Creating JSON from an array by grouping common values.Would you like another rewrite?

Question

Creating JSON from an array by grouping common values.Would you like another rewrite?

Hey there, I'm facing a small issue with arrays similar to the ones below:

const arrays = {
    1: [c, u, g],
    2: [c, u],
    3: [c, u ,f],
    4: [c, g],
    5: [m, c, g],
    6: [u, m]
}

Each array contains unique values. Now, I'm looking to transform them into an object structure like this:

const object = {
  c: {
    u: {
      g: {
        ends: 1
      },
      f: {
        ends: 3
      }
      ends: 2
    },
    g: {
      m: {
        ends: 5
      }
      ends: 4
    }
  },
  u: {
    m: {
      ends: 6
    }
  }
}

Is it achievable? If so, any hints, code snippets, or advice would be greatly appreciated as I'm currently stuck on this problem.

javascript typescript

Answer 1

Answer №1

To iterate through the object entries and use the reduce method on the value arrays to create nested objects in each loop. The final result is a nested object with an additional ends property.

If you prefer unsorted nested paths, you can exclude the sort step.

const input = {
  1: ["c", "u", "g"],
  2: ["c", "u"],
  3: ["c", "u", "f"],
  4: ["c", "g"],
  5: ["m", "c", "g"],
  6: ["u", "m"]
}

const output = {};

for (const [n, paths] of Object.entries(input)) {
  paths
    .sort()
    .reduce((acc, path) => (acc[path] = acc[path] || {}), output)
    .ends = +n
}

console.log(output)

Answer 2

To iterate through the object entries and use the reduce method on the value arrays to create nested objects in each loop. The final result is a nested object with an additional ends property.

If you prefer unsorted nested paths, you can exclude the sort step.

const input = {
  1: ["c", "u", "g"],
  2: ["c", "u"],
  3: ["c", "u", "f"],
  4: ["c", "g"],
  5: ["m", "c", "g"],
  6: ["u", "m"]
}

const output = {};

for (const [n, paths] of Object.entries(input)) {
  paths
    .sort()
    .reduce((acc, path) => (acc[path] = acc[path] || {}), output)
    .ends = +n
}

console.log(output)

Creating JSON from an array by grouping common values.Would you like another rewrite?

Answer №1

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