Reduce (Composing Software)
Eric Elliott

Reduce is essential if you are working with datasets. It gets a little hairy when you have multi-dimensional data but it is doable. Bottom line: if you need to boil down data in Javascript (which I think everyone would need to do at some point) you should be using reduce.

One clap, two clap, three clap, forty?

By clapping more or less, you can signal to us which stories really stand out.