ES6 : Object restructuration for mailchimp api - object

Question

I want to construct a object base on an array and another object.
The goal is to send to mailchimp api my users interests, for that, I've got :
//Array of skills for one user
const skillsUser1 = ["SKILL1", "SKILL3"]
//List of all my skills match to mailchimp interest group
const skillsMailchimpId = {
'SKILL1': 'list_id_1',
'SKILL2': 'list_id_2',
'SKILL3': 'list_id_3',
}
//Mapping of user skill to all skills
const outputSkills = skillsUser1.map((skill) => skillsMailchimpId[skill]);
console.log(outputSkills);
The problem is after, outputSkill get me an array :
["ID1", "ID3"]
But what the mailchimp api need, and so what I need : :
{ "list_id_1": true,
"list_id_2": false, //or empty
"list_id_3" : true
}

Answer 1

A simple way would be this (see comments in code for explanation):
// Array of skills for one user
const skillsUser1 = ["SKILL1", "SKILL3"]
// List of all my skills match to mailchimp interest group
const skillsMailchimpId = {
'SKILL1': 'list_id_1',
'SKILL2': 'list_id_2',
'SKILL3': 'list_id_3',
}
// Create an output object
const outputSkills = {};
// Use `Object.entries` to transform `skillsMailchimpId` to array
Object.entries(skillsMailchimpId)
// Use `.forEach` to add properties to `outputSkills`
.forEach(keyValuePair => {
const [key, val] = keyValuePair;
outputSkills[val] = skillsUser1.includes(key);
});
console.log(outputSkills);
The basic idea is to loop over skillsMailchimpId instead of skillsUser.
But that is not very dynamic. For your production code, you probably want to refactor it to be more flexible.
// Array of skills for one user
const skillsUser1 = ["SKILL1", "SKILL3"]
// List of all my skills match to mailchimp interest group
const skillsMailchimpId = {
'SKILL1': 'list_id_1',
'SKILL2': 'list_id_2',
'SKILL3': 'list_id_3',
}
// Use `Object.entries` to transform `skillsMailchimpId` to array
const skillsMailchimpIdEntries = Object.entries(skillsMailchimpId);
const parseUserSkills = userSkills => {
// Create an output object
const outputSkills = {};
// Use `.forEach` to add properties to `outputSkills`
skillsMailchimpIdEntries.forEach(([key, val]) => {
outputSkills[val] = userSkills.includes(key);
});
return outputSkills;
}
// Now you can use the function with any user
console.log(parseUserSkills(skillsUser1));