violet-athena · November 28, 2016 01:21
diff --git a/sumOfArray.js b/sumOfArray.js
 // manual implementation
 const sum = ([first, ...rest]) => rest.length ? first + sum(rest) : first;

 // using reduce
 const sum = arr => arr.reduce((acc, el) => acc + el, 0);
	// manual implementation
	const sum = ([first, ...rest]) => rest.length ? first + sum(rest) : first;

	// using reduce
	const sum = arr => arr.reduce((acc, el) => acc + el, 0);