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Which selector do I need to select an option by its text?
...e in jQuery 1.7.2 because I'm trying to set the selected index of the list based on the value from a textbox, and some text values are contained in multiple options. I ended up using the following:
$('#mySelect option:contains(' + value + ')').each(function(){
if ($(this).text() == value) {
...
How does Bluebird's util.toFastProperties function make an object's properties “fast”?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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What's the shebang/hashbang (#!) in Facebook and new Twitter URLs for?
... is very easy and automatic, the same site is in the same time SPI or page based for SEO (or when JavaScript is disabled for accessibility). With other web frameworks you can ever follow the double site approach, one site is SPI based and another page based for SEO, for instance Twitter uses this "d...
How do I check if a number evaluates to infinity?
...
Because IEEE 64bit floats have 53 significant binary digits (see en.wikipedia.org/wiki/IEEE_754 ), so n+1 cannot be represented and is subject to rounding. Well, even integers are affected by rounding errors. Btw, I don't think that your ...
内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...glibc malloc版本。
ptmalloc原理
系统调用接口
上图是 x86_64 下 Linux 进程的默认地址空间, 对 heap 的操作, 操作系统提供了brk()系统调用，设置了Heap的上边界； 对 mmap 映射区域的操作,操作系 统 供了 mmap()和 munmap()函数。
因为系统...
How to initialize all members of an array to the same value?
...VAL_16X VAL_8X, VAL_8X
#define VAL_32X VAL_16X, VAL_16X
#define VAL_64X VAL_32X, VAL_32X
int myArray[53] = { VAL_32X, VAL_16X, VAL_4X, VAL_1X };
If you need to change the value, you have to do the replacement at only one place.
Edit: possible useful extensions
(courtesy of Jonathan Le...
Multiple variables in a 'with' statement?
...red Jun 20 '18 at 23:32
nyanpasu64nyanpasu64
1,71711 gold badge1515 silver badges2626 bronze badges
...
Create array of all integers between two numbers, inclusive, in Javascript/jQuery [duplicate]
...rr = [],
c = highEnd - lowEnd + 1;
while ( c-- ) {
arr[c] = highEnd--
}
Demo
http://jsfiddle.net/W3CUn/
FOR THE DOWNVOTERS
performance
http://jsperf.com/for-push-while-set/2
faster in ie and 3x faster in firefox
only on aipad air the for loop is a little faster.
tested on win8, osx10.8, u...
Warn user before leaving web page with unsaved changes
...rary for all of this. jQuery's Are You Sure? plugin works great, see their demo page. It's as simple as this:
<script src="jquery.are-you-sure.js"></script>
<script>
$(function() {
$('#myForm').areYouSure(
{
message: 'It looks like you have been editing someth...
Pagination on a list using ng-repeat
...
Hi, this demo came so handy for a project I got involved. I needed to add the option to view all, or toggle pagination as well as show each page. So I extended the demo. thanks a lot. jsfiddle.net/juanmendez/m4dn2xrv
...