From ceb17df6b9755b5d03e2e693872c5a68691f5f47 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Mon, 6 Oct 2025 17:48:51 +0100
Subject: [PATCH 01/17] Refactor address.js file, accessing value of obj in js

---
 Sprint-2/debug/address.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Sprint-2/debug/address.js b/Sprint-2/debug/address.js
index 940a6af83..f69d67593 100644
--- a/Sprint-2/debug/address.js
+++ b/Sprint-2/debug/address.js
@@ -12,4 +12,9 @@ const address = {
   postcode: "XYZ 123",
 };
 
-console.log(`My house number is ${address[0]}`);
+// console.log(`My house number is ${address[0]}`);
+// is trying to access a property using address[0] and address is an object, not an array.
+// it will log undefined.
+// to access the houseNumber property, we should use dot notation or bracket notation with string.
+console.log(`My house number is ${address.houseNumber}`);
+console.log(`My house number is ${address["houseNumber"]}`);

From 4d1d8ac2de5f83b342202a5bdbc0510d152fa3d0 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Mon, 6 Oct 2025 20:24:55 +0100
Subject: [PATCH 02/17] Refactoring author.js file using for loop in obeject

---
 Sprint-2/debug/author.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Sprint-2/debug/author.js b/Sprint-2/debug/author.js
index 8c2125977..ebe39c1a4 100644
--- a/Sprint-2/debug/author.js
+++ b/Sprint-2/debug/author.js
@@ -11,6 +11,12 @@ const author = {
   alive: true,
 };
 
-for (const value of author) {
+// for (const value of author) {
+//   console.log(value);
+// }
+// It will log syntax Error because Objects themselves aren’t directly iterable Unlike arrays we need to converted
+// and then we can loop
+
+for (const value of Object.values(author)) {
   console.log(value);
 }

From 04fa1069e5b7355331992e3459a6b55ee0f73ef6 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Mon, 6 Oct 2025 20:43:46 +0100
Subject: [PATCH 03/17] debuging recipe.js file

---
 Sprint-2/debug/recipe.js | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/Sprint-2/debug/recipe.js b/Sprint-2/debug/recipe.js
index 6cbdd22cd..c06a2b8a9 100644
--- a/Sprint-2/debug/recipe.js
+++ b/Sprint-2/debug/recipe.js
@@ -10,6 +10,13 @@ const recipe = {
   ingredients: ["olive oil", "tomatoes", "salt", "pepper"],
 };
 
-console.log(`${recipe.title} serves ${recipe.serves}
-  ingredients:
-${recipe}`);
+// console.log(`${recipe.title} serves ${recipe.serves}
+//   ingredients:
+// ${recipe}`);
+// When you using  ${recipe} in a template literal javaScript tries to convert the entire object to a string
+// it will log  [object Object].
+console.log(`${recipe.title} serves ${recipe.serves}`);
+console.log("ingredients");
+recipe.ingredients.forEach((ingredient) => {
+  console.log(ingredient);
+});

From cd4cb2b536183dd3e3644890b816014940eb5f99 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Fri, 10 Oct 2025 19:20:58 +0100
Subject: [PATCH 04/17] refactoring adddress.js file

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

diff --git a/Sprint-2/debug/address.js b/Sprint-2/debug/address.js
index f69d67593..f0d22ec4f 100644
--- a/Sprint-2/debug/address.js
+++ b/Sprint-2/debug/address.js
@@ -1,9 +1,7 @@
 // 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
-
 const address = {
   houseNumber: 42,
   street: "Imaginary Road",
@@ -15,6 +13,7 @@ const address = {
 // console.log(`My house number is ${address[0]}`);
 // is trying to access a property using address[0] and address is an object, not an array.
 // it will log undefined.
-// to access the houseNumber property, we should use dot notation or bracket notation with string.
+// to access the houseNumber property, we should use dot notation or bracket notation with string,and either
+// way using  object.key or object["key"]
 console.log(`My house number is ${address.houseNumber}`);
 console.log(`My house number is ${address["houseNumber"]}`);

