This is the reference point. All the other options are based off this.
|-- app
| |-- controllers
| | |-- admin
/** | |
** 加法函数,用来得到精确的加法结果 | |
** 说明:javascript的加法结果会有误差,在两个浮点数相加的时候会比较明显。这个函数返回较为精确的加法结果。 | |
** 调用:accAdd(arg1,arg2) | |
** 返回值:arg1加上arg2的精确结果 | |
**/ | |
function accAdd(arg1, arg2) { | |
var r1, r2, m, c; | |
try { | |
r1 = arg1.toString().split(".")[1].length; |
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.
elem.offsetLeft
, elem.offsetTop
, elem.offsetWidth
, elem.offsetHeight
, elem.offsetParent