ruby-2.0

I'm looking for an idiomatic way to get the time passed since a given date in hours, minutes and seconds. If the given date is 2013-10-25 23:55:00 and the current date is 2013-10-27 20:55:09, the returning value should be 45:03:09. The time_difference and time_diff gems won't work with this requirement. You can try with this: def time_diff(start_time, end_time) seconds_diff = (start_time - end_time).to_i.abs hours = seconds_diff / 3600 seconds_diff -= hours * 3600 minutes = seconds_diff / 60 seconds_diff -= minutes * 60 seconds = seconds_diff "#{hours.to_s.rjust(2, '0')}:#{minutes.to_s.rjust(2

I'm working on a Rails 4 (using the release candidate) project and now need to collaborate with someone on a Windows machine. I can't even get a basic webpage to come up, however :(. It was quite a pain even installing sqlite3 using Ruby 2.0. Now, when I try to get a webpage up (I just created a dummy /home/index controller and view), I get this error: Showing C:/Users/me/RubymineProjects/test_project/app/views/layouts/application.html.erb where line #6 raised: (in C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/turbolinks-1.1.1/lib/assets/javascripts/turbolinks.js.coffee) Extracted source (around

I don't understand completely how named parameters in Ruby 2.0 work. def test(var1, var2, var3) puts "#{var1} #{var2} #{var3}" end test(var3:"var3-new", var1: 1111, var2: 2222) #wrong number of arguments (1 for 3) (ArgumentError) it's treated like a hash. And it's very funny because to use named parameters in Ruby 2.0 I must set default values for them: def test(var1: "var1", var2: "var2", var3: "var3") puts "#{var1} #{var2} #{var3}" end test(var3:"var3-new", var1: 1111, var2: 2222) # ok => 1111 2222 var3-new which very similar to the behaviour which Ruby had before with default parameters'

What is the problem with this Ruby 2.0 code? p (1..8).collect{|denom| (1...denom).collect{|num| r = Rational(num, denom) if r > Rational(1, 3) and r < Rational(1, 2) return 1 else return 0 end } }.flatten The error is in block (2 levels) in <main>': unexpected return (LocalJumpError) . I want to create a flat list containing n ones (and the rest zeroes) where n is the number of rational numbers with denominators below 8 which are between 1/3 and 1/2. ( it's a Project Euler problem ). So I'm trying to return from the inner block. You can't return inside a block in Ruby * . The last statement

Installing Ruby 2.0.0 and Rails 4.0.0beta1 on the default Amazon EC2 Linux install (Amazon Linux AMI 2012.09.1) goes smoothly. But openssl gets in the way (eg http://railsapps.github.com/openssl-certificate-verify-failed.html ) and weird either prevent openssl from getting installed or causing the RubyGem package manager from installing rails. How can I work around these problems? Log into your brand new instance: [19:59:22] paul:~ $ ssh -i ~/.ssh/server.pem ec2-user@your.ip __| __|_ ) _| ( / Amazon Linux AMI ___|\___|___| https://aws.amazon.com/amazon-linux-ami/2012.09-release-notes/ and

I want to install ruby 2.0 using sudo apt-get install ruby2.0 But there isn't available package for ruby2.0 I want to install it using apt-get install the same like ruby 1.9.1 Any suggestions? danmanstx sudo apt-get -y update sudo apt-get -y install build-essential zlib1g-dev libssl-dev libreadline6-dev libyaml-dev cd /tmp wget http://ftp.ruby-lang.org/pub/ruby/2.0/ruby-2.0.0-p451.tar.gz tar -xvzf ruby-2.0.0-p451.tar.gz cd ruby-2.0.0-p451/ ./configure --prefix=/usr/local make sudo make install from here How do I install ruby 2.0.0 correctly on Ubuntu 12.04? UPDATE for ruby 2.1.5 sudo apt-get

I'm a complete n00b on Rails with only beginner knowledge of Ruby. I plan on studying Ruby more before I really learn Rails, but I'm waayy too curious for my own good. Anyway, I was following the tutorial, but I got stuck when it said to type "rails server" in the blog directory. It states, "Specified 'sqlite3' for database adapter, but the gem is not loaded. Add gem 'sqlite3' to your Gemfile." So I quit the server, installed sqlite3, reinstated the server...only to get this message again. sqlite3 doesn't show up when I do "gem list", but I do see the folder in my Root Ruby directory. If it