From: dblack@...
Date: 2007-09-16T21:16:39+09:00
Subject: Re: NoMethodError: undefined method `scanf' for main:Object

Hi --

On Sun, 16 Sep 2007, Alex Shulgin wrote:

> Hi,
>
> I'm trying to use scanf(), but no luck:
>
> $ ruby --version
> ruby 1.8.6 (2007-06-07 patchlevel 36) [i486-linux]
> $ uname -a
> Linux zrbite 2.6.21-2-686 #1 SMP Wed Jul 11 03:53:02 UTC 2007 i686 GNU/
> Linux
> $ irb
> irb(main):001:0> w=scanf("%s")
> NoMethodError: undefined method `scanf' for main:Object
>        from (irb):1
> irb(main):002:0>
>
> Trying to call $stdin.scanf() does not help either (NoMethodError).
> What I'm missing?

You have to require it:

irb(main):001:0> require 'scanf'
=> true
irb(main):002:0> a = scanf("%s")
abc
=> ["abc"]
irb(main):003:0> a
=> ["abc"]


David

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