module.js

/* jshint esnext:true */

/**
 * Checks if the variable is null or undefined
 * @public
 * @type {Function}
 * @param {Mixed} v The variable to test.
 * @return {Boolean}
 */
export function isNullOrUndefined(v) {
	return typeof v === 'undefined' || v === null;
}

/**
 * Checks if the variable is a string.
 * @public
 * @type {Function}
 * @param {String} s The variable to test.
 * @return {Boolean}
 */
export function isStr(s) {
	return typeof s === 'string';
}

/**
 * Checks if the variable is an array.
 * @public
 * @type {Function}
 * @param {Array} a The variable to test.
 * @return {Boolean}
 */
export function isArr(a) {
	return !isNullOrUndefined(a) && Object.prototype.toString.call(a) === '[object Array]';
}

/**
 * Checks if the variable is a number.
 * @public
 * @type {Function}
 * @param {Number} n The variable to test.
 * @return {Boolean}
 */
export function isNum(n) {
	return typeof n === 'number' && !isNaN(n);
}

/**
 * Checks if the variable is an object.
 * @public
 * @type {Function}
 * @param {Object} o The variable to test.
 * @return {Boolean}
 */
export function isObj(o) {
	return !isArr(o) && typeof obj === 'object';
}

/**
 * Checks if the variable is a function.
 * @public
 * @type {Function}
 * @param {Function} f The variable to test.
 * @return {Boolean}
 */
export function isFnc(f) {
	return typeof f === 'function';
}

/**
 * Checks if the variable is a string and that it's not empty.
 * @public
 * @type {Function}
 * @param {String} s The variable to test.
 * @return {Boolean}
 */
export function validStr(s) {
	return isStr(s) && !!s.length;
}

/**
 * Checks if the variable is an array and that it's not empty. Only goes one level deep.
 * @public
 * @type {Function}
 * @param {Array} a The variable to test.
 * @return {Boolean}
 */
export function validArr(a) {
	return isArr(a) && !!a.length;
}

/**
 * Checks if the variable is a number and that is greater than 0.
 * @public
 * @type {Function}
 * @param {Number} n The variable to test.
 * @return {Boolean}
 */
export function validNum(n) {
	return isNum(n) && n > 0;
}

/**
 * Checks if the variable is an object and that it's not an empty object.
 * @public
 * @type {Function}
 * @param {Object} o The variable to test.
 * @return {Boolean}
 */
export function validObj(o) {
	var i;

	if (isObj(o)) {
		for (i in o) {
			return true;
		}
	}

	return false;
}