Position built-in function with "test" instead of "pattern matching"? [duplicate]

Question

I read the doc about Position built-in function:

"Position[expr, pattern] gives a list of the positions at which objects matching pattern appear in expr."

For instance:

Position[{"a", "b", "A", "a", "B", "c", "b"}, "b"]

returns

{{2}, {7}}

However, I am desperately looking for a built-in function that works with a test instead of a pattern matching. To be clear I would like a built-in function that behaves as follow:

(* does not work, for illustration purpose *)
Position[{"a", "b", "A", "a", "B", "c", "b"},UpperCaseQ] 

would return:

{{3}, {5}}

I am aware of the Select function,

Select[{"a", "b", "A", "a", "B", "c", "b"}, UpperCaseQ]

but it returns values and not positions (and I want positions!):

{"A", "B"}

Question: Do I miss read the doc, maybe such built-in function exist?

Answer 1

Position[UpperCaseQ /@ vars, True]

Answer 2

I just found this:

Position[{"a", "b", "A", "a", "B", "c", "b"}, _String?UpperCaseQ]

is working.

---

Update: Albert Retey, just rightly commented that it works without the head check.

For instance:

Position[Range[10], _?OddQ]

is working.

Answer 3

You could try something like this.

vars = {"a", "b", "A", "a", "B", "c", "b"};

Position[Table[UpperCaseQ[vars[[i]]], {i, Length[vars]}], True]

(*{{3},{5}}*)