Count Elements by Key | Dataford Interview Questions

Create an object from an array where each element becomes a key and the value is the count of that element.

Implement count_elements(arr). The input is a list of integers, and the output is a dictionary whose keys are the string representation of each integer and whose values are occurrence counts. Return an empty dictionary for an empty array.

Function signature: def count_elements(arr):

Constraints

0 <= len(arr) <= 10^5
arr contains integers
Output keys are the string representations of the input integers

Function Signature

def count_elements(arr):

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Problem

Create an object from an array where each element becomes a key and the value is the count of that element.

Function signature: def count_elements(arr):

Constraints

0 <= len(arr) <= 10^5
arr contains integers
Output keys are the string representations of the input integers

Function Signature

def count_elements(arr):

Your question is Count Elements by Key. 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.