function rand2( len, options ) {
			if ( arguments.length < 2 ) {
				return random.generate( len );
			}
			return random.generate( len, options );
		}
Returns an array of pseudorandom values drawn from a PRNG.

@private
@param {NonNegativeInteger} len - output array length
@param {Options} [options] - function options
@param {string} [options.dtype] - output array data type
@throws {TypeError} first argument must be a nonnegative integer
@throws {TypeError} options argument must be an object
@throws {TypeError} must provide valid options
@returns {Collection} output array