Ray's playground

摘要： Ruby comes with a debugger, which is conveniently built into the base system. You canrun the debugger by invoking the interpreter with the -r debug option, along with any otherRuby options and the nam... 阅读全文

摘要： RomanCode highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--1classRoman2MAX_ROMAN=49993definitialize(value)4ifvalue<=0||value>MAX_ROMAN5fail"Romanvalue... 阅读全文

摘要： This chapter covers■ Introducing Spring Security■ Securing web applications using servlet filters■ Authentication against databases and LDAP■ Transparently securing method invo... 阅读全文

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摘要： [代码] 阅读全文

摘要： [代码] 阅读全文

摘要： break terminates the immediately enclosing loop; control resumes at the statement followingthe block. redo repeats current iteration of the loop from the start but without reevaluatingthe condition or... 阅读全文

摘要： In Hibernate, objects instantiated using the new operator aren’t immediately persistent.Their state is transient, which means they aren’t associated with any databasetable row, and so thei... 阅读全文

摘要： Spring supports both programmatic and declarative transaction management.In either case, Spring shields you from having to work directly with a specifictransaction management implementation by abstrac... 阅读全文

摘要： Methods that return a boolean result (socalledpredicate methods) are often named with a trailing ?.　　Methods that are “dangerous,” or that modify their receiver, may be named with a traili... 阅读全文