问更有效和更短的JS代码？

EN

const scenes = {
  'Node1': {
    'scene1': [
      {
        nodeKey: 'cccc',
        category: 'user',
      },
      {
        nodeKey: 'eeee',
        category: 'interface',
      },
    ]
  },
}

let result = {
  'Node1': {
    'scene1': {
      'cccc': {
        nodeKey: 'cccc',
        category: 'user',
      }
    }
  }
}

function makeNewStructure(scenes) {
  return Object.keys(scenes).reduce((prevNode, currentNode) => ({
      ...prevNode, 
      [currentNode]: Object.keys(scenes[currentNode]).reduce((prevScene, currentScene) => ({
        ...prevScene, 
        [currentScene]: scenes[currentNode][currentScene].reduce((previous, current) => ({
            ...previous,
            [current.nodeKey]: current
        }),{})
      }), {})
  }), {})
}

function makeNewStructure(scenes) {
  return Object.keys(scenes).reduce((prevNode, currentNode) => {
    let node = {}
    let currentScenesInNode = scenes[currentNode]

    for (let scene in currentScenesInNode) {
        let updatedScene = {}
      currentScenesInNode[scene].forEach(item => {
        return updatedScene[item.nodeKey] = item
      })

        node[scene] = updatedScene
    }

    return {
      ...prevNode, 
      [currentNode]: node
    }
  }, {})
}