From 015524f049e020eaf6bc9897c6d2e84d184fd461 Mon Sep 17 00:00:00 2001
From: Steven Evans <kopelli@gmail.com>
Date: Thu, 5 Jul 2018 14:20:21 -0400
Subject: [PATCH] [refactor] Moved 'powerOfTwo' to 'isPowerOfTwo' TS file

---
 src/NetscriptFunctions.js     |  4 ++--
 utils/HelperFunctions.js      |  7 -------
 utils/helpers/isPowerOfTwo.ts | 13 +++++++++++++
 3 files changed, 15 insertions(+), 9 deletions(-)
 create mode 100644 utils/helpers/isPowerOfTwo.ts

diff --git a/src/NetscriptFunctions.js b/src/NetscriptFunctions.js
index f5f8df91d..af4786e67 100644
--- a/src/NetscriptFunctions.js
+++ b/src/NetscriptFunctions.js
@@ -48,7 +48,7 @@ import {NetscriptPort}                              from "./NetscriptPort";
 
 import Decimal                                      from "decimal.js";
 import {dialogBoxCreate}                            from "../utils/DialogBox";
-import {powerOfTwo}                                 from "../utils/HelperFunctions";
+import {isPowerOfTwo}                               from "../utils/helpers/isPowerOfTwo";
 import {arrayToString}                              from "../utils/helpers/arrayToString";
 import {createRandomIp}                             from "../utils/IPAddress";
 import {formatNumber, isHTML}                       from "../utils/StringHelperFunctions";
@@ -1548,7 +1548,7 @@ function NetscriptFunctions(workerScript) {
             }
 
             ram = Math.round(ram);
-            if (isNaN(ram) || !powerOfTwo(ram)) {
+            if (isNaN(ram) || !isPowerOfTwo(ram)) {
                 workerScript.scriptRef.log("ERROR: purchaseServer() failed due to invalid ram argument. Must be numeric and a power of 2");
                 return "";
             }
diff --git a/utils/HelperFunctions.js b/utils/HelperFunctions.js
index bb27dc046..d4a7a75af 100644
--- a/utils/HelperFunctions.js
+++ b/utils/HelperFunctions.js
@@ -110,17 +110,10 @@ function compareArrays(a1, a2) {
     return true;
 }
 
-//Returns bool indicating whether or not its a power of 2
-function powerOfTwo(n) {
-    if (isNaN(n)) {return false;}
-    return n && (n & (n-1)) === 0;
-}
-
 export {sizeOfObject,
         clearObject,
         clearEventListeners,
         compareArrays,
-        powerOfTwo,
         clearEventListenersEl,
         removeElement,
         createAccordionElement,
diff --git a/utils/helpers/isPowerOfTwo.ts b/utils/helpers/isPowerOfTwo.ts
new file mode 100644
index 000000000..ea7924954
--- /dev/null
+++ b/utils/helpers/isPowerOfTwo.ts
@@ -0,0 +1,13 @@
+/**
+ * Determines if the number is a power of 2
+ * @param n The number to check.
+ */
+export function isPowerOfTwo(n: number) {
+    if (isNaN(n)) {
+        return false;
+    }
+
+    // Disabiling the bitwise rule because it's honestly the most effecient way to check for this.
+    // tslint:disable-next-line:no-bitwise
+    return n && (n & (n - 1)) === 0;
+}