logo Use CA10RAM to get 10%* Discount.
Order Nowlogo
(5/5)

project involves adding a method reach to all objects.

INSTRUCTIONS TO CANDIDATES
ANSWER ALL QUESTIONS

In Ruby, all classes are derived from class object. Since methods can be added to classes at any time, it is possible to re-open object and add methods, which then belong to every object.

This project involves adding a method reach to all objects. The reach method is like the standard each method, except that it applies to the leaves of container objects. The each method operates on each member of the container, but reach operates recursively, entering members which are also containers and iterating through their contents. For our purposes, an object is just a container if it has an each method. For instance,

irb (main):001:0> load("reach2.rb")

=> true

irb (main):002:0> [4, 9, "fred", 11].each { |x| print x, "\n"

4

9

fred 11

=> [4, 9, "fred", 11]

irb (main):003:0> [4, 9, "fred", 11].reach { |x| print x, "\n"

4

9

fred

11

=> [4, 9,

"fred", 11]

irb (main):004:0> [4, [ "ding", "bat"] "fred", [1, 2, 3]].ea

4

["ding", "bat"]

fred

[1, 2, 3]

=> [4, ["ding", "bat"], "fred", [1, 2, 3]]

irb (main):005:0> [4, [ "ding", "bat"], "fred", [1, 2, 3]].re

4

ding

bat

fred

1

2

3

|=> [4, ["ding", "bat"], "fred", [1, 2, 3]]

irb (main): 006:0> 17.each { |x| print x, "\n" } NoMethodError: undefined method `each' for 17: Fixnum from (irb):6

from /usr/bin/irb:11:in `'

irb (main): 007:0> 17. reach { |x| print x, "\n" }

17

=> 17

irb (main): 008:0> { "mike" => 17, "bill" => 3, "sally" => 25, ["mike", 17]

["bill", 3] ["sally", 25]

["alex", 9]

|=> { "mike"=>17, "bill"=>3, "sally"=>25, "alex"=>9}

irb (main): 009:0> { "mike" => 17, "bill" => 3, "sally" => 25, mike

17

bill

3

sally

25 alex 9

|=> { "mike"=>17, "bill"=>3, 'sally"=>25,

"alex"=>9}

 

(5/5)
Attachments:

Related Questions

. Introgramming & Unix Fall 2018, CRN 44882, Oakland University Homework Assignment 6 - Using Arrays and Functions in C

DescriptionIn this final assignment, the students will demonstrate their ability to apply two ma

. The standard path finding involves finding the (shortest) path from an origin to a destination, typically on a map. This is an

Path finding involves finding a path from A to B. Typically we want the path to have certain properties,such as being the shortest or to avoid going t

. Develop a program to emulate a purchase transaction at a retail store. This program will have two classes, a LineItem class and a Transaction class. The LineItem class will represent an individual

Develop a program to emulate a purchase transaction at a retail store. Thisprogram will have two classes, a LineItem class and a Transaction class. Th

. SeaPort Project series For this set of projects for the course, we wish to simulate some of the aspects of a number of Sea Ports. Here are the classes and their instance variables we wish to define:

1 Project 1 Introduction - the SeaPort Project series For this set of projects for the course, we wish to simulate some of the aspects of a number of

. Project 2 Introduction - the SeaPort Project series For this set of projects for the course, we wish to simulate some of the aspects of a number of Sea Ports. Here are the classes and their instance variables we wish to define:

1 Project 2 Introduction - the SeaPort Project series For this set of projects for the course, we wish to simulate some of the aspects of a number of

Ask This Question To Be Solved By Our ExpertsGet A+ Grade Solution Guaranteed

expert
Atharva PatilComputer science

867 Answers

Hire Me
expert
Chrisantus MakokhaComputer science

708 Answers

Hire Me
expert
AyooluwaEducation

564 Answers

Hire Me
expert
RIZWANAMathematics

794 Answers

Hire Me

Get Free Quote!

338 Experts Online