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<dzoe>
Anyone still on Racket 6.7?
<dzoe>
system error: /home/pi/.racket/6.7/pkgs/termios/termios/private/compiled/native/arm-linux/3m/defines_ss.so: undefined symbol: scheme_thread_locals
<dzoe>
I am trying to understand what's happening here and I don't get it much.
<dzoe>
Under 7.1 (on my laptop running Ubuntu), raco pkg install termios works fine
<dzoe>
But under 6.7 (on raspberry pi with raspbian) the compilation fails after compiling defines_ss.so
<dzoe>
And yes, objdump -t confirms the symbol is not there
<dzoe>
But my understanding is that the compilation process should just generate the right symbols no matter what
<dzoe>
(The package is rather simple and the code is easy to follow)
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<lavaflow>
what would be the quickest way to check if a string starts with a specified character?
<lavaflow>
I know about string-prefix?, but I'm wondering if optimising for the case of a single-character prefix would be worthwhile if I'm running this many times in a very tight loop that I want to be quick
<lavaflow>
I don't really know enough about racket's internals and how it handles strings to have a good intuition for this.
<nisstyre>
lavaflow: I would guess that it could be slightly faster if you're using byte strings since you would only be comparing bytes
<nisstyre>
but I have no idea really
<nisstyre>
lavaflow: string-prefix? is probably too general if you just want to check the first character
<lavaflow>
that's my suspicion
<lavaflow>
I guess I'll start benchmarking stuff and see what actually works
<nisstyre>
lavaflow: what about this
<nisstyre>
> (char=? #\a (string-ref "abc" 0))
<nisstyre>
#t
<lavaflow>
hmm yes, I wager that would be quick
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<sobhan>
hi
<meepdeew>
o/
<sobhan>
is there a way to make brag more debugging friendly?
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<sobhan>
can i use format-id to create an identifier?
<sobhan>
like more generically can i put a function that will generate an id for me??
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<bremner>
sobhan: with the caveat that format-id returns a syntax object, sure, that's exactly what it does
<bremner>
or is your question about something else?
<sobhan>
bremner, i want to do something like (let ([(format-id something) 10) the result of format-id)
<bremner>
oic.
<bremner>
no, I don't think that will (directly) work