Hi,

I’m new to Julia and trying to solve the cryptopals challenge: https://cryptopals.com/sets/1/challenges/6

This challenge requires to compute the hamming distance between two strings:

```
str1 = "this is a test"
str2 = "wokka wokka!!!"
```

The Hamming distance is the number of differing bits. In the above case the distance must be 37.

My approach was the following:

`Vector{UInt8}(str1) .!= Vector{UInt8}(str2)`

but this is wrong (results in a distance of 14)

I get the same results using the `hammond`

function in the `Distances`

package.

To confirm that 37 is correct I converted the strings to their bit values using an ASCII table (by hand)

```
s1 = [0,1,1,1,0,1,0,0,0,1,1,0,1,0,0,0,0,1,1,0,1,0,0,1,0,1,1,1,0,0,1,1,0,0,1,0,0,0,0,0,0,1,1,0,1,0,0,1,0,1,1,1,0,0,1,1,0,0,1,0,0,0,0,0,0,1,1,0,0,0,0,1,0,0,1,0,0,0,0,0,0,1,1,1,0,1,0,0,0,1,1,0,0,1,0,1,0,1,1,1,0,0,1,1,0,1,1,1,0,1,0,0]
s2 = [0,1,1,1,0,1,1,1,0,1,1,0,1,1,1,1,0,1,1,0,1,0,1,1,0,1,1,0,1,0,1,1,0,1,1,0,0,0,0,1,0,0,1,0,0,0,0,0,0,1,1,1,0,1,1,1,0,1,1,0,1,1,1,1,0,1,1,0,1,0,1,1,0,1,1,0,1,0,1,1,0,1,1,0,0,0,0,1,0,0,1,0,0,0,0,1,0,0,1,0,0,0,0,1,0,0,1,0,0,0,0,1]
```

now the distance is indeed 37:

```
julia> sum(abs.(s1 .- s2))
37
```

What is a more elegant solution to this problem?