"as" considered harmful?

[synn]

@chrisd @ZiCog
Check this out: I32 vs isize, u32 vs usize - #3 by cuviper

By @cuviper
Use usize and isize when it’s related to memory size – the size of an object, or indexing a vector, for instance. It will be a 32-bit number on 32-bit platforms, as that’s the limit of memory they can address, and likewise for 64-bit.

(He's from the Rust team, and he won't be wrong, that is what I meant to say in my original post)