From 853119144b6ce03cda9180d081667e109fd1bd52 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Thu, 5 Nov 2026 23:12:38 +0000
Subject: [PATCH 01/43] object prep

---
 Sprint-2/prep/ordered-data.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 Sprint-2/prep/ordered-data.js

diff --git a/Sprint-2/prep/ordered-data.js b/Sprint-2/prep/ordered-data.js
new file mode 100644
index 000000000..016c7f9b2
--- /dev/null
+++ b/Sprint-2/prep/ordered-data.js
@@ -0,0 +1,18 @@
+// const profileData = {
+//     firstName: "Franceso",
+//     lastName: "Leoni",
+//     age: 33,
+// }
+
+// // console.log(profileData.cityOfResidence);
+// profileData.cityOfResidence = "Manchester"
+// console.log(profileData.cityOfResidence);
+
+const object1 = {
+    firstName: "Franceso",
+    lastName: "Leoni",
+}
+
+const object2 = {};
+object2.firstName = "Franceso";
+object2.lastName = "Leoni";
\ No newline at end of file

From 037311d0c016c150cf007b0fdedcba6be22cb1e9 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 10:30:05 +0000
Subject: [PATCH 02/43] fix houseNumber error

---
 Sprint-2/debug/address.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Sprint-2/debug/address.js b/Sprint-2/debug/address.js
index 940a6af83..45fea9ae2 100644
--- a/Sprint-2/debug/address.js
+++ b/Sprint-2/debug/address.js
@@ -1,8 +1,8 @@
 // Predict and explain first...
 
-// This code should log out the houseNumber from the address object
-// but it isn't working...
-// Fix anything that isn't working
+// Answer: 
+// The address in the code is an object not an array, 
+// it wont log out because we try to use the array syntax instead of the object syntax
 
 const address = {
   houseNumber: 42,
@@ -12,4 +12,4 @@ const address = {
   postcode: "XYZ 123",
 };
 
-console.log(`My house number is ${address[0]}`);
+console.log(`My house number is ${address.houseNumber}`);

From 13f83e151fc7bc46e85cc05ff3a14a5e70d04d6b Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 10:46:02 +0000
Subject: [PATCH 03/43] fix author object iteration

---
 Sprint-2/debug/author.js            |  6 +++---
 Sprint-2/prep/parse-query-string.js | 15 +++++++++++++++
 2 files changed, 18 insertions(+), 3 deletions(-)
 create mode 100644 Sprint-2/prep/parse-query-string.js

diff --git a/Sprint-2/debug/author.js b/Sprint-2/debug/author.js
index 8c2125977..31c5eb0d1 100644
--- a/Sprint-2/debug/author.js
+++ b/Sprint-2/debug/author.js
@@ -1,7 +1,7 @@
 // Predict and explain first...
 
-// This program attempts to log out all the property values in the object.
-// But it isn't working. Explain why first and then fix the problem
+// Answer:
+// A plain object is not iterable, so 'for...of cannot loop over author directly
 
 const author = {
   firstName: "Zadie",
@@ -11,6 +11,6 @@ const author = {
   alive: true,
 };
 
-for (const value of author) {
+for (const value of Object.values(author)) {
   console.log(value);
 }
diff --git a/Sprint-2/prep/parse-query-string.js b/Sprint-2/prep/parse-query-string.js
new file mode 100644
index 000000000..41c0b1f8b
--- /dev/null
+++ b/Sprint-2/prep/parse-query-string.js
@@ -0,0 +1,15 @@
+function parseQueryString(queryString) {
+  const queryParams = {};
+  if (queryString.length === 0) {
+    return queryParams;
+  }
+  const keyValuePairs = queryString.split("&");
+
+  for (const pair of keyValuePairs) {
+    const [key, value] = pair.split("=");
+    queryParams[key] = value;
+  }
+
+  return queryParams;
+}
+module.exports = parseQueryString;

From 3d72ba18db43cb679aa9f9027b6684a7502b1c36 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 10:46:48 +0000
Subject: [PATCH 04/43] add tests for parseQueryString function to validate
 query string parsing

---
 Sprint-2/prep/parse-query-string.test.js | 27 ++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 Sprint-2/prep/parse-query-string.test.js

diff --git a/Sprint-2/prep/parse-query-string.test.js b/Sprint-2/prep/parse-query-string.test.js
new file mode 100644
index 000000000..639d4baa5
--- /dev/null
+++ b/Sprint-2/prep/parse-query-string.test.js
@@ -0,0 +1,27 @@
+const parseQueryString = require("./parse-query-string.js");
+
+test("given a query string with no query parameter, return an empty object", () => {
+    const input = "";
+    const currentOutput =  parseQueryString(input);
+    const targetOutput = {};
+
+    expect(currentOutput).toEqual(targetOutput);
+});
+
+test("given a query string with one pair of query params, return them in object form", function () {
+    const input = "fruit=banana";
+    const currentOutput = parseQueryString(input);
+    const targetOutput = { fruit: "banana"};
+
+    expect(currentOutput).toEqual(targetOutput);
+
+});
+
+test("given a query string with multiple key-value pairs, returns them in object form", function () {
+  const input = "sort=lowest&colour=yellow";
+  const currentOutput = parseQueryString(input);
+  const targetOutput = { sort: "lowest", colour: "yellow" };
+
+  expect(currentOutput).toEqual(targetOutput);
+});
+

From 454659b0af0000b6c4f0e809ec97d6cbe3d29284 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 10:46:56 +0000
Subject: [PATCH 05/43] add function to double all numbers in an array

---
 prep/doubleAllNumbers.js | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 prep/doubleAllNumbers.js

diff --git a/prep/doubleAllNumbers.js b/prep/doubleAllNumbers.js
new file mode 100644
index 000000000..58045564e
--- /dev/null
+++ b/prep/doubleAllNumbers.js
@@ -0,0 +1,13 @@
+function doubleAllNumbers() {
+  let doubledNumbers;
+
+  for (let n of numbers) {
+    doubledNumbers.push(n * 2);
+  }
+
+  return doubledNumbers;
+}
+
+const myNums = [10, 20, 30];
+doubleAllNumbers(myNums);
+console.log(myNums);

From af702ab01d350e9c9d4d647f35a52085abe907db Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 10:47:22 +0000
Subject: [PATCH 06/43] fix formatting in address.js comments for clarity

---
 Sprint-2/debug/address.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Sprint-2/debug/address.js b/Sprint-2/debug/address.js
index 45fea9ae2..fbd2f3a7f 100644
--- a/Sprint-2/debug/address.js
+++ b/Sprint-2/debug/address.js
@@ -1,7 +1,7 @@
 // Predict and explain first...
 
