problems(js): add “2677. Chunk Array”

Signed-off-by: Matej Focko <mfocko@redhat.com>

problems/js/chunk-array.js

@@ -0,0 +1,24 @@
+/**
+ * @param {Array} arr
+ * @param {number} size
+ * @return {Array[]}
+ */
+var chunk = function(arr, size) {
+    let chunked = [];
+
+    let current = new Array();
+    for (let i = 0; i < arr.length; ++i) {
+        current.push(arr[i]);
+
+        if ((i + 1) % size == 0) {
+            chunked.push(current);
+            current = new Array();
+        }
+    }
+
+    if (current.length > 0) {
+        chunked.push(current);
+    }
+
+    return chunked;
+};