Ack 搜索代码库并用 vim 打开具体的匹配项

sudo aptitude install ack-grep
sudo ln -s `which ack-grep` /bin/ack
ack --help-types|less

ack hello
ack -a hello
ack --js hello
ack --nojs hello 

:Ack -a hello
:Ack -Q "*h"