From 629cd62bedb5fdeaa060b811c6b25a3f7e35a72a Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Fri, 10 Oct 2025 20:34:25 +0100
Subject: [PATCH 05/17] implementing function that checks an object contains a
 particular property

---
 Sprint-2/implement/contains.js      |  6 ++++--
 Sprint-2/implement/contains.test.js | 19 +++++++++++++++----
 2 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/Sprint-2/implement/contains.js b/Sprint-2/implement/contains.js
index cd779308a..a3f2e101b 100644
--- a/Sprint-2/implement/contains.js
+++ b/Sprint-2/implement/contains.js
@@ -1,3 +1,5 @@
-function contains() {}
-
+function contains(obj, prop) {
+  return obj && typeof obj === "object" && prop in obj;
+}
+// console.log(contains(({ a: 1, b: 2 }, "c")));
 module.exports = contains;
diff --git a/Sprint-2/implement/contains.test.js b/Sprint-2/implement/contains.test.js
index 326bdb1f2..b6390c63b 100644
--- a/Sprint-2/implement/contains.test.js
+++ b/Sprint-2/implement/contains.test.js
@@ -16,20 +16,31 @@ as the object doesn't contains a key of 'c'
 // 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
+test("contains returns true for existing property", () => {
+  expect(contains({ a: 1, b: 2 }, "a")).toBe(true);
+});
 
 // 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
 // Then it should return true
-
+test("Given an object with an existing property should return true", () => {
+  expect(contains({ a: 1, k: 2 }, "k")).toBe(true);
+});
 // Given an object with properties
 // When passed to contains with a non-existent property name
 // Then it should return false
-
+test("Given an object with none-existing property should return false", () => {
+  expect(contains({ a: 1, b: 2 }, "c")).toBe(false);
+});
 // Given invalid parameters like an array
 // When passed to contains
 // Then it should return false or throw an error
+test("Given an object with an existing property should return true", () => {
+  expect(contains(["k", "a"], "k")).toBe(false);
+});

From 36e36efa225153e0a0630ac94bb40a0391760331 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Sat, 11 Oct 2025 11:26:15 +0100
Subject: [PATCH 06/17] implementing function to lookup object of key value
 pairs from an array of code pairs

---
 Sprint-2/implement/lookup.js      | 16 +++++++--
 Sprint-2/implement/lookup.test.js | 54 ++++++++++++-------------------
 Sprint-2/implement/querystring.js | 14 ++++++--
 3 files changed, 45 insertions(+), 39 deletions(-)

diff --git a/Sprint-2/implement/lookup.js b/Sprint-2/implement/lookup.js
index a6746e07f..545554a93 100644
--- a/Sprint-2/implement/lookup.js
+++ b/Sprint-2/implement/lookup.js
@@ -1,5 +1,15 @@
-function createLookup() {
-  // implementation here
+function createLookup(nestedArr) {
+  const noneNesArr = nestedArr.flat(Infinity);
+  const result = {};
+  for (let i = 0; i < noneNesArr.length; i += 2) {
+    const country = noneNesArr[i];
+    const currency = noneNesArr[i + 1];
+    result[country] = currency;
+  }
+  return result;
 }
-
+createLookup([
+  ["US", "USD"],
+  ["CA", "CAD"],
+]);
 module.exports = createLookup;
diff --git a/Sprint-2/implement/lookup.test.js b/Sprint-2/implement/lookup.test.js
index 547e06c5a..0dd9d9127 100644
--- a/Sprint-2/implement/lookup.test.js
+++ b/Sprint-2/implement/lookup.test.js
@@ -1,35 +1,23 @@
 const createLookup = require("./lookup.js");
 
