ihrm/node_modules/collect.js/docs/api/containsOneItem.md

containsOneItem()

The containsOneItem method returns true if the collection contains exactly one item; otherwise, false is returned:

collect([1]).containsOneItem();
// true

collect({ firstname: 'Luis' }).containsOneItem();
// true

collect('value').containsOneItem();
// true

collect([1, 2, 3]).containsOneItem();
//  false

collect({ firstname: 'Luis', lastname: 'Díaz' }).containsOneItem();
// false

collect().containsOneItem();
// false

collect([]).containsOneItem();
// false

collect({}).containsOneItem();
// false

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