Array FlatMap Method

    // Understanding Array.prototype.flatMap()
    // myArray.map().flat(1) - equivalent
    
    let movies = [
      'Dog Soldiers',
      ['In Bruges', 'From Paris with Love', 'Layer Cake'],
      'The Big Lebowski',
      '',
      '    ',
      'Memento, The Platform,Fight Club, ',
      'Hotel Rwanda, Moon, Under the Skin',
      'Lady Bird',
      ['Platoon', 'Wall-E'],
    ];
    let arr = movies.flatMap((entry) => {
      if (Array.isArray(entry)) {
        return entry;
      } else if (typeof entry === 'string' && entry.trim() === '') {
        return []; //remove the empty strings
      } else {
        //other strings
        return entry
          .split(',')
          .map((txt) => txt.trim())
          .filter((txt) => txt != '');
      }
    });
    console.log(arr);