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forEach
var fruits = ["Apple", "Banana"];fruits.forEach(function (item, index, array) { console.log(item, index); }); // Apple 0 // Banana 1
filter 是过滤数组，return true false
function isBigEnough(value) { return value >= 10; } var filtered = [12, 5, 8, 130, 44].filter(isBigEnough); // filtered is [12, 130, 44]
pop & shift 都是移除， push & unshift 都是添加
concat 串联可以多个数组一起，或深层串联
var alpha = [‘a‘, ‘b‘, ‘c‘]; var alphaNumeric = alpha.concat(1, [2, 3]); console.log(alphaNumeric); // Result: [‘a‘, ‘b‘, ‘c‘, 1, 2, 3]
every 每一个结果都是true 就返回true
some 是其中一个结果true 就返回true
function isBigEnough(element, index, array) { return element >= 10; } [12, 5, 8, 130, 44].every(isBigEnough); // false [12, 54, 18, 130, 44].every(isBigEnough); // true
lastIndexOf 可以找在数组中的位置，或确定指定位置有没有要找的对象同时同步资料
var array = [2, 5, 9, 2]; array.lastIndexOf(2); // 3 array.lastIndexOf(7); // -1 array.lastIndexOf(2, 3); // 3 array.lastIndexOf(2, 2); // 0 array.lastIndexOf(2, -2); // 0 array.lastIndexOf(2, -1); // 3
reduce 拿到现在的对象和之后的对象来做事
reduceRight 是右到左
var total = [0, 1, 2, 3].reduce(function(a, b) { return a + b; },10); // total == 16
reverse就是调转对象顺序
var myArray = [‘one‘, ‘two‘, ‘three‘]; myArray.reverse(); console.log(myArray) // [‘three‘, ‘two‘, ‘one‘]
sort 排列，依据ASCII的排列，所以号码大小不会是顺序
slice 可以找到第几个位置，决定要移除几个，在决定要添加几个
var myFish = [‘angel‘, ‘clown‘, ‘mandarin‘, ‘surgeon‘]; // removes 0 elements from index 2, and inserts ‘drum‘ var removed = myFish.splice(2, 0, ‘drum‘); // myFish is [‘angel‘, ‘clown‘, ‘drum‘, ‘mandarin‘, ‘surgeon‘] // removed is [], no elements removed // removes 1 element from index 3 removed = myFish.splice(3, 1); // myFish is [‘angel‘, ‘clown‘, ‘drum‘, ‘surgeon‘] // removed is [‘mandarin‘] // removes 1 element from index 2, and inserts ‘trumpet‘ removed = myFish.splice(2, 1, ‘trumpet‘); // myFish is [‘angel‘, ‘clown‘, ‘trumpet‘, ‘surgeon‘] // removed is [‘drum‘] // removes 2 elements from index 0, and inserts ‘parrot‘, ‘anemone‘ and ‘blue‘ removed = myFish.splice(0, 2, ‘parrot‘, ‘anemone‘, ‘blue‘); // myFish is [‘parrot‘, ‘anemone‘, ‘blue‘, ‘trumpet‘, ‘surgeon‘] // removed is [‘angel‘, ‘clown‘]
toLocaleString 是把对象中的字全转成string
var number = 1337; var date = new Date(); var myArr = [number, date, ‘foo‘]; var str = myArr.toLocaleString(); console.log(str); // logs ‘1337,6.12.2013 19:37:35,foo‘
toString 转成可显示的string
var monthNames = [‘Jan‘, ‘Feb‘, ‘Mar‘, ‘Apr‘]; var myVar = monthNames.toString(); // assigns ‘Jan,Feb,Mar,Apr‘ to myVar.
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原文地址：http://www.cnblogs.com/stooges/p/4931089.html
