合并键匹配的对象

Question

我是 typescript 或 node.js 的新手，我正在尝试组合以下 JSON 数组注意：不确定客户端是否允许任何新的依赖项或插件这可以在不使用下划线或 jquery extend

的情况下实现吗

[ { parentauthscopekey: 1, childauthscopekey: 2 },
  { parentauthscopekey: 12, childauthscopekey: 10 },
  { parentauthscopekey: 12, childauthscopekey: 11 },
  { parentauthscopekey: 13, childauthscopekey: 1 } ]

到

[ { parentauthscopekey: 1, childauthscopekey: [ 2, 1 ] },
  { parentauthscopekey: 12, childauthscopekey: [ 10, 11, 12 ] },
  { parentauthscopekey: 13, childauthscopekey: [ 1, 13 ] } ]

尝试了下面的代码，它只是行数太多但可以完成工作，但希望在不使用硬编码范围和 scopeMap 值的情况下得到一些简单的东西

 table = [ { parentauthscopekey: 1, childauthscopekey: 2 },
  { parentauthscopekey: 12, childauthscopekey: 10 },
  { parentauthscopekey: 12, childauthscopekey: 11 },
  { parentauthscopekey: 13, childauthscopekey: 1 } ]
   
    scope=[1,12,13]
    scopeMap = new Set()

    table2 = []
    scope.forEach(parentauthscopekey => {
        table.forEach(row =>{
            if(row.parentauthscopekey == parentauthscopekey && !scopeMap.has(parentauthscopekey))
            {
                scopeMap.add(parentauthscopekey)
                childauthscopekey = []
                table.filter(c => c.parentauthscopekey == row.parentauthscopekey).forEach(r=>{
                    childauthscopekey.push(r.childauthscopekey)
                })
                childauthscopekey.push(parentauthscopekey)
                table2.push({parentauthscopekey, childauthscopekey})
            }
        })
    })
    console.log(table2)

Answer 1

你可以:

使用array.reduce构建预期结构
恢复或每个条目与 array.filter
并将当前的 parentauthscopekey 添加到 childauthscopekey

var data = [ { parentauthscopekey: 1, childauthscopekey: 2 },
  { parentauthscopekey: 12, childauthscopekey: 10 },
  { parentauthscopekey: 12, childauthscopekey: 11 },
  { parentauthscopekey: 13, childauthscopekey: 1 } ];
  
var result = data.reduce((acc, current) => {
    if (!acc.some(one => one.parentauthscopekey === current.parentauthscopekey)) {
      var childs = data.filter(one => one.parentauthscopekey === current.parentauthscopekey).map(one => one.childauthscopekey);
      childs.push(current.parentauthscopekey);
      acc.push({
        parentauthscopekey: current.parentauthscopekey,
        childauthscopekey: childs
      })
    }
  return acc;
}, []);

console.log(result);

合并键匹配的对象

Merge object where key is matching

javascript

arrays

json

array-merge