Haskell- Pattern syntax in expression context: _
haskell, syntax
Solution
`_` is valid only inside patterns, you're trying to use it inside an expression: `head (drop n (b : _))`. Since you don't really need to decompose the list, and you do need the tail, the solution is to do:
elempos n xs = head (drop n xs)
Problem
I have been learning some Haskell and writing very simple programs. I want to make a function that will return the element at the given position. Here's what I tried to do- ``` elempos::Int->[a]->a elempos n (b:_)=head (drop n (b:_) ) ``` But I'm getting this error when I load the Test.hs file in the GHCi editor. ``` Pattern syntax in expression context: _ ``` And it says Failed, modules loaded:none. Since I'm very new to the language I don't really have a proper idea what the mistake is(currently at chapter 4 of learn you a haskell). Can anyone tell me what is wrong here?