On Friday, 2 September 2016 at 06:56:07 UTC, Lutger wrote:
I was looking for something like FirstOrDefault* from .NET in
phobos. For example, I have this piece of code:
string findBobOrReturnNull(string[] names)
{
auto r = names.find("bob");
if(r.empty) return null;
return r.front;
}
assert(findBobOrReturnNull(["alice", "bob"]) == "bob");
assert(findBobOrReturnNull(["alice"]) is null);
How can I turn that into something like this, or is there
another idiomatic way to write it as a single expression?
string findBobOrReturnNull(string[] names)
{
return names.find("bob").firstOrDefault;
}
*
https://msdn.microsoft.com/en-us/library/bb340482%28v=vs.110%29.aspx
ElementType!R firstOrDefault(R)(R r, ElementType!R def =
(ElementType!R).init)
if(isInputRange!R)
{
if(r.empty) return def;
return r.front;
}
