RosettaCodeData/Task/Look-and-say-sequence/Sidef/look-and-say-sequence.sidef

func lookandsay(str) {
    str.gsub(/((.)\2*)/, {|a,b| a.len.to_s + b });
}

var num = "1";
{
  say num;
  num = lookandsay(num);
} * 10;