IRB output format in YAML

Ruby
1

I there a way to configure IRB so that it always display the result of a
IRB command in YAML or PP format.

Example:

In YAML:

irb(main):011:0> ENV.keys

  • ALLUSERSPROFILE
  • APPDATA
  • APR_ICONV_PATH
  • ATI_PATH
  • BERK_PATH
  • CLASSPATH
  • CLIENTNAME

Pretty print:

irb(main):015:0> ENV.key
[“ALLUSERSPROFILE”,
“APPDATA”,
“APR_ICONV_PATH”,
“THG_ICON_PATH”,
“WINDOWS_PATH”]

2

Martin M. wrote:

I there a way to configure IRB so that it always display the result of a
IRB command in YAML or PP format.

Put this in your .irbrc and play around a little:

require ‘yaml’

class IRB::Irb
def output_value
if @context.inspect?
printf @context.return_format, @context.last_value.to_yaml
else
printf @context.return_format, @context.last_value
end
end
end

3

Thanks Joel, it works perfectly.

Martinos