Converting upper-case string into title-case using Ruby

Question

I\'m trying to convert an all-uppercase string in Ruby into a lower case one, but with each word\'s first character being upper case. Example:

convert \"MY STRING HE

Answer 1

"MY STRING HERE".titlecase

Does the job (it's a method in the Rails gem, however) http://apidock.com/rails/String/titlecase

Answer 2

Unicode-aware titlecase for Ruby 2.4.0+:

class String
  def titlecase
    split(/([[:alpha:]]+)/).map(&:capitalize).join
  end
end

>> "я только что посмотрел \"леди исчезает\", и это чума!".titlecase
=> "Я Только Что Посмотрел \"Леди Исчезает\", И Это Чума!"

(based on https://stackoverflow.com/a/1792102/788700)

Answer 3

string = "MY STRING HERE"
string.split(" ").map {|word| word.capitalize}.join(" ")

The way this works: The .split(" ") splits it on spaces, so now we have an array that looks like ["my", "string", "here"]. The map call iterates over each element of the array, assigning it to temporary variable word, which we then call capitalize on. Now we have an array that looks like ["My", "String", "Here"], and finally we turn that array back into a string by joining each element with a space (" ").

Answer 4

Capitalizes every word in a sentence using ruby, without regex.. because unfortunately those scare me

class Book
    attr_accessor :title
    def title=(new_title)
        result = []
        words = new_title.split(' ')
        words.each do |word|
            capitalized = word[0].upcase + word[1..word.length].downcase
            result.push(capitalized)
        end

        @title = result.join(' ')
    end
end