Typescript Disposable (using statement)

Using.ts

// NOTE: This is now rolled up in a package and supports more scenarios: https://github.com/dsherret/using-statement

interface IDisposable {
    dispose();
}

function using<T extends IDisposable>(resource: T, func: (resource: T) => void) {
    try {
        func(resource);
    } finally {
        resource.dispose();
    }
}

// Example use:

class Camera implements IDisposable {
    takePicture() { /* omitted */ }
    // etc...
    dispose() {
        navigator.camera.cleanup();
    }
}

using(new Camera(), (camera) => {
    camera.takePicture();
});

Great!

Appreciated 👏.

Nice

@maca134 in case you want to return a value from it

export async function using<T extends IDisposable, U>(resource: T, func: (resource: T) => Promise<U>) {
    try {
        return await func(resource);
    } finally {
        await resource.dispose();
    }
}