#ruby1.9

Resolved: How to install the latest version of Ruby and Ruby on Rails in Ubuntu? #answer #programming #solution

How to install the latest version of Ruby and Ruby on Rails in Ubuntu?

I installed Ruby with the command apt-get install ruby1.9.1, but when I enter ruby in the console, nothing happens.

I have to use the command

ruby1.9.1-v ruby 1.9.2p0 (2010-08-18 revision 29036) [i686-linux]

But how do I call it with ruby and not ruby1.9.1? And how do I install Rails?

Answer [by slhck]: How to install the…

Currently in StreetEasy we're moving a Rails app from Ruby 1.8 to 1.9

In Ruby 1.9 FasterCSV is already included as standard library's CSV. And in Ruby 1.9 you can't continue using FasterCSV, if you do, you'll get an error message like this:

Please switch to Ruby 1.9's standard CSV library. It's FasterCSV plus support for Ruby 1.9's m17n encoding engine.

The workaround for this is, instruct bundler to include fastercsv only if I'm running ruby 1.8:

gem 'fastercsv', :platforms => :ruby_18

And change references in the application from FasterCSV to CSV, and add this (in a Rails app usually in the config/environment.rb):

require 'csv' if CSV.const_defined? :Reader # Ruby 1.8 compatible require 'fastercsv' Object.send(:remove_const, :CSV) CSV = FasterCSV else # CSV is now FasterCSV in ruby 1.9 end

ファイルのエンコード指定をしても、UTF-8で出力されてしまったので、中身をトランスコードしてやりました。

row = ["a", "b", "c", "d"] open("output.csv", "w:Shift_JIS") do |f| f.puts CSV.generate_line( row ).encode('Shift_JIS') end

古いバージョンのパッケージを一掃しようとしたところ、次のエラーが表示されて、Ruby 1.9.2 がアンインストールできなかった。

$ sudo port uninstall inactive ---> Uninstalling ruby19 @1.9.2-p0_1+nosuffix Error: port uninstall failed: list element in braces followed by "/cdesc-dig" instead of space

対応策は macports.conf を更新すればよい。

$ cd /opt/local/etc/macports/ $ sudo cp macports.conf macports.conf.old $ sudo cp macports.conf.default macports.conf $ sudo port sync

lifeLOG + REPOsitory: MacPorts を 1.8.x から 1.9.x へアップグレードした場合の注意点