Questions about Ruby, dynamic, reflective, general-purpose object-oriented programming language that combines syntax inspired by Perl with Smalltalk-like features.
0
votes
1answer
91 views
How does dependency inversion principle work in languages without interfaces?
In C#/Java, the dependency inversion principle is often demonstrated by high-level classes that depends on an interface/abstraction (that it owns). Low-level classes will implement the interface, thus ...
2
votes
1answer
110 views
Attempt at understanding the double-dispatch pattern
I've been trying to grok the double-dispatch pattern and having a hard time. I finally attempted a sample program to help myself understand. Here's the gist. But then I decided to attempt it without ...
-2
votes
1answer
111 views
Preliminary Ruby Resources [closed]
I've been programming with PHP for awhile as both a professional/hobbyist and would like to learn Ruby as well. I was going to pick up Agile Web Development with Rails and was wondering if there is ...
0
votes
1answer
68 views
Online stores service design
I am designing an online store service app with rails. Everyone who wants to make his/her own store can do it with this app by just signing up and choosing a domain. I want to make it as SaaS as it ...
2
votes
0answers
214 views
How difficult would it be to port Rails to PHP 5.4? [closed]
I have no intention or desire to do this, but out of idle curiosity, what would be some of the "gotchas" if one were to want to port Rails to PHP 5.4? Would it be possible with a fairly straight ...
-1
votes
1answer
217 views
Simple game using Ruby on Rails [closed]
I want to create a simple game like tic-tac-toe or connect4 or something like that using Rails. I have a (very) basic idea of how to write a Rails app with regular html elements, but I don't really ...
8
votes
2answers
217 views
Is Non-Deterministic Resource-Management a Leaky Abstraction?
From what I can see, there are two pervasive forms of resource-management: deterministic destruction and explicit. Examples of the former would be C++ destructors and smart pointers or Perl's DESTROY ...
1
vote
1answer
132 views
Should an open source gem contain .rvmrc?
Using .rvmrc seems to be considered a best practice for apps.
But should an open source gem contain .rvmrc in their source code on Github? I think it's not good to require everyone who wants to ...
1
vote
1answer
88 views
Ruby manager for Windows: Is Ruby's PIK alive or dying?
At first, please forgive probably offtopic and/or notconstructive question, but I truly have no idea where to ask it. At first I targetted StackOverflow there's at least some PIK-related traffic ...
1
vote
1answer
64 views
Building an RPC framework
I'm curious about what it takes to build a simple and robust RPC framework. I've only looked at a few ruby frameworks but they are all lacking in some way. What I want out of an RPC framework is some ...
0
votes
1answer
156 views
When can one call themselves a “Rubyist”? [closed]
I was wondering what that term even meant. Is it something to do with one's amount of knowledge about the Ruby language or just the plain idea of using it. When can one call themselves a "Rubyist"?
20
votes
6answers
860 views
How to avoid giant glue methods?
In my current job, I've been tasked with cleaning up old code a few times. Often the code is a labyrinth and the data behind it is even more tangled. I find myself combing out things into nice, ...
3
votes
3answers
188 views
Is there an idiom for a loop that executes some block of instructions between iterations? (In Ruby in particular)
I often need to do some operations in a loop and some other operations between the iterations. A simple example would be collecting words from an array into a string, spelled backwards and separated ...
2
votes
3answers
165 views
Setting up a simple Ruby\Rails environment
I am coming from a .NET background and beginning my journey into the Mac OSX\Ruby\Rails environment.
A lot of the resources I have found such as this one have between 5-10 steps for setting up a ...
2
votes
2answers
253 views
How to fix bad fundamentals? [closed]
I am a native PHP developer, and have been for about a year or so. I love PHP and it was very easy for me to learn, but I have developed some bad habits along the way due to never having a formal ...
2
votes
1answer
109 views
Does it make sense to create a Ruby wrapper to reference a Java object that does exactly the same thing?
I am using JRuby.
In my Java code, I have a class called Texture, capable of doing some graphic manipulation stuff.
In my Ruby code, I will usually need to draw things, so though I should simply ...
