Hi all -

I was wondering if anyone would have an insight for me as to why the following expression is wrong:

```

for $s in ("/a/b/c", "/1/2/3")
let $t := $s => tokenize("/")[last()]
return $t

```

This is because of the predicate filter, but I'm not clear on *why* it's because of that :)

Thanks for your help!

Best,

Bridger

PS I don't always remember to look at the optimized query in the Info window, but when I do I always get a hint about something; "util:last()" in this case.

correctly
```

for $s in ("/a/b/c", "/1/2/3")

let $t := tokenize($s, "/")[last()]

return $t

```

```

for $s in ("/a/b/c", "/1/2/3")

let $t := $s => tokenize("/") => util:last()

return $t
```