Class: Cyberweb::Calculator

Inherits:
Base
  • Object
show all
Defined in:
lib/cyberweb/standalone_classes/calculator.rb

Overview

Cyberweb::Calculator

Constant Summary

Constants inherited from Base

Base::HOME_DIRECTORY_OF_THE_USER_X, Base::NAMESPACE

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#be_verbose, #be_verbose?, #cascading_style_sheets_directory?, #cd, #commandline_mode?, #copyright?, #css_comment, #delete_directory, #do_toggle, #e, #echo_raw, #filename?, #full_path_to_image_directory?, #html_colours?, #html_image, #htmlentities, #img_dir?, #infer_the_namespace, #initialize_the_configuration, #is_a_file?, #is_a_video_file?, #is_an_image_file?, #is_on_roebe?, #last_tag_used?, #last_tag_used_first_element?, #last_tag_used_id?, #mkdir, #mode?, #namespace?, #open_in_browser, #opne, #opnn, #remove_comments_from_this_string_but_preserve_CSS_rules, #remove_html, #return_all_directories, #return_date, #return_program_name, #return_pwd, #ruby_header?, #server_base_directory?, #set_commandline_mode, #set_last_tag_used, #update_the_image_directory, #use_this_relative_directory_for_custom_images?, #www_mode?

Methods included from BaseModule::FileRelatedFunctionality

#copy_this_file, #cpr, #delete_file, #filename_without_extension?, #read_file_via_utf8_encoding

Methods included from BaseModule

#attach_these_constants, #base_dir?, #beautiful_url, #cd, #create_the_internal_hash, #doctype?, #ee, #ensure_main_encoding, #esystem, #html_templates, #initialize_the_config_if_the_config_hash_is_empty, #internal_hash?, #log_dir?, #no_http, #random_alphabet_characters, #rarrow?, #rds, #remove_comments_from_this_string, #remove_numbers, #require_the_html_templates, #require_these, #return_file_size_in_kb_of, #return_html_comment, #ruby_sitelib_dir?, #sanitize_this_id, #server_base_directory?, #string_remote_image, #today?, #try_to_require_rack, #try_to_require_the_open_gem, #write_what_into

Methods included from BaseModule::ContentType

#content_type_is_html, #content_type_is_jpeg, #content_type_is_json, #content_type_is_plain_text

Methods included from BaseModule::CommandlineArguments

#append_to_the_commandline_arguments, #commandline_arguments?, #first_argument?, #parse_these_commandline_arguments, #second_argument?, #set_commandline_arguments

Methods included from BaseModule::Colours

#all_html_colours, #lightgreen, #rev, #sdir, #sfancy, #sfile, #simp, #steelblue, #tomato

Constructor Details

#initialize(commandline_arguments = nil, run_already = true, &block) ⇒ Calculator

#

initialize

#


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# File 'lib/cyberweb/standalone_classes/calculator.rb', line 23

def initialize(
    commandline_arguments = nil,
    run_already           = true,
    &block
  )
  reset
  set_work_on_this_input(
    commandline_arguments
  )
  # === Handle blocks given to this class next
  if block_given?
    yielded = yield
    case yielded
    # ===================================================================== #
    # === :report_the_result_on_the_commandline
    # ===================================================================== #
    when :report_the_result_on_the_commandline
      @report_result = true
    end
  end
  run if run_already
end

Class Method Details

.[](i = ARGV) ⇒ Object

#

Cyberweb::Calculator[]

#


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# File 'lib/cyberweb/standalone_classes/calculator.rb', line 127

def self.[](i = ARGV)
  new(i)
end

Instance Method Details

#report ⇒ Object

#

report

#


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# File 'lib/cyberweb/standalone_classes/calculator.rb', line 112

def report
  puts @result
end

#reset ⇒ Object

#

reset (reset tag)

#


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# File 'lib/cyberweb/standalone_classes/calculator.rb', line 49

def reset
  super()
  # ======================================================================= #
  # === @report_result
  # ======================================================================= #
  @report_result = false
end

#result? ⇒ Boolean

#

result?

#

Returns:

  • (Boolean) 


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# File 'lib/cyberweb/standalone_classes/calculator.rb', line 98

def result?
  @result
end

#run ⇒ Object

#

run (run tag)

#


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# File 'lib/cyberweb/standalone_classes/calculator.rb', line 119

def run
  silently_calculate_the_result
  report if @report_result
end

#sanitize_input ⇒ Object

#

sanitize_input

#


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# File 'lib/cyberweb/standalone_classes/calculator.rb', line 69

def sanitize_input
  @work_on_this_input.gsub!(/[A-Za-z]/,'')
  # ======================================================================= #
  # In the following case we may want a float. We will then try to sneak
  # in a ".0" part, to ensure that.
  # ======================================================================= #
  if @work_on_this_input.include?('/')
    try_to_find_this_index = @work_on_this_input.index(/\d\//)
    if try_to_find_this_index
      unless @work_on_this_input.include? '.0/'
        @work_on_this_input[try_to_find_this_index+1,0] = '.0'
      end
    end
  end
end

#set_work_on_this_input(i = '') ⇒ Object

#

set_work_on_this_input

#


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# File 'lib/cyberweb/standalone_classes/calculator.rb', line 60

def set_work_on_this_input(i = '')
  i = [i].flatten.compact.first
  @work_on_this_input = i.dup
  sanitize_input
end

#silently_calculate_the_result ⇒ Object

#

silently_calculate_the_result

This method will silently calculate the result. Another method can be used to report said result, e. g. on the commandline.

#


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# File 'lib/cyberweb/standalone_classes/calculator.rb', line 91

def silently_calculate_the_result
  @result = eval(input?)
end

#work_on_this_input? ⇒ Boolean Also known as: input?

#

work_on_this_input?

#

Returns:

  • (Boolean) 


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# File 'lib/cyberweb/standalone_classes/calculator.rb', line 105

def work_on_this_input?
  @work_on_this_input
end