Functional programming with arrays Although JavaScript’s arrays are very capable out of the box, the functional paradigm improves the clarity and maintainability of array code.

Here's what beginning and experienced developers need to know about working with JavaScript's array, for loop, forEach, map, reduce, substring, and switch.

By offering familiar constructs like for-loops, if-conditions, and early breaks over structured data, Finch elevates the productivity level to that of dense arrays.