Step by Step solution about How to resolve the algorithm Anagrams step by step in the Ruby programming language

Source Code Explanation:

Version 1

1. Hash Initialization:

   anagram = Hash.new {|hash, key| hash[key] = []}

   This initializes a Hash that creates an empty array for each unique key. It will be used to group words by their sorted characters, creating anagram groups.

2. Reading the Word List:

   URI.open('http://wiki.puzzlers.org/pub/wordlists/unixdict.txt') do |f|
    words = f.read.split
   end

   This opens a URI and reads the contents of the Unix dictionary file into an array of words.

3. Creating Anagram Groups:

   for word in words
    anagram[word.split('').sort] << word
   end

   For each word, it sorts the characters and adds the word to the corresponding array in the anagram Hash. This effectively groups anagrams together.

4. Finding the Maximum Group Size:

   count = anagram.values.map {|ana| ana.length}.max

   This finds the maximum number of anagrams in any group.

5. Printing Anagram Groups with the Maximum Size:

   anagram.each_value do |ana|
    if ana.length >= count
      p ana
    end
   end

   This iterates over the anagram groups and prints any group with a size greater than or equal to the maximum size found in the previous step.

Version 2

This version utilizes Ruby's powerful grouping features and lambda syntax.

1. Loading the Word List:

   anagrams = open('http://wiki.puzzlers.org/pub/wordlists/unixdict.txt'){|f| f.read.split.group_by{|w| w.each_char.sort} }

   It loads the word list and groups the words by their sorted characters using the group_by method, creating a Hash of anagram groups.

2. Finding the Largest Group Size:

   anagrams.values.group_by(&:size).max.last

   This finds the group with the maximum group size by grouping the groups by their size and finding the largest group.

3. Printing Anagram Groups with the Maximum Size:

   anagrams.values.group_by(&:size).max.last.each{|group| puts group.join(", ") }

   This iterates over the largest anagram groups and prints each group as a comma-separated string.

Main Differences:

• Version 1 uses a manual loop to create and populate the anagram groups, while Version 2 leverages Ruby's built-in grouping capabilities.
• Version 1 explicitly finds the maximum group size, while Version 2 uses a combination of grouping and max functions to find the largest group.

require 'open-uri'

anagram = Hash.new {|hash, key| hash[key] = []} # map sorted chars to anagrams

URI.open('http://wiki.puzzlers.org/pub/wordlists/unixdict.txt') do |f|
  words = f.read.split
  for word in words
    anagram[word.split('').sort] << word
  end
end

count = anagram.values.map {|ana| ana.length}.max
anagram.each_value do |ana|
  if ana.length >= count
    p ana
  end
end


require 'open-uri'

anagrams = open('http://wiki.puzzlers.org/pub/wordlists/unixdict.txt'){|f| f.read.split.group_by{|w| w.each_char.sort} }
anagrams.values.group_by(&:size).max.last.each{|group| puts group.join(", ") }