Function length

src/patterns.ts:857–858

(len: len)

 *   .with(P.string.length(10), () => 'strings with length === 10')
 */
const length = <const len extends number>(len: len) =>
  when((value) => isString(value) && value.length === len);

/**
 * `P.string.maxLength(max)` is a pattern, matching **strings** with at most `max` characters.