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Commit a06d324

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feat: Implement test cases (arr.exercise 21)
- implement test cases - correct typos and minor logic errors (optimizing the order of operationst) - all tests pass successfully
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‎README.md‎

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@@ -326,7 +326,7 @@ These exercises were developed as part of:
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| 18 | [Kubrick Filmography](#exercise-arr-18-kubrick-filmography) | ✔️ 🧪 | [Solution](./array-exercises/18_kubrickFilmography.js) |
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| 19 | [Literature Analysis](#exercise-arr-19-literature-analysis) | ✔️ 🧪 | [Solution](./array-exercises/19_literatureAnalysis.js) |
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| 20 | [Space Missions](#exercise-arr-20-space-missions) | ⏳ | [Solution](./array-exercises/20_spaceMissions.js) |
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| 21 | [Manipulation Challenges](#exercise-arr-21-manipulation-challenge) | ✔️ | [Solution](./array-exercises/21_manipulationChallenges.js) |
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| 21 | [Manipulation Challenges](#exercise-arr-21-manipulation-challenge) | ✔️ 🧪 | [Solution](./array-exercises/21_manipulationChallenges.js) |
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‎array-exercises/21_manipulationChallenges.js‎

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@@ -31,8 +31,8 @@ const filteredNumbers = mixedArray.filter((item) => (typeof(item) == 'number'));
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console.log('Only numbers from mixed array:',filteredNumbers);
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const mappedString = filteredNumbers.map((number) => number=('Number:'+number.toString()));
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console.log(' Numbers converted to a string:', mappedString);
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const mappedStrings = filteredNumbers.map((number) => number=('Number:'+number.toString()));
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console.log(' Numbers converted to a string:', mappedStrings);
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// Part II - Reduction & Calculation
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@@ -68,7 +68,7 @@ mixedArray.forEach((item) => {
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let chainedResult =
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mixedArray.filter((item) => typeof(item)==='number')
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.map((item) => 'Number: '+item);
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.map((item) => 'Number: '+item);
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console.log(`Array of numbers converted to strings (by chaining methods):`,chainedResult);
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console.groupEnd();
@@ -107,7 +107,8 @@ console.log('Total number of numbers in the array \n- with .reduce(): ',countNum
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console.log('✨ Original filtered numbers:',filteredNumbers);
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const sortedDescending=filteredNumbers.sort((a,b)=> (b-a));
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const filterNumbers=[...filteredNumbers]
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const sortedDescending=filterNumbers.sort((a,b)=> (b-a));
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console.log(`Filtered numbers in descending order: `,sortedDescending);
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// 3 - Unique Collection
@@ -135,15 +136,15 @@ console.log('Unique elements - with reduce():\n',uniqueE);
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console.log('✨ Original mixed array:',mixedArray);
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const transformedMixedAray = mixedArray.map((element)=> {
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const transformedMixedArray = mixedArray.map((element)=> {
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if (typeof(element) =='number'){
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return element * element;
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}else{
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return element.toUpperCase();
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}
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});
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console.log ('Transformed mixed array \n(strings to uppercase, numbers squared):');
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console.log(transformedMixedAray);
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console.log(transformedMixedArray);
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console.groupEnd();
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// <--- SCORE ANALYSIS --->
@@ -188,3 +189,70 @@ uniqueSortedScores.sort((a,b)=>b-a);
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console.log(`Only uniques values (from highest to lowest): `, uniqueSortedScores);
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console.groupEnd();
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// <--- TEST CASES --->
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console.log('Test Cases');
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// Helper function for asserting equality
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function assertEqual(actual, expected, testName) {
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const areArraysEqual = (arr1, arr2) => {
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if (!Array.isArray(arr1) || !Array.isArray(arr2)) return actual === expected;
