Checking Object Types

It is often useful to determine whether an object you have gotten back from a command is of a certain type. You can do this in a couple different ways. For example, one way is to use the isinstanceof operator, which compares the object types and returns true or false. For example:

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([1,2,3] instance of Array) //true

The util module also provides the isArray(object), isRegExp(object), isDate(object), and isError(object) convenience methods to determine whether an object is an Array, RexExp, Date, or Error object. For example:

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(util.isArray([1,2,3]) //true.