经常用ri查文档的朋友，你有用过cheat吗？

cheat，一款ruby表格速查工具，偶尔在网上浏览发现的好东东，不敢独享，在这里给朋友分享一下：

安装：
gem install cheat

使用：
$cheat cheat
$cheat sheets

例子：
输入：
$cheat strftime
输出：
strftime:
 %a - The abbreviated weekday name (``Sun'')
  %A - The full weekday name (``Sunday'')
  %b - The abbreviated month name (``Jan'')
  %B - The full month name (``January'')
  %c - The preferred local date and time representation
  %d - Day of the month (01..31)
  %e - Day of the month without leading zeroes (1..31)
  %H - Hour of the day, 24-hour clock (00..23)
  %I - Hour of the day, 12-hour clock (01..12)
  %j - Day of the year (001..366)
  %k - Hour of the day, 24-hour clock w/o leading zeroes ( 0..23)
  %l - Hour of the day, 12-hour clock w/o leading zeroes ( 1..12)
  %m - Month of the year (01..12)
  %M - Minute of the hour (00..59)
  %p - Meridian indicator (``AM'' or ``PM'')
  %P - Meridian indicator (``am'' or ``pm'')
  %S - Second of the minute (00..60)
  %U - Week number of the current year,
    starting with the first Sunday as the first
    day of the first week (00..53)
  %W - Week number of the current year,
    starting with the first Monday as the first
    day of the first week (00..53)
  %w - Day of the week (Sunday is 0, 0..6)
  %x - Preferred representation for the date alone, no time
  %X - Preferred representation for the time alone, no date
  %y - Year without a century (00..99)
  %Y - Year with century
  %Z - Time zone name
  %% - Literal ``%'' character
 
  t = Time.now
  t.strftime("Printed on %m/%d/%Y") #=> "Printed on 04/09/2003"
  t.strftime("at %I:%M%p")    #=> "at 08:56AM"
  t.strftime("%e %B, %Y")      #=> "9 April, 2003"

不错吧？

不错，哈哈！