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• What does it mean that "File Stats" are slow on Windows as the reason Ruby is slow?

  - by aronchick

  In another question I asked (why is Rake test so slow), part of the response was that: The reason is that file stat's in windows are dreadfully slow, and, since Ruby is written on Linux (and optimized for Linux), there hasn't been much work to make it faster. Can someone explain this further?

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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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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