block() with unknown arity

arity.io

arity := block (
    "You provided #{call argCount} args" interpolate println
    call evalArgs foreach (arg, "... #{arg}" interpolate println)
)

// "call evalArgs" is a shortcut for "call message argsEvaluatedIn(call sender)"

var := "test"
arity call( "1", 2 + 2, var );
arity call

# You provided 3 args
# ... 1
# ... 4
# ... test
# You provided 0 args

arity_uneval.io

arityUnEval := block (
    "You provided #{call argCount} args" interpolate println
    call message arguments foreach (arg, "... #{arg}" interpolate println)
)

arityUnEval call( "1", 2 + 2, var );

# You provided 3 args
# ... "1"
# ... 2 +(2)
# ... var