Selecting elements with lodash where inner properties match values in an array

问题

I currently have the following and want to know if there is a cleaner way to do it since I do not like the inclusion of the flag.

const countries = [...];
const religionFilter = [ "religA", "religB" ];
const religionFilteredCountries = [];

_.forEach(countries,
    c => {
        let flag = false;

        _.forEach(c.info, i => {
            if (_.includes(religionFilter, i.religions)) {
                flag = true;
            }
        });
        if (flag) {
            religionFilteredCountries.push(c);
        }
    }
);

Here is a jsfiddle.

---

Here is the updated jsfiddle.

回答1:

Since you're already using lodash, you can write religionFilteredCountries like this:

const religionFilteredCountries =
  countries.filter((c) => _.intersection(religionFilter, c.religions).length > 0);

来源：https://stackoverflow.com/questions/49076600/selecting-elements-with-lodash-where-inner-properties-match-values-in-an-array