[微信小程序]数组合并 [你这样说，我理解不了。]
[微信小程序]数组合并 [你这样说，我理解不了。]
源代码：
var j1 = [
{
"cinema_movie_id": 1,
"cinema_id": "1",
"num": 3
},
{
"cinema_movie_id": 2,
"cinema_id": "0",
"pric":"40"
},
{
"cinema_movie_id": 2,
"cinema_id": "0",
"num": 6
}
]
var jmap = {};
var result = [];
j1.forEach(function (al) {
var key = al.cinema_movie_id + '_' + al.cinema_id;
if (typeof jmap[key] === 'undefined') {
jmap[key] = [];
}
jmap[key].push(al);
})
var keys = Object.keys(jmap);
for (var i = 0; i < keys.length; i++) {
var rs = keys[i].split('_');
result.push({
cinema_movie_id: rs[0],
cinema_id: rs[1],
value: jmap[keys[i]]
});
}
怎么把这两个合并在一块？已经通过cinema_id分好组了，然后把相同的cinema_id合并在一块
-
j1.forEach(function (al) { var key = al.cinema_movie_id + '_' + al.cinema_id; jmap[key] = jmap[key] ? { ...jmap[key], ...al } : al; }) , 说的貌似很有深意，你能一条一条说么？