JsforEachOnIE

JsforEachOnIE

forEach(fn(), thisValue)

in IE
alert(Array.prototype.forEach);  //undefind

Array.forEach implementation for IE support

為了解決在IE無法正常工作的forEach, 所以手動添加在此作為紀錄!

if (!Array.prototype.forEach){
Array.prototype.forEach = function(callback, thisArg){
var T, k;
if (this ==null){
    throw new TypeError("NULL or undefined");
}
var O = Object(this);
var len = O.length >>>0; //將O.length 轉為UInt32編碼
if({}.toString.call(callback) != "[object Function]") {
  throw new TypeErroe(callback +"IS NOT A FUNCTION");
}
if (thisArg){
  T = thisArg
}
k =0;
while (k< len){
  var kValue;
  if (k in O){
    kValue = O[k];
    callback.call(T,kValue,k,O);
  }
  K++;
}
}
}

參考資料: MDN,Oscar's MSDN