paths_to_object.js

// A sketch demonstrating a way to take "/" delimited paths (e.g. '/foo/bar', '/foo/baz', '/foo/bak/quux', '/foo/bak/quuy') 
// and put them into a single object where the keys match the path hierarchy.

const pathVals = { '/foo/bar/baz': 1, '/foo/bar/bak': 2, '/foo/quux': 11, '/alpha': 13 }

// Expected:
//{
//  foo: {
//    bar: {
//      baz: 1,
//      bak: 2,
//    },
//    quux: 11
//  },
//  alpha: 13
//}
let obj = {}

const paths = Object.keys(pathVals)
for (let path of paths) {
  const val = pathVals[path]
  let bits = path.split('/').slice(1)
  let ptr = obj

  console.log({bits})
  for (let i = 0; i < bits.length; i++) {
    let bit = bits[i]
    if (i === (bits.length - 1)) {
      ptr[bit] = val
    } else {
      if (!ptr[bit]) {
        ptr[bit] = {}
      }
      ptr = ptr[bit]
    }
  }
  console.log(JSON.stringify({path, obj, ptr}, null, 2))
}
console.log(JSON.stringify({obj}, null, 2))