Getting Values
Part of the Fundamentals section of Coddy's Dart journey — lesson 62 of 94.
The values property of a map returns an iterable collection of all the values in the map. This lets you access just the values without their keys.
Create a map of student scores:
Map<String, int> scores = {
'Alice': 95,
'Bob': 85,
'Charlie': 90
};Get all the values from the map:
Iterable<int> studentScores = scores.values;
print('Student scores: $studentScores');After executing the above code, the output will be:
Student scores: (95, 85, 90)You can also iterate through all the values using a for-in loop:
for (int score in scores.values) {
print(score);
}After executing the above code, the output will be:
95
85
90Challenge
BeginnerIn this challenge, you'll practice using the values property to get all the values from a map. The values property returns an iterable collection of all the values in a map, similar to how keys returns all the keys.
Complete the code to get all the values from the fruitPrices map and store them in the prices variable.
Expected output:
(1.99, 0.99, 2.49)Cheat sheet
The values property of a map returns an iterable collection of all the values in the map without their keys.
Get all values from a map:
Map<String, int> scores = {
'Alice': 95,
'Bob': 85,
'Charlie': 90
};
Iterable<int> studentScores = scores.values;
print('Student scores: $studentScores'); // Output: Student scores: (95, 85, 90)Iterate through all values using a for-in loop:
for (int score in scores.values) {
print(score);
}
// Output:
// 95
// 85
// 90Try it yourself
void main() {
// A map of fruits and their prices
Map<String, double> fruitPrices = {
'apple': 1.99,
'banana': 0.99,
'orange': 2.49
};
// TODO: Get all the values (prices) from the fruitPrices map
// and store them in the prices variable
var prices;
// This will print all the prices
print(prices);
}This lesson includes a short quiz. Start the lesson to answer it and track your progress.
All lessons in Fundamentals
4Operators Part 2
Comparison OperatorsLogical ANDLogical ORLogical NOTType Test OperatorsRecap - Making Comparisons7Working with Strings
String ConcatenationString InterpolationMulti-line StringsString PropertiesBasic String Methods10Collections - Maps Basics
What are Maps?Creating a MapAccessing Values by KeyKey-Value PairsGetting Map SizeGetting KeysGetting ValuesChecking if a Key Exists13Null Safety In Depth
Understanding NullNullable TypesNon-Nullable TypesNull Assertion OperatorLate InitializationRecap - Handling Null Safely16Fundamentals Challenges
Challenge: List of calculationChallenge: Sum of numbersChallenge: Find product2Variables and Basic Data Types
What are Variables?StringsIntegers (int)Doubles (double)Booleans (bool)Type Inference with 'var'Final VariablesConstant VariablesNaming ConventionsBasic Null SafetyRecap - Declaring Variables8Control Flow - Loops
The 'for' LoopThe 'while' LoopThe 'do-while' LoopUsing 'break' in LoopsUsing 'continue' in LoopsRecap - Repeating Code3Operators Part 1
Arithmetic OperatorsInteger DivisionModulo OperatorIncrement and DecrementAssignment ShortcutsRecap - Simple Calculations6Control Flow - Decision Making
The 'if' StatementThe 'else' StatementThe 'else if' StatementRecap - Simple DecisionsNested 'if' StatementsThe 'switch' Statement9Collections - Lists Basics
What are Lists?Creating a ListAccessing by IndexGetting List LengthAdding ElementsRemoving ElementsChecking if a List is EmptyIterating Over a List12Functions Advanced
Optional Positional ParametersNamed ParametersRequired Named ParametersDefault Parameter ValuesRecap - Function Parameters15Project: Simple Calculator
Setting UpDeclaring Number