freeCodeCamp Algorithms These algorithms are from the curriculum at freeCodeCamp Basic Intermediate Advanced Reverse a String Sum All Numbers in a Range Validate US Telephone Numbers Factorialize a Number Diff Two Arrays Record Collection Check for Palindromes Roman Numeral Converter Symmetric Difference Find the Longest Word in a String Wherefore art thou Exact Change Title Case Sentence Search and Replace Inventory Update Return Largest Numbers in Arrays Pig Latin No repeats please Confirm the Ending DNA Pairing Make a Person Repeat a string repeat a string Missing Letters Map the Debris Truncate a string Boo Who Pairwise Chunky Monkey Sorted Union -- Slasher Flick Convert HTML Entities -- Mutations Spinal Tap Case -- Falsy Bouncer Sum all Odd Fibonacci Numbers -- Seek and Destroy Sum All Primes -- Where do I belong Smallest Common Multiple -- Caesars Cipher Finders Keepers -- -- Drop It -- -- Steam Roller -- -- Binary Agents -- -- Everything Be True -- -- Arguments Optional -- I have solved these using Javascript, Java, and Python.