Implement Underscore-Style Pluck | Dataford Interview Questions

Hotstar client code often transforms arrays of content metadata before rendering a carousel or search result list. Implement a Python equivalent of Underscore's pluck method that extracts one field from every record while preserving order.

Formal Specification

Given records, a list of dictionaries, and field, a string, return a new list containing record[field] for each record in order. If a record does not contain field, append None. The input records and dictionaries must not be modified. Field values may be any JSON-compatible value, including 0, False, an empty string, lists, or nested dictionaries.

Constraints

0 <= len(records) <= 10^5
Each record is a dictionary with string keys
field is a non-empty string
Each field value is JSON-compatible

Function Signature

def pluck(records, field):

Your question is Implement Underscore-Style Pluck. 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.

Problem

Formal Specification

Constraints

0 <= len(records) <= 10^5
Each record is a dictionary with string keys
field is a non-empty string
Each field value is JSON-compatible

Function Signature

def pluck(records, field):

Your question is Implement Underscore-Style Pluck. 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.