Print help about the `xan` expression language.
`xan help cheatsheet` will print a short cheatsheet about
how the language works. It can also be found online here:
https://github.com/medialab/xan/blob/master/docs/moonblade/cheatsheet.md
`xan help functions` will print the reference of all of the language's
functions (used in `xan select -e`, `xan map`, `xan filter`, `xan transform`,
`xan flatmap` etc.). It can also be found online here:
https://github.com/medialab/xan/blob/master/docs/moonblade/functions.md
`xan help aggs` will print the reference of all of the language's
aggregation functions (as used in `xan agg` and `xan groupby` mostly).
It can also be found online here:
https://github.com/medialab/xan/blob/master/docs/moonblade/aggs.md
`xan help scraping` will print information about the DSL used
by `xan scrape` and the related functions. It can also be found online here:
https://github.com/medialab/xan/blob/master/docs/moonblade/scraping.md
Use the -p/--pager flag to open desired documentation in a suitable
pager.
Use the -O/--open to read the desired documentation online (might
be slightly out of date!).
Usage:
xan help cheatsheet [options]
xan help functions [options]
xan help aggs [options]
xan help scraping [options]
xan help --help
help options:
-O, --open Open the desired docs in a web browser.
-p, --pager Pipe the help into a pager (Same as piping
with forced colors into `less -SRi`).
-S, --section <query> Filter the `functions` doc to only include
sections matching the given case-insensitive
query.
--json Dump the help as JSON data.
--md Dump the help as Markdown.
Common options:
-h, --help Display this message