Transform An Array Into A String Codewars 7 Kyu Javascript

Summary

transform an array into a string this one uses spread syntax (...), the filter() method, and more spread syntax (. this one uses the match() method and regex match() info: ... this one uses some for loops, the conditional (ternary) operator, and the slice() method kata link: ... this one uses the Set() object, spread syntax, and more Set() info: ... this one uses the toLowerCase() method, the Set() constructor and the .size accessor property kata link: ... this one uses the split(), map(), and join() methods and more split() info: ... this one uses the sort() method kata link: this one uses the charCodeAt(), fromCharCode(), and slice() methods kata link: ...