javascript remove item from array, if an item already existing in array

Question

following adds items to array:

var arrayOptions = [];

function AddToFilterOptionList(mode) {
    arrayOptions.push(mode);
    }

remove item fr

Answer 1

This will work assuming the 'this+that' pattern is consistent, and that we only care about the starting item.

http://jsbin.com/gefasuqinu/1/edit?js,console

var arr = [];

function remove(item) {
  var f = item.split('+')[0];

  for (var i = 0, e = arr.length; i < e; i++) {
    if (arr[i].split('+')[0] === f) {
      arr.splice(i, 1);
      break;
    }
  }
}

function add(item) {
  remove(item);
  arr.push(item);
}