javascript - 使用下划线js按嵌套数组项拼合数组

Question

我有对象数组，每个对象都有列表，每个嵌套列表包含 1 和 2。

[{
    "name":"a",
    "companies":[1,2]
},
{
    "name":"b",
    "companies":[1,2]
},
{
    "name":"c",
    "companies":[1,2]
}]

我想像这样通过 underscorejs 创建复制列表:

[{
    "name":"a",
    "company":1
},
{
    "name":"a",
    "company":2
},
{
    "name":"b",
    "company":1
},
{ 
    "name":"b",
    "company":2
},
{
    "name":"c",
    "company":1
},
{
    "name":"c",
    "company":2
}]

怎么做到的？

Answer 1

您也可以在没有 underscore.js 的情况下执行此操作。以下为纯js版本:

var data = [{
    "name":"a",
    "companies":[1,2]
},
{
    "name":"b",
    "companies":[1,2]
},
{
    "name":"c",
    "companies":[1,2]
}];

var result = [];
data.forEach(function(item){
  item.companies.forEach(function(company){
    result.push({"name": item.name, "company": company});
  });
});

console.log(result);