beeblebrox3 / star

    /**

     * Get element from obj by string path

     * Example:

     * Given the object let a = {a: {b: 1}}

     * When you do getFlattened("a.b", a)

     * Then you get the number 1.

     * @param {string} path specify the key of the object you want

     * @param {Object} obj reference object

     * @param {any} defaultValue value to return if key was not found. Default is null

     * @return {any}

     */

    /**

     * @see getFlattened

     * Similar to getFlattened, but it set the value instead of return it.

     * Example:

     * Given the object let b = {a: {b: 1}}

     * When you do setFlattened("a.b", 2)

     * Then you get {a: {b: 2}}

     * @param {String} path

     * @param {*} newValue

     * @param {Object} obj

     * @returns {*}

     */

    setFlattened: function (path, newValue, obj) {

        "use strict";

        const explodedPath = path.split(".");

        const laps = explodedPath.length - 1;

        let i;

        let temp = obj;

        for (i = 0; i < laps; i += 1) {

            temp = temp[explodedPath[i]];

        }

        temp[explodedPath[laps]] = newValue;

        return obj;

    },

    /**

     * Get first key of an object or null if it doesn't have keys

     * @param {Object} obj

     * @returns {*}

     */

    firstKey: function (obj) {

        "use strict";

        if (obj instanceof Object === false) {

            throw "obj must be an Object";

        }

        return Object.keys(obj)[0] || null;

    }

}