Find deeply nested JSON property using lodash

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I have a JSON API response with the following structure

[
  {
    title: "top1",
    sections: [
      {
        section_title: "section1",
        content: [
          {
            content_title: "title1",
            content_id: "id1"
          },
          {
            content_title: "title2",
            content_id: "id2"
          }
        ]
      },
      {
        section_title: "section2",
        content: [
          {
            content_title: "title3",
            content_id: "id3"
          },
          {
            content_title: "title4",
            content_id: "id4"
          }
        ]
      }
    ]
  }, {
    title: "top2",
    sections: [...]
  },
  ...
]

I also have a small array of content IDs arr2 = ['id2','id3']. I need to search the data from the API request to find any content_id that is contained in arr2.

I have some working lodash code, but my approach of nested forEach does not seem to be the most efficient approach:

_.forEach(response, function(top) {
  _.forEach(top.sections, function(section) {
    _.forEach(section.content, function(content) {
      _.forEach(arr2, function(id) {
        if(id === content.content_id) {
         // Do stuff
        }
      })
    })
  })
})

How could I improve this code?

2 Answers
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