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Consider the convertToCaloriesWith: method, as defined in
Segment 121, for example. When the
convertToCaloriesWith: method is called, any existing values for
other parameters that happen to be named caloriesPerGram are protected:
convertToCaloriesWith: fence------* The values of caloriesPerGram | The value of caloriesPerGram | outside the fence, if any, | inside the fence is isolated | are isolated from the value | from values outside | inside | | | The Method computes the value | | of self * caloriesPerGram using | | the value of caloriesPerGram | | inside this fence | *---------------------------------*