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js代码
// 第一种
var mergeTo = [4,5,6],
mergeFrom = [7,8,9];
mergeTo = mergeTo.concat(mergeFrom);
mergeTo; // is: [4, 5, 6, 7, 8, 9]
//or
var a = [1,2], b = [3,4], c = a.concat(b);
// 第二种
var mergeTo = [4,5,6],
var mergeFrom = [7,8,9];
Array.prototype.push.apply(mergeTo, mergeFrom);
mergeTo; // is: [4, 5, 6, 7, 8, 9]