u want to minimize duplication as much as you can. Duplication of both data and code files is dangerous because it’s easy to lose track of modifications you have made to a file saved in one place but not in the other place. As you keep making changes, the two files will have the same name but different content, which generates confusion. Duplication is also inefficient because it occupies precious space on your computer.</p>
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<div id="self-containedness" class="section level3 hasAnchor" number="1.1.