Remove assignments to Parameters
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Java uses pass by value exclusively. | Java uses pass by value exclusively. | ||
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[http://sourcemaking.com/refactoring/remove-assignments-to-parameters sourcemaking.com] | [http://sourcemaking.com/refactoring/remove-assignments-to-parameters sourcemaking.com] | ||
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Latest revision as of 03:22, 25 November 2010
The code assigns to a parameter.
int discount (int inputVal, int quantity, int yearToDate) {
if (inputVal > 50) inputVal -= 2;
...
}
Use a temporary variable instead.
int discount (int inputVal, int quantity, int yearToDate) {
int result = inputVal;
if (inputVal > 50) result -= 2;
...
}
The main reason for removing assignments to parameters is due to lack of clarity and to confusion between pass by value and pass by reference. Java uses pass by value exclusively.
