27 lines
455 B
Ruby
27 lines
455 B
Ruby
# Nucleotide class
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class Nucleotide
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attr_accessor :histogram
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def initialize(strand)
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@strand = strand
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@histogram = { 'A' => 0, 'T' => 0, 'C' => 0, 'G' => 0 }
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count_all
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end
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def self.from_dna(strand)
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raise ArgumentError if strand =~ /[^ATCG]/
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new(strand)
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end
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def count(nucleotide)
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@histogram[nucleotide]
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end
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private
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def count_all
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@histogram.each { |n, _| @histogram[n] = @strand.chars.count(n) }
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end
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end
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