import is from '@sindresorhus/is';

export function coerceArray<T>(input: T[] | null | undefined): T[] {
  if (is.array(input)) {
    return input;
  }
  return [];
}

export function sortNumeric(a: number, b: number): number {
  return a - b;
}

// Useful for filtering an array so that it includes values that are not null or
// undefined. This predicate acts as a type guard so that the resulting type for
// `values.filter(isNotNullOrUndefined)` is `T[]`.
export function isNotNullOrUndefined<T>(
  value: T | undefined | null
): value is T {
  return !is.nullOrUndefined(value);
}