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What does ~~ (“double tilde”) do in Javascript?
...t integers in the SpiderMonkey engine.
You can use it to turn a 1-element array into an integer. Floating-points are converted according to the C rule, ie. truncation of the fractional part.
The second ~ operator then inverts the bits back, so you know that you will have an integer. This is not th...
Convert special characters to HTML in Javascript
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You might consider changing this to remove the array-like access off of str. IE7 and below don't support that, and you can just as easily call charCodeAt right off of str with i as the argument. var iC = str.charCodeAt(i)
– Chase
Jan...
The input is not a valid Base-64 string as it contains a non-base 64 character
...le and sends it to another console application after converting it to Byte array and then to Base64 string. This part works, but when the same stream is received at the application, it gets manipulated and is no longer a valid Base64 string. Some junk characters are getting introduced into the strea...
how to change an element type using jquery
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@Jazzbo's answer returned a jQuery object containing an array of jQuery objects, which wasn't chainable. I've changed it so that it returns an object more similar to what $.each would have returned:
$.fn.changeElementType = function (newType) {
var newElements,
...
How can I quickly sum all numbers in a file?
...se jq:
$ seq 10|jq -s add
55
-s (--slurp) reads the input lines into an array.
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Why are flag enums usually defined with hexadecimal values
... << 30 = GB and so on. It is really nice if you want to make a 16 KB array for a buffer you can just go var buffer = new byte[16 << 10];
– Scott Chamberlain
Nov 6 '12 at 22:04
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Swipe to Delete and the “More” button (like in Mail app on iOS 7)
... you declare the uitableviewdelegate and have the following methods:
-(NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewRowAction *button = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"Button 1" ha...
Copy entire contents of a directory to another using php
...($directory){
if (! is_dir($directory)){ return false; }
$files = array();
$dir = dir($directory);
while (false !== ($file = $dir->read())){
if ($file != '.' and $file != '..') {
if (is_dir($directory . '/' . $file)) { $files[] = hashDirectory($directory . '/...
Optional Parameters in Go?
...ad. ...type is handy for values that you would otherwise have to put in an array before the call.
– user3523091
Jan 30 '16 at 23:36
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How do I compare two DateTime objects in PHP 5.2.8?
... classes are uncomparable, same class - compare properties the same way as arrays (PHP 4), PHP 5 has its own explanation
– Saul
Oct 27 '10 at 11:17
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