-// Answer: 
-// The address in the code is an object not an array, 
+// Answer:
+// The address in the code is an object not an array,
 // it wont log out because we try to use the array syntax instead of the object syntax
 
 const address = {

From e6ed80a1a273f6c3c5054ecc7b358d4f14db8b10 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 10:58:55 +0000
Subject: [PATCH 07/43] fix recipe logging to display ingredients correctly

---
 Sprint-2/debug/recipe.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Sprint-2/debug/recipe.js b/Sprint-2/debug/recipe.js
index 6cbdd22cd..1775f131d 100644
--- a/Sprint-2/debug/recipe.js
+++ b/Sprint-2/debug/recipe.js
@@ -12,4 +12,5 @@ const recipe = {
 
 console.log(`${recipe.title} serves ${recipe.serves}
   ingredients:
-${recipe}`);
+${recipe.ingredients.join("\n")}`);
+

From e80fd6fad4bde6d4ccf92eb5981924024c068743 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 11:02:56 +0000
Subject: [PATCH 08/43] fix comments in recipe.js to clarify logging
 functionality

---
 Sprint-2/debug/recipe.js | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/Sprint-2/debug/recipe.js b/Sprint-2/debug/recipe.js
index 1775f131d..f4f6f24ce 100644
--- a/Sprint-2/debug/recipe.js
+++ b/Sprint-2/debug/recipe.js
@@ -1,8 +1,7 @@
 // Predict and explain first...
 
-// This program should log out the title, how many it serves and the ingredients.
-// Each ingredient should be logged on a new line
-// How can you fix it?
+// The program won't print the ingredients because it wasn't called on line 14
+
 
 const recipe = {
   title: "bruschetta",

From 74c65b797d7c75d5761d09f72fbd31ab835b30c7 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 11:34:22 +0000
Subject: [PATCH 09/43] implement test for contains function to check empty
 object case

---
 Sprint-2/implement/contains.test.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Sprint-2/implement/contains.test.js b/Sprint-2/implement/contains.test.js
index 719272787..e997cd424 100644
--- a/Sprint-2/implement/contains.test.js
+++ b/Sprint-2/implement/contains.test.js
@@ -23,7 +23,10 @@ as an array isn't an object
 // Given an empty object
 // When passed to contains
 // Then it should return false
-test.todo("contains on empty object returns false");
+test("contains on empty object returns false", () => {
+    expect(contains({}, "a")).toBe(false)
+});
+
 
 // Given an object with properties
 // When passed to contains with an existing property name

From c61f58edbd05fbc56c760475a1259219ba575bd8 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 11:46:29 +0000
Subject: [PATCH 10/43] implement contains function to check if property exists
 in object

---
 Sprint-2/implement/contains.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Sprint-2/implement/contains.js b/Sprint-2/implement/contains.js
index cd779308a..fcc208518 100644
--- a/Sprint-2/implement/contains.js
+++ b/Sprint-2/implement/contains.js
@@ -1,3 +1,5 @@
-function contains() {}
+function contains(object, property) {
+    return property in object;
+}
 
 module.exports = contains;

From 438293bebcc3ab84fd749e4fedbf3491963588fb Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 11:46:35 +0000
Subject: [PATCH 11/43] refactor contains.test.js to improve test structure and
 formatting

---
 Sprint-2/implement/contains.test.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Sprint-2/implement/contains.test.js b/Sprint-2/implement/contains.test.js
index e997cd424..d15cfe216 100644
--- a/Sprint-2/implement/contains.test.js
+++ b/Sprint-2/implement/contains.test.js
@@ -24,9 +24,12 @@ as an array isn't an object
 // When passed to contains
 // Then it should return false
 test("contains on empty object returns false", () => {
-    expect(contains({}, "a")).toBe(false)
+  expect(contains({}, "a")).toBe(false);
 });
 
+test("contains an object with existing property, return true", () => {
+  expect(contains({ a: 1, b: 2 }, "a")).toBe(true);
+});
 
 // Given an object with properties
 // When passed to contains with an existing property name

From 4e217bc765f4c64702a5fa2bf36e6404f8210a20 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 11:50:40 +0000
Subject: [PATCH 12/43] add test for contains function to verify behavior with
 missing property

---
 Sprint-2/implement/contains.test.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Sprint-2/implement/contains.test.js b/Sprint-2/implement/contains.test.js
index d15cfe216..0d57fb0d3 100644
--- a/Sprint-2/implement/contains.test.js
+++ b/Sprint-2/implement/contains.test.js
@@ -31,6 +31,10 @@ test("contains an object with existing property, return true", () => {
   expect(contains({ a: 1, b: 2 }, "a")).toBe(true);
 });
 
+test("contains an object with missing property, return false", () => {
+  expect(contains({ a: 1, b: 2 }, "c")).toBe(false);
+});
+
 // Given an object with properties
 // When passed to contains with an existing property name
 // Then it should return true

From b72528b703aff97c6f0f7bfb6deaf69987d611b2 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 12:10:11 +0000
Subject: [PATCH 13/43] add test to ensure contains function throws error for
 array input