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if (arr1.length !== arr2.length) return false;
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for (let i = 0; i < arr1.length; i++) {
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if (arr1[i] !== arr2[i]) return false;
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}
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return true;
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};
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if (areArraysEqual(actual, expected)) {
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console.log(`✅ PASS: ${testName}`);
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} else {
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console.error(`❌ FAIL: ${testName} - Expected: ${JSON.stringify(expected)}, Got: ${JSON.stringify(actual)}`);
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}
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}
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// --- Warm-up Exercise Tests ---
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// Assuming you store the results in `doubledFor` and `doubledMap`
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// Example: const doubledFor = [2, 4, 6, 8, 10];
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// Example: const doubledMap = [2, 4, 6, 8, 10];
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assertEqual(doubledFor, [2, 4, 6, 8, 10], "Warm-up: doubledFor using for loop");
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assertEqual(doubledMap, [2, 4, 6, 8, 10], "Warm-up: doubledMap using .map()");
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// --- Easy Challenge Tests ---
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// Assuming you store the results in `filteredNumbers`, `mappedStrings`, `totalSum`, `largestNumber`
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// Example: const filteredNumbers = [10, 25, 42, 15, 30];
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// Example: const mappedStrings = ['Number: 10', 'Number: 25', 'Number: 42', 'Number: 15', 'Number: 30'];
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// Example: const totalSum = 122;
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// Example: const largestNumber = 42;
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assertEqual(filteredNumbers, [10, 25, 42, 15, 30], "Easy Challenge: filteredNumbers");
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assertEqual(mappedStrings, ['Number: 10', 'Number: 25', 'Number: 42', 'Number: 15', 'Number: 30'], "Easy Challenge: mappedStrings");
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assertEqual(totalSum, 122, "Easy Challenge: totalSum");
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assertEqual(largestNumber, 42, "Easy Challenge: largestNumber");
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// --- Medium Challenge Tests ---
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// Assuming you store the result in `chainedResult`
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// Example: const chainedResult = ['Number: 25', 'Number: 42', 'Number: 15', 'Number: 30'];
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assertEqual(chainedResult, ['Number: 10', 'Number: 25', 'Number: 42', 'Number: 15', 'Number: 30'], "Medium Challenge: chainedResult");
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// Note: Part 3 (forEach) involves console logging, which is visually verified.
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// --- Choose & Use Challenge Tests ---
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// Assuming you store the results in `numericCount`, `sortedDescending`, `uniqueElements`, `transformedMixedArray`
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// Example: const numericCount = 5;
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// Example: const sortedDescending = [42, 30, 25, 15, 10];
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// Example: const uniqueElements = ['a', 'b', 'c', 'd'];
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// Example: const transformedMixedArray = [100, 'APPLE', 625, 1764, 'BANANA', 225, 900, 'CHERRY'];
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assertEqual(numericCount, 5, "Choose & Use: Challenge 1 (Value Count)");
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assertEqual(sortedDescending, [42, 30, 25, 15, 10], "Choose & Use: Challenge 2 (Descending Order)");
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assertEqual(uniqueElements, ['a', 'b', 'c', 'd'], "Choose & Use: Challenge 3 (Unique Collection)");
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assertEqual(transformedMixedArray, [100, 'APPLE', 625, 1764, 'BANANA', 225, 900, 'CHERRY'], "Choose & Use: Challenge 4 (Mixed Transformation)");
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// --- Advanced Challenge Tests ---
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// Assuming you store the results in `sumOfFilteredScores`, `countOf25`, `uniqueSortedScores`
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// Example: const sumOfFilteredScores = 230;
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// Example: const countOf25 = 3;
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// Example: const uniqueSortedScores = [60, 50, 45, 25, 15, 10, 5];
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assertEqual(sumOfFilteredScores, 230, "Advanced Challenge: Challenge 1 (Filtering and Summation)");
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assertEqual(countOf25, 3, "Advanced Challenge: Challenge 2 (Counting Occurrences)");
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assertEqual(uniqueSortedScores, [60, 50, 45, 25, 15, 10, 5], "Advanced Challenge: Challenge 3 (Transformation and Uniqueness)");
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