Gem Windows XP 下的 Ruby 升级不到 2.0 么？
C:\Documents and Settings\Administrator>gem update --system
Latest version currently installed. Aborting.
C:\Documents and Settings\Administrator>gem -v
2.0.7
C:\Documents and Settings\Administrator>ruby -v
ruby 1.9.3p392 (2013-02-22) [i386-mingw32]
C:\Documents and Settings\Administrator>rails -v
Rails 4.0.0
我用的是 railsinstaller 的 Windows 版本，装完之后用gem update --system和gem update升级了 gem。
Rails 已经升到 4.0 了，怎么 Ruby 升不到 2.0？
gem update 是管理 gem 的
[~] rvm upgrade
Usage:
rvm upgrade {source-ruby} [destination-ruby] [--force]
Description:
Upgrades the specified (already installed) source ruby given to the
given destination ruby version. Will migrate gemsets, wrappers, aliases
and environment files.
To upgrade rvm itself you want 'rvm get'.
Examples:
$ rvm upgrade 1.9.2-p136 1.9.2-p180
$ rvm upgrade ree-2011.01 ree-2011-02
[~] rvm
#1 楼 @libuchao
#2 楼 @showlovel
原来如此，那么 XP 下怎么升到 Ruby2.0 呢，我只装了个 railsinstaller。
百度了下 XP 下有个叫 pik 的东西能实现 rvm 的功能，一定要装这个？
