Added S62

individual/fullstack/s62/.gitignore

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+/node_modules

individual/fullstack/s62/.gitlab-ci.yml

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+image: node:latest
+
+stages:
+  - test
+
+test:
+  stage: test
+  script:
+    - npm install
+    - npm test

individual/fullstack/s62/README.md

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+To start using the built-in tests, run <code>npm install</code> first then issue the <code>npm test</code> at the root directory of this project.
+
+WARNING: Do not change any code inside <code>test.js</code>.
+
+[Link to Solution](https://gitlab.com/zuitt-coding-bootcamp-curricula/courses/wdc028v1.5a/-/tree/main/fullstack/s52-solution)

individual/fullstack/s62/index.js

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+function countLetter(letter, sentence) {
+    let result = 0;
+
+    if (typeof letter !== 'string' || letter.length !== 1) {
+        return undefined; 
+    }
+
+    for (let i = 0; i < sentence.length; i++) {
+        if (sentence[i] === letter) {
+            result++;
+        }
+    }
+
+    return result;
+}
+
+
+function isIsogram(text) {
+
+    // Convert the text to lowercase to disregard casing.
+    text = text.toLowerCase();
+
+    let seenLetters = {};
+
+    for (let char of text) {
+        if (seenLetters[char]) {
+            return false;
+        }
+
+        seenLetters[char] = true;
+    }
+
+    return true;
+}
+
+
+function purchase(age, price) {
+
+    if (age < 13) {
+        return undefined;
+    }
+
+    if (age >= 13 && age <= 21 || age >= 65) {
+        let discountedPrice = price * 0.8;
+        return discountedPrice.toFixed(2);
+    }
+
+    return price.toFixed(2);
+}
+
+
+
+function findHotCategories(items) {
+
+    let hotCategories = {};
+
+    for (let item of items) {
+        if (item.stocks === 0) {
+            hotCategories[item.category] = true;
+        }
+    }
+
+    let result = Object.keys(hotCategories);
+
+    return result;
+}
+
+
+function findFlyingVoters(candidateA, candidateB) {
+
+    let setA = new Set(candidateA);
+    let setB = new Set(candidateB);
+
+    let commonVoters = [...setA].filter(voter => setB.has(voter));
+
+    return commonVoters;
+}
+
+
+module.exports = {
+    countLetter,
+    isIsogram,
+    purchase,
+    findHotCategories,
+    findFlyingVoters
+};

individual/fullstack/s62/package.json

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+{
+  "name": "s52",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "jest"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "jest": "^26.6.3"
+  }
+}

individual/fullstack/s62/test.js

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+// This is the file to check whether your answer is correct or wrong.
+// Do not change anything in this file.
+
+const assert = require('assert');
+const source = require('./index');
+
+describe('[1] Count letters in a sentence.', function() {
+    const validLetter = 'o';
+    const invalidLetter = 'abc';
+    const sentence = 'The quick brown fox jumps over the lazy dog';
+
+    it('Invalid letter returns undefined.', function() {
+        const result = source.countLetter(invalidLetter, sentence);
+        expect(result).toBeUndefined();
+    });
+
+    it('Valid letter returns number of occurrence.', function() {
+        const result = source.countLetter(validLetter, sentence);
+        expect(result).toEqual(4);
+    });
+});
+
+describe('[2] Check isogram.', function() {
+    const isogram = 'Machine';
+    const notIsogram = 'Hello';
+
+    it('Returns true if a word is an isogram.', function() {
+        const result = source.isIsogram(isogram);
+        expect(result).toEqual(true);
+    });
+
+    it('Returns false if a word is not an isogram.', function() {
+        const result = source.isIsogram(notIsogram);
+        expect(result).toEqual(false);
+    });
+});
+
+describe('[3] Purchase goods.', function() {
+    const price = 109.4356;
+    const discountedPrice = price * 0.8;
+    const roundedPrice = discountedPrice.toFixed(2);
+
+    it('Returns undefined for students aged below 13.', function() {
+        const result = source.purchase(12, price);
+        expect(result).toBeUndefined();
+    });
+
+    it('Returns discounted price (rounded off) for students aged 13 to 21.', function() {
+        const result = source.purchase(15, price);
+        expect(result).toEqual(roundedPrice);
+    });
+
+    it('Returns discounted price (rounded off) for senior citizens.', function() {
+        const result = source.purchase(72, price);
+        expect(result).toEqual(roundedPrice);
+    });
+
+    it('Returns price (rounded off) for people aged 22 to 64.', function() {
+        const result = source.purchase(34, price);
+        expect(result).toEqual(price.toFixed(2));
+    });
+});
+
+describe('[4] Find hot categories.', function() {
+    const items = [
+        { id: 'tltry001', name: 'soap', stocks: 14, category: 'toiletries' },
+        { id: 'tltry002', name: 'shampoo', stocks: 8, category: 'toiletries' },
+        { id: 'tltry003', name: 'tissues', stocks: 0, category: 'toiletries' },
+        { id: 'gdgt001', name: 'phone', stocks: 0, category: 'gadgets' },
+        { id: 'gdgt002', name: 'monitor', stocks: 0, category: 'gadgets' }
+    ];
+
+    it('Returns item categories without stocks.', function() {
+        const result = source.findHotCategories(items);
+        expect(result).toEqual(['toiletries', 'gadgets']);
+    });
+});
+
+describe('[5] Find flying voters.', function() {
+    const candidateA = ['LIWf1l', 'V2hjZH', 'rDmZns', 'PvaRBI', 'i7Xw6C', 'NPhm2m'];
+    const candidateB = ['kcUtuu', 'LLeUTl', 'r04Zsl', '84EqYo', 'V2hjZH', 'LIWf1l'];
+
+    it('Returns the array of flying voters.', function() {
+        const result = source.findFlyingVoters(candidateA, candidateB);
+        expect(result).toEqual(['LIWf1l', 'V2hjZH']);
+    });
+});

individual/fullstack/s63

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-Subproject commit a9253e2e4f52925478c882822da78456d1526540