How to suppress Rails console/irb outputs

You can append ; nil to your statements.

Example:

users = User.all; nil

irb prints the return value of the last executed statement; thus in this case it'll print only nil since nil is the last executed valid statement.

In search of a solution how to silence the irb/console output, I also found an answer at austinruby.com:

silence irb:

conf.return_format = ""

default output:

conf.return_format = "=> %s\n"

limit to eg 512 chars:

conf.return_format = "=> limited output\n %.512s\n"

Here, add this to your ~/.irbrc:

require 'ctx'require 'awesome_print'module IRB  class Irb        ctx :ap do      def output_value()        ap(@context.last_value)      end    end    ctx :puts do      def output_value()        puts(@context.last_value)      end    end    ctx :p do      def output_value()        p(@context.last_value)      end    end    ctx :quiet do      def output_value()      end    end  endenddef irb_mode(mode)  ctx(mode) { irb }end

(Note: You must install the ctx gem first, though awesome_print is optional, of course.)

Now when you are on any console that uses irb, you can do the following:

Normal mode:

irb(main):001:0> { this:'is a complex object', that:[ { will:'probably'}, { be:'good to read' } ], in:{ some:{ formatted:'way'} } }=> {:this=>"is a complex object", :that=>[{:will=>"probably"}, {:be=>"good to read"}], :in=>{:some=>{:formatted=>"way"}}}

...yep, just what you expect.

awesome_print mode:

irb(main):002:0> irb_mode(:ap)irb#1(main):001:0> { this:'is a complex object', that:[ { will:'probably'}, { be:'good to read' } ], in:{ some:{ formatted:'way'} } }=> {    :this => "is a complex object",    :that => [        [0] {            :will => "probably"        },        [1] {            :be => "good to read"        }    ],      :in => {        :some => {            :formatted => "way"        }    }}

...wow, now everything is printing out awesomely! :)

Quiet mode:

irb#1(main):002:0> irb_mode(:quiet)irb#1(main):001:0> { this:'is a complex object', that:[ { will:'probably'}, { be:'good to read' } ], in:{ some:{ formatted:'way'} } }irb#1(main):002:0>

... whoah, no output at all? Nice.

Anyways, you can add whatever mode you like, and when you're finished with that mode, just exit out or it, and you'll be back in the previous mode.

Hope that was helpful! :)