[#407882] Ruby extremely slow compared to PHP — Mick Jagger <lists@...>

Hello there, how are you? Hope you are fine. I am a PHP programmer

17 messages 2013/06/02

[#407908] TCPServer/Socket and Marshal problem — Panagiotis Atmatzidis <atma@...>

Hello,

18 messages 2013/06/03

[#407946] Is rubyquiz.com dead? — Alphonse 23 <lists@...>

Thread title says everything.

18 messages 2013/06/04

[#408012] Need help understanding recursion. — pedro oliva <lists@...>

Ive been reading Chris Pine's book 'Learn to Program' and its been going

11 messages 2013/06/06

[#408129] Getting Started With Development — Chamila Wijayarathna <cdwijayarathna@...>

I'm new to Ruby Development. I downloaded source from Github, but couldn't

24 messages 2013/06/11
[#408131] Re: Getting Started With Development — Per-erik Martin <lists@...> 2013/06/11

Ruby is often installed on linux, or can be easily installed with the

[#408146] Re: Getting Started With Development — "Chamila W." <lists@...> 2013/06/11

Per-erik Martin wrote in post #1112021:

[#408149] Re: Getting Started With Development — "Carlo E. Prelz" <fluido@...> 2013/06/11

Subject: Re: Getting Started With Development

[#408198] NokoGiri XML Parser — "Devender P." <lists@...>

Hi,

11 messages 2013/06/13

[#408201] trying to load a .rb file in irb — "Eric D." <lists@...>

I am trying to load a ruby program into irb and it will not load.

12 messages 2013/06/13

[#408205] Can I use Sinatra to render dynamic pages? — Ruby Student <ruby.student@...>

Hell Team,

18 messages 2013/06/13
[#408219] Re: Can I use Sinatra to render dynamic pages? — Nicholas Van Weerdenburg <vanweerd@...> 2013/06/14

You should be able to do this without JavaScript by using streaming.

[#408228] Re: Can I use Sinatra to render dynamic pages? — Ruby Student <ruby.student@...> 2013/06/14

Well, I got some good suggestions from everyone here. I thank you all for

[#408275] Compare and sort one array according to another. — masta Blasta <lists@...>

I have two arrays of objects that look something like this:

14 messages 2013/06/17

[#408276] Comparing objects — "Thom T." <lists@...>

How do I compare two objects in Ruby, considering only attributes

15 messages 2013/06/17

[#408307] getting the most out of Ruby — robin wood <lists@...>

I write a lot of scripts in Ruby, most are small simple things but some

13 messages 2013/06/18

[#408309] Creating ruby script exe — Rochit Sen <lists@...>

Hi All,

17 messages 2013/06/18

[#408357] Beginners problem with database and datamapper — cristian cristian <lists@...>

Hi all!

28 messages 2013/06/20

[#408437] How do I input a variable floating point number into Ruby Programs — "Michael P F." <lists@...>

I want to evaluate the following interactively:

10 messages 2013/06/23

[#408518] #!/usr/bin/env: No such file or directory — Todd Sterben <lists@...>

I am new to both linux and ruby. I am using Ubuntu and Ruby 1.9

17 messages 2013/06/27

[#408528] Designing a Cabinet class — Mike Vezzani <lists@...>

Hello all,

12 messages 2013/06/27

[#408561] Find elment in array of hashes — Rodrigo Lueneberg <lists@...>

array = {:id=>1, :price =>0.25} # index[0]

23 messages 2013/06/28

Re: Compare and sort one array according to another.

From: Robert Klemme <shortcutter@...>
Date: 2013-06-17 17:57:01 UTC
List: ruby-talk #408289
On Mon, Jun 17, 2013 at 5:43 PM, masta Blasta <lists@ruby-forum.com> wrote:

> I have two arrays of objects that look something like this:
>
> arr1 = [
> Obj1(prop1, prop2, id),
> Obj2(prop1, prop2, id),
> Obj3(prop1, prop2, id)
> ]
>
> arr2 = [
> OthrObj1(prop1, prop2, ref_id),
> OthrObj2(prop1, prop2, ref_id),
> OthrObj3(prop1, prop2, ref_id)
> ]
>
> The objects in arr1 are ordered by id (just as an example). The
> objects in arr2 have a 1-1 relationship with the objects in arr1,
> however they are not sorted. They need to be sorted to match the order
> of the objects in arr1. The order of arr1 is not predictable so arr2 has
> to be compared to arr1 to find the order. The two arrays are always the
> same size. No items should repeat, however this might be something i
> need to guard against. For now let's assume no items repeat.
>
> My current solution is to make a temp array and then build it with the
> items in order. It's ok but i'm wondering if there's a better ruby
> method.
>


Something like this?

arr2.sort_by {|o| arr1.find_index {|a| o.prop1 == a.prop1 && o.prop2 ==
a.prop2}}

Kind regards

robert


-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

In This Thread