A nice tutorial that I found and want to share. Good idea, but hard to follow since is missing content.

• build in methods
• build in methods ES6
• for loop
• for loop ES6
• recursive method
• reduce

• iterative approach
• regular expression

• for to iterate
• array formating

• forEach function
• map and slice methods
• map and replace

• build in methods
• a loop and comparing characters
• a loop and comparing characters (optimized)

• a for loop

• a for loop
• reduce
• sort

• replace
• regular expression (regex)

• direct comparasion
• character map comparison