Hash and Hash Iterator Object Language Elements |
Sets the current list item to the previous item in the current
key's multiple item list and sets the data for the corresponding data variables.
- rc
-
specifies whether the method succeeded or failed.
A return code of zero indicates success; a nonzero value indicates failure.
If you do not supply a return code variable for the method call and the method
fails, an appropriate error message is printed to the log.
- object
-
specifies the name of the hash object.
The FIND method determines whether the key exists in the
hash object. The HAS_PREV method determines whether the key has multiple data
items associated with it. When you have determined that the key has a previous
data item, that data item can be retrieved by using the FIND_PREV method,
which sets the data variable to the value of the data item so that it is available
for use after the method call. Once you are in the data item list, you can
use the HAS_PREV and FIND_PREV methods in addition to the HAS_NEXT and FIND_NEXT
methods to traverse the list. See HAS_NEXT Method for an example.
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