From: Mike Stok <mike@...>
Date: 2006-03-22T08:13:31+09:00
Subject: Re: Newbie: Printing hex formatted string using printf


On 21-Mar-06, at 6:11 PM, Mike Stok wrote:

> Because printf is a method of Kernel
>
> ratdog:~ mike$ irb
> irb(main):001:0> x = 3
> => 3
> irb(main):002:0> Kernel.printf('%X', x)
> 3=> nil
> irb(main):003:0> 3.methods.include?('printf')
> => false
> irb(main):004:0> Kernel.methods.include?('printf')
> => true
>

And for a Fixnum printf is indeed private:

ratdog:~ mike$ irb
irb(main):001:0> 3.private_methods
=> ["select", "lambda", "local_variables", "chomp", "raise", "sub!",  
"Array", "print", "trap", "method_missing", "format", "exit!",  
"at_exit", "readlines", "set_trace_func", "autoload", "system",  
"getc", "initialize_copy", "split", "fail", "putc", "gsub!",  
"iterator?", "catch", "p", "remove_instance_variable", "sleep",  
"sub", "syscall", "callcc", "Integer", "fork", "srand",  
"irb_binding", "singleton_method_removed", "caller", "chop!", "puts",  
"scan", "autoload?", "binding", "block_given?", "throw", "warn", "`",  
"gsub", "loop", "Float", "open", "singleton_method_undefined",  
"rand", "exit", "chomp!", "gets", "trace_var", "load", "exec",  
"global_variables", "proc", "initialize", "chop", "printf", "String",  
"test", "sprintf", "abort", "readline", "untrace_var", "require",  
"eval"]


-- 

Mike Stok <mike@stok.ca>
http://www.stok.ca/~mike/

The "`Stok' disclaimers" apply.