SharpTS

const greeting: string = "Hello from SharpTS!";
const version: number = 1.0;
console.log(`${greeting} v${version}`);

const languages = ["TypeScript", "C#", ".NET"];
languages.forEach(lang => console.log(`  ✓ ${lang}`));

interface Comparable<T> { compareTo(other: T): number; }
class Temperature implements Comparable<Temperature> {
    constructor(private celsius: number) {}
    get fahrenheit(): number { return this.celsius * 9 / 5 + 32; }
    compareTo(other: Temperature): number { return this.celsius - other.celsius; }
    toString(): string { return `${this.celsius}°C (${this.fahrenheit}°F)`; }
}
const temps = [new Temperature(100), new Temperature(0), new Temperature(37)];
temps.sort((a, b) => a.compareTo(b));
temps.forEach(t => console.log(t.toString()));

async function delay(ms: number): Promise<string> { return `Done after ${ms}ms`; }
async function main() {
    console.log(await delay(100));
    const all = await Promise.all([delay(50), delay(100), delay(150)]);
    all.forEach(result => console.log(result));
}
main();

const data = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
const result = data.filter(n => n % 2 === 0).map(n => n ** 2).reduce((sum, n) => sum + n, 0);
console.log(`Sum of squares of evens: ${result}`);
const [first, second, ...rest] = data;
console.log(`First: ${first}, Second: ${second}`);
console.log(`Rest: [${rest.join(", ")}]`);

console.log(`PI = ${Math.PI}`);
console.log(`E  = ${Math.E}`);
console.log(`sqrt(144) = ${Math.sqrt(144)}`);
const now = new Date("2026-03-02T12:00:00.000Z");
console.log(`ISO: ${now.toISOString()}`);
const obj = { name: "SharpTS", nums: [1, 2, 3] };
console.log(`JSON: ${JSON.stringify(obj)}`);

// Full CLI interop (the public playground intentionally disables module loading)
@DotNetType("System.Text.StringBuilder")
declare class StringBuilder {
    constructor();
    append(value: string): StringBuilder;
    toString(): string;
}
@DotNetType("System.TimeSpan")
declare class TimeSpan {
    static fromHours(value: number): TimeSpan;
    readonly totalMinutes: number;
}
const sb = new StringBuilder();
sb.append("1.5 hours = ");
sb.append(`${TimeSpan.fromHours(1.5).totalMinutes} minutes`);
console.log(sb.toString());