As far as val vs let goes, I actually prefer val, because it has symmetry with var. That is to say "variable foo" is more similar to "value foo" than "let foo,"

As far as val vs let goes, I actually prefer val, because it has symmetry with var. That is to say "variable foo" is more similar to "value foo" than "let foo," since "value" is an adjective like "variable". Of course, I suppose this is personal preference.