Exercise Solutions: Modules¶

Export Finished Modules¶

1. In averages.js, add code to export all of the functions within an object.

   1module.exports = {
   2   averageForStudent: averageForStudent,
   3   averageForTest: averageForTest
   4};
   

Code and Export a New Module¶

1. Add code to complete the randomFromArray function. It should take an array as an argument and then return a randomly selected element from that array.

   1function randomFromArray(arr){
   2   let index = Math.floor(Math.random()*arr.length);
   3   return arr[index];
   4}
   

Import Required Modules¶

1. Assign readline-sync to the input variable.

   const input = require('readline-sync');
   

3. Assign the printAll function from display.js to the printAll variable.

   const printAll = require('./display.js');
   

Finish the Project¶

1. Line 21 - Call printAll to display all of the tests and student scores. Be sure to pass in the correct arguments.

   21printAll(astronauts, testTitles, scores);
   

3. Line 29 - Call averageForStudent (with the proper arguments) to print each astronaut's average score.

   29let avg = averages.averageForStudent(j, scores);