JS Filter function to remove items in array between two ID's in object

Question

I have a start ID, an end ID and an array of objects like this:

var items = [
    {"id":1590464645},
    {"id":1588963781},
    {"id":1587985477},
    {"id":1587986221},
    {"id":1625467428}
],
start_id = 1588963781,
end_id = 1587986221;

I would like to filter the array so the id in the array that matches the start_id, the id that matches the end_id and all elements in between are removed from the array. In this example only the first and last elements should remain in the filtered array.

items = items.filter(function (el) {
  // filter array
});

Answer 1

You'll need a variable outside of the filter() function to keep track of whether or not you're "in" the unwanted group:

var items = [
      {"id" : 1590464645},
      {"id" : 1588963781},
      {"id" : 1587985477},
      {"id" : 1587986221},
      {"id" : 1625467428}
    ],
    start_id = 1588963781,
    end_id = 1587986221,
    inBetween = false;
 
items = items.filter(function (el) {
  if (el.id == start_id)
    {
      inBetween = true;
      return false;
    }
  else if (el.id == end_id)
    {
      inBetween = false;
      return false;
    }
  else
    return ! inBetween;
});

console.log(items);