From: 7stud -- <bbxx789_05ss@...>
Date: 2009-02-07T02:33:42+09:00
Subject: Re: Dynamically create an unknown number of arrays

7stud -- wrote:
> Shandy Nantz wrote:
>> I need to create an unknow number of arrays on the fly (could be 1 array
>> could be 10, I don't know), is there a way to do this in Ruby and also
>> name them dynamically? I also need to set those array's to a collection
>> of stuff found in a table. My Ruby is pretty rusty, and I am not sure if
>> I can simply set an array to a group of stuff. If I have rows in a table
>> that can be accessed by saying @user.table_name, can I say:
>> 
>> a = Array.new
>> a = @user.table_name
>> 
>> Thanks for any help,
>> 
>> -S
> 
> --data.txt--
> apple, banana, strawberry
> 10, 20, 30, 40
> red blue green yellow black
> 100 200 300
> a b c d
> -----------
> 
> data = []
> num_arrays = rand(5)
> 
> File.open("data.txt") do |f|
>   num_arrays.times do
>     line = f.gets.strip()
>     data << line.split("/,?\s*/")
>   end
> end
> 
> p data
> 
> --output:--
> [["apple, banana, strawberry"], ["10, 20, 30, 40"], ["red blue green 
> yellow black"]]
> 
> The names of the arrays are: data[0], data[1], data[2]

Whoops.  No quotes around regex's in ruby, and that regex doesn't work 
anyway.

If you have comma delimited data like this:

--data.txt-----------
apple, banana, strawberry
10, 20, 30, 40
red, blue, green, yellow, black
100, 200, 300
a, b, c, d
---------------------

you can use this for the regex:

pieces = line.split(/,\s*/)

If your data is space delimited, you can use:

pieces = line.split(/\s+/)


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