Clean Code: Functions (Part 2) - Beau teaches JavaScript

Learn the best practices of how to create Clean Code in JS. This video tutorial is part 2 of how easy is to write Javascript functions that are readable, reusable, and refactorable. Special thanks to Ryan McDermott for a lot of the code in this video.

Code:
Ryan McDermott’s original article:

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[mudshark]

Just to be clear, when replacing conditional with polymorphism, a conditional might still be needed, just not inside the class.
Somewhere, someone or something needs to decide which subclass should be instantiated

[lucagambaro]

3:20 with the "for" loop, the complexity is just O(n), with the ".map" and the ".reduce" will be 2O(n), not the best in case of high data volume

[ievgengolskov]

I think for 3:50 there is a shorter sollution: const totalOutput = programmerOutput.reduce((acc, elem) => acc + elem.linesOfCode, 0)

[rafaelrocha]

Man.... im not going to use Inheritance. This makes the code reeeealy messy logically. But the videos are great!

[redelectro]

For the first function example, you forgot to give it an argument, what could be confusing for someone.

[briankoo]

aren't there cases where conditionals are just more convenient and gives you better performance?