iter-tools-es/impls/$split-when/async-split-when.js

The iterable toolbox

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

const {
  __asyncSpliterate
} = require('../$spliterate/async-spliterate.js');

async function* asyncPredicateSpliterator(split, {
  predicate
}, source) {
  let i = 0;

  for await (const value of source) {
    yield (await predicate(value, i++)) ? split : value;
  }
}

function __asyncSplitWhen(source, predicate) {
  return __asyncSpliterate(source, asyncPredicateSpliterator, {
    predicate
  });
}

exports.__asyncSplitWhen = __asyncSplitWhen;
const asyncSplitWhen = /*#__PURE__*/asyncIterableCurry(__asyncSplitWhen);
exports.asyncSplitWhen = asyncSplitWhen;