//合并数组,谁在左谁在前面
var a = [1,2,3];
var b = [4,5,6];
// alert(a.concat(b));
alert(b.concat(a));
var arr = [1,2,3,4,5,6];
alert(arr.join('$'));
//合并数组,谁在左谁在前面
var a = [1,2,3];
var b = [4,5,6];
// alert(a.concat(b));
alert(b.concat(a));
var arr = [1,2,3,4,5,6];
alert(arr.join('$'));
本文标题:数组concat以及join的理解
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