server/typings/utils.ts

   1 export type FunctionPropertyNames<T> = {
   2   [K in keyof T]: T[K] extends Function ? K : never
   3 }[keyof T]
   4
   5 export type FunctionProperties<T> = Pick<T, FunctionPropertyNames<T>>
   6
   7 export type PickWith<T, KT extends keyof T, V> = {
   8   [P in KT]: T[P] extends V ? V : never
   9 }
  10
  11 export type PickWithOpt<T, KT extends keyof T, V> = {
  12   [P in KT]?: T[P] extends V ? V : never
  13 }
  14
  15 // https://github.com/krzkaczor/ts-essentials Rocks!
  16 export type DeepPartial<T> = {
  17   [P in keyof T]?: T[P] extends Array<infer U>
  18     ? Array<DeepPartial<U>>
  19     : T[P] extends ReadonlyArray<infer U>
  20       ? ReadonlyArray<DeepPartial<U>>
  21       : DeepPartial<T[P]>
  22 };