js删除数组指定元素

删除数组指定元素，即可通过先查找出这个指定元素在数组中的索引，再通过索引删除；
so,

//查找指定元素的索引
function arrIndex(val,arr){
    for (var i = 0; i < arr.length; i++) { 
        if (arr[i] == val) return i; 
    } 
    return -1;
}
//删除索引元素
function removeCurEle(val,arr){
    var index = arrIndex(val,arr); 
    if (index > -1) { 
        arr.splice(index, 1); 
    }
}
//测试一下
var testArr = ['a','b','c','d','e','f','g'];
removeCurEle('c',testArr);
console.log(testArr);//["a", "b", "d", "e", "f", "g"]

亦或者直接给数组的对象加上这两个方法

Array.prototype.arrIndex = function(val) { 
    for (var i = 0; i < this.length; i++) { 
        if (this[i] == val) return i; 
    } 
    return -1; 
};
Array.prototype.removeCurEle = function(val) { 
    var index = this.arrIndex(val);
        if (index > -1) { 
        this.splice(index, 1);
    } 
};
var testArr2 = ['a','b','c','d','e','f','g'];
testArr2.removeCurEle('b');
console.log(testArr2);//["a", "c", "d", "e", "f", "g"]