From: Brian Candler <b.candler@...>
Date: 2008-09-23T18:18:56+09:00
Subject: Re: Returning the names of each defined method

Kain Nobel wrote:
> I was curious, for code that isn't veiwable, how would I print each
> defined method in a class/module? For instance... lets say that File
> happened to be a hidden class, how could I make the interpreter p or
> print each method that is defined in class File?

What do you mean by a "hidden class", or "code that isn't viewable"? If 
the Ruby interpreter is able to read a .rb file, then so are you.

But in any case there are a number of reflection methods, for example:

irb(main):001:0> File.instance_methods - Object.instance_methods
=> ["select", "read", "<<", "lineno=", "tell", "mtime", "fileno", 
"partition", "print", "rewind", "pid", "readpartial", "grep", 
"readlines", "stat", "truncate", "tty?", "seek", "reject", "getc", 
"binmode", "to_io", "ctime", "pos", "putc", "closed?", "member?", 
"readchar", "find", "pos=", "close_read", "each_with_index", 
"each_line", "lstat", "reopen", "to_i", "collect", "sysseek", "all?", 
"entries", "fsync", "puts", "eof", "detect", "ungetc", "zip", 
"each_byte", "flock", "close_write", "syswrite", "map", "any?", "ioctl", 
"chmod", "sync", "sort", "include?", "min", "gets", "sync=", "flush", 
"find_all", "write", "isatty", "each", "atime", "sysread", "inject", 
"printf", "eof?", "fcntl", "path", "sort_by", "chown", "lineno", "max", 
"readline", "close"]

For more info see 
http://www.ruby-doc.org/docs/ProgrammingRuby/html/ospace.html
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