phrase/2 may be useful to describe lists more compactly

[triska]

For example, instead of:

append(B1, B2, B12),
append(B3, B4, B34),
append(B12, B34, B1234),
append(B1234, B5, B12345),
append(B12345, [0], B),

you can use phrase/2 from library(dcgs) to write this as:

phrase((B1,B2,B3,B4,B5,[0]), Bs)

yielding the list Bs.

[aarroyoc]

Much cleaner! I'll try to see if I can use it on more places