I wanted a GET request, I might say
31 Answers
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How to get the current time in milliseconds from C in Linux?
...ed obsolete. This means it may be removed from a future version of the specification. Application writers are encouraged to use the clock_gettime function instead of gettimeofday.
Here is an example of how to use clock_gettime:
#define _POSIX_C_SOURCE 200809L
#include <inttypes.h>
#include ...
Javascript - sort array based on another array
...{
var found = false;
items = items.filter(function(item) {
if(!found && item[1] == key) {
result.push(item);
found = true;
return false;
} else
return true;
})
})
result.forEach(function(item) {
document.writel...