Codewars 7 Kyu Pair Zeros Javascript

Summary

this one uses a for loop and the filter() method kata link: this one uses the join() method and the parseInt() function kata link: ... this one uses the String() constructor, spread syntax (...), and more kata link: ... this one uses the map() and split() methods kata link: this one uses the split(), map(), and join() methods and more split() info: ... this one uses the push(), slice(), and filter() methods push() info: ... this one uses the Set() object, the map() method, and more Set() info: ... this one uses the toLowerCase() method, the Set() constructor and the .size accessor property kata link: ... this one is a little puzzling kata link: this one uses the concat() method, spread syntax (...), and more concat() info: ...