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• In Ruby, using Cucumber, should I mock out calls to a webservice?

  - by Gordon McAllister

  All, I'm using Cucumber for acceptance testing a Ruby command line utility. This utility pulls data in from a webservice. I understand Cucumber is for acceptance testing and tests the whole stack but I still need to provide consistant replies from the webservice. Should I mock the webservice? If yes, how? What's the best approach here? Cheers, Gordon

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• Programmatically Log/Tail Browser Activity with Ruby to a File?

  - by viatropos

  How do I access this activity log information programmatically with Ruby (this is the Activity Window from Safari)? Can I use Mechanize to spit out all this information (duration, size, address, etc.) in XML, or is this already stored somewhere on my computer?

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• How to restrict the number of objects of a class to a given number in ruby?

  - by Hitesh Manchanda

  how can i extend the singleton pattern to a number of objects for a class i.e. how can i have only 5 objects of a class at max and not more than that in ruby

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• which is the most popular Ruby on Rails AUTHORIZATION gem/plugin at the moment?

  - by Greg

  Hi, Which is the most popular Ruby on Rails AUTHORIZATION gem/plugin at the moment? (I am using AuthLogic for authentication by the way) Thanks

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• How do I change the aws-ruby log location?

  - by brianegge

  I've found the method set_log in the documentation, I just can't figure out the syntax to call it. Here's what I tried: require 'ruby-aws' Amazon::Util::Logging.set_log('my.log') NoMethodError: undefined method `set_log' for Amazon::Util::Logging:Module

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• Why did Matz choose to make Strings mutable in Ruby?

  - by Seth Tisue

  It's the reverse of this question: http://stackoverflow.com/questions/93091/why-cant-strings-be-mutable-in-java-and-net Was this choice made in Ruby only for efficiency, or was there some other reason?

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• One-liner to Convert Nested Hashes into dot-separated Strings in Ruby?

  - by viatropos

  What's the simplest method to convert YAML to dot-separated strings in Ruby? So this: root: child_a: Hello child_b: nested_child_a: Nesting nested_child_b: Nesting Again child_c: K To this: { "ROOT.CHILD_A" => "Hello", "ROOT.CHILD_B.NESTED_CHILD_A" => "Nesting", "ROOT.CHILD_B.NESTED_CHILD_B" => "Nesting Again", "ROOT.CHILD_C" => "K" }

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• What is the best way to handle this type of inclusive logic in Ruby?

  - by Steve McLelland

  Is there a better way of handling this in Ruby, while continuing to use the symbols? pos = :pos1 # can be :pos2, :pos3, etc. if pos == :pos1 || pos == :pos2 || pos == :pos3 puts 'a' end if pos == :pos1 || pos == :pos2 puts 'b' end if pos == :pos1 puts 'c' end The obvious way would be swapping out the symbols for number constants, but that's not an option. pos = 3 if pos >= 1 puts 'a' end if pos >= 2 puts 'b' end if pos >= 3 puts 'c' end Thanks.

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• Does Ruby have an addon similar to Perl 6 grammars?

  - by dreftymac

  Perl has been one of my go-to programming language tools for years and years. Perl 6 grammars looks like a great language feature. I'd like to know if someone has started something like this for Ruby.

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• How can I use Mongrel for my non-rails ruby webapp?

  - by aharon

  I've got a non-RoR but ruby webapp in the works. So far, I've just been using requests, hacks, and mod_ruby; but I'd really like to try out Mongrel--which seems to work really well for RoR sites. I looked at the examples given in GitHub, and none of them does dynamic changing of content w/o having to restart Mongrel like you can do in RoR under dev mode. How can I do this? (Just using load doesn't work.)

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• What are the Ruby equivalent of Python itertools, esp. combinations/permutations/groupby?

  - by Amadeus

  Python's itertools module provides a lots of goodies with respect to processing an iterable/iterator by use of generators. For example, permutations(range(3)) --> 012 021 102 120 201 210 combinations('ABCD', 2) --> AB AC AD BC BD CD [list(g) for k, g in groupby('AAAABBBCCD')] --> AAAA BBB CC D What are the equivalent in Ruby? By equivalent, I mean fast and memory efficient (Python's itertools module is written in C).

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• Ruby - Platform independent way to determine IPs of all network interfaces?

  - by Tindron

  Is there an easy way in Ruby for me to get a list of the IP addresses for all network interfaces? It needs to work in Linux/Win/OSX and I'd prefer to not have to parse ifconfig/ipconfig unless I absolutely have to.

