function batchSetValue(variablesAndValues) {
	  variablesAndValues.forEach(function (variableAndValue) {
	    var variable = variableAndValue[0];
	    variable.write(variableAndValue[1]);
	  });
	}
Update the value of multiple Variables at once.

@param variablesAndValues An `Array`, each element is of type
  [Variable, Tensor]. The first item is the
  `Variable` of which the value is to be updated. The second item
  carries the new value.