Function findIndex

pkgs/core/src/locale/_lib/buildMatchFn/index.ts:126–136

(
  array: Item[],
  predicate: (item: Item) => boolean,
)

}

function findIndex<Item>(
  array: Item[],
  predicate: (item: Item) => boolean,
): number | undefined {
  for (let key = 0; key < array.length; key++) {
    if (predicate(array[key])) {
      return key;
    }
  }
  return undefined;
}