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What is memory fragmentation?

... symptom of memory fragmentation is that you try to allocate a large block and you can't, even though you appear to have enough memory free. Another possible consequence is the inability of the process to release memory back to the OS (because each of the large blocks it has allocated from the OS, f...
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Sorting an array of objects by property values

I've got the following objects using AJAX and stored them in an array: 30 Answers 30 ...
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Count all occurrences of a string in lots of files with grep

... doesn't work if you want to search in subdirectories too, whereas grep -o and wc -l does. cat is quicker in cases like the original question though. – Leagsaidh Gordon Jan 3 '13 at 15:37 ...
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deny directory listing with htaccess

I have a folder, for example : /public_html/Davood/ and too many sub folder in folder, for example : /public_html/Davood/Test1/ , /public_html/Davood/Test1/Test/ , /public_html/Davood/Test2/ , ... ...
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How to 'minify' Javascript code

JQuery has two versions for download, one is Production (19KB, Minified and Gzipped) , and the other is Development (120KB, Uncompressed Code) . ...
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Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C

... trade off memory for speed (assuming your L1 Data Cache is large enough), and reverse 16 bits at a time with a 64K-entry lookup table. Others Simple unsigned int v; // input bits to be reversed unsigned int r = v & 1; // r will be reversed bits of v; first get LSB of v int s = sizeof(v...
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How can I shuffle the lines of a text file on the Unix command line or in a shell script?

I want to shuffle the lines of a text file randomly and create a new file. The file may have several thousands of lines. 19...
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What is the difference between a string and a byte string?

I am working with a library which returns a byte string and I need to convert this to a string. 7 Answers ...
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Can I set variables to undefined or pass undefined as an argument?

I’m a bit confused about JavaScript’s undefined and null values. 10 Answers 10...
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CSS3 Transparency + Gradient

RGBA is extremely fun, and so is -webkit-gradient , -moz-gradient , and uh... progid:DXImageTransform.Microsoft.gradient ... yeah. :) ...