Recap - Frequency Counter

Part of the Logic & Flow section of Coddy's GDScript journey. Lesson 23 of 78.

Challenge

Easy

Write a function named frequency_counter with one parameter, data_list: an array of numbers and strings. It counts how many times each item appears and returns a dictionary: the keys are the different items, in the order they first appear, and each value is the count of that item.

For example, frequency_counter([1, 2, 2, 3, 3, 3]) returns {1: 1, 2: 2, 3: 3}, and frequency_counter(["apple", "pear", "apple"]) returns {"apple": 2, "pear": 1}. An empty array gives an empty dictionary.

The tests call frequency_counter() themselves and check the returned dictionary. Do not call it and do not print anything.

Try it yourself

func frequency_counter(data_list: Array):
	# Write code here
	pass

All lessons in Logic & Flow

1Strings In Depth

String Methods Searching in Strings Replace and Trim Split and Join Recap - Username Check

4Dictionaries Part 2

Nested Dictionaries Arrays of Dictionaries Merging Dictionaries Copying DictionariesRecap - Frequency Counter

7Enums

What is an Enum?Defining an Enum Enum Values Enums in Match Recap - Traffic Light

10Advanced Functions

Returning Multiple Values Lambda Functions Part 1 Lambda Functions Part 2 Recap - Lambda Sort Recursive Functions Part 1 Recursive Functions Part 2 Recap - Sum Nested Array

13Inventory Management System

Project Overview Add Item

Update Stock

Check Availability

Generate Report

2Advanced Decision Making

Match With Variables Match Guards Array Patterns Dictionary Patterns Membership Checks Recap - Command Parser

5Contact Book Application

Display Menu Add Contact

8Student Records Manager

Project Overview Add Student

11Higher-Order Functions

The map Method The filter Method The reduce Method any and all Recap - Email Validator Recap - Number Processor

14Final Challenges

Smart Contact Manager Word Analytics Data Transformer

3Multi-dimensional Arrays

2D Arrays Basics Accessing 2D Array Elements Nested Loops with 2D Arrays Recap - 2D Arrays Jagged Arrays Common 2D Array Patterns Recap - Game Board

6Sets with Dictionaries

What is a Set?Dictionary as a Set Adding and Removing Union and Intersection Set Difference Recap - Remove Duplicates

9Advanced Data Aggregation

Summing Values Finding Minimum and Maximum Custom Sorting Recap - Dictionary Sorter

12Basic Error Handling

What is Error Handling?Validating Input Guard Clauses Returning Error Codes Recap - Safe Division

Practice on your own: Online GDScript compiler