Update and rename gcdOfArray.md to arrayGcd.md

Updated description and naming for consistency.

snippets/arrayGcd.md

@@ -0,0 +1,14 @@
+### arrayGcd
+
+Calculates the greatest common denominator (gcd) of an array of numbers.
+
+Use `Array.reduce()` and the `gcd` formula (uses recursion) to calculate the greatest common denominator of an array of numbers.
+
+```js
+const arrayGcd = arr =>{
+  const gcd = (x, y) => !y ? x : gcd(y, x % y);
+  return arr.reduce((a,b) => gcd(a,b));
+}
+// arrayGcd([1,2,3,4,5]) -> 1
+// arrayGcd([4,8,12]) -> 4
+```

snippets/gcdOfArray.md

@@ -1,13 +0,0 @@
-
-### gcdOfArray
-
-It finds the GCD of all the numbers in an array by using `Array.reduce()` and the fact that `gcd(a,b,c) = gcd(gcd(a,b),c)`
-
-```js
-const gcdOfArray = arr =>{
-  const gcd = (x, y) => !y ? x : gcd(y, x % y);
-  return arr.reduce((a,b) => gcd(a,b))
-  }
-// gcdOfArray([1,2,3,4,5]) -> 1
-// gcdOfArray([4,8,12]) -> 4
-```