type javascript object

typeobj.js

'use strict';

var getType = function (obj) {
    return Object.prototype.toString.call(obj).match(/\[object (\w+)\]/)[1];
};
isString = function () {
    return getType(this) === 'String';
};
isArray = function () {
    return getType(this) === 'Array';
};
isObject = function () {
    return getType(this) === 'Object';
};
isFunction = function () {
    return getType(this) === 'Function';
};
isNumber = function () {
    return getType(this) === 'Number';
};
isRegExp = function () {
    return getType(this) === 'RegExp';
};
isUndefined = function () {
    return getType(this) === 'Undefined';
};
isNull = function () {
    return getType(this) === 'Null';
};
isBoolean = function () {
    return getType(this) === 'Boolean';
};