@klodianimeri/pipejs/dist/pipes/difference.js

Pipe functions that provide convenient and efficient ways to work with iterators.

import { assertSync } from "../util/index.js";
export function difference(source) {
    assertSync(source);
    return () => {
        let sourceSet = source instanceof Set ? source : new Set(source);
        return (result) => {
            if (result === null || result === void 0 ? void 0 : result.done) {
                return result;
            }
            if (!sourceSet.has(result.value)) {
                sourceSet.add(result.value);
                return result;
            }
        };
    };
}
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