Array.prototype.removeBeginWithVal（删除数组内以某值开头的字符串对象）

Array扩展方法：

//author: Kenmu
//created time: 2015-03-16
//function: 删除数组内以某值开头的字符串对象
Array.prototype.removeBeginWithVal = function (val) {
    for(var i=0, len = this.length; i < len; i++) {
        if(this[i].indexOf(val) != -1) {
            this.splice(i, 1);
            break;
        }
    }
}; 

调用方式：

var arr =["Kenmu", "DemandTypeStringCode"];
arr.removeBeginWithVal("DemandTypeStringCode"); //arr.length=1 after the operation of removeBeginWithVal