2
votes
1answer
262 views
What is a closure and how is it implemented in Ruby?
In the context of the Ruby programming language, what is a closure and when do you use one? What are the uses for it in Rails?
0
votes
2answers
196 views
How to execute a Ruby file in Java, capable of calling functions from the Java program and receiving primitive-type results?
I do not fully understand what am I asking (lol!), well, in the sense of if it is even possible, that is. If it isn't, sorry.
Suppose I have a Java program. It has a Main and a JavaCalculator class. ...
0
votes
3answers
129 views
Render Ruby object to interactive html
I am developing a tool that discovers network services enabled on host and writes short summary on them like this:
init,1
└── login,1560 --
└── bash,1629
└── nc,12137 -lup 50505
{
...
-2
votes
1answer
138 views
Where can I find out about basic python usage, cli, editor and testing? [closed]
I'm coming from Ruby / Ruby on Rails to Python.
Where can I find or find resources about:
The command prompt, what is python's version of 'irb'
info and recommendations on editors, plugins and IDE's
...
0
votes
1answer
92 views
Should tests be in the same Ruby file or in separated Ruby files?
While using Selenium and Ruby to do some functional tests, I am worried with the performance. So is it better to add all test methods in the same Ruby file, or I should put each one in separated code ...
3
votes
1answer
216 views
combining ruby and C++
I've been discussing a conceptual project with a friend of mine and the the most effective way we've seen of doing it is writing the engine in C++ while the logic would be done in Ruby.
However, we ...
0
votes
2answers
160 views
Question about initial interview for job [closed]
So I feel kind of stupid having to ask this but tomorrow I have a phone interview with a good company. Phone interviews themselves not a big deal for me, but having to tell them my salary ...
9
votes
1answer
487 views
Classless tables possible with Datamapper?
I have an Item class with the following attributes:
itemId,name,weight,volume,price,required_skills,required_items.
Since the last two attributes are going to be multivalued, I removed them and ...
7
votes
4answers
272 views
Is it okay to define a [] method in ruby's NilClass?
Ruby by default does not include the method [] for NilClass
For example, to check if foo["bar"] exists when foo may be nil, I have to do:
foo = something_that_may_or_may_not_return_nil
if foo ...
5
votes
7answers
425 views
Getting my younger brother started on programming [closed]
My younger brother is 13 years old, I started programming when I started to develop Android applications when I was 15, last year my brother gained an interest in it and he would always pestering me ...
0
votes
1answer
84 views
How do global cancel/exit commands work in bash?
As I have done multiple times before, I've written bash scripts, and just general commands that go nowhere. They just blink the little command line cursor at me for infinity until I control+C the ...
5
votes
2answers
324 views
What can procs and lambdas do that functions can't in ruby
I've been working in Ruby for the last couple weeks, and I've come to the subject of procs, lambdas and blocks. After reading a fair share of examples from a variety of sources, I don't how they're ...
-2
votes
1answer
241 views
Ruby: how to step through ruby code [closed]
I'm trying to learn how to step through Ruby code (written by more experienced programmers) in order to improve my knowledge of Ruby. Problem is that I don't really know how to do it well. Googling ...
-2
votes
3answers
251 views
Writing a DB Python or Ruby [closed]
I am planning on writing a database. I know it's crazy and people will tell me there is no good reason to do so. I am really using it to get better at programming overall, this database wont be used ...
5
votes
2answers
313 views
How relevant is UTF-7 when it comes to parsing emails?
I recently implemented incoming emails for an application and boy, did I open the gates of hell? Since then every other day an email arrives that makes the app fail in a different way.
One of those ...
1
vote
2answers
174 views
What is faster and preferable way for variable assignment in ruby? [closed]
I am a RoR developer and want to clarify some doubt about ruby variable assignment.
In ruby we have two ways for variable assignment.
str, arr, num = "Hi", [1, 2], 3
and
str = "Hi"
arr = [1, 2]
...
5
votes
4answers
3k views
Can we create desktop application with Ruby?
I know the Ruby on Rails framework is only for web development and not suitable for desktop application development. But if a ruby programmer wants to develop a desktop application, is it suitable and ...