---
 Sprint-2/implement/contains.test.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Sprint-2/implement/contains.test.js b/Sprint-2/implement/contains.test.js
index 0d57fb0d3..213034380 100644
--- a/Sprint-2/implement/contains.test.js
+++ b/Sprint-2/implement/contains.test.js
@@ -35,6 +35,9 @@ test("contains an object with missing property, return false", () => {
   expect(contains({ a: 1, b: 2 }, "c")).toBe(false);
 });
 
+test("contains throws for an array", () => {
+  expect(() => contains([1, 2, 3], "a")).toThrow("contains requires an object");
+});
 // Given an object with properties
 // When passed to contains with an existing property name
 // Then it should return true

From e8cf923e1682b207d4c47420bc181efbf9c67f05 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 12:15:05 +0000
Subject: [PATCH 14/43] refactor contains function to validate input type
 before checking property existence

---
 Sprint-2/implement/contains.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Sprint-2/implement/contains.js b/Sprint-2/implement/contains.js
index fcc208518..0b4758042 100644
--- a/Sprint-2/implement/contains.js
+++ b/Sprint-2/implement/contains.js
@@ -1,5 +1,8 @@
 function contains(object, property) {
-    return property in object;
+  if (typeof object !== "object" || object === null || Array.isArray(object)) {
+    throw new Error("contains requires an object");
+  }
+  return property in object;
 }
 
 module.exports = contains;

From 8e89f1d80c87b5ecd1904832bb35d10c41f84997 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 12:16:04 +0000
Subject: [PATCH 15/43] remove redundant comments and acceptance criteria from
 contains.test.js

---
 Sprint-2/implement/contains.test.js | 36 -----------------------------
 1 file changed, 36 deletions(-)

diff --git a/Sprint-2/implement/contains.test.js b/Sprint-2/implement/contains.test.js
index 213034380..72c19df6c 100644
--- a/Sprint-2/implement/contains.test.js
+++ b/Sprint-2/implement/contains.test.js
@@ -1,28 +1,5 @@
 const contains = require("./contains.js");
 
-/*
-Implement a function called contains that checks an object contains a
-particular property
-
-E.g. contains({a: 1, b: 2}, 'a') // returns true
-as the object contains a key of 'a'
-
-E.g. contains({a: 1, b: 2}, 'c') // returns false
-as the object doesn't contains a key of 'c'
-
-E.g. contains([1, 2, 3], 'a') throws Error("contains requires an object")
-as an array isn't an object
-*/
-
-// Acceptance criteria:
-
-// Given a contains function
-// When passed an object and a property name
-// Then it should return true if the object contains the property, false otherwise
-
-// Given an empty object
-// When passed to contains
-// Then it should return false
 test("contains on empty object returns false", () => {
   expect(contains({}, "a")).toBe(false);
 });
@@ -38,16 +15,3 @@ test("contains an object with missing property, return false", () => {
 test("contains throws for an array", () => {
   expect(() => contains([1, 2, 3], "a")).toThrow("contains requires an object");
 });
-// Given an object with properties
-// When passed to contains with an existing property name
-// Then it should return true
-
-// Given an object with properties
-// When passed to contains with a non-existent property name
-// Then it should return false
-
-// Given a value that isn't an object - an array, a string, a number,
-// null, or no argument at all
-// When passed to contains
-// Then it should throw Error("contains requires an object")
-// (careful: typeof [] and typeof null are both "object")

From c39280d895647ffec1e38c59cdd2f6861b8e2c46 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 12:36:12 +0000
Subject: [PATCH 16/43] implement test for createLookup function to validate
 country-currency pairs

---
 Sprint-2/implement/lookup.test.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Sprint-2/implement/lookup.test.js b/Sprint-2/implement/lookup.test.js
index 547e06c5a..2c37940ed 100644
--- a/Sprint-2/implement/lookup.test.js
+++ b/Sprint-2/implement/lookup.test.js
@@ -1,6 +1,8 @@
 const createLookup = require("./lookup.js");
 
-test.todo("creates a country currency code lookup for multiple codes");
+test("creates a country currency code lookup for multiple codes", () => {
+  expect(createLookup([["US", "USD"], ["CA", "CAD"]])).toEqual()
+});
 
 /*
 

From 80034abc956fe68f8b33e0ceb136a019c21c3b65 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 12:43:48 +0000
Subject: [PATCH 17/43] fix: update test to validate correct output for
 createLookup function

---
 Sprint-2/implement/lookup.test.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sprint-2/implement/lookup.test.js b/Sprint-2/implement/lookup.test.js
index 2c37940ed..196b5b8f5 100644
--- a/Sprint-2/implement/lookup.test.js
+++ b/Sprint-2/implement/lookup.test.js
@@ -1,7 +1,7 @@
 const createLookup = require("./lookup.js");
 
 test("creates a country currency code lookup for multiple codes", () => {
-  expect(createLookup([["US", "USD"], ["CA", "CAD"]])).toEqual()
+  expect(createLookup([["US", "USD"], ["CA", "CAD"]])).toEqual({US: "USD", CA: "CAD"})
 });
 
 /*

From 8c1878d5e4d96193c053504de77458bc0ae4d005 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 12:43:54 +0000
Subject: [PATCH 18/43] implement createLookup function to map country-currency
 pairs

---
 Sprint-2/implement/lookup.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Sprint-2/implement/lookup.js b/Sprint-2/implement/lookup.js
index a6746e07f..cdd6788c0 100644
--- a/Sprint-2/implement/lookup.js
+++ b/Sprint-2/implement/lookup.js
@@ -1,5 +1,9 @@
-function createLookup() {
-  // implementation here
+function createLookup(countryCurrencyPairs) {
+  const lookup = {};
+  for (const [country, currency] of countryCurrencyPairs) {
+    lookup[country] = currency;
+  }
+  return lookup
 }
 
 module.exports = createLookup;

