add

function Dsp.add(disposer: Dsp, value: (() => void) | Dsp): DspLink | undefined;

Takes a Dsp instance and attaches a callback or another Dsp.

Returns a data-structure that can be passed to unlink for fast O(1) removals.

Returns undefined if:

The target Dsp has already been disposed
The provided Dsp has already been disposed
The target Dsp is equal to the provided Dsp

If the target Dsp is already disposed, the provided value will be immediately disposed if possible.

import { Dsp } from "@monstermann/dsp";

const dspA = Dsp.create();
const dspB = Dsp.create();

Dsp.add(dspA, () => console.log(1));
Dsp.add(dspB, () => console.log(2));
Dsp.add(dspA, dspB);

Dsp.dispose(dspA); // Prints: 2, 1

Dsp.add(dspA, () => console.log(3)); // Prints: 3
Dsp.add(dspB, () => console.log(4)); // Prints: 4

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