Stubble | Trimmed down { { mustache } } templates in .NET

I figured out that the libraries need to recieve a json object not a string (that happens to be json) as the Data.

The Keep method takes a function as a parameter. It expects it to be func (int) bool - a function taking an int and returning a bool.

When Keep is invoked in Discard, the code passes it an anonymous function with the right signature (take int, return bool). This anonymous function invokes strainer (which is a function passed into Discard) and returns its response, negated.

The idea is that strainer is a filter function: it tells you which elements to keep. So the implementation of Keep is straightforward: iterate over all elements, and keep only those for which strainer returns true.

Discard is written in a clever way using Keep, instead of also writing a loop like this:

The calendar time value is not an attribute but is stored as the node's element and is accessed directly.

Also note that if an Event Node is missing a "dateEV" then there will be problems aligning the "labs" with the "time". It is better to extract the time value from each parent node instead of the entire document.