#ruby-lang on 2015-04-04 — irc logs at freenode.irclog.whitequark.org

2015-03-07 13:37 apeiros changed the topic of #ruby-lang to: Ruby 2.2.1; 2.1.5; 2.0.0-p643: https://ruby-lang.org || Paste code on https://gist.github.com

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03:53 <ruby-lang834> Is there a way to take a block, capture its code for later with string interpolation, and then instance_eval it at a later time? (ruby 2.2) Any suggestions greatly appreciated https://gist.github.com/activefx/5460d9236ba0ba7f1800

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04:44 <womble`> ruby-lang834: Why would you use string interpolation when you've already got a block?

04:44 * womble` reads the gist

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04:49 <womble`> ruby-lang834: https://gist.github.com/mpalmer/7297631d4236479744da

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04:59 <ruby-lang834> womble: Thanks for taking a look. The example I posted was meant to be trivial. Here's the code that I'm working on: https://gist.github.com/activefx/cb5da877014d40b4702d I've temporarily solved the problem by including a module, setting class variables on the module that reference the blocks, and then referencing those class variables within the interpolated text

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05:33 <womble> ruby-lang834: I still don't get why you wouldn't just use define_method

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05:45 <ruby-lang834> womble: I will probably end up going back that way. I wanted the DSL contained in modules at the top of the inheritance hierarchy, and this method provided for easier overrides.

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06:49 <Zen-Zen> hello ruby-lang... I opened a Github and posted my first Gist. Now I have a question for the smarties in here...

06:49 <Zen-Zen> https://gist.github.com/CafeFerguson/b66bb870e49a5bc4b3a6

06:49 <Zen-Zen> What is wrong with this snippet.

06:50 <tbuehlmann> Zen-Zen, I assume you mean why the symbols array containts strings eventually?

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06:52 <Zen-Zen> tbue... I am not sure. I am brand new to Ruby.

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06:53 <Zen-Zen> I am taking a college class and going through an online Codeacademy at the same time.

06:53 <Zen-Zen> Stuck on this in CodeAcademy and cannot advance.

06:53 <tbuehlmann> you're asking what's wrong with the code. nothing, it seems, it should do what you ask it to do

06:53 <tbuehlmann> what's the problem you encounter?

06:55 <djellemah> Zen-Zen: .each do |s|

06:55 <Zen-Zen> The error msg is I did not create a variable called symbols... but it looks like I did.

06:55 <tbuehlmann> djellemah, perfect, didn't even see that

06:56 <djellemah> tbuehlmann: missing semicolon syndrome -)

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06:57 <Zen-Zen> thx djellemah... you are correct, I had it your way and I changed it just to see if that would fix it.

06:57 <Zen-Zen> Now it reads I did not make HTML a symbol... so confused.

07:00 <Zen-Zen> On a side question is a Gist just code for public sharing as opposed to creating a file on GitHub?

07:01 <tbuehlmann> Zen-Zen, it's for having snippets and sharing

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07:01 <tbuehlmann> back to your problem: you don't save symbols in the symbols array, you save strings

07:02 <djellemah> Zen-Zen: Read this very carefully: http://ruby-doc.org/core-2.2.0/String.html#method-i-to_sym

07:02 <tbuehlmann> `s.to_sym` returns a symbol, but `s` is not changed by that. `s` is still the string

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07:02 <djellemah> ^ what he said

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07:04 <Zen-Zen> Thx a bunch, I appreciate both of yours help!

07:04 <Zen-Zen> Sry for the rookie questions.

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07:16 <Zen-Zen> Got it, thx again....

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17:30 <nofxx> If I have a class inherited from array (CoolArray < Array) to convert plain arrays to my class anything better than/wrong with CoolArray.new(obj) ?

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17:33 <apeiros> nofxx: looks fine

17:33 <apeiros> nofxx: beware, though, subclassing a class you don't own is IMO a code smell. better use composition instead of inheritance.

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17:38 <nofxx> apeiros, thank you. In this particular case there's no overwriting, only some methods additions, don't look so bad

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17:40 <apeiros> nofxx: well, one problem you face is that e.g. CoolArray#select will return Array, not CoolArray

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17:47 <nofxx> apeiros, I see that a feature. The scenario: Polygon < Array, if you select a subset it's no longer a Polygon

17:47 <nofxx> see any better approach?

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17:48 <nofxx> it's not a full blown geometric lib, just a wrapper for mongoid btw

17:48 <apeiros> nofxx: if I select 4 points (3 edges) out from an 8 points (7 edges) polygon, I still have a polygon IMO

17:48 <nofxx> apeiros, you don't unless you close it... I may agree if it's LineString < Array

17:49 <apeiros> as said, I'd use composition, not inheritance. that is, have an instance variable @points e.g., and implement all methods. also see Forwardable and Delegator for simple delegation.

