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- 'use strict';
-
- module.exports = {
- isString: function(arg) {
- return typeof(arg) === 'string';
- },
- isObject: function(arg) {
- return typeof(arg) === 'object' && arg !== null;
- },
- isNull: function(arg) {
- return arg === null;
- },
- isNullOrUndefined: function(arg) {
- return arg == null;
- }
- };
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