layout | date | title |
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post |
2014-11-09 14:41:06 +0800 |
length==+length |
读 underscroe 源码的时候看到了
var length = obj.length;
<!doctype html> | |
<html lang="en"> | |
<head> | |
<title>JavaScript Patterns</title> | |
<meta charset="utf-8"> | |
</head> | |
<body> | |
<script> | |
/* Title: Inheritance by Copying Properties | |
Description: an object gets functionality from another object, simply by copying it |
var a = 1; | |
var b = ++a; // b = 2, a = 2; | |
a = 1; | |
b = a++; // b = 1; a = 2; | |
function deepCopy() (parent, child) { | |
var i, | |
toStr = Object.propotype.toString, | |
// x: arrName = '[Object Array]'; |
<!DOCTYPE html> | |
<html> | |
<head lang="en"> | |
<meta charset="UTF-8"> | |
<title> | |
</title> | |
</head> | |
<body> | |
<h1 id='number'>1</h1> |
layout | date | title |
---|---|---|
post |
2014-11-09 14:41:06 +0800 |
length==+length |
读 underscroe 源码的时候看到了
var length = obj.length;
#!/bin/bash | |
ls ../demo | awk 'BEGIN{ print "[" } {split($0,item,"_"); print "{\"url\":\"/demos\/"$0"\", \"name\":\""item[1]"\" ,\"tags\":\""item[2]"\",\"desc\":\""item[3]"\"}"} END{ print "{\"url\":\"\"} ]" }' > ../_data/demos.json |
<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset=utf-8> | |
<script src="../lib/jquery.js"></script> | |
<script src="../lib/seedrandom.js"></script> | |
<script type="text/javascript" charset="utf-8"> | |
if (typeof Object.create !== "function") |
1. 我不希望每次做完一个个新功能的时候,再手动地去测试一个个功能。(自动化测试) | |
2. 我不希望在重构的时候发现破坏了原来的功能,而我还一无所知。 | |
3. 我不敢push代码,因为我没有把握。 |
var mergeTo = [4,5,6]; | |
var mergeFrom = [7,8,9]; | |
Array.prototype.push.apply(mergeTo, mergeFrom); | |
mergeTo; // is: [4, 5, 6, 7, 8, 9] |
<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<meta name="viewport" content="width=device-width"> | |
<title>JS Bin</title> | |
</head> | |
<body> | |
<script id="jsbin-javascript"> |
function splat(fn) { | |
return function(array) { | |
// 充分利用了 apply 拆分数组的特性 | |
return fn.apply(null, array); | |
}; | |
} | |
// 传入一个函数,返回另外一个函数 | |
var func = splat(function(x, y) { | |
return x + y; |