I have an array of elements. How to perform mathematical operations?

Question

JavaScript

There is an array of type elems = ["12","+","4", "*", "2", "/", "34"].
How to bring it to the form res = 12 + 4 * 2 / 34 ?

Answer 1

Same thing, but without eval.

function numToFn(fn) {
  return new Function('return ' + fn)();
}
elems = ["12","+","4", "*", "2", "/", "34"];

console.log( elems.join('') + ' = ' +  numToFn(elems.join('')) );