七段

无论怎样，请让我先感谢一下国家。
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2010年7月18日 #

有25匹马，每匹马都以一个固定不变的速度奔跑，每匹马的速度都不一样，如果让你找出跑的最快的5匹马，最少需要组织多少场比赛？注：每场比赛最多只能5匹马参赛。
有25匹马，每匹马都以一个固定不变的速度奔跑，每匹马的速度都不一样，如果让你找出跑的最快的5匹马，最少需要组织多少场比赛？注：每场比赛最多只能5匹马参赛。
re:悲观10场，乐观7场。
posted @ 2012-03-07 21:17 sevenduan 阅读(825) | 评论 (1) | 编辑 收藏

Really Useful Shortkey
Eclipse:
ctrl+o
ctrl+space
ctrl+t
ctrl+k
ctrl+f8/f9/f10

alt+shift+x , t/j
alt+shift+d , t/j

Command:
cd -
tab
ctrl+a/e
ctrl+u/k/w

Vim
shift+g
m+'mark'
`+'mark'
. (repeat)



posted @ 2010-08-07 23:14 sevenduan 阅读(242) | 评论 (0) | 编辑 收藏

Java logging framework
Framework Supported log levels Standard appenders Popularity Cost / licence
Log4J FATAL ERROR WARN INFO DEBUG TRACE AsyncAppender, JDBCAppender, JMSAppender, LF5Appender, NTEventLogAppender, NullAppender, SMTPAppender, SocketAppender, SocketHubAppender, SyslogAppender, TelnetAppender, WriterAppender Widely used in many project and platforms Apache License, Version 2.0
Java Logging API SEVERE WARNING INFO CONFIG FINE FINER FINEST Depends on the underlying framework; Sun's default Java Virtual Machine (JVM) has the following: ConsoleHandler, FileHandler, SocketHandler, MemoryHandler Not widely used[citation needed] Comes with the JRE
Apache Commons Logging FATAL ERROR WARN INFO DEBUG TRACE Depends on the underlying framework Widely used, in conjunction with log4j Apache License, Version 2.0
SLF4J ERROR WARN INFO DEBUG TRACE Depends on the underlying framework, which is pluggable Probably small but growing MIT License
posted @ 2010-07-18 22:15 sevenduan 阅读(481) | 评论 (0) | 编辑 收藏