30-seconds-of-code/javascript/snippets/truth-check-collection.md

title, type, tags, cover, dateModified

title	type	tags	cover	dateModified
Truth check collection	snippet	object logic array	digital-nomad-8	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