From: David Fayram <kirindave@...>
Date: 2003-07-27T07:18:46+09:00
Subject: Re: Set doesn't have [] instance method


On Saturday, July 26, 2003, at 3:08 PM, Josef 'Jupp' Schugt wrote:

> Saluton!
>
> * Gavin Sinclair; 2003-07-26, 20:13 UTC:
>> It should, shouldn't it?  It's meant to combine the fast lookup of
>> Hash with the convenience of Array, yet the most important method Hash
>> and Array have in common, Set lacks!
>>
>> $ irb
>> irb(main):001:0> require 'set'
>> => true
>> irb(main):002:0> s = Set[1,2,3]
>> => #<Set: {1, 2, 3}>
>> irb(main):003:0> s.include? 1
>> => true
>> irb(main):004:0> s[1]
>> NoMethodError: undefined method `[]' for #<Set: {1, 2, 3}>
>>         from (irb):4
>>         from :0
>
> Ruby follows the principle of least surprise. Am I the only one to be
> stupefied if '[]' would exist for a set?

Definitely not. When I first saw it, it took me a second to even 
realize what the heck it
should do.

- Dave "paradox" Fayram
Developer / Idealist