我安装了 ruby 1.9.2:
alykhan@helium:~$ ruby -v
ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-linux]
但是在 irb 中,当我尝试时,require 'Matrix'
我得到一个错误,如下所示:
alykhan@helium:~$ irb
irb(main):001:0> require 'Matrix'
LoadError: no such file to load -- Matrix
from <internal:lib/rubygems/custom_require>:29:in `require'
from <internal:lib/rubygems/custom_require>:29:in `require'
from (irb):1
from /usr/local/ruby/bin/irb:12:in `<main>'
irb(main):002:0>
我需要安装特定的 gem 来获取 Matrix 库吗?