let data = [
                {name: 'nowcoder1'},
                {name: 'nowcoder2'}
            ],
            l=data.length;
            
            const _api = string => {
                // 补全代码
                const s = string.split("?");
                if(s[0] == 'get') {
                    return data;
                } else if(s[0] == "update") {
                    //[xxx,yyy]            [n=x,t=y]             [[n,x],[t,y]]  [x,y]
                    const [from,to] = s[1].split("&").map(str => str.split("=").pop());
                    for(let i = 0; i < l;i++) {
                        if(data[i].name == from) {
                            data[i].name = to;
                        }
                    }
                }
            }