Added S64

individual/fullstack/s64/.gitignore

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+/node_modules

individual/fullstack/s64/.gitlab-ci.yml

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

individual/fullstack/s64/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/s54-solution)

individual/fullstack/s64/package.json

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+{
+  "name": "s54",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "jest"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "jest": "^26.6.3"
+  }
+}

individual/fullstack/s64/queue.js

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+let collection = [];
+
+// Write the queue functions below.
+function print() {
+    return collection;
+}
+
+function enqueue(value) {
+    collection.push(value);
+    return collection;
+}
+
+function dequeue() {
+    collection.shift();
+    return collection;
+}
+
+function front() {
+    if (collection.length === 0) {
+        return undefined;
+    }
+    return collection[0];
+}
+
+function size() {
+    return collection.length;
+}
+
+function isEmpty() {
+    return collection.length === 0;
+}
+
+module.exports = {
+    print,
+    enqueue,
+    dequeue,
+    front,
+    size,
+    isEmpty
+};

individual/fullstack/s64/stack.html

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+<script>
+    let collection = [];
+
+    function addToStack(element) {
+        collection.push(element);
+        return collection;
+    }
+
+    function removeFromStack() {
+        collection.pop();
+        return collection;
+    }
+
+    function peek() {
+        return collection[collection.length-1];
+    }
+
+    function getLength() {
+        return collection.length;
+    }
+</script>

individual/fullstack/s64/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 queue = require('./queue');
+
+describe('[1] Print queue elements.', function() {
+    it('The printed value is an empty array. RESULT = []', function() {
+        expect(queue.print()).toEqual([]);
+    });
+});
+
+describe('[2] Enqueue a new element.', function() {
+    it('The value has been enqueued. RESULT = [\'John\']', function() {
+        expect(queue.enqueue('John')).toEqual(['John']);
+    });
+});
+
+describe('[3] Enqueue another element.', function() {
+    it('The value has been enqueued. RESULT = [\'John\', \'Jane\']', function() {
+        expect(queue.enqueue('Jane')).toEqual(['John', 'Jane']);
+    });
+});
+
+describe('[4] Dequeue the first element.', function() {
+    it('The value has been dequeued. RESULT = [\'Jane\']', function() {
+        expect(queue.dequeue()).toEqual(['Jane']);
+    });
+});
+
+describe('[5] Enqueue another element.', function() {
+    it('The value has been enqueued. RESULT = [\'Jane\', \'Bob\']', function() {
+        expect(queue.enqueue('Bob')).toEqual(['Jane', 'Bob']);
+    });
+});
+
+describe('[6] Enqueue another element.', function() {
+    it('The value has been enqueued. RESULT = [\'Jane\', \'Bob\', \'Cherry\']', function() {
+        expect(queue.enqueue('Cherry')).toEqual(['Jane', 'Bob', 'Cherry']);
+    });
+});
+
+describe('[7] Get first element.', function() {
+    it('The first value has been retrieved. RESULT = \'Jane\'', function() {
+        expect(queue.front()).toEqual('Jane');
+    });
+});
+
+describe('[8] Get queue size.', function() {
+    it('The size of the queue has been retrieved. RESULT = 3', function() {
+        expect(queue.size()).toEqual(3);
+    });
+});
+
+describe('[8] Check if queue is not empty.', function() {
+    it('The result has been retrieved. RESULT = false', function() {
+        expect(queue.isEmpty()).toEqual(false);
+    });
+});