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Guide Closures
GitHub Actions edited this page Jan 25, 2026
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VelinScript unterstützt Lambda Functions (Closures) für funktionale Programmierung.
let add = (a: number, b: number) => a + b;
let result = add(5, 3); // 8
let multiply = (a: number, b: number) => {
let result = a * b;
return result;
};
Lambdas können als Parameter übergeben werden:
fn applyOperation(a: number, b: number, op: fn(number, number) -> number): number {
return op(a, b);
}
let result = applyOperation(10, 5, (x: number, y: number) => x - y);
Lambdas arbeiten perfekt mit Collections:
let numbers = List<number>([1, 2, 3, 4, 5]);
// Map
let doubled = numbers.map((x: number) => x * 2);
// Filter
let evens = numbers.filter((x: number) => x % 2 == 0);
// Reduce
let sum = numbers.reduce((acc: number, x: number) => acc + x, 0);
Lambdas unterstützen Type Inference:
// Type wird automatisch inferiert
let square = (x) => x * x; // x ist number
Lambdas können Variablen aus dem umgebenden Scope erfassen:
let factor = 10;
let multiply = (x: number) => x * factor;
let result = multiply(5); // 50
Lambdas können für Currying verwendet werden:
let add = (a: number) => (b: number) => a + b;
let addFive = add(5);
let result = addFive(3); // 8
- Verwende Lambdas für kurze, einfache Operationen
- Nutze Named Functions für komplexe Logik
- Kombiniere Lambdas mit Collections für funktionale Programmierung
- Nutze Type Inference wo möglich
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