Module: PrintWrap

Defined in:
lib/print_wrap.rb

Overview

this module provides a simple way to print text before and after running a block of code in between. the purpose of this is to build CLI tools where you want to print something before starting a long-running step, and then print something when the long-running step is complete.

usage:

 > PrintWrap.print('Loading large file ...', ' DONE') do
 >   IO.read('/tmp/some_very_large_file.txt')
 > end
=> Loading large file ...           # right before the block starts running
=> Loading large file ... DONE      # when the block is complete

 > PrintWrap.print('Waiting ...', ' OK') do
 >   sleep 5
 > end
=> Waiting ...                      # before the sleep call
=> Waiting ... OK                   # when the sleep is over

Class Method Summary collapse

Class Method Details

before: String you want printed before the block runs after: String you want printed after the block runs



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# File 'lib/print_wrap.rb', line 21

def self.print(before, after)
  Kernel.print before     # necessary, otherwise the method will call itself
  block_result = yield if block_given?
  Kernel.puts after

  block_result
end