Integer and String Dictionary Keys for Fast Access

[Lance]

Hi,

I'd like each element of a dictionary to have two keys, one a string and the
other an integer. Each of course would be unique relative to the other keys
and associated with a single dictionary value.

The advantage is that key lookups by integer are no doubt much faster than
by strings. At least that's what I find with GAUSS, a matrix programming
language. GAUSS let's users refer to a dictionary value by its string key or
integer key. Referring to the value by its integer key significantly speeds
execution in optimization routines.

Any suggestions?

Thanks in advance.
Lance