On 21.06.2016 0:56, Brent Royal-Gordon via swift-evolution wrote:
And as I said, if we feel `filter` is unsalvageable, the alternate
Smalltalk-lineage `select` is clearer.
Than “where?”
No, than "filter". "filter" is the most common name, but "select" is
Why not x.select(where: isPrime) ? IMO this is more clear than
x.select(filter: isPrime) and looks similar to `where` in other parts of
language.
also fairly popular, and doesn't have the same ambiguity issues as
"filter". "where" is slightly clearer than "filter", but it finds little
precedent in other languages (the only other use I'm aware of is in SQL
and LINQ, which are declarative), ignores the normal grammar rules for a
FWIW `Where` is used as method also in c#
Example:
IEnumerable<int> numQuery2 = numbers.Where(num => num % 2 == 0).OrderBy(n
=> n);
method ("where" is an adverb, not a noun or verb), and is already a
language keyword which has been overloaded with several slightly
different semantics, including list filtering in the `for` loop.
– There's very significant brevity issues here, e.g.
hyperbolicArcTangent() vs atanh().
Sure, but `mappingAndFlattening(to:)` would have brevity issues as
well. (You didn't think the API Guidelines merely meant "add -ed or
-ing to everything", did you?)
That would, IMO, be:
x.flatMapping(fourCopies)
Why? If we're leaving the terms of art behind, we probably ought to
consider that the base name `flatMap` is rather opaque to new users;
I've seen people in my NSCoder group struggle with it. For that matter,
`map` and `reduce` aren't the best names either.
I can understand wanting to keep terms of art even if they're a little
opaque. I can understand wanting to invent new, clear terms. I cannot
understand wanting to make minor cosmetic changes to the terms of art
while still keeping the parts that make them opaque. You lose many of
the benefits of a term of art *and* most of the benefits of a new term.
It's a bit like painting a single wall in a room: You can match the
existing color exactly and have it look seamless, or you can choose an
obviously different color and make a statement, but choosing a slightly
different shade of the existing color does neither of those things.
_______________________________________________
swift-evolution mailing list
swift-evolution@swift.org
https://lists.swift.org/mailman/listinfo/swift-evolution
