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<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'>That is just the instantiate syntax, <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'><a
href="http://docs.racket-lang.org/reference/objcreation.html?q=instantiate#(form._((lib._racket/private/class-internal..rkt)._instantiate))">http://docs.racket-lang.org/reference/objcreation.html?q=instantiate#(form._((lib._racket/private/class-internal..rkt)._instantiate))</a>
<o:p></o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> users-bounces@racket-lang.org [mailto:users-bounces@racket-lang.org]
<b>On Behalf Of </b>kty1104@gmail.com<br>
<b>Sent:</b> dinsdag 26 oktober 2010 9:12<br>
<b>To:</b> users@racket-lang.org<br>
<b>Subject:</b> [racket] there must be function right after parenthesis?<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>there must be function right after parenthesis?<br>
hello~<br>
while I am learning GUI programming in DrRacket,<br>
I don't get how string literal can be placed right after parenthesis<br>
such as <br>
(define frame (instantiate frame% ("Example")))<br>
(define msg (instantiate message% ("No events so far..." frame)))<br>
(instantiate button% ("Pause" frame (lambda (button event) (sleep
5))))<br>
(instantiate button% ("Ok" panel void))<br>
I was thought one of the scheme grammar is there must be a function right after
parenthesis<br>
and I don't understand how such a code like<br>
((func arg) arg2) works too.<br>
<br>
could somebody please let me know how it works?<br>
thanks in advanced<o:p></o:p></p>
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