From 62d2398f3ad5e1409c009440bc0286380b33e156 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 12:47:47 +0000
Subject: [PATCH 19/43] refactor: improve formatting of createLookup test and
 remove redundant comments

---
 Sprint-2/implement/lookup.test.js | 39 +++++--------------------------
 1 file changed, 6 insertions(+), 33 deletions(-)

diff --git a/Sprint-2/implement/lookup.test.js b/Sprint-2/implement/lookup.test.js
index 196b5b8f5..342c7d398 100644
--- a/Sprint-2/implement/lookup.test.js
+++ b/Sprint-2/implement/lookup.test.js
@@ -1,37 +1,10 @@
 const createLookup = require("./lookup.js");
 
 test("creates a country currency code lookup for multiple codes", () => {
-  expect(createLookup([["US", "USD"], ["CA", "CAD"]])).toEqual({US: "USD", CA: "CAD"})
+  expect(
+    createLookup([
+      ["US", "USD"],
+      ["CA", "CAD"],
+    ])
+  ).toEqual({ US: "USD", CA: "CAD" });
 });
-
-/*
-
-Create a lookup object of key value pairs from an array of code pairs
-
-Acceptance Criteria:
-
-Given
- - An array of arrays representing country code and currency code pairs
-   e.g. [['US', 'USD'], ['CA', 'CAD']]
-
-When
- - createLookup function is called with the country-currency array as an argument
-
-Then
- - It should return an object where:
- - The keys are the country codes
- - The values are the corresponding currency codes
-
-Example
-Given: [['US', 'USD'], ['CA', 'CAD']]
-
-When
-createLookup(countryCurrencyPairs) is called
-
-Then
-It should return:
- {
-   'US': 'USD',
-   'CA': 'CAD'
- }
-*/

From b1fdc4db2eba7111044139fb4620559ecac150e8 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 14:36:18 +0000
Subject: [PATCH 20/43] refactor: simplify parseQueryString function by
 removing redundant checks and comments

---
 Sprint-2/implement/querystring.js | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/Sprint-2/implement/querystring.js b/Sprint-2/implement/querystring.js
index 45ec4e5f3..efae7b914 100644
--- a/Sprint-2/implement/querystring.js
+++ b/Sprint-2/implement/querystring.js
@@ -1,14 +1,21 @@
 function parseQueryString(queryString) {
   const queryParams = {};
-  if (queryString.length === 0) {
-    return queryParams;
-  }
-  const keyValuePairs = queryString.split("&");
 
-  for (const pair of keyValuePairs) {
-    const [key, value] = pair.split("=");
+  for (const pair of queryString.split("&")) {
+    const eq = pair.indexOf("=");
+    const key = eq === -1 ? pair : pair.slice(0, eq);
+    const value = eq === -1 ? undefined : pair.slice(eq + 1);
     queryParams[key] = value;
   }
+  //   if (queryString.length === 0) {
+  //     return queryParams;
+  //   }
+  //   const keyValuePairs = queryString.split("&");
+
+  //   for (const pair of keyValuePairs) {
+  //     const [key, value] = pair.split("=");
+  //     queryParams[key] = value;
+  //   }
 
   return queryParams;
 }

From 05ccd8ccaac58f6882015e4930ef83872fe6ffd7 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 14:41:38 +0000
Subject: [PATCH 21/43] refactor: clean up parseQueryString function by
 removing unnecessary comments and whitespace

---
 Sprint-2/implement/querystring.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Sprint-2/implement/querystring.js b/Sprint-2/implement/querystring.js
index efae7b914..3bb581195 100644
--- a/Sprint-2/implement/querystring.js
+++ b/Sprint-2/implement/querystring.js
@@ -2,11 +2,19 @@ function parseQueryString(queryString) {
   const queryParams = {};
 
   for (const pair of queryString.split("&")) {
+    if (pair === "") continue;
+    
     const eq = pair.indexOf("=");
     const key = eq === -1 ? pair : pair.slice(0, eq);
     const value = eq === -1 ? undefined : pair.slice(eq + 1);
     queryParams[key] = value;
   }
+
+
+
+
+
+
   //   if (queryString.length === 0) {
   //     return queryParams;
   //   }

From fe222e0b6b64314859923c9fb003a43f486fa4c3 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 14:46:06 +0000
Subject: [PATCH 22/43] fix: correct value assignment in parseQueryString and
 decode URI components

---
 Sprint-2/implement/querystring.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Sprint-2/implement/querystring.js b/Sprint-2/implement/querystring.js
index 3bb581195..77d00fe09 100644
--- a/Sprint-2/implement/querystring.js
+++ b/Sprint-2/implement/querystring.js
@@ -3,11 +3,14 @@ function parseQueryString(queryString) {
 
   for (const pair of queryString.split("&")) {
     if (pair === "") continue;
-    
+
     const eq = pair.indexOf("=");
     const key = eq === -1 ? pair : pair.slice(0, eq);
-    const value = eq === -1 ? undefined : pair.slice(eq + 1);
+    const value = eq === -1 ? "" : pair.slice(eq + 1);
     queryParams[key] = value;
+
+    const key = decodeURIComponent(eq === -1 ? : pair.slice(0, eq));
+    const value = eq === -1 ? "" : decodeURIComponent(pair.slice(eq + 1));
   }
 
 

From 89d8fda6f633981eafc818767823be6e7bb2a491 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 14:48:23 +0000
Subject: [PATCH 23/43] fix: decode URI components in parseQueryString function

