```
const sum = arr => arr.reduce((a, b) => a + b, 0);
```

Returns the sum of all items in a numerical array.

##
Beware of JavaScripts Automatic Type Conversion if your `Array`

contains something else than `Numbers`

.

## The repository & npm package

You can find the all the utility functions from this series at github.com/martinkr/onelinecode

The library is also published to npm as @onelinecode for your convenience.

The code and the npm package will be updated every time I publish a new article.

Follow me on Twitter: @martinkr and consider to buy me a coffee

Photo by zoo_monkey on Unsplash

## Top comments (2)

not really serious...

:D