gistfile1.js

/**
 * @file Functions relating to type validation.
 */

module.exports = function(_){

    /**
     * Check if value is an object, if not return an empty object
     *
     * @param {Object} obj
     * @returns {Object}
     */

    _.Object = function(obj){
        return _.isObject(obj) ? obj : {};
    };

    /**
     * Check if value is an array, if not return an empty array
     *
     * @param {Array} arr
     * @returns {Array}
     */

    _.Array = function(arr){
        return _.isArray(arr) ? arr : [];
    };

    /**
     * Check if value is a string, if not return an empty string
     *
     * @param {String} str
     * @returns {String}
     */

    _.String = function(str){
        return String(str) || "";
    };

    /**
     * Check if value is a number, if not then return `0`
     *
     * @param {Number} num
     * @returns {Number}
     */

    _.Number = function(num){
        return Number(num) || 0;
    };

    /**
     * Check if value is boolean, if not return `true`
     *
     * @param {Boolean} bool
     * @returns {Boolean}
     */

    _.Boolean = function(bool){
        return _.isBoolean(bool) ? bool : true;
    };

    /**
     * Description
     *
     * @param {Function} fn
     * @returns {Function}
     */

    _.Function = function(fn){
        return _.isFunction(fn) ? fn : Function();
    };
};