On Friday, 11 May 2012 at 23:51:47 UTC, Mehrdad wrote:
On Friday, 11 May 2012 at 21:53:06 UTC, Jonathan M Davis wrote:
I know that haskell has such a function, and there were a
number of complaints previously that we _didn't_ have an any
function which does exactly what std.algorithm.any now does.
It's a very functional approach to use predicates like that
and I get the impression that it's common in other functional
languages based on other's comments. The only one off the top
of my head that I _know_ has such a function though is haskell.
Again, I know enough FP to know what predicates are, and of
course, this is common in functional languages.
Even Scheme has a 'there-exists?' function just for this
purpose.
I wasn't saying having "such a function" is weird -- I was just
asking if you know of any languages in which the NAME is
"any()",
since I would've imagined it to be something more intuitive like
"exists()" or "contains" or "has" or whatever.
(I was giving C# as an example, because C# uses "Any()" to mean,
"are there any elements in this list?", NOT with the meaning D
uses.)
In .NET 3.5, and later, 'Any()' has an overload that takes a
predicate so it behaves identical to 'any' in Haskell and D.
public static bool Any<TSource>(
this IEnumerable<TSource> source,
Func<TSource, bool> predicate
)
The Exists method is an older construct with a more limited
application (List vs IEnumerable)
