JS 实现列表操作 #17

function list() {
    this.dataStore = []; //初始化数组
    this.clear = clear; //清除列表
    this.remove = remove; //移除列表中的元素
    this.find = find; //寻找列表中的元素
    this.length = length; //返回列表的长度
}
function find(element) {
    for (var i = 0, len = this.dataStore.length; i < len; i++) {
        if (this.dataStore[i] === element) {
            return i;
        }
    }
    return -1;
}
function remove(element) {
    for (var i = 0, len = this.dataStore.length; i < len; i++) {
        if (this.dataStore[i] === element) {
            this.dataStore.splice(i, 1);
        }
    }
    return this.dataStore;
}
function length() {
    return this.dataStore.length;
}
function clear() {
    this.dataStore = [];
}