Countries-API/dataForFilters.js at main · Stefanacef/Countries-API · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
const region = (countries) => {
  return [...new Set(countries.map((el) => el.region))];
};
const timeZone = (countries) => {
  return [
    ...new Set(
      countries
        .map((el) => el.timezones)
        .flat(1)
        .sort()
    ),
  ];
};
const language = (countries) => {
  return [
    ...new Set(
      countries
        .map((el) => {
          if (el.languages == null) return {};
          else return Object.values(el.languages);
        })
        .flat(1)
        .sort()
    ),
  ];
};

const currencies = (countries) => {
  return [
    ...new Set(
      countries
        .map((el) => {
          if (el.currencies == null) return {};
          else return Object.keys(el.currencies);
        })
        .flat(1)
    ),
  ].sort();
};

export { region, language, timeZone, currencies };