purge-array deletes all elements from <array> table that was created with new-array.
After purge-array, you can use it without calling new-array again. Note however, that "average-reads" statistics (see get-array) is not reset - it keeps being computed and remains for the life of the array.
Examples
Create array, put some data in it and then delete the data:
new-array h
write-array h key"mykey" value"myvalue" purge-array h
