Top "Racket" questions

Racket is an extensible multi-paradigm programming language in the Lisp/Scheme family.

What exactly is a symbol in lisp/scheme?

For the love of the almighty I have yet to understand the purpose of the symbol 'iamasymbol. I understand numbers, …

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How do I find the index of an element in a list in Racket?

This is trivial implement of course, but I feel there is certainly something built in to Racket that does this. …

lisp scheme racket
Programming Scheme(Racket) with VIM - How to get started

recently, I started programming Racket (formerly Scheme) in DrRacket. I quite fast I began to miss all the features of …

vim lisp scheme racket
set-car!, set-cdr! unbound in racket?

I am just trying to do very simple code with set-car! and set-cdr! in racket, but I got the error: …

scheme racket
I got "scheme application not a procedure" in the last recursive calling of a function

so here is the code: (define (time-prime-test n) (newline) (display n) (start-prime-test n (runtime))) (define (start-prime-test n start-time) (if (prime? …

recursion if-statement scheme racket
How do you load a file into racket via command line?

I have been trying to launch a racket program from the commandline (via 'racket') but have not been having success. …

scheme racket
Use of local in Racket/Scheme

In Exercise 18.1.12 from htdp, I've re-written the maxi function using "local". ;; maxi : non-empty-lon -> number ;; to determine the largest …

scheme racket htdp
About "If.." in Scheme (plt-scheme)

I had a pretty simple requirement in my Scheme program to execute more than one statement, in the true condition …

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What is the difference between quote and list?

I know that you can use ' (aka quote) to create a list, and I use this all the time, …

scheme racket evaluation quote
Dr Racket problems with SICP

I'm working through SICP. Currently, in the first chapter, I'm having problems getting Racket to let me redefine "primitives". For …

lisp scheme racket sicp