1import { throwIf } from '../throwErrorF/throwIfF.mts'
2import { assertDefined } from '../assertsF/assertDefinedF.mts'
3
4const findOnly = <T,>(arr: T[], predicate: (item: T) => boolean): T | undefined => {
5  const matches = arr.filter(predicate)
6  throwIf(() => matches.length > 1, {matchCount: matches.length, matches})
7  return matches[0]
8}
9
10export const findOnlyReq = <T,>(arr: T[], predicate: (item: T) => boolean): T => {
11  const result = findOnly(arr, predicate)
12  assertDefined(result, {arr})
13  return result
14}
15