Objects and Math exercises and examples

Author: Lbeckap

objects-and-math/chapter-examples/ForInLoop.js

@@ -6,4 +6,18 @@ let tortoiseOne = {
    diet: ["pumpkins", "lettuce", "cabbage"]
 };
 
-// Using a for..in loop, iterate through each property in the tortoiseOne object and print the value to the console.
+// Using a for..in loop, iterate through each property in the tortoiseOne object and print the value to the console.
+
+for (item in tortoiseOne) {
+   console.log(`${item}, ${tortoiseOne[item
+   ]}`);
+
+}
+
+console.log("-".repeat(40));
+//Lets try adding to it
+for (item in tortoiseOne) {
+   console.log(`${item}, ${tortoiseOne[item] + ' This was added :-)'}`); 
+
+}
+

objects-and-math/chapter-examples/KindnessSelection.js

@@ -13,5 +13,23 @@ function randomSelection(arr){
 
  //Experiment with the code above. Try to:
  //a) Print 3 random selections from each array.
+ for (let i = 0; i < 3; i++) {
+  console.log(`happiness: ${randomSelection(happiness)}`);
+  console.log(`words: ${randomSelection(words)}`);
+ }
  //b) Have the code randomly pick one array, and then print 2 random items from it.
+ 
+  let zeroOrOne = Math.floor(Math.random() * 2);
+  console.log(`zeroOrOne: ${zeroOrOne}`);
+  if (zeroOrOne === 0) {
+    console.log(`Random array happiness`);
+    console.log(`happiness: ${randomSelection(happiness)}`);
+    console.log(`happiness: ${randomSelection(happiness)}`);
+    
+  } else {
+    console.log(`Random array words`);
+    console.log(`words: ${randomSelection(words)}`);
+    console.log(`words: ${randomSelection(words)}`);
+  }
+ 
  //c) Create a new array, then fill it with one random item from words and happiness. Print the new array.

objects-and-math/exercises/ObjectExercises.js

@@ -12,13 +12,79 @@ let salamander = {
    age: 5
 };
 
+let superChimpTwo = {
+   name: "Brad",
+   species: "Chimpanzee",
+   mass: 11,
+   age: 6
+};
+
+let beagle = {
+   name: "Leroy",
+   species: "Beagle",
+   mass: 14,
+   age: 5
+};
+
+let tardigrade = {
+   name: "Almina",
+   species: "Tardigrade",
+   mass: 0.0000000001,
+   age: 1
+};
+
+let crew = [superChimpOne, salamander,superChimpTwo, beagle, tardigrade];
 
 // After you have created the other object literals, add the astronautID property to each one.
+let checkForSameId = [];
+function addAstronautID (animals) {
+   animals.astronautID = Math.ceil(Math.random() * 10);
+
+   while (checkForSameId.includes(animals.astronautID)){
+      animals.astronautID = Math.ceil(Math.random() * 10);
+   }
+   checkForSameId.push(animals.astronautID);
+ 
+   return animals;
+}
 
 // Add a move method to each animal object
+function addMoveMethod(animal) {
+   animal.move = function () {
+      let steps = Math.floor(Math.random() * 11);
+      return steps;
+   }
+  return animal;
+}
 
-// Create an array to hold the animal objects.
+for (let i = 0 ; i < crew.length; i++) {
+   addAstronautID(crew[i]);
+   addMoveMethod(crew[i]);
+}
+console.log(crew);
 
 // Print out the relevant information about each animal.
+function crewReports (animal) {
+   return `${animal.name} is a ${animal.species}. They are ${animal.age} years old and ${animal.mass} kilograms. Their ID is ${animal.astronautID}.`;
+}
+
+console.log(crewReports(tardigrade));
 
 // Start an animal race!
+function fitnessTest(arr) {
+   let result = [];
+   for (let i = 0; i < arr.length; i++){
+      let turns = 0;
+      let steps = 0;
+      while (steps < 21) {
+         steps += arr[i].move();
+         turns++;
+      }
+      result.push(`${arr[i].name} took ${turns} turns to take 20 steps.`);
+   }
+   return result;
+}
+
+fitnessTest(crew).forEach(element => {
+   console.log(element);
+});