...中，Adapter有许多不同类型的改变时（同时包含若干数量的remove，add，modify，insert等改变），将会有许多边界情况（edge case）出现。另外，对于一个复杂的LayoutManager，计算一个item将会被放在什么地方并不是一件轻松的事（如StaggeredGridLayout）。
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当然，这里有一些边缘情况(edge case):
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以上来源于: WordNet
What's an edge case?
什么是边界情况呢？
youdao
Listing 5. Another edge case verified with ease!
清单5 .轻松验证另一个极端例子！
That's extreme edge case and probably very hard to test. So leave it. QA agrees.
这是一个相当极端的方式，非常难测试，所以先不要管这个。
One such edge case was Fighting is Magic, a fan-made 2D beat-em-up in the style of Street Fighter using the cast of Friendship is Magic.
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Even though our initial analysis pointed to this being an edge case and not a widespread problem in our search results, we immediately convened a team that looked carefully at the issue.
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Make sure that the edge of the case around the screen is higher than the screen.
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