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• In Ruby on Rails, why will story.votes return an empty Array object, but story.votes.create will act

  - by Jian Lin

  In Ruby on Rails, say a Story object can "has_many" Vote objects (a story is voted "hot" by many users). So when we do a s = Story.find(:first) s is a Story object, and say s.votes returns [] and s.votes.class returns Array So clearly, s.votes is an empty Array object. At this time, when s.votes.create is called, it actually invokes a method of the Vote class? How come an Array class object can invoke a Vote class method?

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• What is the state of Ruby as a compiled language?

  - by JustSmith

  Ruby has been around for a while now so I was wondering if there was any work being done on a compiler for it? I know that compiler design is hindered by things like Eval() so I would not expect implementations to be 100 percent accurate? My own searches have turned up sparse results.

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• Can I make ruby send network traffic over a specific iface?

  - by rjorgenson

  I am writing a script that grabs the external IP address along with some other information about each iface. I can't figure out how to make ruby send traffic over a specific iface(eth0 and wlan0 for example). I am currently using the open-uri library to open http://whatismyip.org and read it into a variable. def get_external_ip begin open("http://whatismyip.org") { |f| return f.read } rescue return "none" end end Is there any way to specify this at runtime of the script or from within the script itself(ideally)?

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• With Ruby, where to use NOT, AND, OR, XOR operations for Fixnum or Bignum?

  - by Jason

  Hi, Just wondering if anyone has any realworld examples or know when you might use the NOT, AND, OR, XOR, <<, operators in Ruby. I've been programming for 4 years and never come across the need to use any of these, wondering how common actual usage is & if its something I should fully understand. Thanks, -J

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• Best practice to handle non-english characters in Ruby?

  - by ragnarius

  My program file is encoded in UTF-8 so "abc".length == 3 but "åäö".length == 6. I realize that å, ä, ö, etc. are stored as two bytes in UTF-8, and that a Ruby String is a sequence of bytes (not characters), but it is annoying! Is there a best practice to work around this problem?

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• Best practice to handle non-english characters is ruby?

  - by ragnarius

  Hi! My program file is encoded in utf-8 so "abc".length==3 but "åäö".length==6. I realize that å,ä,ö, are stored as two bytes in utf-8, and that a ruby String is a sequence of bytes (not characters), but it is annoying! Is there a best practice to work around this problem?

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• How to monitor traffic of ruby on rails website?

  - by Tony

  I have a ruby on rails application and it would be nice to see how many hits I get per hour. Is there some simple free software to do this or do I have to develop a custom solution? Thanks!

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• Is there a static analysis tool for Python, Ruby, Sql, Cobol, Perl, and PL/SQL?

  - by Raj

  I am looking for a static analysis tool for Python, Ruby, Sql, Cobol, Perl, PL/SQL, SQL similar to find bugs and check style. I am looking for calculating the line count, identify bugs during the development, and enforcing coding standard.

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• How can I host my Ruby on Rails application - no hosting providers offer SQLite3 database.

  - by Sergio Tapia

  I'm really new at Ruby on Rails development. I'm reading Head First Rails and it says that Rails uses SQLite3 as it's database system. How exactly would I go about uploading my website/application so the world can use it?

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• Front-end design first, or back-end development first? For Ruby on Rails site

  - by Victor

  I am doing everything on my own: front-end and back-end. I am proficient with HTML and CSS, but a noob in Ruby on Rails. Now that I want to develop the site, I wonder if I should start from front-end first, or back-end. Cos what I am doing for front-end now are all static. I am afraid that I have to change a lot of my front-end coding when I do my back-end.

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• How to build a Weighted Graph with Ruby's RGL or GRATR to perform Dijkstra's algorithm?

  - by Andres

  I would like to see an example of a Dijkastra search algorithm for a graph built using Ruby's RGL (http://rgl.rubyforge.org/) or GRATR (http://rubyforge.org/projects/gratr/). I know GRATR has Dijkastra support but I'm not really sure how to go about using it, any help would be appreciated.

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• How do you kill a PTY.spawn call in Ruby?

  - by viatropos

  If I run a command like this, using ruby's pty class, how do I kill it if I find a certain input string? cmd = "appcfg.py update cdn" PTY.spawn("#{cmd} 2>&1") do | input, output, pid | begin input.expect("Email:") do output.write("#{credentials[:username]}\n") end input.expect("Password:") do output.write("#{credentials[:password]}\n") end if input.gets == "SOMETHING" EXIT! end rescue Exception => e puts "GAE Error..." end end What is the right way to do that?

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• Can I have a block in begin/while statement in Ruby?

  - by jbjuly

  I'm trying out to have a block in a while and begin statements in Ruby, but I get a syntax error. Any other way to implement it? Here's what I want to accomplish (1..limit).each { |i| while (true) do |n| x = n * (i%n) puts n if n%i != 0 break if x.even? && !x.zero? n += 1 end }

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