How To Convert Array To A Mathematical Computation Expression?

I tried to write a computation mathematical expression and store each sign into an array. For example, I want to convert the array: let arr = ['10', '-', '(', '2', '+', '1', ')', '

Solution 1:

It will not validate your input but eval(arr.join("")) will do it. eval takes a string and executes it as it were a js expression.

Solution 2:

It work only with eval,

new Function is not working for this issue

const arr = ['10', '-', '(', '2', '+', '1', ')', '*', '3'];

eval(arr.join(' ')); // 1