colorize and regular expressions

ruby-2.7.1p83

colorize

You can use colorize to color the characters output by the terminal.

For example

require 'colorize'

def assert_equal(expected, result)
  if expected == result
    puts 'true'.cyan
  else
    puts 'false'.magenta
  end
end

assert_equal(1, 1)

Then, true is displayed in cyan and false is displayed in magenta.

Regular expression

Rubular (http://rubular.com) is a Ruby-based regular expression editor. You can try it as a test when writing a regular expression.

For example, as test string

Hello world!

In the regular expression part

\s(.+)

If you enter

world!

Only can be extracted.

I found it convenient to be able to check before actually writing in the program.


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