Writing code to execute on yolpo

Style

Typical code which runs on yolpo look like this:

load('lodash.js');

a = _.map([1, 2, 3], function(n) { return n * 3; });

if (a[0] != 3) throw ''
if (a[1] != 6) throw ''
if (a[2] != 6) throw ''
   

This is 100% javascript, so there is nothing new to learn, but just a few things to point out.

• Use the load function to load synchronously an external javascript resource
• Think sequentially and make each statement as simple as possible
• Throw an exception if an expectation is not met

Global variables

Code which runs on yolpo has access to two global variables: load and waitUntil.

• function load(string url) - Loads synchronously an external javascript resource.
  This function throws an exception (timeout) if the script is not loaded within 10 seconds.
• function waitUntil(boolean) - Holds the Process Counter (PC) until the argument becomes true.
  Use this function to work on asynchronous API.