列出计划的理解库？

Question

I know there is a list-comprehension library for common lisp ( incf-cl ), I know they're supported natively in various other functional (and some non-functional) languages (F#, Erlang, Haskell and C#) - is there a list comprehension library for Scheme?

incf-cl is implemented in CL as a library using macros - shouldn't it be possible to use the same techniques to create one for Scheme?

Answer 1

• Swindle is primarily a CLOS emulator library, but it has list comprehensions too. I've used them, they're convenient, but the version I used was buggy and incomplete. (I just needed generic functions.)
• However, you probably want SRFI-42 . I haven't used it, but it HAS to have fewer bugs than the Swindle list comprehensions.

I don't know which Scheme you use. PLT Scheme bundles Swindle and SRFI-42. Both are supposed to be cross-Scheme compatible, though.

If you use PLT Scheme, here is SRFI-42's man page . You say (require srfi/42) to get it.

Answer 2

您可以将LINQ用于R6RS方案 （尽管可以使其在“较旧”的实现下运行）。