Rename median-of-array-of.md to median-of-array-of-numbers.md

snippets/median-of-array-of-numbers.md

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+### Median of array of numbers
+
+Find the middle index of an array and sort the numbers in ascending order. If the length of the array is odd,
+return the number at the midpoint, otherwise return the average of the two middle numbers.
+
+```js
+const median = numbers => {
+  const midpoint = Math.floor(numbers.length / 2);
+  const sorted = numbers.sort((a, b) => a - b);
+
+  return numbers.length % 2 
+    ? sorted[midpoint] 
+    : (sorted[midpoint - 1] + sorted[midpoint]) / 2;
+};
+// median([5,6,50,1,-5]) -> 5
+// median([0,10,-2,7]) -> 3.5
+```