Reduce() method
The following are characteristics of the reduce function, including examples of the input and output and the action the reduce method performs.
- Input: URL and a list of counts of visits of this page.
- Output: A (URL, total count of visits) pair.
- Action: Sums all counts that were output for each URL.
Input data
URL | LIST OF COUNTS
--------------+--------------------
ibm.com | {1,1,1,1,1,1}
noname.org | {1,1,1,1}
Output data
URL | TOTAL_COUNT
------------+-------------
ibm.com | 6
noname.org | 4