I think I am going to take that route, thanks for the tip. <div class="gmail_quote">On Sat, Nov 17, 2012 at 6:36 AM, Matthias Felleisen <<a href="mailto:matthias@ccs.neu.edu" target="_blank">matthias@ccs.neu.edu</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><div> </div><div>You could just call lst with num as a parameter. Or you might be looking for define-syntax not define. Is that possible? </div> <div> </div> <div><div><div class="h5"><div>On Nov 17, 2012, at 1:05 AM, Monica Tomson wrote:</div> </div></div><blockquote type="cite"><div><div class="h5"><p style="clear:both;vertical-align:baseline;line-height:17.600000381469727px;font-size:13.600000381469727px;font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;margin:0px 0px 1em;word-wrap:break-word;border:0px;padding:0px"> Hi,<p style="clear:both;vertical-align:baseline;line-height:17.600000381469727px;font-size:13.600000381469727px;font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;margin:0px 0px 1em;word-wrap:break-word;border:0px;padding:0px"> I have an experiment for my project, basically, I need to embedded some s-expression into the code and make it run, like this, <pre style="margin-top:0px;margin-bottom:10px;padding:5px;border:0px;font-size:13.600000381469727px;vertical-align:baseline;background-color:rgb(238,238,238);font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif;overflow:auto;width:auto;max-height:600px;line-height:17.600000381469727px"> <code style="margin:0px;padding:0px;border:0px;font-size:13.600000381469727px;vertical-align:baseline;font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif">(define (test lst) (define num 1) (define l (list)) `@lst) ; oh, this is not the right way to go. (define lst `( (define num2 (add1 num)) (displayln num2)))</code></pre> <p style="clear:both;vertical-align:baseline;line-height:17.600000381469727px;font-size:13.600000381469727px;font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;margin:0px 0px 1em;word-wrap:break-word;border:0px;padding:0px"> I want the <code style="margin:0px;padding:1px 5px;border:0px;font-size:13.600000381469727px;vertical-align:baseline;background-color:rgb(238,238,238);font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif;background-repeat:initial initial">test</code> function be like after <code style="margin:0px;padding:1px 5px;border:0px;font-size:13.600000381469727px;vertical-align:baseline;background-color:rgb(238,238,238);font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif;background-repeat:initial initial">test(lst)</code> in racket code: <pre style="margin-top:0px;margin-bottom:10px;padding:5px;border:0px;font-size:13.600000381469727px;vertical-align:baseline;background-color:rgb(238,238,238);font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif;overflow:auto;width:auto;max-height:600px;line-height:17.600000381469727px"> <code style="margin:0px;padding:0px;border:0px;font-size:13.600000381469727px;vertical-align:baseline;font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif">(define (test lst) (define num 1) (define l (list)) (define num2 (add1 num) (displayln num2))</code></pre> <p style="clear:both;vertical-align:baseline;line-height:17.600000381469727px;font-size:13.600000381469727px;font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;margin:0px 0px 1em;word-wrap:break-word;border:0px;padding:0px"> How can I do this in racket?<p style="clear:both;vertical-align:baseline;line-height:17.600000381469727px;font-size:13.600000381469727px;font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;margin:0px 0px 1em;word-wrap:break-word;border:0px;padding:0px"> Thanks,<p style="clear:both;vertical-align:baseline;line-height:17.600000381469727px;font-size:13.600000381469727px;font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;margin:0px 0px 1em;word-wrap:break-word;border:0px;padding:0px"> --Monica</div></div> ____________________ Racket Users list: <a href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a> </blockquote></div> </div></blockquote></div>