Kernel

Integer | 69

Integer core_ext/integer/even_odd.rb,core_ext/integer/inflections.rb

• Integer#multiple_of?(number),Integer#even?, andInteger#odd? test for divisibility.
  3.even? # => false
  3.odd? # => true
  3.multiple_of? 3 # => true


• Integer#ordinalize converts an integer to an ordinal number.
  puts (1..10).map {|i| i.ordinalize}.to_sentence

  >> 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, and 10th

  
  

Kernel

Daemonize core_ext/kernel/daemonizing.rb

Normally, when a process is attached to a console and that console exits, the program
terminates.Kernel#daemonizeis used to detach a Ruby process from the console, allowing it
to persist even if the console goes away. A typical daemon process will usedaemonizeas in
the following example:

server setup; process options

daemonize # detach from tty

loop do

# wait for request

# process request

end

SendingSIGTERM to a daemonized process kills it.

Reporting core_ext/kernel/reporting.rb

The top-level methods in this file control console messages that might be displayed.

• silence_warningsturns warnings off for the duration of the block.enable_warnings
  turns warnings on for the duration of the block.


• silence_stream(stream)silences the given stream (usuallySTDOUTorSTDERR) for the
  duration of the block.


• suppress(*exception_classes)ignores errors of the specified classes during the execu-
  tion of the block.