JavaScript 数组和map实现

借助大佬的思路，map+list实现，觉得用Java有点麻烦，JavaScript30行搞定，开心了！

function LRU( operators ,  k ) {
    // write code here
    var map = new Map();
    var list = [];
    var res = [];
    for(var item in operators){
        var op = operators[item][0];
        if(op===1){
            map.set(operators[item][1],operators[item][2]);
            if(list.length>=k){
                list.shift();
            }
            list.push(operators[item][1]);
        }else if(op===2){
            var key = operators[item][1];
            var index = list.indexOf(key)
            if(index==-1){
                res.push(-1);
            }else{
                res.push(map.get(key));
                list.splice(index,1);
                list.push(key);
            }
        }
    }
    return res
}
module.exports = {
    LRU : LRU
};