Host array of eq is incorrect

[polarathene]

When doing an eq or neq on two Arrays, print() will give the expected result such as [0, 1, 0], when moved to the host I would see [256, 0, 0]. For neq [1, 0, 1] would convert to [65537, 0, 0].

let length = result.elements() as usize;
let mut rdata: Vec<u32> = vec![0; length];
result.host::<u32>(&mut rdata);

I've found out changing u32 to u8 gives the correct array values. The docs don't mention the Array returned is u8. I'm not familiar enough with Rust but would assume if the output for eq/neq is always in u8 values that could be typed and the compiler would pick up on it for the developer to understand what happened?

[9prady9]

eq() is a comparison operation and thus the result of that operation is boolean in nature irrespective of the input Array type. This is expected behaviour of this function. ArrayFire's upstream implementation represents boolean results using char C type. So, the output of eq() call should be an Array of type DType::B8 - the equivalent enum value of ArrayFire C API is b8. Hence, one would only get correct values if a Vector of u8 or s8 is used to retrieve the values to host side.

I shall leave this issue open until the docs are updated indicating the output Array's type for such comparison operations. Thank you.

I understand that you have requested for type-checked Arrays, here and in other issues you have created, however changing the current wrapper to implement type check is much bigger change. We have left the issue#98 open for discussions related to type checked Arrays.