@effect-ts/system/_mjs/Experimental/Stream/_internal/api/zipWithPrevious.mjs

Effect-TS is a zero dependency set of libraries to write highly productive, purely functional TypeScript at scale.

// ets_tracing: off
import * as Tp from "../../../../Collections/Immutable/Tuple/index.mjs";
import * as O from "../../../../Option/index.mjs";
import * as MapAccum from "./mapAccum.mjs";
/**
 * Zips each element with the previous element. Initially accompanied by `None`.
 */

export function zipWithPrevious(self) {
  return MapAccum.mapAccum_(self, O.emptyOf(), (prev, next) => Tp.tuple(O.some(next), Tp.tuple(prev, next)));
}
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