<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
Thanks for the insights!<br>
I'm glad that Racket users can afford the luxury of understanding
these things <i>in principle</i> while using included batteries in
the real world. :)<br>
<br>
<br>
<div class="moz-cite-prefix">On 15.04.14 20:46, Matthias Felleisen
wrote:<br>
</div>
<blockquote
cite="mid:F484A7AE-7329-4E91-8297-3554CF3B34E0@ccs.neu.edu"
type="cite">
<pre wrap="">
On Apr 14, 2014, at 4:20 PM, Philipp Dikmann <a class="moz-txt-link-rfc2396E" href="mailto:philipp@dikmann.de"><philipp@dikmann.de></a> wrote:
For the general question, see Ian's response.
</pre>
<blockquote type="cite">
<pre wrap="">I'm currently trying to grok streams as explained in SICP. Their implementation relies on the delayed (and optimized) evaluation of a streams cdr. This is readily achieved using simple lambda-wrapping macros.
</pre>
</blockquote>
<pre wrap="">
This is one of those illusions that text books like to create. By the time you have thought through recursive re-entry and exception handling and continuations and who knows what -- all of them available in MIT Scheme, which was used to create SICP -- nothing looks simple and easy anymore.
-- Matthias
</pre>
</blockquote>
<br>
</body>
</html>