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Most efficient way to create a zero filled JavaScript array?
...second parameter of Array.from.
In the example above, the first parameter allocates an array of 3 positions filled with the value undefined and then the lambda function maps each one of them to the value 0.
Although Array(len).fill(0) is shorter, it doesn't work if you need to fill the array by do...
appending array to FormData and send via AJAX
...
You have several options:
Convert it to a JSON string, then parse it in PHP (recommended)
JS
var json_arr = JSON.stringify(arr);
PHP
$arr = json_decode($_POST['arr']);
Or use @Curios's method
Sending an array via FormData.
Not recommended: Serialize the data with, then deserialize in PHP
JS
/...
Javascript swap array elements
...sion is likely inefficient as it is generating a new and unnecessary array allocation.
– Chris_F
Jul 12 at 23:53
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javascript function leading bang ! syntax
...ion(){console.log("cheese")}(); you get an error: "SyntaxError: Unexpected token !"
– heavysixer
Feb 2 '13 at 17:33
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Is it considered acceptable to not call Dispose() on a TPL Task object?
...l you're doing is using
continuations, that event handle will
never be allocated
...
it's likely better to rely on finalization to take care of things.
Update (Oct 2012)
Stephen Toub has posted a blog titled Do I need to dispose of Tasks? which gives some more detail, and explains the impr...
What are the mechanics of short string optimization in libc++?
... minus 2 bytes to store a short string (i.e. largest capacity() without an allocation).
On a 32 bit machine, 10 chars will fit in the short string. sizeof(string) is 12.
On a 64 bit machine, 22 chars will fit in the short string. sizeof(string) is 24.
A major design goal was to minimize sizeof(...
How to upper case every first letter of word in a string? [duplicate]
...s can be improved a bit. The length of the string is known, so you can pre-allocate the StringBuilder's length. Since you are going to call StringBuilder.append anyway, don't bother creating a new char[] and String in each loop iteration: just append the capitalized letter, then the rest of the word...
Recommendation for compressing JPG files with ImageMagick
...
Just saying for those who using Imagick class in PHP:
$im -> gaussianBlurImage(0.8, 10); //blur
$im -> setImageCompressionQuality(85); //set compress quality to 85
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Static constant string (class member)
...lation unit only
const char A::RECTANGLE[] = "rectangle";
There! No heap allocation, no copying, no dynamic initialization.
Cheers, s.
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What does $1 [QSA,L] mean in my .htaccess file?
...)$ (matches any URL except the server root), it will be rewritten as index.php?url=$1 which means a request for ollewill be rewritten as index.php?url=olle).
QSA means that if there's a query string passed with the original URL, it will be appended to the rewrite (olle?p=1 will be rewritten as inde...