12 lines
303 B
CoffeeScript
12 lines
303 B
CoffeeScript
encode = (str) ->
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str.replace /(.)\1*/g, (w) ->
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w[0] + w.length
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decode = (str) ->
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str.replace /(.)(\d+)/g, (m,w,n) ->
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new Array(+n+1).join(w)
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console.log s = "WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW"
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console.log encode s
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console.log decode encode s
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