scala - missing parameter type in lambda -

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i have following in worksheet:

val tarr = array((1, some(1.0)), (2, some(6.0))) val r1 = tarr exists function.tupled((_, sf: option[double]) => sf == none)

the ide complays missing parameter type _ worksheet spits out desired result.

if plug same line of code in package , compile, compilation stops with, again, missing parameter type both _ , sf

i bit confused on why need specify type there , why worksheet works , compilation no.

in eclipse ide, code works fine

object yrd { val tarr = array((1, some(1.0)), (2, some(6.0)))                                                //> tarr  : array[(int, some[double])] = array((1,some(1.0)), (2,some(6.0)))

val r1 = tarr exists function.tupled((_, sf: option[double]) => sf == none) //> r1 : boolean = false

}


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