-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Mon, Nov 21, 2016 at 11:32:28AM +0100, Daniel Llorens wrote: > > Hello, > > version 2.2 of Guile will (I hope) include rank-polymorphic versions > of array-ref, array-set! and array-for-each. What this means is that > instead of requiring as many indices as the rank of the array, with > these functions you can give fewer indices and get a subarray (a > ‘prefix slice’). If you give all the indices, they behave just as > the current versions.
Yay! (the really exciting part is in the PSen). > My original intention was for these functions to replace array-ref > and array-set!. That's how a number of array languages/libraries do > it (numpy, to mention a popular one. You don't need to say A[i, :, :], > you can just say A[i].). However, the maintainers spoke against this, > so these functions need different names. Understandable... but a pity, really. [J...] Uh, oh. That's NSFW material ;-) My head exploded (faint memories of APL). > civodul has proposed array-slice instead of array-from. However, > array-from only returns a slice when the rank of the result would > be positive. wingo has pointed out that it is unusual to have a > function name ending in a preposition. > > What do *you* think should be the names of these functions? I do like slice. But I'm perhaps off because I don't quite understand your mumblings about "the rank of the result would be positive". What do they return otherwise? Do they throw an exception? thanks - -- t -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlgy7twACgkQBcgs9XrR2kZ/9wCbBS0lNcujS1Z9YHZt55TRe5fm RlQAmwZ7mNBfIH28JCCocEO/FXkT1VH8 =9Mxq -----END PGP SIGNATURE-----