---
 Sprint-2/implement/querystring.js | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/Sprint-2/implement/querystring.js b/Sprint-2/implement/querystring.js
index 77d00fe09..a8b0a49f8 100644
--- a/Sprint-2/implement/querystring.js
+++ b/Sprint-2/implement/querystring.js
@@ -8,16 +8,8 @@ function parseQueryString(queryString) {
     const key = eq === -1 ? pair : pair.slice(0, eq);
     const value = eq === -1 ? "" : pair.slice(eq + 1);
     queryParams[key] = value;
-
-    const key = decodeURIComponent(eq === -1 ? : pair.slice(0, eq));
-    const value = eq === -1 ? "" : decodeURIComponent(pair.slice(eq + 1));
   }
 
-
-
-
-
-
   //   if (queryString.length === 0) {
   //     return queryParams;
   //   }

From 17adfe97f6931bffcd8382fe2daf9804a7b2649e Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 14:56:20 +0000
Subject: [PATCH 24/43] fix: decode URI components in parseQueryString function

---
 Sprint-2/implement/querystring.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Sprint-2/implement/querystring.js b/Sprint-2/implement/querystring.js
index a8b0a49f8..201bf8849 100644
--- a/Sprint-2/implement/querystring.js
+++ b/Sprint-2/implement/querystring.js
@@ -7,7 +7,11 @@ function parseQueryString(queryString) {
     const eq = pair.indexOf("=");
     const key = eq === -1 ? pair : pair.slice(0, eq);
     const value = eq === -1 ? "" : pair.slice(eq + 1);
-    queryParams[key] = value;
+   
+    const k = decodeURIComponent(key.replace(/+/g, ""));
+    const v = decodeURIComponent(value.replace(/+/g, ""));
+
+    
   }
 
   //   if (queryString.length === 0) {

From 4918e8517630e5afca4ce4e39cf6b25e5f58a2ea Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 15:23:05 +0000
Subject: [PATCH 25/43] refactor: improve key and value decoding in
 parseQueryString function

---
 Sprint-2/implement/querystring.js | 27 ++++++++++++---------------
 1 file changed, 12 insertions(+), 15 deletions(-)

diff --git a/Sprint-2/implement/querystring.js b/Sprint-2/implement/querystring.js
index 201bf8849..cb391d9e1 100644
--- a/Sprint-2/implement/querystring.js
+++ b/Sprint-2/implement/querystring.js
@@ -7,23 +7,20 @@ function parseQueryString(queryString) {
     const eq = pair.indexOf("=");
     const key = eq === -1 ? pair : pair.slice(0, eq);
     const value = eq === -1 ? "" : pair.slice(eq + 1);
-   
-    const k = decodeURIComponent(key.replace(/+/g, ""));
-    const v = decodeURIComponent(value.replace(/+/g, ""));
 
-    
-  }
-
-  //   if (queryString.length === 0) {
-  //     return queryParams;
-  //   }
-  //   const keyValuePairs = queryString.split("&");
-
-  //   for (const pair of keyValuePairs) {
-  //     const [key, value] = pair.split("=");
-  //     queryParams[key] = value;
-  //   }
+    const k = decodeURIComponent(key.split("+").join(" "));
+    const v = decodeURIComponent(value.split("+").join(" "));
 
+    if (k in queryParams) {
+      if (Array.isArray(queryParams[k])) {
+        queryParams[k].push(v);
+      } else {
+        queryParams[k] = [queryParams[k], v];
+      }
+    } else {
+      queryParams[k] = v;
+    }
+  }
   return queryParams;
 }
 

From f57327351f4e33ac4357987594218dbd41c64dac Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 15:27:34 +0000
Subject: [PATCH 26/43] test: add test for handling empty query string

---
 Sprint-2/implement/querystring.test.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Sprint-2/implement/querystring.test.js b/Sprint-2/implement/querystring.test.js
index 328b8df61..1b0bfca2e 100644
--- a/Sprint-2/implement/querystring.test.js
+++ b/Sprint-2/implement/querystring.test.js
@@ -37,12 +37,13 @@ test("should replace '+' by ' '", () => {
   });
 });
 
-// Stretch exercise: Handling query strings that contain identical keys
-
-// Delete this test if you are not working on this optional case
 test("should store values of a key in an array when the key has 2 or more values", () => {
   expect(parseQueryString("key=value1&key=value2&key=value3&foo=bar")).toEqual({
     key: ["value1", "value2", "value3"],
     foo: "bar",
   });
 });
+
+test("returns an empty query string", () => {
+  expect(parseQueryString("")).toEqual({});
+});

From 05ee028da0db7d43856f6ff3ef301ff410b8635e Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 15:30:16 +0000
Subject: [PATCH 27/43] test: add test for handling values with both + and
 percent-encoding

---
 Sprint-2/implement/querystring.test.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Sprint-2/implement/querystring.test.js b/Sprint-2/implement/querystring.test.js
index 1b0bfca2e..1ffb17a7f 100644
--- a/Sprint-2/implement/querystring.test.js
+++ b/Sprint-2/implement/querystring.test.js
@@ -47,3 +47,7 @@ test("should store values of a key in an array when the key has 2 or more values
 test("returns an empty query string", () => {
   expect(parseQueryString("")).toEqual({});
 });
+
+test("handles a value with both + and percent-encoding", () => {
+  expect(parseQueryString("q=a+b%26c")).toEqual({q: "a b&c"});
+});
\ No newline at end of file

From 15fe8297ae109c1c1eedc1086da4916e666ca4ad Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 15:32:17 +0000
Subject: [PATCH 28/43] test: implement test for tally function with an empty
 array

---
 Sprint-2/implement/tally.test.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Sprint-2/implement/tally.test.js b/Sprint-2/implement/tally.test.js
index ca763c296..3f143e585 100644
--- a/Sprint-2/implement/tally.test.js
+++ b/Sprint-2/implement/tally.test.js
@@ -23,7 +23,10 @@ const tally = require("./tally.js");
 // Given an empty array
 // When passed to tally
 // Then it should return an empty object
-test.todo("tally on an empty array returns an empty object");
+test("tally on an empty array returns an empty object", () => {
+    expect(tally([])).toEqual({});
+});
+
 
