21 lines
538 B
Text
21 lines
538 B
Text
runlengthEncode: function [s][
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join map chunk split s => [&] 'x ->
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(to :string size x) ++ first x
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]
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runlengthDecode: function [s][
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result: new ""
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loop (chunk split s 'x -> match? x {/\d+/}) [a,b] ->
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'result ++ repeat first b to :integer join to [:string] a
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return result
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]
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str: "WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW"
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encoded: runlengthEncode str
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print ["encoded:" encoded]
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decoded: runlengthDecode encoded
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print ["decoded:" decoded]
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if decoded=str -> print "\nSuccess!"
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