1.[{limit:20},{offset:0}]

        var http = "https://192.168.4.18?limit=20&offset=0"
        //[{limit:20},{offset:0}]
        var arr = http.split("?")[1].split("&");
        //["limit=20", "offset=0"]
        var res = arr.map(item=>{
            var obj = {};
            obj[item.split("=")[0]] = item.split("=")[1];
            //item = [limit,20]
            return obj;
        })
        console.log(res)

2.{limit:20,offset:0}

         var http = "https://192.168.4.18?limit=20&offset=0"
        //{limit:20,offset:0}
        var arr = http.split("?")[1].split("&");  //[limit=20,offset=0]
        var obj = {};
        var res = arr.map(item=>{
            // item =  [limit,20]
            obj[item.split("=")[0]] = item.split("=")[1];
        })
        console.log(obj)

3.颠倒

        var arr = "hello world";
        var str = arr.split("").reverse().join("");
        console.log(str)

4.去重

        var arr = [1,2,1,4,5,6,4];
        var result = [];
        arr.forEach(item=>{
            if(!result.includes(item)){
                result.push(item)
            }
        })
        console.log(result)

        var arr = [1,2,3,2,4,4,5]
        var s = new Set(arr)
        console.log([...s])  展开