17:50 <jhass> point is, it varies from case to case whether it is expected, which makes it potentially unexpected. With composition you have more control or are at least less likely to oversee something

17:50 <jhass> er, *overlook

17:50 <nofxx> I see... practically that will be include Enumerable and def yield ? refresh my poor memory

17:51 <apeiros> def each

17:51 <nofxx> thanks again

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17:55 <yxhuvvd> is yield even a legal method name?

17:55 <yxhuvvd> >> def yield; end;

17:55 <eval-in_> yxhuvvd => :yield (https://eval.in/308578)

17:56 <yxhuvvd> appears so.

17:56 <jhass> calling it is a bit trickier ;)

17:58 <Mon_Ouie> You can find several methods named the same as keywords in core ruby though. Range#begin and Range#and, Object#class, Fiber.yield, etc.

17:59 <yxhuvvd> Mon_Ouie, good point

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18:02 <apeiros> just can't use them as lvar name

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18:07 <nofxx> How to mimic Array`s behavior of returning a default value? In the class Polygon; include Enumerable; attr_accessor :points, Can I skip writing #points everytime?

18:07 <nofxx> Polygon.new([1,2]) == [1,2]

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18:09 <nofxx> hm, actually that's doesn't looks like a good idea, but out of curiosity then... kinda a #to_o, def self...

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18:13 <yxhuvvd> nofxx: you could do something like def Polygon.[] x,y; end and then call it would Polygon[1,2]

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18:15 <yxhuvvd> and define your own == to automatically call points if there is an array on the right hand side

18:16 <nofxx> yxhuvvd, that works when myobj == foo , but won't with foo == myobj or foo.anything(obj)

18:16 <yxhuvvd> true.

18:17 <yxhuvvd> to_ary could work if that is wanted.

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18:17 <yxhuvvd> (I think)

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18:22 <nofxx> yxhuvvd, something like def to_obj; points end strange is that the default of your class is going to be another class, but, would work.

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18:49 <yorickpeterse> this channel is surprisingly active for the easter holidays

18:49 <yorickpeterse> probably a bunch of non believers in here

18:49 * yorickpeterse shakes pitchfork

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18:51 <maloik> the iso_countries gem has a hash that contains this: ":af => N_("Afghanistan"),"

18:52 <maloik> does anyone know what N_(str) is?

18:52 <maloik> bit hard to search on

18:52 <nofxx> yorickpeterse, is there the don't eat meat thing in your country also?

18:53 <nofxx> chocolate or real eggs?

18:53 <jhass> maloik: looks like a method call

18:53 <maloik> I think it is yea but no luck finding what it is so far

18:53 <yorickpeterse> nofxx: Oh yeah, chocolate easter eggs are a thing here

18:53 <yorickpeterse> kids love it

18:53 <maloik> https://github.com/koke/iso_countries in case you'd care to have a look

18:53 <jhass> maloik: it's gettext

18:54 <jhass> https://www.omniref.com/?utf8=%E2%9C%93&q=N_&commit=Search

18:54 <yorickpeterse> ^ about to say that

18:54 <yorickpeterse> the include Gettext should probably give it away :P

18:54 <yorickpeterse> https://github.com/koke/iso_countries/blob/84679d807d5ab45ec968cfa49651fdeaf85f791a/lib/country_list.rb#L3

18:55 <maloik> yep, just found that

18:55 <maloik> overlooked it

18:55 <nofxx> my grandpa use to have a barbecue on holy friday, actually depicts what christianity is: you may do wrong 364 days of the year if you just do it right one day

18:56 <yorickpeterse> hahaha

18:56 <yorickpeterse> did he

18:56 <yorickpeterse> BBQ for our sins?

18:56 <yorickpeterse> ( •_•) ( •_•)>⌐■-■ (⌐■_■)

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18:57 <maloik> yorick broke my irc client

18:57 <nofxx> yorickpeterse, kardecist fanatic

18:57 <yorickpeterse> lol

18:57 <maloik> and yes yes I know, fix my terminal/irssi client

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18:59 <yorickpeterse> maloik: http://weechat.org/

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19:29 <darix> maloik: your terminal font probably

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19:34 <maloik> pffft effort

19:34 <maloik> this works, it's fine

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20:38 <ruby-lang828> http://stackoverflow.com/questions/29451129/view-routes-in-sinatra

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21:42 <rails038> hi

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21:43 <jhass> hi

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21:44 <rails038> i'm looking for a ror programmer for a project. maybe someone can help me finding one?

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21:44 <jhass> don't think so, this isn't really a job board

21:45 <jhass> if anywhere #RubyOnRails anyway

21:45 <jhass> not saying that place is a job board either though

21:45 <rails038> k, ty

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