Missing type annotation for `T`

Question

I am trying to build code with simple javascript function below:

filterArray(user: any, items: Array<Object>) {
    items = items.filter(item => {return true;});
    return items;
}

But I am getting below error:

Missing type annotation for `T`. `T` is a type parameter declared in array type [1] and was implicitly instantiated at
call of method `filter` [2].

   src/mod/test.js:69:15
   69|       items = items.filter(item => {return true;});
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [2]

References:
   src/mod/test.js:69:15
   69|       items = items.filter(item => {return true;});
                     ^^^^^ [1]

I am using flow and building using npm.

Answer 1

This error says your annotation is missing. Add return type annotation to function

function add(x: number, y: number): number {
return x + y;

}