Get usage specifics for a hash table.
get-hash provides usage specifics of a hash table <hash> (created by
new-hash).
Use
"length" clause to obtain its <length> (i.e. the number of elements stored in it),
"size" clause to obtain its <size> (i.e. the number of
"buckets", or possible hash codes) and
"average-reads" clause to obtains the average number of <reads> (i.e. how many string comparisons are needed on average to find a key).
Each of these number variables can be created with
"define".
This information may be useful in determining the performance of a hash, and whether
resize-hash is indicated.