-test.todo("creates a country currency code lookup for multiple codes");
-
-/*
-
-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'
- }
-*/
+// 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']]
+test("creates a country currency code lookup for multiple codes", () => {
+  expect(
+    createLookup([
+      ["US", "USD"],
+      ["CA", "CAD"],
+    ])
+  ).toEqual({ US: "USD", CA: "CAD" });
+});
+
+test("creates a country currency code with mixed nesting and extra layers lookup for multiple codes", () => {
+  expect(
+    createLookup([["US", "USD"], [["CA", "CAD"]], [[["JP", "JPY"]]]])
+  ).toEqual({ US: "USD", CA: "CAD", JP: "JPY" });
+});
diff --git a/Sprint-2/implement/querystring.js b/Sprint-2/implement/querystring.js
index 45ec4e5f3..f37b97037 100644
--- a/Sprint-2/implement/querystring.js
+++ b/Sprint-2/implement/querystring.js
@@ -3,14 +3,22 @@ function parseQueryString(queryString) {
   if (queryString.length === 0) {
     return queryParams;
   }
+
   const keyValuePairs = queryString.split("&");
 
   for (const pair of keyValuePairs) {
-    const [key, value] = pair.split("=");
-    queryParams[key] = value;
+    const indexOfEquals = pair.indexOf("=");
+
+    if (indexOfEquals === -1) {
+      queryParams[pair] = "";
+    } else {
+      const key = pair.slice(0, indexOfEquals);
+      const value = pair.slice(indexOfEquals + 1);
+      queryParams[key] = value;
+    }
   }
 
   return queryParams;
 }
-
+console.log(parseQueryString("equation=x=y+1"));
 module.exports = parseQueryString;

From 8bd2a03547e028dd4e7184c9860bf12af0115700 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Sat, 11 Oct 2025 12:56:31 +0100
Subject: [PATCH 07/17] implementing function that takes all a list of items
 and count the freguency of each items in tally.js file

---
 Sprint-2/implement/tally.js      | 12 ++++++++++--
 Sprint-2/implement/tally.test.js | 14 ++++++++++++--
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/Sprint-2/implement/tally.js b/Sprint-2/implement/tally.js
index f47321812..22d08dda3 100644
--- a/Sprint-2/implement/tally.js
+++ b/Sprint-2/implement/tally.js
@@ -1,3 +1,11 @@
-function tally() {}
-
+function tally(arr) {
+  const output = {};
+  if (!Array.isArray(arr)) {
+    throw new Error("Input must be an array");
+  }
+  arr.forEach((element) => {
+    output[element] = (output[element] || 0) + 1;
+  });
+  return output;
+}
 module.exports = tally;
diff --git a/Sprint-2/implement/tally.test.js b/Sprint-2/implement/tally.test.js
index 2ceffa8dd..3de989f8f 100644
--- a/Sprint-2/implement/tally.test.js
+++ b/Sprint-2/implement/tally.test.js
@@ -19,16 +19,26 @@ const tally = require("./tally.js");
 // Given a function called tally
 // When passed an array of items
 // Then it should return an object containing the count for each unique item
-
+test("Given a function tally(['a']), target output should be { a: 1 }", () => {
+  expect(tally(["a", "a", "a"])).toEqual({ a: 3 });
+});
 // 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, target output should be {}", () => {
+  expect(tally([])).toEqual({});
+});
 // Given an array with duplicate items
 // When passed to tally
 // Then it should return counts for each unique item
+test("Given a function tally(['a']), target output should be { a: 1 }", () => {
+  expect(tally(["a", "a", "b", "c"])).toEqual({ a: 2, b: 1, c: 1 });
+});
 
 // Given an invalid input like a string
 // When passed to tally
 // Then it should throw an error
+test("Given an invalid input like a string,Then it should throw an error", () => {
+  expect(() => tally("string")).toThrow("Input must be an array");
+});

From 62191e11cc26efddf9fe343ac4bcd4219e6eb023 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Sat, 11 Oct 2025 13:59:33 +0100
Subject: [PATCH 08/17] refactoring and explaining how the invert.js file work

