Merge branch '2025-typescript'

Author: egges

.vscode/settings.json

@@ -0,0 +1,9 @@
+{
+    // Python settings
+    // "python.envFile": "${workspaceFolder}/.env",,
+    // Test settings
+    "python.testing.pytestEnabled": true,
+    // "python.testing.unittestEnabled": false,
+    "python.testing.cwd": "${workspaceFolder}/tests",
+    "python.defaultInterpreterPath": "${workspaceFolder}/2025/typescript/lokalise/.venv/bin/python"
+}

2025/typescript/addition.ts

@@ -0,0 +1,7 @@
+function add(a: number, b: number): number {
+	return a + b;
+}
+
+console.log(add(5, 10)); // Compiles fine
+console.log(add("5", "10")); // Compilation error
+console.log(add("5", 10)); // Compilation error

2025/typescript/compiler_error.ts

@@ -0,0 +1,6 @@
+function processData(data: string): string {
+	return data.toLowerCase();
+}
+
+console.log(processData("Hello")); // Works
+console.log(processData(123)); // Compilation error

2025/typescript/conversions.js

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+console.log(true + true === 2) // => true
+console.log(true !== 1) // => true

2025/typescript/dynamic_typing.ts

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+let variable: any = 42;  // variable is now of type number
+variable = 'hello world';  // variable is now of type string

2025/typescript/function.py

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+from typing import Callable
+
+type Greet = Callable[[str], str]
+
+
+def greet_fn(name: str) -> str:
+    return f"Hello, {name}!"

2025/typescript/function.ts

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+type Greet = (name: string) => string;
+const greetFn: Greet = (name) => `Hello, ${name}!`;

2025/typescript/greet.py

@@ -0,0 +1,5 @@
+def greet(name: str) -> str:
+    return f"Hello, {name}!"
+
+
+print(greet("Arjan"))

2025/typescript/greet.ts

@@ -0,0 +1,5 @@
+function greet(name: string): string {
+	return `Hello, ${name}!`;
+}
+
+console.log(greet("Arjan"));

2025/typescript/interface.ts

@@ -0,0 +1,18 @@
+interface Vehicle {
+    speed: number;
+    drive(): void;
+}
+
+class Car implements Vehicle {
+    constructor(public speed: number) {}
+
+    drive(): void {
+        console.log(`Driving at ${this.speed} km/h`);
+    }
+}
+
+const myCar: Vehicle = new Car(120);
+myCar.drive(); // ✅ Works fine
+
+const randomObject = { speed: 100, drive: () => console.log("Zoom!") };
+const anotherCar: Vehicle = randomObject; // ✅ Also works because it matches the interface