40 lines
549 B
Ruby
40 lines
549 B
Ruby
class Sensitive
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alias_method :eql?, :==
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alias_method :equal?, :==
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def initialize(v, ch: "*", head: 2, tail: 2)
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@v = v
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@ch = ch
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@head = head
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@tail = tail
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end
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def mask(v)
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String.new.concat(v[0, @head], @ch * (v.length - (@head + @tail)), v[-@tail, @tail])
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end
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def unwrap
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@v
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end
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def length
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@v.length
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end
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def to_s
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mask @v
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end
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def inspect
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"#<#{self.class.name} @v=#{wrap}>"
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end
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def hash
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@v.hash
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end
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def ==(other)
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other.is_a?(Sensitive) && other.hash == hash
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end
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end
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