iter-tools-es/impls/$collate/collate.js

The iterable toolbox

const {
  iterableCurry
} = require('../../internal/iterable.js');

const {
  __interleave
} = require('../$interleave/interleave.js');

function* byComparison({
  compare
}, all, ...peekrs) {
  let candidate;

  while (!all.done) {
    candidate = all.value;

    for (const peekr of peekrs) {
      if (!peekr.done && compare(peekr.value, candidate.value) < 0) {
        candidate = peekr;
      }
    }

    yield candidate.value;
    candidate.advance();
  }
}

function __collate(sources, compare) {
  return __interleave(sources, byComparison, {
    compare
  });
}

exports.__collate = __collate;
const collate = /*#__PURE__*/iterableCurry(__collate, {
  variadic: true
});
exports.collate = collate;