59 lines
1.2 KiB
Text
59 lines
1.2 KiB
Text
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# version 0.21.1
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def get_code(c : Char)
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case c
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when 'B', 'F', 'P', 'V'
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"1"
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when 'C', 'G', 'J', 'K', 'Q', 'S', 'X', 'Z'
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"2"
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when 'D', 'T'
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"3"
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when 'L'
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"4"
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when 'M', 'N'
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"5"
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when 'R'
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"6"
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when 'H', 'W'
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"-"
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else
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""
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end
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end
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def soundex(s : String)
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return "" if s == ""
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s = s.upcase
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result = s[0,1]
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prev = get_code s[0]
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s.lchop.each_char {|c|
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curr = get_code c
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result += curr if curr != "" && curr != "-" && curr != prev
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prev = curr unless curr == "-"
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}
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result.ljust(4, '0')[0, 4]
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end
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pairs = [
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["Ashcraft" , "A261"],
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["Ashcroft" , "A261"],
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["Gauss" , "G200"],
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["Ghosh" , "G200"],
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["Hilbert" , "H416"],
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["Heilbronn" , "H416"],
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["Lee" , "L000"],
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["Lloyd" , "L300"],
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["Moses" , "M220"],
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["Pfister" , "P236"],
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["Robert" , "R163"],
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["Rupert" , "R163"],
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["Rubin" , "R150"],
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["Tymczak" , "T522"],
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["Soundex" , "S532"],
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["Example" , "E251"]
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]
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pairs.each { |pair|
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puts "#{pair[0].ljust(9)} -> #{pair[1]} -> #{soundex(pair[0]) == pair[1]}"
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}
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