How to get the difference of two string arrays?

Question

I want to get the exact difference between two string arrays.

const array1 = [\'T\',\'E\',\'A\',\'P\',\'A\',\'P\',\'E\',\'R\'];
const array2 = [\'T\',\'A\',\         


        

Answer 1

You could remove elements from allowed based on the input array:

 const allowed = ['T','E','A','P','A','P','E','R'];
 const input = ['T','A','P'];

 for(const char of input) {
   const pos = allowed.indexOf(char);
   if(pos === -1) {
     // char doesnt exist?
   } else {
     allowed.splice(pos, 1);
   }
 }

Then allowed will be your expected result at the end.