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

truthCheckCollection

Checks if the predicate (second argument) is truthy on all elements of a collection (first argument).

Use Array.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