operator [] method
Implementation
operator [](int i) {
JrlLine line = preparedLines[i]; // get
//print("###### in line getter $line with ${line.valexp}");
vars.forEach((key, value)
{
print("replacing : #$key with $value");
line.desc = line.desc.replaceAll("#$key", "$value");
});
var evaled = eval(exp : line.valexp);
if(evaled is int && evaled >=0) line.valuta = evaled;
return line;
}