From: Josh Cheek <josh.cheek@...>
Date: 2012-02-11T22:05:13+09:00
Subject: Re: Return First Value that Passes

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On Fri, Feb 10, 2012 at 9:25 PM, Jonah Jameson <justindallas@gmail.com>wrote:

> Hello Everyone,
>  I am new to Ruby, but I like how many of the functions one would use
> in programming are baked right in.  Here is my problem, I have an array
> with objects that is ordered by a particular attribute, lets call it
> "age".
>
> What I seek to do is to iterate through the array, and return the object
> that passes a certain test function.  Lets say the first object with an
> age greater than 35.  Is there a function that will already do this, or
> do I have to roll my own ?
>
> Any help is greatly appreciated.
>
> --
> Posted via http://www.ruby-forum.com/.
>
>
You look these kinds of methods up in the Enumerable class
http://rubydoc.info/stdlib/core/1.9.3/Enumerable In your case, find/detect


User = Struct.new :name, :age
users = [
  User.new("Phil", 33),
  User.new("Sandy", 25),
  User.new("Carl", 43),
  User.new("Jim", 19)
]

users.find { |user| user.age > 35 } # => #<struct User name="Carl", age=43>

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