JavaScript — Strings

1 Reverse a string Easy 2 Check palindrome Easy 3 Title case a sentence Medium 4 Count word frequency Medium 5 Valid parentheses Hard 6 Sum 1..5 #1 Hard 7 Filter evens #2 Medium 8 Map squares #3 Easy 9 Max in set #4 Medium 10 Reduce product #5 Hard 11 Sum 1..10 #6 Medium 12 Filter evens #7 Easy 13 Map squares #8 Medium 14 Max in set #9 Hard 15 Reduce product #10 Medium 16 Sum 1..15 #11 Easy 17 Filter evens #12 Medium 18 Map squares #13 Hard 19 Max in set #14 Medium 20 Reduce product #15 Easy 21 Sum 1..5 #16 Medium 22 Filter evens #17 Hard 23 Map squares #18 Medium 24 Max in set #19 Easy 25 Reduce product #20 Medium 26 Sum 1..10 #21 Hard 27 Filter evens #22 Medium 28 Map squares #23 Easy 29 Max in set #24 Medium 30 Reduce product #25 Hard 31 Sum 1..15 #26 Medium 32 Filter evens #27 Easy 33 Map squares #28 Medium 34 Max in set #29 Hard 35 Reduce product #30 Medium