shared/core-utils/common/object.ts

   1 function pick <O extends object, K extends keyof O> (object: O, keys: K[]): Pick<O, K> {
   2   const result: any = {}
   3
   4   for (const key of keys) {
   5     if (Object.prototype.hasOwnProperty.call(object, key)) {
   6       result[key] = object[key]
   7     }
   8   }
   9
  10   return result
  11 }
  12
  13 function omit <O extends object, K extends keyof O> (object: O, keys: K[]): Exclude<O, K> {
  14   const result: any = {}
  15   const keysSet = new Set(keys) as Set<string>
  16
  17   for (const [ key, value ] of Object.entries(object)) {
  18     if (keysSet.has(key)) continue
  19
  20     result[key] = value
  21   }
  22
  23   return result
  24 }
  25
  26 function getKeys <O extends object, K extends keyof O> (object: O, keys: K[]): K[] {
  27   return (Object.keys(object) as K[]).filter(k => keys.includes(k))
  28 }
  29
  30 function sortObjectComparator (key: string, order: 'asc' | 'desc') {
  31   return (a: any, b: any) => {
  32     if (a[key] < b[key]) {
  33       return order === 'asc' ? -1 : 1
  34     }
  35
  36     if (a[key] > b[key]) {
  37       return order === 'asc' ? 1 : -1
  38     }
  39
  40     return 0
  41   }
  42 }
  43
  44 function shallowCopy <T> (o: T): T {
  45   return Object.assign(Object.create(Object.getPrototypeOf(o)), o)
  46 }
  47
  48 function simpleObjectsDeepEqual (a: any, b: any) {
  49   if (a === b) return true
  50
  51   if (typeof a !== 'object' || typeof b !== 'object' || a === null || b === null) {
  52     return false
  53   }
  54
  55   const keysA = Object.keys(a)
  56   const keysB = Object.keys(b)
  57
  58   if (keysA.length !== keysB.length) return false
  59
  60   for (const key of keysA) {
  61     if (!keysB.includes(key)) return false
  62
  63     if (!simpleObjectsDeepEqual(a[key], b[key])) return false
  64   }
  65
  66   return true
  67 }
  68
  69 export {
  70   pick,
  71   omit,
  72   getKeys,
  73   shallowCopy,
  74   sortObjectComparator,
  75   simpleObjectsDeepEqual
  76 }