---
 Sprint-2/interpret/invert.js | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/Sprint-2/interpret/invert.js b/Sprint-2/interpret/invert.js
index bb353fb1f..a7e7a557e 100644
--- a/Sprint-2/interpret/invert.js
+++ b/Sprint-2/interpret/invert.js
@@ -10,20 +10,25 @@ function invert(obj) {
   const invertedObj = {};
 
   for (const [key, value] of Object.entries(obj)) {
-    invertedObj.key = value;
+    invertedObj[value] = key;
   }
 
   return invertedObj;
 }
 
 // a) What is the current return value when invert is called with { a : 1 }
-
+// {"1":"a"}
 // b) What is the current return value when invert is called with { a: 1, b: 2 }
-
+// { "1": "a", "2": "b" }
 // c) What is the target return value when invert is called with {a : 1, b: 2}
-
+// { a: 1, b: 2 }
 // c) What does Object.entries return? Why is it needed in this program?
+// returns an array of a given object's which is  own enumerable string-keyed property key-value pairs.
 
 // d) Explain why the current return value is different from the target output
-
+// The code uses invertedObj.key = value which creates a property literally named "key" instead of dynamically using the value of key
 // e) Fix the implementation of invert (and write tests to prove it's fixed!)
+console.log(invert({ a: 2, b: 3 })); // ===> { '2': 'a', '3': 'b' }
+console.log(invert({ b: 1, c: 2 })); // ===> { '1': 'b', '2': 'c' }
+console.log(invert({ code: "war" })); // ===> { war: 'code'
+console.log(invert({})); // ===> {}

From f3242954476c6bfa69f061d055c635bfd54ab427 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Sun, 12 Oct 2025 22:16:08 +0100
Subject: [PATCH 09/17] refactoring and iterpreting mode.js and till.js files

---
 Sprint-2/stretch/count-words.js | 14 ++++++++++++++
 Sprint-2/stretch/mode.js        |  6 ++++--
 Sprint-2/stretch/till.js        | 34 ++++++++++++++++++++++++++++++++-
 3 files changed, 51 insertions(+), 3 deletions(-)

diff --git a/Sprint-2/stretch/count-words.js b/Sprint-2/stretch/count-words.js
index 8e85d19d7..5299c50bf 100644
--- a/Sprint-2/stretch/count-words.js
+++ b/Sprint-2/stretch/count-words.js
@@ -26,3 +26,17 @@
 
 3. Order the results to find out which word is the most common in the input
 */
+function countWords(str) {
+  const obj = {};
+  let tidyStr = str.replace(/[!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~]/g, "");
+  let arr = tidyStr.toLowerCase().split(" ");
+  arr.forEach((element) => {
+    if (obj[element]) {
+      obj[element] += 1;
+    } else {
+      obj[element] = 1;
+    }
+  });
+  return obj;
+}
+countWords("you and mE anD you me! me");
diff --git a/Sprint-2/stretch/mode.js b/Sprint-2/stretch/mode.js
index 3f7609d79..38bbe48de 100644
--- a/Sprint-2/stretch/mode.js
+++ b/Sprint-2/stretch/mode.js
@@ -19,8 +19,11 @@ function calculateMode(list) {
 
     freqs.set(num, (freqs.get(num) || 0) + 1);
   }
+  return highestFreg(freqs);
+}
 
-  // Find the value with the highest frequency
+// Find the value with the highest frequency
+function highestFreg(freqs) {
   let maxFreq = 0;
   let mode;
   for (let [num, freq] of freqs) {
@@ -32,5 +35,4 @@ function calculateMode(list) {
 
   return maxFreq === 0 ? NaN : mode;
 }
-
 module.exports = calculateMode;
diff --git a/Sprint-2/stretch/till.js b/Sprint-2/stretch/till.js
index 6a08532e7..4cbe47135 100644
--- a/Sprint-2/stretch/till.js
+++ b/Sprint-2/stretch/till.js
@@ -8,7 +8,8 @@ function totalTill(till) {
   let total = 0;
 
   for (const [coin, quantity] of Object.entries(till)) {
-    total += coin * quantity;
+    const formatedCoin = parseInt(coin);
+    total += formatedCoin * quantity;
   }
 
   return `£${total / 100}`;
@@ -20,12 +21,43 @@ const till = {
   "50p": 4,
   "20p": 10,
 };
+
 const totalAmount = totalTill(till);
 
