<!doctype html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<script>
var array = (function() {
return {
/*
* 功能：数组判断
* 来源：http://sofish.de/1591
*/
isArray: function(obj) {
return Object.prototype.toString.call(obj) === '[object Array]'
}, /*
* 功能：包含判断
* 来源：https://github.com/lifesinger/lifesinger.github.com/issues/113
*/
indexOf : [].indexOf ?
function(arr, item) {
return arr.indexOf(item)
} :
function(arr, item) {
var i
var len = arr.length for (i = 0; i < len; i++) {
if (arr[i] === item) {
return i
}
} return -1
}, /*
* 功能：数组去重
* 来源：https://github.com/lifesinger/lifesinger.github.com/issues/113
*/
unique: function(arr) {
var i
var len = arr.length
var item
var ret = []
var that = this for (i = 0; i < len; i++) {
item = arr[i]
if (that.indexOf(ret, item) === -1) {
ret.push(item)
}
} return ret
}
}
})()
</script>
<script>
console.log(array.isArray([]))
console.log(array.indexOf([1, 2, 3], 4))
console.log(array.unique([1, 2, 3, 1]))
</script>
</body>
</html>