substrings.rb

# Implement a method #substrings that takes a word as the first argument and then
# an array of valid substrings (your dictionary) as the second argument.
# It should return a hash listing each substring (case insensitive) that was found
# in the original string and how many times it was found.
```
> substrings("Howdy partner, sit down! How's it going?", dictionary)
  => { "down" => 1, "how" => 2, "howdy" => 1,"go" => 1, "going" => 1, "it" => 2, "i" => 3, "own" => 1,"part" => 1,"partner" => 1,"sit" => 1 }
```

dictionary = ["below","down","go","going","horn","how","howdy","it","i","low","own","part","partner","sit"]

def substrings(phrase, dict)
    matches = Hash.new(0)
    word_list = phrase.split(' ')

    word_list.each do |word|
        dict.each do |w|
            if word.downcase.include?(w)
                matches[w] += 1
            end
        end
    end

    matches
end

puts substrings("below", dictionary)

puts substrings("Howdy partner, sit down! How's it going?", dictionary)