Discussion on: Filter Arrays with the Javascript Filter() Method

[JavaScript Joel]

I have fallen in love with this syntax over a for loop:

const isOlderThan18 = (age) => age > 18;

The reason being, with a for loop, the focus is on operating on the collection as a whole.

By making this minor change, we have simplified our work to just operating on a single item and not a whole collection of items, which is more complex.

Once we have solved how to handle the single item, it becomes easy to then apply that solution also to the collection.

const map = require('ramda/src/map')

const isOlderThan18 = (age) => age > 18;
const mapOlderThan18 = map(isOlderThan18)

const olderThan18 = mapOlderThan18(ages)

Cheers!