Difference between

A comparison of the performance of the spread operator, [ ...array ], vs. Array.map(i => ...) and

Compare splitting a string and looking at a field versus extracting it with a regex

Show time vs space complexity of either solution

Show time vs space complexity of either solution

lodash

Access an stored element through object property key vs array filtering. Util for handlers references, when you need to store handlers and have acces for them later.