Module: NRSER::Rash::Formatters

Defined in:
lib/nrser/rash/formatters.rb

Overview

these are functions mapping an Object to a String for printing. their names can be used as values for Object.rash_formatter to indicate Rash should use that function to print the object.

Class Method Summary collapse

Class Method Details

.json(obj) ⇒ Object 



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# File 'lib/nrser/rash/formatters.rb', line 87

def self.json(obj)
  require 'json'
  JSON.dump(obj)
end

.json_pp(obj) ⇒ Object 



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# File 'lib/nrser/rash/formatters.rb', line 92

def self.json_pp(obj)
  require 'json'
  JSON.pretty_generate(obj)
end

.kv(hash) ⇒ Object

print a white-space formatted key/value table given a hash. keys and values are printed cast to strings, and nested hashes are treated as sub-keys:

NRSER::Rash::Formatters.kv({
  :scheme     => "https",
  :host       => "www.google.com",
  :port       => 443,
  :params => {
    :q        => "blah",
    :oq       => "blah",
    :aqs      => "chrome.0.57j60l4j59.468",
    :sourceid => "chrome",
    :ie       => "UTF-8"
  },
  :fragment   => nil
})

scheme:      https
host:        www.google.com
port:        443
params:
  q:         blah
  oq:        blah
  aqs:       chrome.0.57j60l4j59.468
  sourceid:  chrome
  ie:        UTF-8
fragment:



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# File 'lib/nrser/rash/formatters.rb', line 53

def self.kv(hash)
  find_width = lambda do |hash, indent|
    width = 0
    hash.each do |key, value|
      this_width = if value.is_a? Hash
        find_width.call(value, indent + 2)
      else
        key.to_s.length + indent
      end
      if this_width > width
        width = this_width
      end
    end
    width
  end
  width = find_width.call(hash, 0)
  out = ''
  write_out = lambda do |hash, indent|
    hash.each do |key, value|
      out << ' ' * indent \
          << "#{ key }:  " \
          << ' ' * (width - key.to_s.length - indent)
      if value.is_a? Hash
        out << "\n"
        write_out.call(value, indent + 2)
      else
        out << "#{ value }\n"
      end
    end
  end
  write_out.call(hash, 0)
  out
end

.lines(obj) ⇒ Object 



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# File 'lib/nrser/rash/formatters.rb', line 105

def self.lines obj
  obj.join "\n"
end

.pp(obj) ⇒ Object 



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# File 'lib/nrser/rash/formatters.rb', line 97

def self.pp(obj)
  require 'pp'
  require 'stringio'
  sio = StringIO.new
  PP.pp(obj, sio)
  sio.string
end

.yaml(obj) ⇒ Object 



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# File 'lib/nrser/rash/formatters.rb', line 19

def self.yaml(obj)
  require 'yaml'
  YAML.dump(obj)
end