 // a) What is the target output when totalTill is called with the till object
+// Sum = 10 + 30 + 200 + 200 = 440p → £4.40
 
 // b) Why do we need to use Object.entries inside the for...of loop in this function?
+//  it used to  convert the object into an array of key-value pairs.
 
 // c) What does coin * quantity evaluate to inside the for...of loop?
+// Coin is a string like "1p", "5p", etc. Multiplying a string that includes non-numeric characters by a number resulting into a NaN which is not a number.
 
 // d) Write a test for this function to check it works and then fix the implementation of totalTill
+const till1 = {
+  "11p": 5,
+  "7p": 4,
+  "40p": 3,
+  "80p": 1,
+};
+
+const expected1 = "£2.83";
+const actual1 = totalTill(till1);
+console.assert(
+  actual1 === expected1,
+  `Expected ${expected1} but got ${actual1}`
+);
+
+const till2 = {
+  "21p": 9,
+  "3p": 2,
+  "9p": 9,
+  "44p": 7,
+};
+
+const expected2 = "£5.84";
+const actual2 = totalTill(till2);
+console.assert(
+  actual2 === expected2,
+  `Expected ${expected2} but got ${actual2}`
+);

From 8fe46af1a133665b989b6588602d7a3739b71cea Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Sun, 12 Oct 2025 22:20:49 +0100
Subject: [PATCH 10/17] sprint-2 exercies has been completed

---
 Sprint-2/debug/recipe.js               |  1 -
 Sprint-2/implement/querystring.test.js | 36 +++++++++++++++++++++++---
 Sprint-2/stretch/count-words.js        |  2 +-
 3 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/Sprint-2/debug/recipe.js b/Sprint-2/debug/recipe.js
index c06a2b8a9..c46604ce8 100644
--- a/Sprint-2/debug/recipe.js
+++ b/Sprint-2/debug/recipe.js
@@ -3,7 +3,6 @@
 // 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?
-
 const recipe = {
   title: "bruschetta",
   serves: 2,
diff --git a/Sprint-2/implement/querystring.test.js b/Sprint-2/implement/querystring.test.js
index 3e218b789..d2e878ed9 100644
--- a/Sprint-2/implement/querystring.test.js
+++ b/Sprint-2/implement/querystring.test.js
@@ -3,10 +3,40 @@
 // Below is one test case for an edge case the implementation doesn't handle well.
 // Fix the implementation for this test, and try to think of as many other edge cases as possible - write tests and fix those too.
 
-const parseQueryString = require("./querystring.js")
-
+const parseQueryString = require("./querystring.js");
 test("parses querystring values containing =", () => {
   expect(parseQueryString("equation=x=y+1")).toEqual({
-    "equation": "x=y+1",
+    equation: "x=y+1",
+  });
+});
+test("parses simple key=value pairs", () => {
+  expect(parseQueryString("name=John&age=30")).toEqual({
+    name: "John",
+    age: "30",
+  });
+});
+
+test("parses value containing '='", () => {
+  expect(parseQueryString("equation=x=y+1")).toEqual({
+    equation: "x=y+1",
+  });
+});
+
+test("handles keys with no value", () => {
+  expect(parseQueryString("flag&key=value")).toEqual({
+    flag: "",
+    key: "value",
+  });
+});
+
+test("handles multiple '=' in value", () => {
+  expect(parseQueryString("data=key=value=extra")).toEqual({
+    data: "key=value=extra",
+  });
+});
+
+test("handles keys with empty values", () => {
+  expect(parseQueryString("name=")).toEqual({
+    name: "",
   });
 });
diff --git a/Sprint-2/stretch/count-words.js b/Sprint-2/stretch/count-words.js
index 5299c50bf..3b8043a9e 100644
--- a/Sprint-2/stretch/count-words.js
+++ b/Sprint-2/stretch/count-words.js
@@ -39,4 +39,4 @@ function countWords(str) {
   });
   return obj;
 }
-countWords("you and mE anD you me! me");
+// countWords("you and mE anD you me! me");

