formateDollar function
Implementation
String formateDollar(double m,{bool addSign=true}){
String mStr=m.toStringAsFixed(2);
String rs=mStr.substring(mStr.length-3);
mStr=mStr.substring(0,mStr.length-3);
while(mStr.length>3){
rs=","+mStr.substring(mStr.length-3)+rs;
mStr=mStr.substring(0,mStr.length-3);
}
rs=addSign?("\$ "+mStr+rs):(mStr+rs);
return rs;
}