使用其他数组元素进行数组解构

Question

I have the following users array:

const usersArray = [ 'A', 'B'];

it could be any length:

const usersArray = [ 'A', 'B', 'C', 'D'];

i am extracting the first two using these variable names: userA and userB. These variable names are known.

const [ userA, userB] = usersArray;

Then i have some unknown user names that i get inside other users array:

const otherUsers = [ 'userC', 'userD', 'userE'];

how can I extract the values from usersArray under the variable names inside otherUsers ? given that i first need to extract the known ones, then other ones.

update:

I can do an unshift for the first two known variables:

otherUsers.unshift('userA', 'userB')

so now all my variables are inside otherUsers . how can I extract them one by one?

Answer 1

just use the rest property:

 const [ userA, userB, ...otherUsers] = usersArray;

Or alternatively use slice :

 const [ userA, userB] = usersArray;
 const otherUsers = usersArray.slice(2);

Answer 2

What you have to do is use eval() .

const usersArray = ['A', 'B', 'C', 'D'];

const otherUsers = ['userC', 'userD', 'userE'];

const allUsers = otherUsers.unshift('userA', 'userB')

let joined = allUsers.join(',');

eval(`let [${joined}] = usersArray`);

now if you run console.log(userA, userB, userC, userD, userE) , you would get the defined variables.

NB because eval in not a good way to evaluate a string of code, you can use window.Function . Just replace the eval call with the Function call like this:

Function(`let [${joined}] = usersArray`)