Words

A simple program to generate sequences and words from a dictionary

Prerequisites

ruby >= 2.0

Usage

Direct from console

Given a custom file name

ruby ./dictionary_writer.rb <filename>

To use the default dictionary.txt

ruby ./dictionary_writer.rb

Used as a library

require 'dictonary.rb'

dictionary = Dictionary.new(['arrows', 'carrot', 'give', 'me', 'Rowsy', 'U.S.A.F'])

dictionary.sequences #=> ['rrow', 'carr', 'rrot', 'give', 'owsy', 'usaf']
dictionary.words #=> ['arrows', 'carrot', 'carrot', 'give', 'Rowsy', 'U.S.A.F']

Output

dictionar_writer.rb outputs two files:

sequences.txt - contains all unique 4-letter sequences from the given file
words.txt - contains all the words that have unique 4-letter sequences, following the sequence of the phrases from sequences.txt

Assumptions

The 4-letter sequences are chosen with the following assumptions:

Uppercase and downcase letters counts as the same
Only alphabet letters are counted (i.e. ‘ and . are not counted)

Decisions

No tests are added for dictionary_writer.rb since it’s a simple procedural program that reads from a file and outputs two files. Testing it would only be testing ruby’s capability to read/write files and not necessarily any logic related to the problem. All logic for creating sequences and words are in dictionary_spec.rb.
This solution priortized reusability/readability over speed. If we need to account for speed, we will need to read and consume the words in the file line by line instead of all at once using the Dictionary class.

adimasuhid/words