From c995a12c828b469b477c6de899ed0504f180dbb8 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Thu, 6 Nov 2025 10:17:32 +0000
Subject: [PATCH 11/17] updating test file

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

diff --git a/Sprint-2/implement/contains.test.js b/Sprint-2/implement/contains.test.js
index b6390c63b..c835f7460 100644
--- a/Sprint-2/implement/contains.test.js
+++ b/Sprint-2/implement/contains.test.js
@@ -20,11 +20,11 @@ test("contains returns true for existing property", () => {
   expect(contains({ a: 1, b: 2 }, "a")).toBe(true);
 });
 
-// Given an empty object
+// Given invalid parameters like an array
 // 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);
 });
 // Given an object with properties
 // When passed to contains with an existing property name

From 280a02cbfdc31c003c668a2eb4b4602939ae2464 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Thu, 6 Nov 2025 10:22:28 +0000
Subject: [PATCH 12/17] renaming parameter name to be more meaningful

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

diff --git a/Sprint-2/implement/contains.js b/Sprint-2/implement/contains.js
index a3f2e101b..fcda136fa 100644
--- a/Sprint-2/implement/contains.js
+++ b/Sprint-2/implement/contains.js
@@ -1,5 +1,5 @@
-function contains(obj, prop) {
-  return obj && typeof obj === "object" && prop in obj;
+function contains(obj, propertyName) {
+  return obj && typeof obj === "object" && propertyName in obj;
 }
 // console.log(contains(({ a: 1, b: 2 }, "c")));
 module.exports = contains;

From b4e53d07e452dd3d6e8508489c7edd386909f510 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Thu, 6 Nov 2025 10:40:59 +0000
Subject: [PATCH 13/17] deleting an nessessery flattening array

---
 Sprint-2/implement/lookup.js      | 5 +----
 Sprint-2/implement/lookup.test.js | 9 ++++++---
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/Sprint-2/implement/lookup.js b/Sprint-2/implement/lookup.js
index 545554a93..5029515f6 100644
--- a/Sprint-2/implement/lookup.js
+++ b/Sprint-2/implement/lookup.js
@@ -1,9 +1,6 @@
 function createLookup(nestedArr) {
-  const noneNesArr = nestedArr.flat(Infinity);
   const result = {};
-  for (let i = 0; i < noneNesArr.length; i += 2) {
-    const country = noneNesArr[i];
-    const currency = noneNesArr[i + 1];
+  for (const [country, currency] of nestedArr) {
     result[country] = currency;
   }
   return result;
diff --git a/Sprint-2/implement/lookup.test.js b/Sprint-2/implement/lookup.test.js
index 0dd9d9127..761632b39 100644
--- a/Sprint-2/implement/lookup.test.js
+++ b/Sprint-2/implement/lookup.test.js
@@ -16,8 +16,11 @@ test("creates a country currency code lookup for multiple codes", () => {
   ).toEqual({ US: "USD", CA: "CAD" });
 });
 
-test("creates a country currency code with mixed nesting and extra layers lookup for multiple codes", () => {
+test("creates a lookup for European and Asian countries", () => {
   expect(
-    createLookup([["US", "USD"], [["CA", "CAD"]], [[["JP", "JPY"]]]])
-  ).toEqual({ US: "USD", CA: "CAD", JP: "JPY" });
+    createLookup([
+      ["FR", "EUR"],
+      ["IN", "INR"],
+    ])
+  ).toEqual({ FR: "EUR", IN: "INR" });
 });

