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phoe
Implement points from Naggum
16:33 < flip214> http://www.xach.com/naggum/articles/[email protected] 16:33 < flip214> and http://www.xach.com/naggum/articles/[email protected]
http://www.xach.com/naggum/articles/[email protected]
finally, another option is to rename REMOVE-IF-NOT to EXTRACT-IF and DELETE-IF-NOT to KEEP-IF or somesuch and perhaps invent useful names of the other -IF-NOT functions,
if anything, REMOVE-IF-NOT is FILTER for me, but that's just a side note of a single person.
http://www.xach.com/naggum/articles/[email protected]
I have defined functions COLLECT and RETAIN as the semantic complements of REMOVE and DELETE, with -IF and -IF-NOT variants.
http://www.xach.com/naggum/articles/[email protected]
it would have been nice if one could "prime" a hash table in the MAKE-HASH-TABLE form, as in keyword arguments named INITIAL-CONTENTS (like MAKE-ARRAY) and/or INITIAL-KEYS and INITIAL-VALUES.
it would have been nice if one could "prime" a hash table in the MAKE-HASH-TABLE form, as in keyword arguments named INITIAL-CONTENTS (like MAKE-ARRAY) and/or INITIAL-KEYS and INITIAL-VALUES.
ALEXANDRIA:PLIST-HASH-TABLE and ALEXANDRIA:ALIST-HASH-TABLE already solve this.
@phoe ah yeah, right. Forgot about those.
He also talked about a readable form (eg. #H), which does not exist in CL.
Can you link me to that post about readtables?
W dniu 2017-05-11 11:00, Philipp Marek napisał(a):
@phoe [1] ah yeah, right. Forgot about those.
He also talked about a readable form (eg. #H), which does not exist in CL.
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http://www.xach.com/naggum/articles/[email protected]
adding insult to injury, COMPLEMENT is incredibly expensive in all the Lisps I have used.
Not sure whether this is still an issue (the performance of COMPLEMENT), but at least it looks like a nice piece of history worth remembering.
(define-complement = /=)
...
Update: http://www.xach.com/naggum/articles/[email protected]
This seems very implementation-dependent. AFAIK, an implementation might actually want to choose to implement COMPLEMENT this way as an optimization.
http://www.xach.com/naggum/articles/[email protected] http://www.xach.com/naggum/articles/[email protected]
Binding-specs that include types
https://www.xach.com/naggum/articles/[email protected] is a neat idea as well; would be nice to know which implementations support this extension.
(funcall #'(flet foo bar))