Using a WHILE loop | UBIO Robot School

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There are cases when it's impossible to predict the number of loops needed to put the page into the intended state. In this lesson, you'll learn to use the "while" loop action – the one that works while it needs to.

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The "while" action loops over its children actions while the condition is true. The pipeline should result in a tuple of a single element and a boolean value. If the value is true, the control is passed to the children.

Note that there is a limit: a maximum number of iterations. It's there to prevent an endless loop. Default is 10, but feel free to change it if you expect more.

The challenge ahead is to script a calendar. Here are the pipes you need to know:

Value.equals is similar to the Value.contains pipe which you should be familiar with from the IF and ELSE Conditions. The difference is that the "equals" pipe checks if values are precisely similar, while the "contains" one is happy with the partial match.
Date.format is handy when it comes to scripting dates. It parses the value using a specified input format and returns the value formatted in an output format. See moment.js docs for more information about its formatting patterns.