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I had a pretty simple requirement in my Scheme program to execute more
than one statement, in the true condition of a 'if'. . So I write my
code, something like this:
(if (= 1 1)
((expression1) (expression2)) ; these 2 expressions are to be
executed when the condition is true
(expression3)…
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(define (read-all-input)
(local ((define line (bytes->list (read-bytes 4))))
(if (eof-object? line)
empty
(cons line (read-all-input)))))
(void (read-all-input))
The above code fails because bytes-list expects an argument of type byte string, but is given #
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Does R6RS or Chez Scheme v7.9.4 have a library function to check if a list contains duplicate elements?
Alternatively, do either have any built in functionality for sets (which dis-allow duplicate elements)? So far, I've only been able to find an example here.
The problem with that is that it doesn't…
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Hi,
I'm a beginning student in CS, and my classes are mostly in Java. I'm currently going through "Little Schemer" as a self study, and in the process of finding out how to do that I have found numerous references to "implementations" of Scheme. My question is, what are implementations?
Are they…
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Isn't it possible to treat functions in Scheme as any other list?
Basically, what I want do to is something like this:
(define (foo) "hello")
(cdr foo) ; or similar, should return the list ((foo) "hello")
I've found a similar discussion about this, and I feel a bit disappointed if this is not…
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Macports Apache2 not starting at Mac Osx snow leopard boot.
I've done the launchctl load command, the symlinks point to my /opt/local//etc/LaunchDaemeons/org.macports.apache2/org.macports.apache2.plist, but it never starts. I can start it manually, works fine after that. Just wont load on startup…
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When I try to enable the FTP service in the preferences (File Sharing-Options-Share Files and Folders Using FTP) the check box enables and then disables again. The console is giving me the message :
16/04/2010 12:14:20 com.apple.coreservicesd[51] sh: launchctl: command not found
This indicates…
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Macports Apache2 not starting at Mac Osx snow leopard boot. I've done the launchctl load command, the symlinks point to my /opt/local//etc/LaunchDaemeons/org.macports.apache2/org.macports.apache2.plist, but it never starts. I can start it manually, works fine after that. Just wont load on startup…
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Hi
I got this error:
Timexxxx In 'CFPasteboardCopyData', file /SourceCache/CF/CF-550.13/AppServices.subproj/CFPasteboard.c, line 1951, during lock, spin lock 0x15457a0c8 has value 0xf0000000, which is neither locked nor unlocked. The memory has been smashed.
My Mac freezes except the mouse and…
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After restoring from backup following filesystem corruption my user account hangs after login (After entering my password the login window disappears and all I get is the background and a mouse pointer, no spinning wheel of death etc ..) I can login as a different user and then logout and login as…
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