Re: ruby rookie needs help with "ri" command

You have the option at install time to install the documentation (what ri reads from) or not. If your particular Ruby was installed with --no-ri --no-rdoc then there is nothing for it to read from. Personally, I use a desktop documentation reader called Dash (Mac only), and I am sure there are similar utilities available for Windows. There's also the full documentation available at https://ruby-lang.org 

And I just found this, which may as well have been written by you ;-)

https://stackoverflow.com/questions/3178900/how-do-i-install-the-ruby-ri-documentation

Walter

> On Jun 23, 2019, at 5:07 PM, Barry Kimelman <[email protected]> wrote:
> 
> I am a ruby rookie with a question
> 
> I am running ruby 2.6.0p0 (2018-12-25 revision 66547) [x64-mingw32]
> my laptop is windows 10
> 
> I was going through the PDF versionb of a ruby intro book and I have a question about the "ri" command. The PDF file shows the following examples
> 
> ri Array
> ri Array.sort
> ri Hash#each
> ri Math::sqrt
> 
> But in each case I receive an error message of the form "Nothing known about xxx". Why is there no available info on these topics ?
> 
> ==================
> 
> Barry Kimelman
> 
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