Merge branch 'LaunchCodeEducation:main' into main

Author: tdubey12

classes/chapter-examples/ClassExamples01.js

@@ -0,0 +1,21 @@
+//Try adding new properties inside constructor.
+class Astronaut {
+   constructor(name, age, mass){
+     this.name = name;
+     this.age = age;
+     this.mass = mass;
+   }
+}
+
+let fox = new Astronaut('Fox', 7, 12);
+
+console.log(fox);
+console.log(fox.age, fox.color);
+
+fox.age = 9;
+fox.color = 'red';
+
+console.log(fox);
+console.log(fox.age, fox.color);
+
+//Try modifying or adding properties below.

classes/chapter-examples/ClassExamples02.js

@@ -0,0 +1,17 @@
+// Use terminal commands to see what happens when we call Astronaut but do not pass in 3 arguments.
+
+// Next, set default values for 1 or more of the parameters in constructor.
+
+class Astronaut {
+   constructor(name, age, mass){
+     this.name = name;
+     this.age = age;
+     this.mass = mass;
+   }
+}
+
+let tortoise = new Astronaut('Speedy', 120);
+
+console.log(tortoise.name, tortoise.age, tortoise.mass);
+
+// What happens if we call Astronaut and pass in MORE than 3 arguments? TRY IT!

classes/chapter-examples/ClassMethods.js

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+// Here we assign the method inside the constructor
+class AstronautI {
+   constructor(name, age, mass){
+     this.name = name;
+     this.age = age;
+     this.mass = mass;
+     this.reportStats = function() {
+       let stats = `${this.name} is ${this.age} years old and has a mass of ${this.mass} kg.`;
+         return stats;
+     }
+   }
+ }
+ 
+ // Here we assign the method outside of the constructor
+ class AstronautO {
+   constructor(name, age, mass){
+     this.name = name;
+     this.age = age;
+     this.mass = mass;
+   }
+ 
+   reportStats() {
+     let stats = `${this.name} is ${this.age} years old and has a mass of ${this.mass} kg.`;
+     return stats;
+   }
+ }
+ 
+ let fox = new AstronautI('Fox', 7, 12);
+ let hippo = new AstronautO('Hippo', 25, 1000);
+ 
+ console.log(fox);
+ console.log(hippo);

classes/chapter-examples/Inheritance.js

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+class Felidae {
+	constructor() {
+		this.claws = "retractable";
+	}
+}
+
+class Panthera extends Felidae {
+	constructor() {
+    super();
+		this.roar = "loud";
+	}
+}
+
+class Tiger extends Panthera {
+	constructor() {
+    super();
+		this.hasStripes = "true";
+	}
+}
+
+let tigger = new Tiger();
+
+console.log(tigger);

classes/exercises/ClassExercises.js

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+// Define your Book class here:
+
+
+// Define your Manual and Novel classes here:
+
+
+// Declare the objects for exercises 2 and 3 here:
+
+
+// Code exercises 4 & 5 here:

classes/studio/ClassStudio.js

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+//Declare a class called CrewCandidate with a constructor that takes three parameters—name, mass, and scores. Note that scores will be an array of test results.
+
+
+
+//Add methods for adding scores, averaging scores and determining candidate status as described in the studio activity.
+
+
+
+//Part 4 - Use the methods to boost Glad Gator’s status to Reserve or higher. How many tests will it take to reach Reserve status? How many to reach Accepted? Remember, scores cannot exceed 100%.

exceptions/chapter-examples/finally/finally.js

@@ -0,0 +1,14 @@
+const input = require('readline-sync');
+
+let animals = [{name: 'cat'}, {name: 'dog'}];
+let index = Number(input.question("Enter index of animal:"));
+
+try {
+    console.log('animal at index:', animals[index].name);
+} catch(TypeError) {
+    console.log("We caught a TypeError, but our program continues to run!");
+} finally {
+    console.log("You tried to access an animal at index:", index);
+}
+
+console.log("the code goes on...");

exceptions/chapter-examples/finally/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "control-flow-type-error-finally",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "readline-sync": "^1.4.10"
+  }
+}

exceptions/chapter-examples/throw-default-error.js

@@ -0,0 +1 @@
+throw Error('You cannot divide by zero!');

exceptions/chapter-examples/try-catch/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "control-flow-type-error",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "readline-sync": "^1.4.10"
+  }
+}

exceptions/chapter-examples/try-catch/try-catch.js

@@ -0,0 +1,13 @@
+const input = require('readline-sync');
+
+let animals = [{name: 'cat'}, {name: 'dog'}];
+let index = Number(input.question("Enter index of animal:"));
+
+try {
+    console.log('animal at index:', animals[index].name);
+} catch(TypeError) {
+    console.log("We caught a TypeError, but our program continues to run!");
+    console.log("You tried to access an animal at index:", index);
+}
+
+console.log("the code goes on...");

exceptions/exercises/divide.js

@@ -0,0 +1,7 @@
+// Write a function called 'divide' that takes two parameters: a numerator and a denominator.
+
+// Your function should return the result of numerator / denominator.
+
+// However, if the denominator is zero you should throw the error, "Attempted to divide by zero."
+
+// Code your divide function here:

exceptions/exercises/test-student-labs.js

@@ -0,0 +1,24 @@
+function gradeLabs(labs) {
+  for (let i=0; i < labs.length; i++) {
+    let lab = labs[i];
+    let result = lab.runLab(3);
+    console.log(`${lab.student} code worked: ${result === 27}`);
+  }
+}
+
+let studentLabs = [
+  {
+    student: 'Carly',
+    runLab: function (num) {
+        return Math.pow(num, num);
+    }
+  },
+  {
+    student: 'Erica',
+    runLab: function (num) {
+        return num * num;
+    }
+  }
+];
+
+gradeLabs(studentLabs);

modules/exercises/ScoreCalcs/averages.js

@@ -0,0 +1,19 @@
+function averageForStudent(nameIndex,scores){
+  let sum = 0;
+  for (let i=0; i<scores.length; i++){
+    sum += scores[nameIndex][i];
+  }
+  let average = sum/scores[nameIndex].length;
+  return average;
+}
+
+function averageForTest(testIndex,scores){
+  let sum = 0;
+  for (let i=0; i<scores.length; i++){
+    sum += scores[i][testIndex];
+  }
+  let average = sum/scores[0].length;
+  return average;
+}
+
+//TODO: Export all functions within an object.

