How to concatenate two array by using two request in javascript with mailchimp?

Question

The title may not very clear. I'm gonna explain my problem.

Here is my code:

mailchimpMarketing = require("@mailchimp/mailchimp_marketing");

mailchimpMarketing.setConfig({
apiKey: "MY API KEY",
server: "MY SERVER",
});

const getEmailMembersFromList = async (listID, offset , count) => {
  const response = await mailchimpMarketing.lists.getListMembersInfo(listID, {offset, count});
    emails = response.members.map(member => {
      return member.email_address
    })
  console.log(emails)
}

getEmailMembersFromList("MY LIST ID", 0, 1000)
getEmailMembersFromList("MY LIST ID", 1000, 58)

It display in the terminal two arrays of emails addresses. I have to make two calls because there is more than 1000 emails addresses (1058 in total) and the maximum is 1000.

Now I want to concatenate those two array, maybe with the .concat() method but I don't know how to do it in my case.

EDIT 1

mailchimpMarketing = require("@mailchimp/mailchimp_marketing");

mailchimpMarketing.setConfig({
apiKey: "MY API KEY",
server: "MY SERVER",
});

const getEmailMembersFromList = async (listID, offset , count) => {
  const response = await mailchimpMarketing.lists.getListMembersInfo(listID, {offset, count});
    emails = response.members.map(member => {
      return member.email_address
    })
  //console.log(emails)
  return emails
}

getEmailMembersFromList("MY LIST ID", 0, 1000)
getEmailMembersFromList("MY LIST ID", 1000, 58)

have you tried => let list = getEmailMembersFromList("MY LIST ID", 0, 1000); list.concat(getEmailMembersFromList("MY LIST ID", 0, 1000)); — Ketan Ramteke, Oct 13 '20 at 14:47
Yes and it said that .concat is not a function. That's strange — Samy Rharade, Oct 13 '20 at 15:02

Ketan Ramteke · Accepted Answer · 2020-10-13T15:37:29.240

1

Try this code:

let result = [];

const getEmailMembersFromList = async (listID, offset, count) => {
  await mailchimpMarketing.lists
    .getListMembersInfo(listID, { offset, count })
    .then((response) => {
      emails = response.members.map((member) => {
        return member.email_address;
      });
      // try using spread operator, hopefully it should work
      result = [...result, ...emails];
    });
};

getEmailMembersFromList("MY LIST ID", 0, 1000);
getEmailMembersFromList("MY LIST ID", 1000, 58);

console.log(result);

edited Oct 13 '20 at 15:37

answered Oct 13 '20 at 15:23

Ketan Ramteke

10,183
2
21
41

Same as Reyno answer, it work because it put my two array in an other array but I want my two array to merge in one. This code give me this [ [dataOfFirstRequest] [dataOfSecondRequest] ] and I want this [ dataOfFirstRequest, dataOfSecondRequest ] – Samy Rharade Oct 13 '20 at 15:28
something like this: [[1,2,3,4], [5,6,7,8]] ? – Ketan Ramteke Oct 13 '20 at 15:31
Yes that's what I get when I use your code and I want something like this: [1, 2, 3, 4, 5, 6, 7, 8] – Samy Rharade Oct 13 '20 at 15:34
you can use flat method for that. like : let a = [[1,2,3,4][5,6,7,8]].flat() it will return [1,2,3,4,5,6,7,8] – Ketan Ramteke Oct 13 '20 at 15:36
you can also use the spread operator for that, I have updated the answer, please check if it works. – Ketan Ramteke Oct 13 '20 at 15:38
It doesn't work, it said that .flat is not a function – Samy Rharade Oct 13 '20 at 15:38
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/222973/discussion-between-ketan-ramteke-and-samyrharade). – Ketan Ramteke Oct 13 '20 at 15:38
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/222976/discussion-between-ketan-ramteke-and-samy-rharade). – Ketan Ramteke Oct 13 '20 at 17:13

score 0 · Answer 2 · answered Oct 13 '20 at 14:49

0

Since async functions always return a promise you could add all requests into an array and use Promise.all() to get all the data.

FYI: you are not returning anything from your getEmailMembersFromList function which is necessary to get it to work.

Example:

const firstGroup = getEmailMembersFromList("MY LIST ID", 0, 1000);
const secondGroup = getEmailMembersFromList("MY LIST ID", 1000, 58);

Promise.all([firstGroup, secondGroup]).then((values) => {
  console.log(values);
});

answered Oct 13 '20 at 14:49

Reyno

6,119
18
27

Ok but it display one array with my two array inside and I just want one array with all of my emails addresses inside – Samy Rharade Oct 13 '20 at 14:59
But now I put a return in my getEmailMembersFromList function, I'm gonna edit my post – Samy Rharade Oct 13 '20 at 15:00
Why I can't do finalGroup = firstGroup.concat(secondGroup) ? – Samy Rharade Oct 13 '20 at 15:03

How to concatenate two array by using two request in javascript with mailchimp?

2 Answers2