From a3833b1302b4fb496128762e24f8e2a464e6c5ca Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Thu, 6 Nov 2025 10:47:13 +0000
Subject: [PATCH 14/17] making the test name align with the test requirement in
 tally.test file

---
 Sprint-2/implement/lookup.js | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/Sprint-2/implement/lookup.js b/Sprint-2/implement/lookup.js
index 5029515f6..af77024a6 100644
--- a/Sprint-2/implement/lookup.js
+++ b/Sprint-2/implement/lookup.js
@@ -5,8 +5,4 @@ function createLookup(nestedArr) {
   }
   return result;
 }
-createLookup([
-  ["US", "USD"],
-  ["CA", "CAD"],
-]);
 module.exports = createLookup;

From 81078b810eda4d06d4583dd37c96f4c63b23dda0 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Thu, 6 Nov 2025 10:54:03 +0000
Subject: [PATCH 15/17] updating tall.test file

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

diff --git a/Sprint-2/implement/tally.test.js b/Sprint-2/implement/tally.test.js
index 3de989f8f..ec2584c3c 100644
--- a/Sprint-2/implement/tally.test.js
+++ b/Sprint-2/implement/tally.test.js
@@ -19,20 +19,19 @@ const tally = require("./tally.js");
 // Given a function called tally
 // When passed an array of items
 // Then it should return an object containing the count for each unique item
-test("Given a function tally(['a']), target output should be { a: 1 }", () => {
+test("Given a function called tally, should return an object containing the count for each unique item", () => {
   expect(tally(["a", "a", "a"])).toEqual({ a: 3 });
 });
 // 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, target output should be {}", () => {
+test("Given an empty array [], should returns an empty object {}", () => {
   expect(tally([])).toEqual({});
 });
 // Given an array with duplicate items
 // When passed to tally
 // Then it should return counts for each unique item
-test("Given a function tally(['a']), target output should be { a: 1 }", () => {
+test("Given an array with duplicate items, should return counts for each unique item", () => {
   expect(tally(["a", "a", "b", "c"])).toEqual({ a: 2, b: 1, c: 1 });
 });
 

From 3aac8f892885367a4294ecedc296b49770ffc09e Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Thu, 6 Nov 2025 11:03:07 +0000
Subject: [PATCH 16/17] updating split to handle multiple consecutive spaces
 correctly

---
 Sprint-2/stretch/count-words.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sprint-2/stretch/count-words.js b/Sprint-2/stretch/count-words.js
index 3b8043a9e..5e936ba17 100644
--- a/Sprint-2/stretch/count-words.js
+++ b/Sprint-2/stretch/count-words.js
@@ -29,7 +29,7 @@
 function countWords(str) {
   const obj = {};
   let tidyStr = str.replace(/[!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~]/g, "");
-  let arr = tidyStr.toLowerCase().split(" ");
+  let arr = tidyStr.toLowerCase().split(/\s+/);
   arr.forEach((element) => {
     if (obj[element]) {
       obj[element] += 1;

From 772e1e01875bb2ebc5f66afe36879815583c4f23 Mon Sep 17 00:00:00 2001
From: shreefAhmedM <livecoding.33@gmail.com>
Date: Thu, 6 Nov 2025 11:11:28 +0000
Subject: [PATCH 17/17] fixing spelling mistake highestFreq insted of
 highestFreg

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

diff --git a/Sprint-2/stretch/mode.js b/Sprint-2/stretch/mode.js
index 38bbe48de..b73a52eb4 100644
--- a/Sprint-2/stretch/mode.js
+++ b/Sprint-2/stretch/mode.js
@@ -19,11 +19,11 @@ function calculateMode(list) {
 
     freqs.set(num, (freqs.get(num) || 0) + 1);
   }
-  return highestFreg(freqs);
+  return highestFreq(freqs);
 }
 
 // Find the value with the highest frequency
-function highestFreg(freqs) {
+function highestFreq(freqs) {
   let maxFreq = 0;
   let mode;
   for (let [num, freq] of freqs) {