Palindroms

• recursion
• stringmanipulation

string.replace(/[^A-Za-z0-9]/g, '') gets rid of spaces
string.split('').reverse().join('')

• for loops for loops for (var i = 0; i < len / 2; i++) { if (characters[i] !== characters[len - 1 - i]) return false; }

Reversing strings = 1) reverse
2) decrementing for loop
3) recursion with substr and charAt

Binary Search.. linkedlist ... etc to come