iter-tools-es/impls/$interpose-seq/async-interpose-seq.js

The iterable toolbox

const {
  asyncIterableCurry,
  asyncCache
} = require('../../internal/async-iterable.js');

async function* __asyncInterposeSeq(source, seq) {
  const subseq_ = await asyncCache(seq);
  let first = true;

  for await (const sourceValue of source) {
    if (!first) yield* subseq_;
    yield sourceValue;
    first = false;
  }
}

exports.__asyncInterposeSeq = __asyncInterposeSeq;
const asyncInterposeSeq = /*#__PURE__*/asyncIterableCurry(__asyncInterposeSeq);
exports.asyncInterposeSeq = asyncInterposeSeq;