Added reverse array

chapter4/reverse_array.js

@@ -0,0 +1,25 @@
+function reverseArray(array){
+  var reversed = [];
+  for (i= 0; i < array.length; i++){
+    reversed.unshift(array[i]);
+  }
+
+  return reversed;
+}
+
+function reverseInPlace(array){
+  for(var i = 0; i < array.length/2; i++){
+    var temp = array[i];
+    array[i] = array[array.length - i - 1];
+    array[array.length - i - 1] = temp;
+  }
+}
+
+var sample = [1,2,3,4,5];
+var reversed = reverseArray(sample);
+console.log("Original: " + sample);
+console.log("Reversed: " + reversed);
+
+reverseInPlace(sample);
+
+console.log("Original reversed in place: " + sample);