Codewars 7 Kyu Nice Array Javascript

Summary

this one uses the every() and the some() methods every() info: ... this one uses the concat() method, spread syntax (...), and more concat() info: ... this one uses the trim() method trim() info: ... this one uses the map() and filter() methods, and more kata link: ... this one uses the push(), slice(), and filter() methods push() info: ... this one uses Math.abs() and indexOf() Math.abs() info: ... this one uses a for...in statement, a double for loop, and more kata link: ... this one uses the filter() method filter() info: ... this one uses the indexOf() and slice() methods kata link: this one uses the Set() object, spread syntax, and more Set() info: ... using concat() and reduce() on this one. this one uses the sort() method kata link: