Normalize and Filter Event Records | Dataford Interview Questions

Given an array of event record strings records, implement a function that returns a new array containing only valid transformed records. Each input string has the form "key:value". A record is valid if it contains exactly one colon, the key is non-empty after trimming spaces, and the value is non-empty after trimming spaces. For each valid record, return it as "KEY=value", where the key is uppercased and duplicate keys keep only their last valid value while preserving the key's first appearance order.

Constraints

1 <= len(records) <= 10^4
0 <= len(records[i]) <= 10^3
Each record is a string
Preserve first appearance order of valid keys
Ignore invalid records instead of raising errors

Function Signature

def transform_records(records):

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Problem

Constraints

1 <= len(records) <= 10^4
0 <= len(records[i]) <= 10^3
Each record is a string
Preserve first appearance order of valid keys
Ignore invalid records instead of raising errors

Function Signature

def transform_records(records):

Your question is Normalize and Filter Event Records. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.