Adding a zero to single digit variable

for i in 0{1..9} {10..20}  ; do  echo $i  ; done

http://stackoverflow.com/questions/5099119/adding-a-zero-to-single-digit-variable

PASCAL 的 REGEX

uses RegExpr;


  procedure myregex()
var
  savePath: string;
const
  Template = '.*/(.*$)?';

 with TRegExpr.Create do try
      Expression := Template;
      if Exec (trim(EDITURL.Text)) then
        begin
          viaHttpVBS := Match[1] ;
          //showmessage(viaHttpVBS);
        end;
      finally  Free;
      end;        

END;