How to use the differenceWith function from ramda

Find comprehensive JavaScript ramda.differenceWith code examples handpicked from public code repositorys.

content-test.es

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// To get a sane error message, only show a few examples.
// Otherwise, it difficult to interpret the error messages.
const numExamples = 4;
const unexpectedAds = R.differenceWith(R.equals, foundAds, expectedAds);
const missingAds = R.differenceWith(R.equals, expectedAds, foundAds);
if (unexpectedAds.length > 0 || missingAds.length > 0) {
  // uncomment to export expectations:
  // fs.writeFileSync('/tmp/failing-test-expected-ads.json', JSON.stringify(foundAds));

OrderJobService.js

GitHub: waltermitch/Trukt-Backend

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// I compare both arrays and create an array of bad guids, then attach an error message
// so the errors can be properly thrown.
if (jobGuids.length != goodGuids.length)
{
    const comp = (x, y) => x === y.guid;
    const badGuids = R.differenceWith(comp, jobGuids, goodGuids);
    const jobsDontExists = badGuids.map((guid) =>
    {
        return { guid: guid, status: 404, errors: [`The job with guid ${guid} doesn't exist.`] };
    });

index.js

GitHub: bcrabbe/leetcode

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  const notOptions = {
    ...rows[i],
    ...columns[j],
    ...squares[squareIndex(j, i)],
  }
  return R.differenceWith((a, b) => a == b)(R.range(1, 10), Object.keys(notOptions))
}


const solveSudoku = (board) => {
  const solvingBoard = R.clone(board)

cyclejs-audio-driver.js

GitHub: jemmyw/cyclejs-audio-driver

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 * @example
 *
 *      var cmp = (x, y) => x.a === y.a;
 *      var l1 = [{a: 1}, {a: 2}, {a: 3}];
 *      var l2 = [{a: 3}, {a: 4}];
 *      R.differenceWith(cmp, l1, l2); //=> [{a: 1}, {a: 2}]
 */
var differenceWith = _curry3(function differenceWith(pred, first, second) {
    var out = [];
    var idx = 0;

+ 17 other calls in file

domain-service.js

GitHub: MatchBox-ID/matchstore.is-a.dev

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const diffRecords = (oldRecords, newRecords) => {
  const isMatchingRecord = (a, b) => getHostKey(a) === getHostKey(b);


  const remove = R.differenceWith(isMatchingRecord, oldRecords, newRecords);
  const add = R.differenceWith(isMatchingRecord, newRecords, oldRecords)
    .filter(r => !['www'].includes(r.name));


  return { add, remove };
};

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