Method keysOfType

source/predicates/map.ts:109–114

Test all the keys in the Map to match the provided predicate. @param predicate - The predicate that should be applied against every key in the Map.

(predicate: BasePredicate<T1>)

	@param predicate - The predicate that should be applied against every key in the Map.
	*/
	keysOfType(predicate: BasePredicate<T1>): this {
		return this.addValidator({
			message: (_, label, error) => `(${label}) ${error}`,
			validator: map => ofType(map.keys(), 'keys', predicate),
		});
	}

	/**
	Test all the values in the Map to match the provided predicate.