Get the index of an object in an array, based on the value of a certain key

get-index-by-key-value.js

/**
 * Function to Search an Array of Objects
 * @param arr --- What array you're searching in
 * @param key --- What key you should be looking at in each object
 * @param val --- What value you're looking for
 * @returns {*} - Returns you the found object that has the matching key or null if not found
 */
function getArrIndexByKeyValue(arr, key, val) {
    for (var i = 0; i < arr.length; i++) {
        if (arr[i][key] == val) {
            return i;
        }
    }
    return null;
}