Question

How can I capitalize certain letters in a string to make it so that only designated words are capitalized.

Must Past These Test:
“barack obama” == “Barack Obama”
&
“the catcher in the rye” == “The Catcher in the Rye”

So far I have a method that will capitalize all words:

#Capitalizes the first title of every word.
def capitalize(words)
     words.split(" ").map {|words| words.capitalize}.join(" ")
end

What are the most efficient next steps I could take to arrive at a solution? Thanks!

Answer 1

You could create a list of the word you don’t want to capitalize and do

excluded_words = %w(the and in) #etc

def capitalize_all(sentence, excluded_words)
  sentence.gsub(/\w+/) do |word|
    excluded_words.include?(word) ? word : word.capitalize
  end
end

By the way, if you were using Rails and did not need to exclude specific words you could use titleize.

"the catcher in the rye".titleize
#=> "The Catcher In The Rye"