Amazon Online Assessment (OA) - Transaction Logs
A Company parses logs of online store user transactions/activity to flag fraudulent activity.
The log file is represented as an Array of arrays. The arrays consist of the following data:
<userid1> <userid2> <# of transactions>
For example:
345366 89921 45
Note: the data is space delimited
So, the log data would look like:
345366 89921 45
029323 38239 23
...
Write a function to parse the log data to find distinct users that meet or cross a certain threshold.
The function will take in 2 inputs:
logData: Log data in form an array of arrays
threshold: threshold as an integer
Output:
It should be an array of userids that are sorted.
If same userid appears in the transaction as userid1 and userid2, it should count as one occurrence, not two.
Example:
Input:
logData:
345366 89921 45
029323 38239 23
38239 345366 15
029323 38239 77
345366 38239 23
029323 345366 13
38239 38239 23
...
threshold: 3
Output: [029323, 345366, 38239]
Explanation:
Given the following counts of userids, there are only 3 userids that meet or exceed the threshold of 3.
345366: 4 times , 38239: 5 times, 029323: 3 times, 89921: 1 time