From: "Bilyk, Alex" <ABilyk@...>
Date: 2008-10-08T10:32:26+09:00
Subject: Re: Looking for more Ruby-like way to create an array

converted_array = original_array.inject([]) {|a, line| a << (line.to_f * 100)}

-----Original Message-----
From: David A. Black [mailto:dblack@rubypal.com]
Sent: Tuesday, October 07, 2008 6:19 PM
To: ruby-talk ML
Subject: Re: Looking for more Ruby-like way to create an array

Hi --

On Wed, 8 Oct 2008, William James wrote:

> On Oct 7, 4:33 pm, Steve Nicholson <sst...@mac.com> wrote:
>> I'm creating an array that is the result of the members of another
>> array each multiplied by 100. Here's what I have:
>>
>>   converted_array = []
>>   original_array.each {|line| converted_array << line.to_f * 100}
>>
>> This works, but I'm wondering if there is a more idiomatically "Ruby"
>> way of doing it.
>> --
>> Posted viahttp://www.ruby-forum.com/.
>
> irb(main):001:0> a = 2,3,5,8
> => [2, 3, 5, 8]
> irb(main):002:0> a.map!{|n| n*10 }
> => [20, 30, 50, 80]
> irb(main):003:0> a
> => [20, 30, 50, 80]

That's a little different, since it leaves you without the original array (which may in fact be OK, but is an important difference).


David

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