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Non-decimal radices/Convert: Difference between revisions
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→{{header|Ruby}}: did not provide method to convert from dec to base
m (→{{header|Ruby}}: newline before trans) |
m (→{{header|Ruby}}: did not provide method to convert from dec to base) |
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Line 785:
{{trans|Tcl}}
<lang ruby>
res = 0▼
▲ digits = %w{0 1 2 3 4 5 6 7 8 9 a b c d e f g h i j k l m n o p q r s t u v w x y z}
def baseconvert(str, basefrom, baseto)
str.to_s.downcase.each_char do |c|▼
dec2base(base2dec(str, basefrom), baseto)
idx = digits[0,base].find_index(c)▼
end
idx.nil? and raise ArgumentError, "invalid base-#{base} digit: #{c}"▼
res = res * base + idx▼
def base2dec(str, base)
raise ArgumentError, "base is invalid" unless base.between?(2, DIGITS.length)
▲ res = 0
▲ str.to_s.downcase.each_char do |c|
▲ idx.nil? and raise ArgumentError, "invalid base-#{base} digit: #{c}"
▲ res = res * base + idx
end
res▼
end
def dec2base(n, base)
return "0" if n == 0
raise ArgumentError, "base is invalid" unless base.between?(2, DIGITS.length)
res = []
while n > 0
n, r = n.divmod(base)
res.unshift(DIGITS[r])
end
res.join("")
end
▲ res
end
include BaseConvert
p baseconvert("107h", 23, 7) # => "50664"
</lang>
=={{header|Slate}}==
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