From: "baptiste Auguié" <ba208@...>
Date: 2007-06-30T02:47:07+09:00
Subject: Re: newbie questions on processing numerical data from text files

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On 29 Jun 2007, at 14:32, Axel Etzold wrote:

> Dear Baptiste,
>
> welcome to Ruby!

Thanks a lot!

I have a few problems though,

>
>> locate a line according to some keyword
>
>
> interesting_text.delete_if{|line|  /(r|R)uby/.match==nil}
>
> removes all lines that don't contain the string Ruby or ruby,

for some reason this doesn't work for me. I get an error message:
ArgumentError: wrong number of arguments (0 for 1)


if i replace this argument with something based on line numbers  
rather than regexp, it's fine. Is the Regexp wrong?


>
>> and change a value
> old_value=1.2
> new_value=2.4
>
> interesting_text.sub!(old_value.to_s,new_value.to_s)
>

I can't get that to work either :
NoMethodError: private method `sub!' called for #<Array:0x7d180>



>
>
> Best regards,
>
> Axel


The rest works fine, thanks again!

baptiste



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