Let's implement the built in functions again!

• Try to use native functions and operators
• Avoid ES6+ features
• Your solution file should contain the MDN Link of the method you impleneted
• Your solution file should also contain some introduction about the method and few examples
• We will provide review to your implemenation
• Your PR should contain commented test cases
• We'll add our test cases during the review as well.

• Star the repo if you liked the efforts of the initiators
• Tweet about it.

All the best