From: Blake Miller <blakeage@...>
Date: 2006-12-02T04:19:47+09:00
Subject: Re: Simple iteration in a function problem

Mike Fletcher wrote:
> Blake Miller wrote:
>> # this is the problem function.  all I want is the specific (ONE)
>> element
>> # from the @ys array that matches the id, but when you iterate over the
>> # array, i can't find a way to only have one element returned
>> def getXById(id)
>>  @ys.each_with_index do |comp, index|
>>    if( @ys[index].getUniqueId == id )
>>      @ys.fetch(index)
>>    end
>>  end
>> end
> 
> Perhaps
> 
> def getXById( id )
>   @ys.detect { |y| y.getUniqueId == id }
> end
> 
> See the docs for Enumerable#detect about handling what's returned if 
> nothing is found.

I don't know where "detect" comes from (@ys is an array, and it doesn't 
seem to be a method of Array)? however, I tried that and the result is 
null, but I know for certain that the id being searched for does match 
an element in the @ys array (because I wrote a function to print out the 
ids in @ys)

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