Allow to hide row numbers

[rominf]

Sometimes I don't need row numbers because I have my own numeration (see UPD in #591) as one of the columns, in this case row numbering only clutters.

[garborg]

This certainly seems reasonable to me. It may be a while before any of the regular developers get to it as there's quite a backlog of bugs, performance bottlenecks, and missing features. On the other hand, it's up for grabs 😉

[nalimilan]

I would make sense to hide the row numbers if a column is defined as the primary key (when this feature will be supported). Maybe you should also be allowed to set the primary key to a special value, like nothing, to specify that you don't care about row numbers?

[johnmyleswhite]

This seems totally reasonable: I think the main difficulty is picking an interface for it.

[StefanKarpinski]

Having a notion of primary keys for data frames could be really powerful. It would have to support multi-column primary keys though.

[johnmyleswhite]

I think we all agree that we'd like to have primary keys for DataFrames. The main questions are (a) who's going to do it and (b) should we do it before we finish cleaning up our existing core functionality. I'm so swamped these days that it's very unlikely I can work on it for several months to come.

[rominf]

Wow, cool I wanted to suggest primary keys for DataFrames too but was afraid that nobody will support my idea 😄

[StefanKarpinski]

I'd say let it be for now – stabilizing DataFrames is more important than adding functionality. Once the existing stuff is rock solid, adding new functionality will be ok.

[nalimilan]

Yeah, definitely not an high-priority requirement IMHO.

[jayvn]

Any progress on this one ?

[bkamins]

@ronisbr - is this configurable in PrettyTables.jl? (i.e. can we disable printing row?)

[ronisbr]

Yes! Just pass the option show_row_number = false.