1.gem instal pik
2.pik_install C:\tools
3.cd c:\tools
4.pik add
C:\tools>pik sw
Select which Ruby you want:
1. 187: ruby 1.8.7 (2010-01-10 patchlevel 249) [i386-mingw32]
2. 200: ruby 2.0.0p0 (2013-02-24) [i386-mingw32]
3. 192: ruby 1.9.2p290 (2011-07-09) [i386-mingw32]
4. 193: ruby 1.9.3p194 (2012-04-20) [i386-mingw32]
?
Ambiguous choice. Please choose one of [].
? 2
C:\tools>ruby -v
ruby 2.0.0p0 (2013-02-24) [i386-mingw32]
C:\tools>pik sw
Select which Ruby you want:
1. 187: ruby 1.8.7 (2010-01-10 patchlevel 249) [i386-mingw32]
2. 200: ruby 2.0.0p0 (2013-02-24) [i386-mingw32]
3. 192: ruby 1.9.2p290 (2011-07-09) [i386-mingw32]
4. 193: ruby 1.9.3p194 (2012-04-20) [i386-mingw32]
以下で使用できるrubyのバージョンを切り替え
pik sw 192
C:\tools>ruby -v
ruby 1.9.2p290 (2011-07-09) [i386-mingw32]