30-seconds-of-code/snippets/truthCheckCollection.md

title, tags, expertise, cover, firstSeen, lastUpdated

title	tags	expertise	cover	firstSeen	lastUpdated
Truth check collection	object,logic,array	intermediate	blog_images/digital-nomad-8.jpg	2017-12-18T13:05:21+02:00	2020-10-22T20:24:44+03:00

Checks if the predicate function is truthy for all elements of a collection.

• Use Array.prototype.every() to check if each passed object has the specified property and if it returns a truthy value.

const truthCheckCollection = (collection, pre) =>
  collection.every(obj => obj[pre]);

truthCheckCollection(
  [
    { user: 'Tinky-Winky', sex: 'male' },
    { user: 'Dipsy', sex: 'male' },
  ],
  'sex'
); // true