Fun with Promises

How to run the exercises

Add a breakpoint in the main function in the exercise you want to check.

Go to debug option and select the exercise in the select list

Click on the play button and enjoy

Exercise 00

Create function f3. This function must to:

• call f1 with 4
• call f2, with the result of f1
• return f1 + f2

Call f3 function into main function.

Exercise 01

Create function f3. This function must to:

• call f1 with 5
• call f2 with 2
• return f1 + f2

Call f3 function into main function.

Exercise 02

Create function f3. This function must to:

• call f1 with 4
• call f2 with the result of f1
• return the value of f2

Call f3 function into main function.

Exercise 03

Part 1

Create function f3. This function will receive an array of numbers.

For each number:

• call f1 with the number
• return the result of f1

Then, sum all the results of f1 and return it

Tips:

• the final sum is 36
• MDN Array

Part 2 (bonus)

Create function f3. This function will receive an array of numbers.

For each number:

• call f1 with the number
• call f2 with the result of f1
• return the result of f2

Then, sum all the results of f2 and return it

Tip:

• the final sum is 72

Bonus track: error

Execute the error.js example to see what is happening...