modules/exercises/display.js

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+//TODO: Export ONLY the printAll function.
+
+function printAll(names, tests, scores){
+  let header = 'Name';
+  let row = '';
+
+  for (let i = 0; i<tests.length; i++){
+    header += '\t'+tests[i];
+  }
+  console.log(header);
+
+  for (let name = 0; name<names.length; name++){
+    row = names[name];
+    for (let score = 0; score<scores[name].length;score++){
+      row += '\t'+scores[name][score];
+    }
+    console.log(row);
+  }
+  return;
+}
+
+function printStudentScores(index,students,tests,scores){
+  console.log(`Test results for ${students[index]}:`);
+  for (let i = 0; i<tests.length; i++){
+    console.log(`${tests[i]} = ${scores[index][i]}%.`);
+  }
+  return;
+}
+
+function printTestScores(index,test,students,scores){
+  console.log(`Class results for ${test} test:`);
+  for (let i = 0; i<students.length; i++){
+    console.log(`${students[i]} = ${scores[i][index]}%.`);
+  }
+  return;
+}

modules/exercises/index.js

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+//Import modules:
+const input = //Import readline-sync.
+const averages = //Import functions from averages.js.
+const printAll = //Import function from display.js.
+const randomSelect = //Import function from randomSelect.js.
+
+//Candidate data:
+let astronauts = ['Fox','Turtle','Cat','Hippo','Dog'];
+
+const testTitles = ['Math','Fitness','Coding','Nav','Communication'];
+
+let scores = [[95, 86, 83, 81, 76],[79, 71, 79, 87, 72],[94, 87, 87, 83, 82],[99, 77, 91, 79, 80],[96, 95, 99, 82, 70]];
+
+//User interface:
+let prompts = ['display all scores', 'average the scores for each test', 'average the scores for each astronaut','select the next spacewalker'];
+
+for (let i = 0; i<prompts.length; i++){
+  let response = input.question(`Would you like to ${prompts[i]}? Y/N: `);
+  if (response.toLowerCase()==='y'){
+    if (i===0){
+      //Call 'printAll' here and pass in all necessary arguments.
+    } else if (i===1){
+      for (let j = 0; j<testTitles.length; j++){
+        let avg = //Call 'averageForTest' here. Pass in j and scores as arguments.
+        console.log(`${testTitles[j]} test average = ${avg}%.`);
+      }
+    } else if (i===2){
+      for (let j = 0; j<astronauts.length; j++){
+        let avg = //Call 'averageForStudent' here. Pass in j and scores as arguments.
+        console.log(`${astronauts[j]}'s test average = ${avg}%.`);
+      }
+    } else {
+      let walker = //Call 'randomSelect' to pick a spacewalker from the astronauts array.
+      console.log(`${walker} is the next spacewalker.`);
+    }
+  } else {
+    console.log("Option skipped.");
+  }
+}

modules/exercises/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "Dependencies for Chapter 13 Exercises: Modules",
+  "version": "1.0.0",
+  "description": "This package.json file includes all dependencies needed to run code within files contained in this directory",
+  "main": "index.js",
+  "dependencies": {
+    "readline-sync": "^1.4.10"
+  },
+  "scripts": {
+    "start": "node index.js"
+  },
+  "author": "John Woolbright",
+  "license": "ISC"
+}

modules/exercises/randomSelect.js

@@ -0,0 +1,5 @@
+function randomFromArray(arr){
+  //Your code here to select a random element from the array passed to the function.
+}
+
+//TODO: Export the randomFromArray function.

modules/exporting-modules/index.js

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+// Import the modules exported from practiceExports.js below:

modules/exporting-modules/practiceExports.js

@@ -0,0 +1,16 @@
+function isPalindrome(str){
+    return str === str.split('').reverse().join('');
+}
+
+function evenOrOdd(num){
+    if (num%2===0){
+        return "Even";
+    } else {
+        return "Odd";
+    }
+}
+
+function randomArrayElement(arr){
+    let index = Math.floor(Math.random()*arr.length);
+    return arr[index];
+}

more-on-functions/chapter-examples/anonymous-functions/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "Chapter 11: More on Functions Chapter Examples Directory",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "readline-sync": "^1.4.10"
+  }
+}

more-on-functions/chapter-examples/anonymous-functions/refactor-to-anonymous.js

@@ -0,0 +1,7 @@
+function reverse(str) {
+  let lettersArray = str.split('');
+  let reversedLettersArray = lettersArray.reverse();
+  return reversedLettersArray.join('');
+}
+
+console.log(reverse("LaunchCode"));

more-on-functions/chapter-examples/anonymous-functions/userInput-is-negative.js

@@ -0,0 +1,10 @@
+const input = require('readline-sync');
+let userInput = input.question("Please enter a number:");
+let logger = function(errorMsg) {
+  console.log("ERROR: " + errorMsg);
+};
+if (userInput < 0) {
+  // ______("Invalid input");
+}
+
+// Fill in the blank in line 7 (then uncomment it) so that it logs an error message if userInput is negative.