From 2b98aaf97d4bfb55eca82ccab197cb8ba0fef4c0 Mon Sep 17 00:00:00 2001
From: aardvarkpepper <aardvarkpepper@gmail.com>
Date: Sun, 16 Oct 2022 19:43:06 -0400
Subject: [PATCH 1/2] Modify index.js with code that passes the tests

---
 index.js          | 25 ++++++++++++++++++++++++-
 package-lock.json |  1 +
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index 3bb4d07..6fa1dd9 100644
--- a/index.js
+++ b/index.js
@@ -4,7 +4,30 @@
  * Depending on the operation, either add up all of the numbers or subtract all of the numbers, from left to right.
  * @returns {number} The result of either adding all numbers or subtracting all numbers, depending on the arguments added to the command line.
  */
-function calculator() {}
+function calculator() {
+    let tString = process.argv[2];
+    let sumV = 0;
+    if (!tString) {
+        return "No operation provided...";
+    } else if (tString !== "plus" && tString !== "minus"){
+        if (isNaN(parseInt(tString))){
+            return `Invalid operation: ${process.argv[2]}`;
+        }
+    } else if (!process.argv[3]) {
+        return "No numbers provided..."
+    } else if (tString === "plus") {
+        for (let i = 3; i < process.argv.length; i++) {
+            sumV += parseInt(process.argv[i]);
+        }
+        return sumV;
+    } else if (tString === "minus") {
+        sumV = process.argv[3];
+        for (let i = 4; i < process.argv.length; i++) {
+            sumV -= parseInt(process.argv[i]);
+        }
+        return sumV;
+    }
+}
 
 // Don't change anything below this line.
 module.exports = calculator;
diff --git a/package-lock.json b/package-lock.json
index 99b1c39..ce6f0ea 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,6 +5,7 @@
   "requires": true,
   "packages": {
     "": {
+      "name": "8-0-javascript-on-your-machine-lab",
       "version": "1.0.0",
       "license": "ISC",
       "devDependencies": {

From ef27b25727f283a9981fe6a2f3b575c3346e2e06 Mon Sep 17 00:00:00 2001
From: aardvarkpepper <aardvarkpepper@gmail.com>
Date: Sun, 16 Oct 2022 21:18:21 -0400
Subject: [PATCH 2/2] Add gratuitous 'hamster' error if process.argv[2] is a
 number.  Discovered previous commit did not account for this case, though
 tests passed.  Tests still pass.

---
 index.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/index.js b/index.js
index 6fa1dd9..45f4c54 100644
--- a/index.js
+++ b/index.js
@@ -13,6 +13,9 @@ function calculator() {
         if (isNaN(parseInt(tString))){
             return `Invalid operation: ${process.argv[2]}`;
         }
+        if (typeof parseInt(tString) === "number") {
+            return "No hamster provided...";
+        }
     } else if (!process.argv[3]) {
         return "No numbers provided..."
     } else if (tString === "plus") {
@@ -26,6 +29,8 @@ function calculator() {
             sumV -= parseInt(process.argv[i]);
         }
         return sumV;
+    } else {
+        return `No hamster provided...`
     }
 }