filter()

Pass through upstream values that satisfy a predicate.

Import

import { filter } from "@graphrefly/ts/operators";

Signature

function filter(pred: (v: S) => boolean): Operator<S, S>

Parameters

Parameter	Type	Description
pred	(v: S) => boolean	Predicate evaluated for each upstream DATA value.

Returns

An operator that emits matching values and stays quiet for non-matches.

Example

import { graph } from "@graphrefly/ts/graph";
import { filter } from "@graphrefly/ts/operators";

const g = graph();
const count = g.state(0);
const even = g.initNode(filter((value: number) => value % 2 === 0), [count]);

Source

packages/ts/src/graph/operators.ts