help2005

It's UWAweek 17 (1st semester, week 8)

help2005

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UWA week 17 (1st semester, week 8) ↓

assessed lab contains() - what is this for? (both)

3:53pm Tue 23rd Apr, Andrew G.

ANONYMOUS wrote:

> None of the subclasses we are required to write ask us to make use of this abstract method. > Are we just supposed to ignore it? > What is its purpose?

The lab worksheet instructs you to implement subclasses of the `SetExpression` abstract class. This requires you to implement the `contains` method. The worksheet and the comment on the `contains(elem)` method also explain that it "Evaluates if the set resulting from the expression contains elem". You are expected to implement `contains()` correctly such that it has the required behaviour. The tests verify that your implementation of `contains` behaves correctly for simple examples. I hope that helps. All the information you need should be in the worksheet.

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