Travis build: 47

README.md

@@ -12,6 +12,7 @@
 
 ### Array
 * [`arrayGcd`](#arraygcd)
+* [`arrayLcm`](#arraylcm)
 * [`arrayMax`](#arraymax)
 * [`arrayMin`](#arraymin)
 * [`chunk`](#chunk)
@@ -175,6 +176,24 @@ const arrayGcd = arr =>{
 
 [⬆ back to top](#table-of-contents)
 
+### arrayLcm
+
+Calculates the lowest  common multiple  (lcm) of an array of numbers.
+
+Use `Array.reduce()` and the `lcm` formula (uses recursion) to calculate the lowest  common multiple  of an array of numbers.
+
+```js
+const arrayLcm = arr =>{
+  const gcd = (x, y) => !y ? x : gcd(y, x % y);
+  const lcm = (x, y) => (x*y)/gcd(x, y) 
+  return arr.reduce((a,b) => lcm(a,b));
+}
+// arrayLcm([1,2,3,4,5]) -> 60
+// arrayLcm([4,8,12]) -> 24
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### arrayMax
 
 Returns the maximum value in an array.