如何合并同一个密钥javascript上的数组？

Question

如何在javascript中合并这两个对象？

h1 = {12: [{actor: 'wayne'}, {actor: 'bill'}], 13: [{actor: 'james'}]}
h2 = {13: [{actor: 'mark'}]}

要得到:

result = {12: [{actor: 'wayne'}, {actor: 'bill'}], 13: [{actor: 'james'}, {actor: 'mark'}]}

基本上我想根据对象的键来连接数组.

Answer 1

你可以这样做:

for (var k in h2) {
   h1[k]=(h1[k]||[]).concat(h2[k]);
}

生成的对象将是h1.

演示(打开控制台)

如果你想保持h1不变,请执行以下操作:

h3 = {};
for (var k in h1) h3[k]=h1[k].slice();
for (var k in h2) h3[k]=(h3[k]||[]).concat(h2[k]);