CODEWITHSUNDEEP
ruby-on-railsruby
McBilly
McBilly

Reputation: 3

How to set an IF statement comparing to values inside an array? (Ruby)

Is it possible to set a conditional statement (IF statement) comparing a variable against a variable that iterates through the values inside an array? I was looking for something like:

array_of_small_words = ["and","or","be","the","of","to","in"]
if word == array_of_small_words.each 
   # do thing
else
   # do another thing
end

Basically, I want to capitalize each word but don't want to do it for "small words". I know I could do the the opposite and iterate through the array first and then compare each iteration with the word but I was hoping there would be a more efficient way.

sentence = ["this","is","a","sample","of","a","title"]
array_of_small_words = ["and","or","be","the","of","to","in"]
sentence.each do |word|
    array_of_small_words.each do |small_words|
       if word == small_words
          # don't capitalize word
       else
          # capitalize word
       end
    end
end

I'm not really sure if this is possible or if there is a better way of doing this?

Thank you!

Upvotes: 0

Views: 189

Answers (3)

Cary Swoveland
Cary Swoveland

Reputation: 110665

This should be faster than @mudasobwa's repeated use of include? if packaged in a method and used frequency. It would not be faster, however, if mudsie used a set lookup (a minor change, of which he is well-aware), as I mentioned in a comment. If efficiency is important, I'd prefer mudsie's way with the set mod over my answer. In a way I was just playing around below.

I've assumed he small words are and, or, be, the, of, to, in and notwithstanding.

SMALL_WORDS = %w| and or be the of to in notwithstanding |
  #=> ["and", "or", "be", "the", "of", "to", "in", "notwithstanding"] 
(SMALL_WORDS_HASH = SMALL_WORDS.map { |w| [w.upcase, w] }.to_h).
  default_proc = proc { |h,k| h[k]=k }

Test:

SMALL_WORDS_HASH
  #=> {"AND"=>"and", "OR"=>"or", "BE"=>"be", "THE"=>"the", "OF"=>"of",
  #    "TO"=>"to", "IN"=>"in", "NOTWITHSTANDING"=>"notwithstanding"} 
SMALL_WORDS_HASH["TO"]
  #=> "of" 
SMALL_WORDS_HASH["HIPPO"]
  #=> "HIPPO" 

def convert(arr)
  arr.join(' ').upcase.gsub(/\w+/, SMALL_WORDS_HASH)
end

convert ["this","is","a","sample","of","a","title"]
  #=> "THIS IS A SAMPLE of A TITLE"

Upvotes: 0

Aleksei Matiushkin
Aleksei Matiushkin

Reputation: 121000

sentence = ["this","is","a","sample","of","a","title"]
array_of_small_words = ["and","or","be","the","of","to","in"]

sentence.map do |word|
  array_of_small_words.include?(word) ? word : word.upcase
end
#⇒ ["THIS", "IS", "A", "SAMPLE", "of", "A", "TITLE"]

Upvotes: 1

philomory
philomory

Reputation: 1767

What you're looking for is if array_of_small_words.include?(word).

Upvotes: 0

Related Questions