typia/src/functional/$every.ts

Superfast runtime validators with only one line

import { TypeGuardError } from "../TypeGuardError";

export const $every = <T>(
  array: T[],
  pred: (value: T, i: number) => null | Omit<TypeGuardError.IProps, "method">,
): null | Omit<TypeGuardError.IProps, "method"> => {
  let error: null | Omit<TypeGuardError.IProps, "method"> = null;
  for (let i: number = 0; i < array.length; ++i)
    if (null !== (error = pred(array[i]!, i))) return error;
  return null;
};