JSFiddle - React, Tailwind, and code Playground

JavaScript

Array.prototype.indexOfId = function (id) {
            for (var i = 0; i < this.length; i++)
                if (this[i].id === id)
                    return i;
            return -1;
        }

        var arrayName = [
          { id: "a", gender: "man", item: "stuff" },
          { id: "b", gender: "woman", item: "stuff" },
          { id: "c", gender: "man", item: "stuff" },
          { id: "d", gender: "man", item: "stuff" }];

        var position = arrayName.indexOfId("b");

        alert(position);