Function join

packages/utils/src/comments.ts:109–111

* Given maybeArray, print an empty string if it is null or empty, otherwise * print all items together separated by separator if provided

(maybeArray?: readonly any[], separator?: string)

 * print all items together separated by separator if provided
 */
function join(maybeArray?: readonly any[], separator?: string) {
  return maybeArray ? maybeArray.filter(x => x).join(separator || '') : '';
}

function hasMultilineItems(maybeArray: Maybe<ReadonlyArray<string>>): boolean {
  return maybeArray?.some(str => str.includes('\n')) ?? false;