Module: StringCalculator

Defined in:
lib/string_calculator.rb,
lib/string_calculator/version.rb

Constant Summary collapse

VERSION = 
"0.1.0"

Instance Method Summary collapse

Instance Method Details

#array_sum ⇒ Object 



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# File 'lib/string_calculator.rb', line 23

def array_sum
 sum = 0
 digits.each { |x| sum+=x if x < 1001 }
 sum
end

#delimiter ⇒ Object 



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# File 'lib/string_calculator.rb', line 10

def delimiter
 ','
end

#digits ⇒ Object 



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# File 'lib/string_calculator.rb', line 14

def digits
 gsub(regular_expression,delimiter).split(delimiter).reject(&:empty?).map(&:to_i)
end

#manipulate ⇒ Object 



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# File 'lib/string_calculator.rb', line 4

def manipulate
 return 0 if empty?
 raise_if_negatives_present if include?("-")
 return array_sum
end

#raise_if_negatives_present ⇒ Object 



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# File 'lib/string_calculator.rb', line 18

def raise_if_negatives_present
 negativies = digits.select{|x| x < 0}
 raise "Negativies not allowed:#{negativies.join(',')}" if negativies.any?
end

#regular_expression ⇒ Object 



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# File 'lib/string_calculator.rb', line 29

def regular_expression
/[\n`~!@#$%^&*()_|+\=?;:'",.<>\{\}\[\]\\\/]/
end