ruby - Number of repeats -


write method takes in string , returns number of letters appear more once in string. may assume string contains lowercase letters. count number of letters repeat, not number of times repeat in string.

i implemented methods , test cases as:

def num_repeats(string)   count = 0   dix = 0   new = ""   while dix < string.length     letter = string[dix]     if !(new.include?(letter))       new = new + "letter"     else       break     end     dix2 = dix + 1     while dix2 < string.length       if letter == string[dix2]         count +=1         break       end       dix2 +=1     end     dix += 1   end      puts(count.to_s)   return count   end  # these tests check code working. after writing # solution, should print true.  puts('num_repeats("abdbc") == 1: ' + (num_repeats('abdbc') == 1).to_s) # 1 character repeated puts('num_repeats("aaa") == 1: ' + (num_repeats('aaa') == 1).to_s) puts('num_repeats("abab") == 2: ' + (num_repeats('abab') == 2).to_s) puts('num_repeats("cadac") == 2: ' + (num_repeats('cadac') == 2).to_s) puts('num_repeats("abcde") == 0: ' + (num_repeats('abcde') == 0).to_s)

test results:

1                                                                                                                                                                                       num_repeats("abdbc") == 1: true                                                                                                                                                         2                                                                                                                                                                                       num_repeats("aaa") == 1: false                                                                                                                                                          2                                                                                                                                                                                       num_repeats("abab") == 2: true                                                                                                                                                          2                                                                                                                                                                                       num_repeats("cadac") == 2: true                                                                                                                                                         0                                                                                                                                                                                       num_repeats("abcde") == 0: true

for second test returned false, wrong code?

you appending "letter", rather letter variable new on line 8.

if !(new.include?(letter))   new = new + "letter" else   #... end

becomes:

unless new.include?(letter)   new = new + letter else   #... end

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