I am newbie in JS, I will appreciate any help
I have response from server like this:
let arr = [
{
key: "name",
propertyValue: "Test Name",
},
{
key: "middleName",
propertyValue: null,
},
{
key: "university.isGraduated",
propertyValue: true,
},
{
key: "university.speciality",
propertyValue: "Computer Science",
},
{
key: "university.country.code",
propertyValue: "PL"
}];
And I need to convert it to object:
let student = {
name: 'Test Name',
middleName: null,
university: {
isGraduated: true,
speciality: 'Computer Science',
country: {
code: 'PL'
}
}
}
Does anyone have any ideas how to do this?
Please check this out:
const array=[{key:"name",propertyValue:"Test Name"},{key:"middleName",propertyValue:null},{key:"university.isGraduated",propertyValue:!0},{key:"university.speciality",propertyValue:"Computer Science"},{key:"university.country.code",propertyValue:"PL"}];
const student = {};
array.forEach(e => { // loop trought
let obj = student;
e.key.split('.').forEach((a,b,c) => ( // go way trough
(obj[a] = b === c.length - 1 ? e.propertyValue : obj[a] || {}), (obj = obj[a]) // update obj
))
});
console.log(student)Or as "pretty" one-liner:
array.forEach((e, o) => ((o = student), e.key.split('.').forEach((a,b,c) => ((o[a] = b === c.length - 1 ? e.propertyValue : o[a] || {}), (o = o[a])))));
You can use a combination of reduce and split to build up the object.
let arr = [
{
key: "name",
propertyValue: "Test Name",
},
{
key: "middleName",
propertyValue: null,
},
{
key: "university.isGraduated",
propertyValue: true,
},
{
key: "university.speciality",
propertyValue: "Computer Science",
},
{
key: "university.country.code",
propertyValue: "PL"
}];
const result = arr.reduce ( (acc,i) => {
const keys = i.key.split(".");
let pointer = acc;
for(let i=0;i<keys.length-1;i++)
pointer = pointer[keys[i]] || (pointer[keys[i]] = {});
pointer[keys[keys.length-1]] = i.propertyValue;
return acc;
},{});
console.log(result);without nested object this would be simple as that:
arr.reduce((prev, current) => {return prev[current.key] = current.propertyValue}, {})
With your data format I would first do current.key.split('.') and then build the object recursively using the reduce function from above.