標籤：ever 倒序 字元 ons meta ring 添加 進階 length
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title></title></head><body><script> //為內建對象添加原型方法 //執行個體中的方法如果沒有，就去建立該執行個體對象的建構函式的原型對象中找 //在字串中添加一個倒序字串的方法 String.prototype.myReverse = function () { for (var i = this.length - 1; i >= 0; i--) { console.log(this[i]); } }; var str = "abcd"; str.myReverse(); //為Array內建對象的原型對象中添加方法 Array.prototype.mySort = function () { for (var i = 1; i < this.length; i++) { for (var j = 0; j < this.length - i; j++) { if (this[j] > this[j + 1]) { var temp = this[j]; this[j] = this[j + 1]; this[j + 1] = temp; } } } }; var arr = [100, 10, 200, 30, 20, 1]; arr.mySort(); console.log(arr);</script></body></html>
JS進階----------------->內建對象添加原型的方法
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