Converting an array to an object with values in JavaScript

Question

Can someone help me with converting an array to an object in JavaScript? I want to set each value to "true".

The initial array is:

['lastName', 'firstName', 'email']

I need it transformed to:

{lastName: true, firstName: true, email: true}

Thank you for any assistance!

Answer 1

Answer №1

This scenario lends itself well to utilizing the Object.fromEntries method:

const properties = ['city', 'state', 'zipCode'];
const details = Object.fromEntries(properties.map(prop => [prop, false]));

console.log(details);

Answer 2

This scenario lends itself well to utilizing the Object.fromEntries method:

const properties = ['city', 'state', 'zipCode'];
const details = Object.fromEntries(properties.map(prop => [prop, false]));

console.log(details);

Answer 3

One way to approach this task is as follows:

let items = ['category', 'quantity', 'price'];
let cart = {};
items.forEach((item) => cart[item] = true);

Answer 4

One way to approach this task is as follows:

let items = ['category', 'quantity', 'price'];
let cart = {};
items.forEach((item) => cart[item] = true);

Answer 5

Loop through the array and set true as the value, using the elements as keys:

let newObject = {};
for (var j = 0; j < newArray.length; ++j) {
    let item = newArray[j];
    newObject[item] = true;
}
return newObject;

Answer 6

Loop through the array and set true as the value, using the elements as keys:

let newObject = {};
for (var j = 0; j < newArray.length; ++j) {
    let item = newArray[j];
    newObject[item] = true;
}
return newObject;

Answer 7

To understand how the reduce() function works, check out the documentation here. For example:

const items = ['banana', 'apple', 'orange']

const result = items.reduce((acc, curr) => ({ ...acc, [curr]: true}), {}) 

console.log(result)

Answer 8

To understand how the reduce() function works, check out the documentation here. For example:

const items = ['banana', 'apple', 'orange']

const result = items.reduce((acc, curr) => ({ ...acc, [curr]: true}), {}) 

console.log(result)

Answer 9

let person = {}
let details = ['lastName', 'firstName', 'email']
    
details.forEach(function(item){
    person[item] = true
})

Answer 10

let person = {}
let details = ['lastName', 'firstName', 'email']
    
details.forEach(function(item){
    person[item] = true
})