ts.js

var invalidChar = 'b';
var arr = [ 'a', 'b', 'b', 'd', 'e' ];
var ptr = 0, n = arr.Length;
for (int i = 0; i < N; i++){
    if (arr[i] != invalidChar) {
      arr[ptr] = arr[i];
      ptr++;
   }
 }