 // Given an array with duplicate items
 // When passed to tally

From 8eb4f2df10de0ee40983c4d38e24cc33484bf723 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 15:34:15 +0000
Subject: [PATCH 29/43] test: fix indentation in tally test cases

---
 Sprint-2/implement/tally.test.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Sprint-2/implement/tally.test.js b/Sprint-2/implement/tally.test.js
index 3f143e585..01cf1a72b 100644
--- a/Sprint-2/implement/tally.test.js
+++ b/Sprint-2/implement/tally.test.js
@@ -24,9 +24,12 @@ const tally = require("./tally.js");
 // When passed to tally
 // Then it should return an empty object
 test("tally on an empty array returns an empty object", () => {
-    expect(tally([])).toEqual({});
+  expect(tally([])).toEqual({});
 });
 
+test("tally counts duplicate items", () => {
+  expect(tally(["a", "a", "a"])).toEqual({ a: 3 });
+});
 
 // Given an array with duplicate items
 // When passed to tally

From 967cdf663df2a238d8f71c1ae9cad3ad8835de43 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 15:35:57 +0000
Subject: [PATCH 30/43] test: add assertion for counting unique items in tally
 function

---
 Sprint-2/implement/tally.test.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Sprint-2/implement/tally.test.js b/Sprint-2/implement/tally.test.js
index 01cf1a72b..aba0c7fd0 100644
--- a/Sprint-2/implement/tally.test.js
+++ b/Sprint-2/implement/tally.test.js
@@ -29,6 +29,7 @@ test("tally on an empty array returns an empty object", () => {
 
 test("tally counts duplicate items", () => {
   expect(tally(["a", "a", "a"])).toEqual({ a: 3 });
+  expect(tally(["a", "a", "b", "c"])).toEqual({ a: 2, b: 1, c: 1 });
 });
 
 // Given an array with duplicate items

From 1492450412abd3a30a9c73a8614fe43974e0dc48 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 15:39:49 +0000
Subject: [PATCH 31/43] test: add tests for handling invalid input in tally
 function

---
 Sprint-2/implement/tally.test.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Sprint-2/implement/tally.test.js b/Sprint-2/implement/tally.test.js
index aba0c7fd0..47fa848d4 100644
--- a/Sprint-2/implement/tally.test.js
+++ b/Sprint-2/implement/tally.test.js
@@ -32,6 +32,12 @@ test("tally counts duplicate items", () => {
   expect(tally(["a", "a", "b", "c"])).toEqual({ a: 2, b: 1, c: 1 });
 });
 
+test("tally throws for invalid input", () => {
+  expect(() => tally("banana")).toThrow("tally requires an array");
+  expect(() => tally(42)).toThrow("tally requires an array");
+  expect(() => tally()).toThrow("tally requires an array");
+});
+
 // Given an array with duplicate items
 // When passed to tally
 // Then it should return counts for each unique item

From d2fb2602858de70184a0ef554db4484e6e130b35 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 15:40:17 +0000
Subject: [PATCH 32/43] refactor: remove unnecessary comments and documentation
 from tally test file

---
 Sprint-2/implement/tally.test.js | 30 ------------------------------
 1 file changed, 30 deletions(-)

diff --git a/Sprint-2/implement/tally.test.js b/Sprint-2/implement/tally.test.js
index 47fa848d4..c3b2efd54 100644
--- a/Sprint-2/implement/tally.test.js
+++ b/Sprint-2/implement/tally.test.js
@@ -1,28 +1,6 @@
 const tally = require("./tally.js");
 
-/**
- * tally array
- *
- * In this task, you'll need to implement a function called tally
- * that will take a list of items and count the frequency of each item
- * in an array
- *
- * For example:
- *
- * tally(['a']), target output: { a: 1 }
- * tally(['a', 'a', 'a']), target output: { a: 3 }
- * tally(['a', 'a', 'b', 'c']), target output: { a : 2, b: 1, c: 1 }
- */
 
-// Acceptance criteria:
-
-// Given a function called tally
-// When passed an array of items
-// Then it should return an object containing the count for each unique item
-
-// Given an empty array
-// When passed to tally
-// Then it should return an empty object
 test("tally on an empty array returns an empty object", () => {
   expect(tally([])).toEqual({});
 });
@@ -37,11 +15,3 @@ test("tally throws for invalid input", () => {
   expect(() => tally(42)).toThrow("tally requires an array");
   expect(() => tally()).toThrow("tally requires an array");
 });
-
-// Given an array with duplicate items
-// When passed to tally
-// Then it should return counts for each unique item
-
-// Given an invalid input like a string, a number, or no argument at all
-// When passed to tally
-// Then it should throw Error("tally requires an array")

From 77dc8de87ad725a9c2eceee951f857288bad87c4 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 15:48:11 +0000
Subject: [PATCH 33/43] feat: implement tally function to count occurrences in
 an array

---
 Sprint-2/implement/tally.js | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/Sprint-2/implement/tally.js b/Sprint-2/implement/tally.js
index f47321812..1e0a1fee6 100644
--- a/Sprint-2/implement/tally.js
+++ b/Sprint-2/implement/tally.js
@@ -1,3 +1,14 @@
-function tally() {}
+function tally(list) {
+  if (Array.isArray(list)) {
+    throw new Error("tally requires an array");
+  }
+
+  const counts = {};
+
+  for (const item of list) {
+    counts[item] = (counts[item] || 0) + 1;
+  }
+  return counts;
+}
 
 module.exports = tally;

From 5cb05eeaa896751b17bba48c0dba3b6e28c9756d Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 15:49:38 +0000
Subject: [PATCH 34/43] fix: correct condition to check if input is an array in
 tally function

