hugoaboud

/**
 * An efficient TypeScript utility type to transform a union of objects into the intersection of such objects.
 * 
 * - TypeScript 5.8.2
 * - Benchmarked against the similar type declared at [utility-types](https://github.com/piotrwitek/utility-types):
 *      - `utility-types`: ~250ms
 *      - `this`: ~30ms
 * 
 * - This haven't been deeply tested for correctness yet.
 */

hugoaboud

type DeepKeys<M> = {
  [J in keyof M as `${J & string}${
      M[J] extends Record<string, any> ?
        M[J] extends {constructor: M[J]} ? '' :
          M[J] extends Array<any> ? '' :
            `.${keyof DeepKeys<M[J]> & string}` : ''
  }`]:
  M[J] extends Record<string, any> ? M : M[J]
}

hugoaboud

import os

def dirtree(path):
  steps = list(os.walk(path))
  def _tree():
      _, child_dirs, files = steps.pop(0)
      obj = { child: _tree() for child in child_dirs }
      obj['__files__'] = files
      return obj
  return _tree()