Nested for Loops

Nested for Loops in an exercise to help with building two dimensional data structures using for loops. Using iteration to build strings, arrays or objects is a common practice as a software developer.

Setup

The exercise will use the browser as your runtime and for testing. You will need to serve the index.html file to run the tests. One way to do this it to use live-server.

Install live-server

$ npm install -g live-server

To serve the project you will run live-server from the root of the project.

$ live-server

This will launch your browser to http://127.0.0.1:8080

Requirements

Here you are asked to finish out the function nestedForLoops() found in js/nested-for-loops.js. This function can take either one or two numeric parameters. With those parameters you will generate a string output.

Examples

invocation	output
nestedForLoops(2)	{x:0, y:0}, {x:1, y:0} {x:0, y:1}, {x:1, y:1}
nestedForLoops(4, 2)	{x:0, y:0}, {x:1, y:0} {x:0, y:1}, {x:1, y:1} {x:0, y:2}, {x:1, y:2} {x:0, y:3}, {x:1, y:3}
nestedForLoops()	""
nestedForLoops("foo")	""

Testing

There are predetermined test you will need to make pass.

1. invoke with a single parameter.
2. invoke with the first param greater than the second.
3. invoke with the first param less than the second.
4. invoke with no params.
5. invoke with a non-numeric param.

Debugging

To manually invoke nestedForLoops open the browsers console. nestedForLoops is available on the global scope and can be invoked directly.

Console: ⌥⌘J (Mac) or Ctrl + Shift + J (Windows/Linux)

> nestedForLoops(6, 3)
"
{x:0, y:0}, {x:1, y:0}, {x:2, y:0}
{x:0, y:1}, {x:1, y:1}, {x:2, y:1}
{x:0, y:2}, {x:1, y:2}, {x:2, y:2}
{x:0, y:3}, {x:1, y:3}, {x:2, y:3}
{x:0, y:4}, {x:1, y:4}, {x:2, y:4}
{x:0, y:5}, {x:1, y:5}, {x:2, y:5}
"