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Ingy döt Net 2013-04-11 01:07:29 -07:00
parent b83f433714
commit 68f8f3e56b
14735 changed files with 178959 additions and 0 deletions
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Task/Vigen-re-cipher/Mathematica/vigen-re-cipher.math Normal file
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encode[text_String, key_String] :=
Module[{textCode, keyCode},
textCode =
Cases[ToCharacterCode[
ToUpperCase@
text], _?(IntervalMemberQ[Interval@{65, 90}, #] &)] - 65;
keyCode =
Cases[ToCharacterCode[
ToUpperCase@
key], _?(IntervalMemberQ[Interval@{65, 90}, #] &)] - 65;
keyCode =
If[Length[textCode] < Length[keyCode],
keyCode[[;; Length@textCode]],
PadRight[keyCode, Length@textCode, keyCode]];
FromCharacterCode[Mod[textCode + keyCode, 26] + 65]]
decode[text_String, key_String] :=
Module[{textCode, keyCode},
textCode =
Cases[ToCharacterCode[
ToUpperCase@
text], _?(IntervalMemberQ[Interval@{65, 90}, #] &)] - 65;
keyCode =
Cases[ToCharacterCode[
ToUpperCase@
key], _?(IntervalMemberQ[Interval@{65, 90}, #] &)] - 65;
keyCode =
If[Length[textCode] < Length[keyCode],
keyCode[[;; Length@textCode]],
PadRight[keyCode, Length@textCode, keyCode]];
FromCharacterCode[Mod[textCode - keyCode, 26] + 65]]