---
 Sprint-2/implement/tally.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sprint-2/implement/tally.js b/Sprint-2/implement/tally.js
index 1e0a1fee6..380da62f5 100644
--- a/Sprint-2/implement/tally.js
+++ b/Sprint-2/implement/tally.js
@@ -1,5 +1,5 @@
 function tally(list) {
-  if (Array.isArray(list)) {
+  if (!Array.isArray(list)) {
     throw new Error("tally requires an array");
   }
 

From ef80285df3e2f027ec782ae685c976224d94505d Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 20:51:28 +0000
Subject: [PATCH 35/43] fix: correct implementation of invert function to
 properly swap keys and values

---
 Sprint-2/interpret/invert.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sprint-2/interpret/invert.js b/Sprint-2/interpret/invert.js
index bb353fb1f..782c12f53 100644
--- a/Sprint-2/interpret/invert.js
+++ b/Sprint-2/interpret/invert.js
@@ -10,7 +10,7 @@ function invert(obj) {
   const invertedObj = {};
 
   for (const [key, value] of Object.entries(obj)) {
-    invertedObj.key = value;
+    invertedObj[value] = key;
   }
 
   return invertedObj;

From d2795ffc27c1dffb0d10c93ffb15a5511bcb6dd8 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 20:56:57 +0000
Subject: [PATCH 36/43] fix: update module export for invert function

---
 Sprint-2/interpret/invert.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Sprint-2/interpret/invert.js b/Sprint-2/interpret/invert.js
index 782c12f53..1c06bfd8b 100644
--- a/Sprint-2/interpret/invert.js
+++ b/Sprint-2/interpret/invert.js
@@ -16,7 +16,10 @@ function invert(obj) {
   return invertedObj;
 }
 
+module.exports = invert;
+
 // a) What is the current return value when invert is called with { a : 1 }
+// Answer: {key: 1}
 
 // b) What is the current return value when invert is called with { a: 1, b: 2 }
 

From 6eff4d90a25fda39f9f4e0a3477f633000740aab Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 21:11:50 +0000
Subject: [PATCH 37/43] fix: update comments in invert function to clarify
 expected behavior and return values

---
 Sprint-2/interpret/invert.js | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Sprint-2/interpret/invert.js b/Sprint-2/interpret/invert.js
index 1c06bfd8b..62616fc6d 100644
--- a/Sprint-2/interpret/invert.js
+++ b/Sprint-2/interpret/invert.js
@@ -19,14 +19,26 @@ function invert(obj) {
 module.exports = invert;
 
 // a) What is the current return value when invert is called with { a : 1 }
+
 // Answer: {key: 1}
 
 // b) What is the current return value when invert is called with { a: 1, b: 2 }
 
+// Answer: {key: 2}
+
 // c) What is the target return value when invert is called with {a : 1, b: 2}
 
+// Answer: target is {"1": "a", "2": "b"}
+
 // c) What does Object.entries return? Why is it needed in this program?
 
+// Answer: Object.entries returns an array of [key, value] pairs, like [["a", 1]], ["b", 2], so the loop can grab both at once
+
 // d) Explain why the current return value is different from the target output
 
+// Answer: invertedObj.key = value writes a property literally named "key" on -
+// every pass, so each pairs overwrites the same one and only the last value survives
+
 // e) Fix the implementation of invert (and write tests to prove it's fixed!)
+
+// Answer: use brackets so the value becomes the new key: invertedObj[value] = key
\ No newline at end of file

From ad4efb5f22328a68831f80c526c95459069c686f Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 21:22:44 +0000
Subject: [PATCH 38/43] test: add unit test for invert function to verify
 key-value swapping

---
 Sprint-2/interpret/invert.test.js | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 Sprint-2/interpret/invert.test.js

diff --git a/Sprint-2/interpret/invert.test.js b/Sprint-2/interpret/invert.test.js
new file mode 100644
index 000000000..6f0b2d9de
--- /dev/null
+++ b/Sprint-2/interpret/invert.test.js
@@ -0,0 +1,5 @@
+const invert = require("./invert.js");
+
+test("swaps key with values", () => {
+    expect(invert({x: 1})).toEqual(({"10": "x", "20": "y"}));
+});
\ No newline at end of file

From e18c645d7e850d0702253cd618b1b82f45524e84 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 21:25:09 +0000
Subject: [PATCH 39/43] fix: add missing newline and correct syntax in invert
 test cases

---
 Sprint-2/interpret/invert.test.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Sprint-2/interpret/invert.test.js b/Sprint-2/interpret/invert.test.js
index 6f0b2d9de..8f2c57adb 100644
--- a/Sprint-2/interpret/invert.test.js
+++ b/Sprint-2/interpret/invert.test.js
@@ -2,4 +2,8 @@ const invert = require("./invert.js");
 
 test("swaps key with values", () => {
     expect(invert({x: 1})).toEqual(({"10": "x", "20": "y"}));
-});
\ No newline at end of file
+});
+
+test("handles single entry", () => {
+    expect(invert({a: 1})).toEqual({"1": "a"});
+}):
\ No newline at end of file

From 3deb65ce758d1aabb87f8a292eb7a01ca2b36c6a Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 21:25:27 +0000
Subject: [PATCH 40/43] fix: correct formatting and add missing newline in
 invert test cases

---
 Sprint-2/interpret/invert.test.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Sprint-2/interpret/invert.test.js b/Sprint-2/interpret/invert.test.js
index 8f2c57adb..7618c6907 100644
--- a/Sprint-2/interpret/invert.test.js
+++ b/Sprint-2/interpret/invert.test.js
@@ -1,9 +1,10 @@
 const invert = require("./invert.js");
 
 test("swaps key with values", () => {
-    expect(invert({x: 1})).toEqual(({"10": "x", "20": "y"}));
+  expect(invert({ x: 1 })).toEqual({ 10: "x", 20: "y" });
 });
 
 test("handles single entry", () => {
-    expect(invert({a: 1})).toEqual({"1": "a"});
-}):
\ No newline at end of file
+  expect(invert({ a: 1 })).toEqual({ 1: "a" });
+});
+

