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C++程序设计语言(第4部分:标准库)(原书第4版)
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C++程序设计语言(第4部分:标准库)(原书第4版)

by 本贾尼 斯特劳斯特鲁普
August 2021
Intermediate to advanced
450 pages
6h 57m
Chinese
Pearson
Content preview from C++程序设计语言(第4部分:标准库)(原书第4版)

31.6 建议

[1]一个STL容器定义一个序列;31.2节。

[2]将vector作为默认容器使用;31.1节。

[3]insert()和push_back()这样的插入操作在vector上通常比在list上更高效;31.2节和31.4.1.1节。

[4]将forward_list用于通常为空的序列;31.2节和31.4.2节。

[5]当涉及性能时,不要盲目信任你的直觉,而要进行测试;31.3节。

[6]不要盲目信任渐进复杂性度量;某些序列很短而单一操作的代价差异可能很大;31.3节。

[7]STL容器都是资源句柄;31.2.1节。

[8]map通常实现为红黑树;31.2.1节和31.4.3节。

[9]unordered_map是哈希表;31.2.1节和31.4.3.2节。

[10]STL容器的元素类型必须提供拷贝和移动操作;31.2.2节。

[11]如果你希望保持多态行为,使用指针或智能指针的容器;31.2.2节。

[12]比较操作应该实现一个严格弱序;31.2.2.1节。

[13]以传引用方式传递容器参数,以传值方式返回容器;31.3.2节。

[14]对一个容器,用()初始化器语法初始化大小,用{}初始化器语法初始化元素列表;31.3.2节。

[15]用范围for循环或首尾迭代器对容器进行简单遍历;31.3.4节。

[16]如果不需要修改容器元素,使用const迭代器;31.3.4节。

[17]当使用迭代器时,用auto避免冗长易错的输入;31.3.4节。

[18]用reserve()避免指向容器元素的指针和迭代器失效;31.3.3节和31.4.1节。

[19]未经过测试不要假定reserve()会有性能收益;31.3.3节。

[20]使用容器上的push_back()或resize(),而不是数组上的realloc();31.3.3节和31.4.1.1节。 ...

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Publisher Resources

ISBN: 9787111544395