Modules exercises

Author: ChronicleGremlin

modules/exercises/ScoreCalcs/averages.js

@@ -17,3 +17,7 @@ function averageForTest(testIndex,scores){
 }
 
 //TODO: Export all functions within an object.
+module.exports = {
+  averageForStudent: averageForStudent,
+  averageForTest: averageForTest
+};

modules/exercises/display.js

@@ -34,3 +34,7 @@ function printTestScores(index,test,students,scores){
   }
   return;
 }
+
+module.exports = {
+  printAll: printAll
+};

modules/exercises/index.js

@@ -1,36 +1,37 @@
 //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.
+const input = require('readline-sync'); //Import readline-sync.
+const averages = require('../exercises/ScoreCalcs/averages.js'); //Import functions from averages.js.
+const printAll = require('./display.js'); //Import function from display.js.
+const randomSelect = require('./randomSelect.js'); //Import function from randomSelect.js.
 
 //Candidate data:
-let astronauts = ['Fox','Turtle','Cat','Hippo','Dog'];
+let astronauts = ['Fox', 'Turtle', 'Cat', 'Hippo', 'Dog'];
 
-const testTitles = ['Math','Fitness','Coding','Nav','Communication'];
+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]];
+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'];
+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++){
+for (let i = 0; i < prompts.length; i++) {
   let response = input.question(`Would you like to ${prompts[i]}? Y/N: `);
-  if (response.toLowerCase()==='y'){
-    if (i===0){
+  if (response.toLowerCase() === 'y') {
+    if (i === 0) {
       //Call 'printAll' here and pass in all necessary arguments.
-    } else if (i===1){
-      for (let j = 0; j<testTitles.length; j++){
-        let avg = //Call 'averageForTest' here. Pass in j and scores as arguments.
+      printAll.printAll(astronauts, testTitles, scores);
+    } else if (i === 1) {
+      for (let j = 0; j < testTitles.length; j++) {
+        let avg = averages.averageForTest(j, scores); //Call 'averageForTest' here. Pass in j and scores as arguments.
         console.log(`${testTitles[j]} test average = ${avg}%.`);
       }
-    } else if (i===2){
-      for (let j = 0; j<astronauts.length; j++){
-        let avg = //Call 'averageForStudent' here. Pass in j and scores as arguments.
+    } else if (i === 2) {
+      for (let j = 0; j < astronauts.length; j++) {
+        let avg = averages.averageForStudent(j, scores); //Call 'averageForStudent' here. Pass in j and scores as arguments.
         console.log(`${astronauts[j]}'s test average = ${avg}%.`);
       }
     } else {
-      let walker = //Call 'randomSelect' to pick a spacewalker from the astronauts array.
+      let walker = randomSelect.randomFromArray(astronauts); //Call 'randomSelect' to pick a spacewalker from the astronauts array.
       console.log(`${walker} is the next spacewalker.`);
     }
   } else {

modules/exercises/randomSelect.js

@@ -1,5 +1,9 @@
 function randomFromArray(arr){
-  //Your code here to select a random element from the array passed to the function.
+   let index = Math.floor(Math.random()*arr.length);
+   return arr[index];
 }
 
 //TODO: Export the randomFromArray function.
+module.exports = {
+  randomFromArray: randomFromArray
+};