CODEWITHSUNDEEP
ruby
jta
jta

Reputation: 15

Ruby - Iterating over String that iterates over array

I want to count vowels in Ruby. The code I have come up with, and it works for one word is: 

def count_vowels(string)
  vowel = 0
  i = 0

  while i < string.length
    if (string[i]=="a" || string[i]=="e" || string[i]=="i" || string[i]=="o"|| string[i]=="u")
      vowel +=1
    end
  i +=1
  end
  return vowel
end

My question is this: If I have a list of words, rather than a single one, how do I iterate over the list of words to count the vowels in each word? Would it be something like this?

for each string_in list count_vowels

Upvotes: 0

Views: 159

Answers (3)

potashin
potashin

Reputation: 44581

You can use .count:

string.downcase.count('aeiou')

If you have a list of words, you can do the following:

def count_vowels(string)
   string.downcase.count('aeiou')
end

list_of_words.map { |word|
   { word =>  count_vowels(word) }
}

Example

Upvotes: 0

anon
anon

Reputation:

This is fairly simple. If you have the list of words as an array, you can just do this:

vowel_count = 0;
words.each { |word| vowel_count += count_vowels word }

Now, vowel_count has the amount of vowels in every word.

You could also do something like this, if you want an array of each count of vowels:

vowel_counts = words.map { |word| count_vowels word }

Upvotes: 0

Logan Serman
Logan Serman

Reputation: 29870

First of all, to count vowels it's as easy as using the count method:

string.downcase.count('aeiou')

If you have an array of strings, you can use each to iterate over them. You can also use map, which iterates over the collection and maps each result to an array.

['abc', 'def'].map do |string|
  { string => string.downcase.count('aeiou') }
end

This will return an array of hashes, with the keys being the strings and the values being the number of vowels.

Upvotes: 2

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