Shorthand for "function" keyword
Allen Wirfs-Brock
allen at wirfs-brock.com
Fri Nov 10 16:47:18 UTC 2017
An idiom that assigns names to arrow functions arguments:
```js
let add, mul; //used to name arrow functions
const sum = [1, 2, 3].reduce(add = (a, b) => a + b);
const product = [1, 2, 3].reduce(mul = (a, b) => a * b);
```
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