Best way to code JavaScript if you are living in 2019

This is a collection of snippets that may help you to improve your JavaScript code style.

ES6 introduced a lot of handy features, some of them are really useful to clean your code and help your teammates by delivering more readable code.

I've found myself not touching a for/while loop again!

These are my suggested snippets, give it a try and then let me know.

Best way to group an array of objects by key

Methods used: reduce() and concat().

Best way to sort an array by first name (alphabetically)

Methods used: sort() and localeCompare().

Best way to sort  an array of JSON objects numerically

Methods used: sort().

Best way to find counterpart object members 

Methods used: delete() and values().

Best way to code logical operations

Methods used: some().

Best way to concatenate  array operations

Methods used: filter() and map().

Best way to get unique values from a multidimensional array

Methods used: filter() and map().

Best way to get unique values from a multidimensional

Methods: flat() and filter().


Let me know your thoughts in the comments section.