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CISC 323 Intro to Software Engineering

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Problems with Changing<br />

Implementations<br />

• Problem: If we change from the<br />

Vec<strong>to</strong>rBookList <strong>to</strong><br />

SortingVec<strong>to</strong>rBookList<br />

implementation, need <strong>to</strong> ensure<br />

that wherever we create a book list,<br />

we replace “new<br />

Vec<strong>to</strong>rBookList()” with “new<br />

SortingVec<strong>to</strong>rBookList()”<br />

• This could be a large change<br />

– What if source <strong>to</strong> classes creating<br />

book lists is not available?<br />

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