sidef/scripts/RosettaCode/word_wrap.sf

#!/usr/bin/ruby

#
## https://rosettacode.org/wiki/Word_wrap
#

class String {
    method wrap(width) {
        var txt = self.gsub(/\s+/, " ");
        var len = txt.len;
        var para = [];
        var i = 0;
        while (i < len) {
            var j = (i + width);
            while ((j < len) && (txt.char_at(j) != ' ')) { --j };
            para.append(txt.substr(i, j-i));
            i = j+1;
        };
        return para.join("\n");
    }
}

var text = 'aaa bb cc ddddd';
say text.wrap(6);