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Why do we use Base64?
... your choice (for example UTF-8) and then afterwards Base64 encode the resulting binary data into a text string that is safe to send encoded as ASCII. The receiver will have to reverse this process to recover the original message. This of course requires that the receiver knows which encodings were ...
What is the “assert” function?
...elopment, and when the
final product ships there is no
performance penalty nor increase in
the size of the executable version of
the program.
Eg
#include <stdio.h>
#include <assert.h>
void analyze (char *, int);
int main(void)
{
char *string = "ABC";
int length = 3;
...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
...the registers to the variables.
In your case, the speeds are a direct result of what is stuck to the (false) dependency chain depending on what the register allocator decided to do.
13 GB/s has a chain: popcnt-add-popcnt-popcnt → next iteration
15 GB/s has a chain: popcnt-add-popcnt-add → nex...
Efficient way to insert a number into a sorted array of numbers?
...Script array, and want to insert one more item into the array such the resulting array remains sorted. I could certainly implement a simple quicksort-style insertion function:
...
What's the difference between deque and list STL containers?
...che for CPU pointers on GPU memory. Nods to the Linux O(1) scheduler (LRU <-> run queue per processor). The unordered_map has constant time access via hash table.
#include <iostream>
#include <list>
#include <unordered_map>
using namespace std;
struct MapEntry {
list...
CSS Box Shadow Bottom Only [duplicate]
...4px rgba(0, 0, 0, 0.4);
box-shadow: 0 4px 4px rgba(0, 0, 0, 0.4);
}
Alternatively, float the outer element to cause it to shrink to the size of the inner element. See: http://jsfiddle.net/QJPd5/1/
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PHP Regex to get youtube video ID?
...y overwrite an existing variable.
Putting everything together, we have:
<?php
$url = "http://www.youtube.com/watch?v=C4kxS1ksqtw&feature=relate";
parse_str( parse_url( $url, PHP_URL_QUERY ), $my_array_of_vars );
echo $my_array_of_vars['v'];
// Output: C4kxS1ksqtw
?>
Working exam...
Find closing HTML tag in Sublime Text
...o-to-pair/
Shortcut (Mac): Shift + Control + T
Shortcut (PC): Control + Alt + J
https://github.com/sergeche/emmet-sublime#available-actions
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How do I set the rounded corner radius of a color drawable using xml?
...
Use the <shape> tag to create a drawable in XML with rounded corners. (You can do other stuff with the shape tag like define a color gradient as well).
Here's a copy of a XML file I'm using in one of my apps to create a drawabl...