harmanjd <[email protected]> writes: > My question is if there is some implied meaning by ending a field in > _! or not? It seems confusing as a newbie to have that when scala has > an _ operator and a _*. I got confused with names like 'dirty_?' > and have to think 'is that an operator of some sort that I need to > lookup or is that just a name?
Can't speak for their specific etymology in lift, but this kind of usage
of '?' and '!' has a long history in other functional languages.
Scheme, in particular, has a strong convention that a predicate (no side
effects, returns a boolean answering questions about a piece of data
ends in '?', and an imperative or destructive operation (changes a piece
of data in-place, instead of returning a new object and is thus execute
for its side effects), ends in '!'.
The addition of '_' in lift is stylistic, I guess...
--
Jim Wise
[email protected]
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