How to check if a selected number is in an array?

Question

I want to place markers on a google map with filtering. If the filter only needs to check a single value, my code will work fine. However, if I want to check if the value returned by the filter is in that array, then unfortunately the code doesn't work.

Here is my code:

https://jsfiddle.net/7o8w2eaq/

So the code snippet I would like help with:

filterMarkersEres = function (eres) {
  for (i = 0; i < gmarkers1.length; i++) {
    marker = gmarkers1[i];
    var ereshonap = marker.eres;
    let igaze = ereshonap.includes(eres);
    //ereshonap.includes(eres);
    console.log(igaze);

    // If is same category or category not picked
    if (ereshonap.includes(eres) || eres.length === 0) {
      //
      marker.setVisible(true);
    }
    // Categories don't match
    else {
      marker.setVisible(false);
    }
  }
};

So I want to make the ripening time filter work for several months. I think I should somehow check if "marker.eres" contains the value of the selected month, but I can't figure out how.So I want to ask for help with this.

I hope I have said it clearly, thank you in advance!

Answer 1

Thanks it already works based on the comments!

As pointed out by @GrafiCode, the ereshonap array contained numbers, while eres was a string. Therefore, I needed to convert the string to an integer using parseInt(eres) before checking if it was in the array.

filterMarkersEres = function (eres) {
  for (i = 0; i < gmarkers1.length; i++) {
    marker = gmarkers1[i];
    var ereshonap = marker.eres;

    // If is same category or category not picked
    if (ereshonap.includes(parseInt(eres)) || eres.length === 0) {
      marker.setVisible(true);
    } else { // Categories don't match
      marker.setVisible(false);
    }
  }
}

Answer 2

Use the console.log(variable.isArray()); if true then its and array else if false then non array