FIND_PREV Method

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.
Applies to: Hash object
Syntax
Details
See Also

Syntax

rc=object.FIND_PREV( );

Arguments

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.

Details

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 the HAS_NEXT Method for an example.

See Also

Non-Unique Key and Data Pairs in SAS Language Reference: Concepts
Methods:
FIND Method
FIND_NEXT Method
HAS_PREV Method
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