Yamyam: 1版をインポートしました

2018-06-28T17:47:41Z

1版をインポートしました

2010年4月3日 (土) 10:56にwiki>Terrywallworkによる

2010-04-03T10:56:25Z

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The template-class std::vector can be great in simplifying and standardizing storage classes across programs, but a lot of caution needs to be taken when using it. Please follow these guidelines to make clean, efficient and bugless code:

==The following code can cause exceptions to be thrown:==

<source lang="cpp">&( vector::iterator::end() )</source>
** This is illegal because you are trying to dereference a null pointer. One common error for new programmers is to assume that '''end()''' returns the last pointer in the sequence. However, it doesn't. It returns the last pointer in the sequence plus one ( + 1 ). To dereference the last pointer of the sequence, use this instead:

<source lang="cpp">&( (vector::iterator::end() - 1) )</source>

<source lang="cpp">vector::iterator::erase()</source>

** This is ok, except it often causes issues when used in an iteration sequence or for loop. The reason for this is because '''erase()''' not only clears the value at the current location, but it also deletes the pointer to the value. In an iteration sequence, the program then tries to increment a null pointer, throwing an exception. Instead, use this code:

<source lang="cpp">vector::iterator::clear()</source>

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Dev:Source/Architecture/Vector Usage - 版の履歴

Yamyam: 1版 をインポートしました

2010年4月3日 (土) 10:56にwiki>Terrywallworkによる

Yamyam: 1版をインポートしました