From: Florian Gilcher <flo@...>
Date: 2012-05-07T23:26:21+09:00
Subject: Re: Why Enumerator#next does not return more than one value?


On May 7, 2012, at 3:10 PM, Földes László wrote:

> If I have an Enumerator which yields elements of a mathematical series
> (logistic map), I can use:
> 
> enum.first(10) to get the first 10 value,
> enum.next to get the next values,
> 
> but there is no enum.next(10) to get the next 10 values.
> I do some trickery like this to achieve the same result (because I need
> the result in an Array, as #first returns it):
> (0..20).map {(lm.next)}
> 
> Is there a nicer way to do it? (Or did I overlook some existing method
> in Enumerable?)
> 
> At first I thought it is logical that #next should have a parameter so
> the #first(10) method could be actually a #rewind + #next(10).

This is what #take does:

http://www.ruby-doc.org/core-1.9.3/Enumerator.html

has an example in the docs of #new.