截取:
array.silce(satar,end);
var a = [1,2,3];
var b = a.silce(1,2);
连接:
var a = [1,2];
var b =[3];
var c = a.concat(b);
截取:
array.silce(satar,end);
var a = [1,2,3];
var b = a.silce(1,2);
连接:
var a = [1,2];
var b =[3];
var c = a.concat(b);