## ParsingFunction


One item of a `_fns` pipeline, whose `_fn` names one of the 20 documented functions.


`ParsingFunction=(`\
`    _NoArgs`\
`    | _Expressions`\
`    | _CssOne`\
`    | _Join`\
`    | _RegexFindAll`\
`    | _RegexSearch`\
`    | _RegexSubstring`\
`    | _SelectNth`\
`    | _Average`\
`)`


[List of parsing functions](https://developers.oxylabs.io/products/web-scraper-api/features/custom-parser/writing-instructions-manually/list-of-functions) gives each function's `_args`.