Run-length encoding: Difference between revisions
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(→{{header|C}}: semi serious method) |
(→{{header|Euphoria}}: Euphoria example added) |
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?_assert(decode(encode(PreEncoded)) =:= PreEncoded) |
?_assert(decode(encode(PreEncoded)) =:= PreEncoded) |
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].</lang> |
].</lang> |
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=={{header|Euphoria}}== |
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<lang euphoria>include misc.e |
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function encode(sequence s) |
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sequence out |
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integer prev_char,count |
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if length(s) = 0 then |
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return {} |
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end if |
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out = {} |
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prev_char = s[1] |
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count = 1 |
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for i = 2 to length(s) do |
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if s[i] != prev_char then |
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out &= {count,prev_char} |
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prev_char = s[i] |
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count = 1 |
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else |
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count += 1 |
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end if |
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end for |
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out &= {count,prev_char} |
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return out |
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end function |
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function decode(sequence s) |
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sequence out |
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out = {} |
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for i = 1 to length(s) by 2 do |
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out &= repeat(s[i+1],s[i]) |
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end for |
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return out |
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end function |
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sequence s |
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s = encode("WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW") |
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pretty_print(1,s,{3}) |
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puts(1,'\n') |
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puts(1,decode(s))</lang> |
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Output: |
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<pre>{12,'W',1,'B',12,'W',3,'B',24,'W',1,'B',14,'W'} |
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WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW</pre> |
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=={{header|F Sharp|F#}}== |
=={{header|F Sharp|F#}}== |
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