From: Michel Demazure <lists@...>
Date: 2012-06-27T01:10:42+09:00
Subject: Re: Symbols and Strings.

Ryan Davis wrote in post #1066026:
> On Jun 25, 2012, at 08:14 , Michel Demazure wrote:
>
>> In Sequel, you have to write something like '.order(:name.desc)' to ask
>> for a reverse ordering of a field. How, given the symbol :name, do you
>> build the symbol :name.desc, without some sort of 'eval' ?
>
> You've already gotten a good answer (Symbol#desc) but I wanted to add
> some clarification on how your example above is seen by ruby:
>
> 3431 % pwd
> /Users/ryan/Work/p4/zss/src/ruby_parser/dev/
> 3432 % rake debug R="a.order(:name.desc)"
> s(:call, s(:call, nil, :a), :order, s(:call, s(:lit, :name), :desc))
>                                     -------------------------------

Thanks, Ryan and Bartosz, for your help !
_md

-- 
Posted via http://www.ruby-forum.com/.