From 8ad64941925f07791f43c55102a1619bad987085 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 21:27:53 +0000
Subject: [PATCH 41/43] test: add unit test for handling empty object in invert
 function

---
 Sprint-2/interpret/invert.test.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Sprint-2/interpret/invert.test.js b/Sprint-2/interpret/invert.test.js
index 7618c6907..b2a310d72 100644
--- a/Sprint-2/interpret/invert.test.js
+++ b/Sprint-2/interpret/invert.test.js
@@ -8,3 +8,6 @@ test("handles single entry", () => {
   expect(invert({ a: 1 })).toEqual({ 1: "a" });
 });
 
+test("handles an empty object", () => {
+  expect(invert({})).toEqual({});
+});

From 4476d4a6d123deae8658a79b8a577e1f995138b5 Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 21:31:50 +0000
Subject: [PATCH 42/43] fix: correct expected output for key-value swapping
 test case

---
 Sprint-2/interpret/invert.test.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sprint-2/interpret/invert.test.js b/Sprint-2/interpret/invert.test.js
index b2a310d72..8228996f0 100644
--- a/Sprint-2/interpret/invert.test.js
+++ b/Sprint-2/interpret/invert.test.js
@@ -1,7 +1,7 @@
 const invert = require("./invert.js");
 
 test("swaps key with values", () => {
-  expect(invert({ x: 1 })).toEqual({ 10: "x", 20: "y" });
+  expect(invert({ x: 10, y: 20 })).toEqual({ 10: "x", 20: "y" });
 });
 
 test("handles single entry", () => {

From 5ab6b3e85504d9f0d7741be24a18b601644a9c2a Mon Sep 17 00:00:00 2001
From: MattCarolus10 <mattcarolus10@gmail.com>
Date: Fri, 6 Nov 2026 21:59:50 +0000
Subject: [PATCH 43/43] Remove prep files from sprint branch

---
 Sprint-2/prep/ordered-data.js            | 18 ----------------
 Sprint-2/prep/parse-query-string.js      | 15 -------------
 Sprint-2/prep/parse-query-string.test.js | 27 ------------------------
 prep/doubleAllNumbers.js                 | 13 ------------
 4 files changed, 73 deletions(-)
 delete mode 100644 Sprint-2/prep/ordered-data.js
 delete mode 100644 Sprint-2/prep/parse-query-string.js
 delete mode 100644 Sprint-2/prep/parse-query-string.test.js
 delete mode 100644 prep/doubleAllNumbers.js

diff --git a/Sprint-2/prep/ordered-data.js b/Sprint-2/prep/ordered-data.js
deleted file mode 100644
index 016c7f9b2..000000000
--- a/Sprint-2/prep/ordered-data.js
+++ /dev/null
@@ -1,18 +0,0 @@
-// const profileData = {
-//     firstName: "Franceso",
-//     lastName: "Leoni",
-//     age: 33,
-// }
-
-// // console.log(profileData.cityOfResidence);
-// profileData.cityOfResidence = "Manchester"
-// console.log(profileData.cityOfResidence);
-
-const object1 = {
-    firstName: "Franceso",
-    lastName: "Leoni",
-}
-
-const object2 = {};
-object2.firstName = "Franceso";
-object2.lastName = "Leoni";
\ No newline at end of file
diff --git a/Sprint-2/prep/parse-query-string.js b/Sprint-2/prep/parse-query-string.js
deleted file mode 100644
index 41c0b1f8b..000000000
--- a/Sprint-2/prep/parse-query-string.js
+++ /dev/null
@@ -1,15 +0,0 @@
-function parseQueryString(queryString) {
-  const queryParams = {};
-  if (queryString.length === 0) {
-    return queryParams;
-  }
-  const keyValuePairs = queryString.split("&");
-
-  for (const pair of keyValuePairs) {
-    const [key, value] = pair.split("=");
-    queryParams[key] = value;
-  }
-
-  return queryParams;
-}
-module.exports = parseQueryString;
diff --git a/Sprint-2/prep/parse-query-string.test.js b/Sprint-2/prep/parse-query-string.test.js
deleted file mode 100644
index 639d4baa5..000000000
--- a/Sprint-2/prep/parse-query-string.test.js
+++ /dev/null
@@ -1,27 +0,0 @@
-const parseQueryString = require("./parse-query-string.js");
-
-test("given a query string with no query parameter, return an empty object", () => {
-    const input = "";
-    const currentOutput =  parseQueryString(input);
-    const targetOutput = {};
-
-    expect(currentOutput).toEqual(targetOutput);
-});
-
-test("given a query string with one pair of query params, return them in object form", function () {
-    const input = "fruit=banana";
-    const currentOutput = parseQueryString(input);
-    const targetOutput = { fruit: "banana"};
-
-    expect(currentOutput).toEqual(targetOutput);
-
-});
-
-test("given a query string with multiple key-value pairs, returns them in object form", function () {
-  const input = "sort=lowest&colour=yellow";
-  const currentOutput = parseQueryString(input);
-  const targetOutput = { sort: "lowest", colour: "yellow" };
-
-  expect(currentOutput).toEqual(targetOutput);
-});
-
diff --git a/prep/doubleAllNumbers.js b/prep/doubleAllNumbers.js
deleted file mode 100644
index 58045564e..000000000
--- a/prep/doubleAllNumbers.js
+++ /dev/null
@@ -1,13 +0,0 @@
-function doubleAllNumbers() {
-  let doubledNumbers;
-
-  for (let n of numbers) {
-    doubledNumbers.push(n * 2);
-  }
-
-  return doubledNumbers;
-}
-
-const myNums = [10, 20, 30];
-doubleAllNumbers(myNums);
-console.log(myNums);