Are there examples of solutions to the expression problem in Racket?
What’s everyone working on this week (46/2019)? https://groups.google.com/forum/#!topic/racket-users/_3mTn5aa9UU New week, new Racket! What are you folks up to? Answer here, racket-users or at /r/racket !
(shamelessly copied from r/rust)
Hi @mflatt, Is it intentional that a built-in struct property accessor , e.g. custom-write-accessor, doesn’t pass struct-type-property-accessor-procedure??
No. That looks like a bug in the construction of custom-write-accessor and similar in non-CS Racket.
Got you.
How do I find if the current machine is x86 or not?
(system-type 'machine) seems to do it, but it seems very difficult to parse
On my Windows system it does not seem to indicate CPU arch > (system-type 'machine)
"Windows NT 10.0 (Build 18362)"
(system-library-subpath) should have the arch, but there isn’t an ideal function for this.
Beware that there isn’t really a standardized list of architecture names
The closest thing to that is the name registry used by Go in the $GOARCH environment variable. That list is a de facto standard because the spec for Docker images references it (because most of Docker was built in Go).
The arch specifiers provided by (system-library-subpath) are chosen by racket; they’re not reported by the OS.
@sorawee you can look for x86_64 or i386 in the result