How to check if value exists in this JavaScript array?

Question

I have a JavaScript array, where each new item added to the array gets the next incremental number. An example would be as follows (I hope Im writing this correctly):

<

Answer 1

function IsIdInArray(array, id) {
  for (var i = 0; i < array.length; i++) {
    if (array[i].id === id)
      return true;
  }
  return false;
}

var result = IsIdInArray(ArrayofPeople, 820);