[{
manufacturer: "Dangerous Game",
site: {siteId: 1, capacity: 0.42}
},
{
manufacturer: "Game",
site: {siteId: 2, capacity: 0.42}
}]

请问如何将如上数组展开成下面这样，而且刚开始不知道上面数组的长度

[{
manufacturer: "Dangerous Game",
siteId: 1, 
capacity: 0.42
},
{
manufacturer: "Game",
siteId: 2, 
capacity: 0.42
}]

[{
manufacturer: "Dangerous Game",
site: {siteId: 1, capacity: 0.42}
},
{
manufacturer: "Game",
site: {siteId: 2, capacity: 0.42}
}].map(v => ({
  manufacturer: v.manufacturer,
    ...v.site
}))