Benjamin Herzog

Parsing is a very common task, it does not always mean to parse source code or JSON strings. Parsing means to transform an unstructured input to a structured output. In case of source code this means to parse a raw string to an AST (abstract syntax tree), in case of an addition it means to parse the result of adding two numbers out of a string. Parsing can always fail, if the input does not match the needed grammer. If the input string in the above example would have been 1+, it would have been failed because the second number is missing. The advantage of parser combinators is that you start with a very basic parser. In the above example digit parses only one digit. But it is not hard, to add a parser that parses more than one digit. A number is a repetition of mulitple digits. For repetition, we can use rep, which tries to apply the parser until it fails and collects the result as an array.

License: MIT

If you want to create a rich video presentation of you app, you need some kind of visualization for the touches since they are not visible in screen recordings. This library offers the possibility to highlight every touch on the screen. You are also able to create own custom indicators.

License: MIT