2
votes
2answers
256 views
Should I prefer instance methods over class methods in Ruby?
I'm working on a rails application, and I've been pulling functionality out of my rails code and into pure ruby classes in lib/. I've found myself often writing classes like this:
class ...
1
vote
2answers
646 views
Is it worth converting a Django project to Rails?
I have a project I shelved a while back- it was essentially a working web app built in django but I stopped working on it to work on something else.
I plan on starting it up again in my spare time, ...
0
votes
3answers
289 views
How can I teach my 12 years old brother how program? [duplicate]
Possible Duplicate:
What are some good tools for introducing kids to programming?
Explaining programming to a child
I have a 12 years old brother whom asks me how he can build a website, ...
0
votes
2answers
235 views
How do I read API documentation?
I've been trying to read through the RoR API to try to learn things that the tutorial missed, and I haven't been able to follow it at all. The only time I've read documentation was when I needed to ...
2
votes
3answers
209 views
What is a legitimate reason to use Cucumber?
I've worked in several contracts where the client used Cucumber and I've often felt that the testing suite didn't really have a place in our stack.
From what I understand, business ...
1
vote
2answers
97 views
How to start a ruby community? [closed]
We are trying to start a ruby community in Guadalajara, México.
Does anyone has experience or ideas that can share regarding how to start and what can be done to be successful?
2
votes
3answers
160 views
Ruby/RoR development: desktop or server
Our company has started development of own systems "in-house". We already got couple of developers, who will be responsible for writing code in Ruby/RoR.
We are currently discussing about ...
2
votes
1answer
127 views
Is it possible to use RubyGnome2's/QtRuby's HTML renderers to make UI for a Ruby script?
I'd like to make a graphical user interface for my script, instead of running it from the console. I'm aware there's a wealth of UI libraries for Ruby, but I'm quite familiar with HTML and CSS and I'd ...
2
votes
6answers
1k views
How much Ruby should I learn before moving to Rails?
Just a quick question..
I can never get a definitive answer when googling this, either. Some people say you can learn Rails without knowing any Ruby, but at some point you'll run into a brick wall and ...
21
votes
6answers
2k views
Explanation on how “Tell, Don't Ask” is considered good OO
This blogpost was posted on Hacker News with several upvotes. Coming from C++, most of these examples seem to go against what I've been taught.
Such as example #2:
Bad:
def ...
1
vote
2answers
100 views
Cataloging events, projects and tasks: Is SQL appropriate?
I have this idea for a database: it would hold everything I "need to remember", and allow future coding projects to access the information. These future projects include a day-planner and historical ...
2
votes
1answer
135 views
How to identify a PDF classification problem?
We are crawling and downloading lots of companies' PDFs and trying to pick out the ones that are Annual Reports. Such reports can be downloaded from most companies' investor-relations pages.
The PDFs ...
1
vote
1answer
140 views
Ruby using the Gosu framework: why it runs slow first time?
I'm creating a Ruby game using the Gosu framework. All good.
Sometimes, when I run the game, it has some kind of slow startup, and probably it will be rather slow during the whole game. So I close it ...
1
vote
3answers
159 views
If I use Ruby Migrations, do I have to use the rest of Ruby on Rails?
I'm currently trying to come up with a database migrations strategy for my organization. This includes getting the database scripts into source control, managing versioning, managing releases to QA / ...
0
votes
1answer
131 views
In rails, what defines unit testing as opposed to other kinds of testing [closed]
Initially I thought this was simple: unit testing for models with other testing such as integration for controller and browser testing for views.
But more recently I've seen a lot of references to ...
1
vote
1answer
222 views
When to use mixins in Ruby
I am wondering when to use mixins? I have read about them. Many authors compare them to interfaces, abstract classes, etc.
Mixins are modules that are mixed-in and modules are a way to group similar ...
-1
votes
1answer
335 views
What is the difference between class level attributes, Class constants and singleton methods?
What the difference given they all exist 'once per class'.
When should I use one over another, i.e. for what purpose?
I use Ruby.
