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duplicate_chars.rb
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duplicate_chars.rb
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# Create a program that will take in a string as input and, if there are duplicates of more than two alphabetical characters in the string, returns the string with all the extra characters in a bracket.
# For example, the input "aaaabbcdefffffffg" should return "aa[aa]bbcdeff[fffff]g"
# Please also ensure that the input is a string, and return "Please enter a valid string" if it is not.
# - - - - - - - - My Answer - - - - - - - -
def string_parse string
return 'Please enter a valid string' unless string.is_a? String
new_arr = []
answer = ''
chars = string.split('')
chars.map do |char|
if (new_arr[-1].is_a? Array) && (new_arr[-1][0] == char)
new_arr[-1] << char
elsif (new_arr[-1] == char) && (new_arr[-2] == char)
new_arr << [char]
else
new_arr << char
end
end
new_arr.map { |el| (el.is_a? Array) ? answer << "[" + el.join + "]" : answer << el }
answer
end
string_parse('aaaabbcdefffffffg')
# First, create an empty array and an empty string.
# Secondly check to see if the submission is, in fact, a string, if not, return an error message.
# If it is a string, split it into individual chars
# If the last char is an array && the value stored in that array equal the current char, push it into the array.
# Else if the last two non-array elements both equal the current char, push char in as an array.
# Finally, if none of the above works, add the char to the end of the array.
# Of that created array, ‘.map’ it.
# If the element is just a char, push it into the string
# If the element is an array, ‘.join’ it into a string and add brackets.
# Finally, return the answer string
# - - - - - - - - - alt - - - - - - - -
# use of ‘.gsub’ and regEx is how to make this beautiful.wow.
# def string_parse_2 string
# string.gsub /(.)\1(\1+)/, '\1\1[\2]' rescue 'Please enter a valid string'
# end