Aim of the puzzle: Use the .join() array method to combine an array of strings into a single string.
Walk through of solution: The .join() array method is used to join the elements of an array into a single string. If given a string as an argument, it will insert that string in between each element as it joins them. If no argument is given, it will insert a comma. To join an array without anything in-between the elements, an empty string can be used.
In this puzzle, the pieces array contains 5 separate strings. On the next line, the .join() method is called on pieces, and given an empty string as an argument. The resulting string 'SaturdayNight' is saved to the word variable.
Sample code solution:
let pieces = ['S','a','tur','day','Night'];
let word = pieces.join('');
console.log(word);
Javascript Concepts: Arrays, Strings, Array Methods, .join(), Variable Declarations with Let, console.log