# Enumerable-extra 0.1.0 **URL:** \ **Category:** Ruby\ **Created:** [May 14, 2009, 6:09pm UTC](https://www.ruby-forum.com/t/enumerable-extra-0-1-0/167986 "2009-05-14T18:09:21Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![danielb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/c57346/32.png) [@danielb](https://www.ruby-forum.com/u/danielb)\ **Post date:** [May 14, 2009, 6:09pm UTC](https://www.ruby-forum.com/t/enumerable-extra-0-1-0/167986/1 "2009-05-14T18:09:21Z")
Hi, Convinced that Symbol#to\_proc is mostly a solution in search of a problem, I’ve released enumerable-extra 0.1.0. = What is it? The enumerable-extra library overrides Enumerable#map, Array#map and Array#map to accept a method, with optional arguments, that are performed on every element of the list. For example, instead of this: array.map{ |e| e.capitalize } You can do this: array.map(:capitalize) # Capitalize every element You can also mix and match: array.map(:capitalize){ |e| e + ‘x’ } # Add ‘x’ after capitalizing every element = Why is it better than Symbol#to\_proc ? First, it doesn’t require additional notation, i.e. no “&”, no “its”, no “self” - just a method name. In my opinion, that makes the syntax cleaner. Second, Symbol#to\_proc is slow. = How do I get it? gem install enumerable-extra = Caveat This is for Ruby 1.8.x only. Enjoy! Dan ---
**Author:** ![danielb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/c57346/32.png) [@danielb](https://www.ruby-forum.com/u/danielb)\ **Post date:** [May 14, 2009, 7:31pm UTC](https://www.ruby-forum.com/t/enumerable-extra-0-1-0/167986/2 "2009-05-14T19:31:41Z")
Would this be usable with a RoR app? I am not certain if RoR core needs Symbol#to\_proc … but, it would be nice to use enumerable-extra in my Ruby coding in RoR. I am just iffy about trying it cause I am not certain if I would break my RoR app because I installed the gem and the gem overirides Enumberable#map and so forth. Thanks 🙂 Sorry if it seems like a newb question, but I am learning both Ruby and RoR at the same time – so, in a sense I am a newb 😛 ---
**Author:** ![danielb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/c57346/32.png) [@danielb](https://www.ruby-forum.com/u/danielb)\ **Post date:** [May 14, 2009, 7:40pm UTC](https://www.ruby-forum.com/t/enumerable-extra-0-1-0/167986/3 "2009-05-14T19:40:32Z")
On May 14, 11:30 am, Joshua C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > at the same time – so, in a sense I am a newb 😛 > It might, I haven’t tried. It might depend on the order of your > require statements, too, because I haven’t looked at their > implementation. The best way to find out is to run your tests. I’m curious about the results myself. Note that, with no arguments it works the same as the standard MRI version, so you can still do this: array.map{ |e| e.capitalize } Regards, Dan ---
**Author:** ![danielb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/c57346/32.png) [@danielb](https://www.ruby-forum.com/u/danielb)\ **Post date:** [May 15, 2009, 3:56pm UTC](https://www.ruby-forum.com/t/enumerable-extra-0-1-0/167986/4 "2009-05-15T15:56:08Z")
On May 15, 1:47 am, Martin DeMello [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > On Thu, May 14, 2009 at 9:38 PM, Daniel B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > = Why is it better than Symbol#to\_proc ? > > > First, it doesn’t require additional notation, i.e. no “&”, no “its”, no > > “self” - just a method name. In my opinion, that makes the syntax cleaner. > > Second, Symbol#to\_proc is slow. > > This looks very nice! What would it take to port to ruby 1.9? I’m not sure. I declared that it was for 1.8.x only because I hadn’t tested it with 1.9.x and I wasn’t sure if it would break its builtin Symbol#to\_proc support, or what would happen. I’ll do some testing later this week with 1.9.x and see what happens. Regards, Dan ---
**Author:** ![danielb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/c57346/32.png) [@danielb](https://www.ruby-forum.com/u/danielb)\ **Post date:** [May 15, 2009, 9:47am UTC](https://www.ruby-forum.com/t/enumerable-extra-0-1-0/167986/5 "2009-05-15T09:47:43Z")
On Thu, May 14, 2009 at 9:38 PM, Daniel B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > = Why is it better than Symbol#to\_proc ? > > First, it doesn’t require additional notation, i.e. no “&”, no “its”, no > “self” - just a method name. In my opinion, that makes the syntax cleaner. > Second, Symbol#to\_proc is slow. This looks very nice! What would it take to port to ruby 1.9? martin ---
**Author:** ![danielb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/c57346/32.png) [@danielb](https://www.ruby-forum.com/u/danielb)\ **Post date:** [May 15, 2009, 4:37pm UTC](https://www.ruby-forum.com/t/enumerable-extra-0-1-0/167986/6 "2009-05-15T16:37:50Z")
On Thu, May 14, 2009 at 1:39 PM, Daniel B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > Thanks 🙂 > > Note that, with no arguments it works the same as the standard MRI > version, so you can still do this: > > array.map{ |e| e.capitalize } There SHOULDN’T be a conflict since Rails/ActiveSupport doesn’t change the map method it only adds a to\_proc method to Symbol. require ‘rubygems’ require ‘activesupport’ require ‘enumerable/extra’ p %w{a b c}.map(:upcase) p %w{a b c}.map(&:upcase) # =\> p %w{a b c}.map(:upcase, &:downcase) [“A”, “B”, “C”] [“A”, “B”, “C”] [“a”, “b”, “c”] Now whether or not combining these is a good idea, I don’t know. – Rick DeNatale Blog: [http://talklikeaduck.denhaven2.com/](http://talklikeaduck.denhaven2.com/) Twitter: [http://twitter.com/RickDeNatale](http://twitter.com/RickDeNatale) WWR: [http://www.workingwithrails.com/person/9021-rick-denatale](http://www.workingwithrails.com/person/9021-rick-denatale) LinkedIn: [http://www.linkedin.com/in/rickdenatale](http://www.linkedin.com/in/rickdenatale) ---
**Author:** ![danielb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/c57346/32.png) [@danielb](https://www.ruby-forum.com/u/danielb)\ **Post date:** [May 15, 2009, 6:01pm UTC](https://www.ruby-forum.com/t/enumerable-extra-0-1-0/167986/7 "2009-05-15T18:01:15Z")
On Fri, 15 May 2009 01:08:12 +0900 “Daniel B.” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > array.map(:capitalize){ |e| e + ‘x’ } # Add ‘x’ after capitalizing > every element > > = Why is it better than Symbol#to\_proc ? > > First, it doesn’t require additional notation, i.e. no “&”, no “its”, > no “self” - just a method name. In my opinion, that makes the syntax > cleaner. Second, Symbol#to\_proc is slow. Sorry, but Symbol#to\_proc is actually the faster way since it was added into the core, so your statement is only true for \< 1.8.6. Benchmark at: [http://pastr.it/15719](http://pastr.it/15719)