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Data Transformer

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

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Challenge

Hard

Turn student records into a report. The program reads a whole number n, then n records. A record has three fields separated by ;: a student id, the grades (whole numbers separated by commas) and the subjects (separated by commas):

S123;88,92,85;Math,Science,History

A student is qualified when every grade is above 70 (a grade of exactly 70 does not qualify). Check it with the array method all().

Print Qualified students: and how many there are. Then, for each qualified student in input order, print the id, : and the average of the grades with two decimals. Then print Subjects: and, for each subject taken by at least one qualified student, the subject, : and how many qualified students take it, in the order the subjects first appear.

For these inputs:

3
S123;88,92,85;Math,Science,History
S124;65,95,80;Math,Science,English
S125;91,89,92;Math,Physics,History

the output is:

Qualified students: 2
S123: 88.33
S125: 90.67
Subjects:
Math: 2
Science: 1
History: 2
Physics: 1

S124 is not qualified because of the grade 65, so English is not counted. With no qualified students, the output ends with the line Subjects:.

Try it yourself

extends Node

func _ready():
	var n := int(OS.read_string_from_stdin())
	# Read n records, then print the qualified students and the subjects
	pass

All lessons in Logic & Flow

1Strings In Depth

String MethodsSearching in StringsReplace and TrimSplit and JoinRecap - Username Check

4Dictionaries Part 2

Nested DictionariesArrays of DictionariesMerging DictionariesCopying DictionariesRecap - Frequency Counter

7Enums

What is an Enum?Defining an EnumEnum ValuesEnums in MatchRecap - Traffic Light

10Advanced Functions

Returning Multiple ValuesLambda Functions Part 1Lambda Functions Part 2Recap - Lambda SortRecursive Functions Part 1Recursive Functions Part 2Recap - Sum Nested Array

13Inventory Management System

Project OverviewAdd ItemProject lessonUpdate StockProject lessonCheck AvailabilityProject lessonGenerate ReportProject lesson

2Advanced Decision Making

Match With VariablesMatch GuardsArray PatternsDictionary PatternsMembership ChecksRecap - Command Parser

5Contact Book Application

Display MenuAdd ContactProject lessonView ContactProject lessonEdit ContactProject lessonDelete ContactProject lessonList AllProject lessonEverything TogetherProject lesson

8Student Records Manager

Project OverviewAdd StudentProject lessonAdd GradeProject lessonIs EnrolledProject lessonAverage GradeProject lessonList by CourseProject lessonTop StudentsProject lesson

11Higher-Order Functions

The map MethodThe filter MethodThe reduce Methodany and allRecap - Email ValidatorRecap - Number Processor

14Final Challenges

Smart Contact ManagerWord AnalyticsData Transformer

3Multi-dimensional Arrays

2D Arrays BasicsAccessing 2D Array ElementsNested Loops with 2D ArraysRecap - 2D ArraysJagged ArraysCommon 2D Array PatternsRecap - Game Board

6Sets with Dictionaries

What is a Set?Dictionary as a SetAdding and RemovingUnion and IntersectionSet DifferenceRecap - Remove Duplicates

9Advanced Data Aggregation

Summing ValuesFinding Minimum and MaximumCustom SortingRecap - Dictionary Sorter

12Basic Error Handling

What is Error Handling?Validating InputGuard ClausesReturning Error CodesRecap - Safe Division

Practice on your own: Online GDScript compiler