RosettaCodeData/Task/Run-length-encoding/Sidef/run-length-encoding-2.sidef

func encode(str) {
    str.gsub(/(.)(\1{0,254})/, {|a,b| b.len+1 -> chr + a});
}

func decode(str) {
     var chars = str.chars;
     var r = '';
     (chars.len/2 -> int).range.each { |i|
         r += (chars[2*i + 1] * chars[2*i].ord);
     }
     return r;
}