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pick ​

Problem ​

You need a subset of an object's keys — for example extracting only the public fields from a user record before sending a response.

Solution ​

Use pick(obj, keys) to return a new object containing only the specified keys.

ts
import { pick } from '@vielzeug/arsenal';

const user = { id: 1, name: 'Alice', password: 'secret', role: 'admin' };
pick(user, ['id', 'name']);
// { id: 1, name: 'Alice' }

Pitfalls ​

  • Returns a shallow copy — nested values are not cloned.
  • Keys not present in the object are silently ignored.