Object (helping-js/core/object)

Pick/omit, deep path get/set, JSON clone, and iteration over plain objects. dotSet rejects __proto__, constructor, and prototype segments to avoid prototype pollution.

Imports

import {
  cloneObject,
  objectMap,
  objectOnly,
  objectExcept,
  iterateAll,
  findAll,
  dotGet,
  dotSet,
  unset,
  assign,
  objectAssign,
  objectAssignField,
  withoutUndefined,
  objectDefineProxyProperty,
  mapObjects,
  joinRows,
} from 'helping-js/core/object'

Highlights

Function	Role
dotGet(obj, path)	path string ('a.b') or array of keys
dotSet(obj, path, value)	Creates nested plain objects; unsafe keys no-op
objectOnly(obj, keys)	Pick existing keys
objectExcept(obj, keys)	Omit keys
cloneObject(obj)	JSON.parse(JSON.stringify(obj))
mapObjects(rows, keyField)	{ [id]: row }

Samples

Nested config

const cfg = {}
dotSet(cfg, 'server.port', 3000)
dotGet(cfg, 'server.port') // 3000

API response subset

const publicUser = objectOnly(user, ['id', 'name', 'email'])

Express: merge defaults

import { objectAssign } from 'helping-js/core/object'

const opts = objectAssign({ limit: 10 }, req.query)

React: row map by id

import { mapObjects } from 'helping-js/core/object'

const byId = mapObjects(rows, 'id')
const row = byId[selectedId]

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