Effective C++/More Effective C++的作者Scott Meyers即将推出最新力作:Effective STL, 该书目前已经完成,相信不久可以问世。但是与中国读者见面恐怕还是要在苦等之后。Addison=Wesley已经刊出了此书的页面。地址http://cseng.aw.com/book/toc/0,3830,0201749629,00.html
下面是该书的内容:
某些条款我基本可以理解,大部分知道应该如此,但不知其所以然,某些条款令我相当诧异,所以更希望能够早日拜读。我对于某些条款的感想用[]写在下面,我相信也是Meyers书中能够解释的东西。如果对于STL感兴趣的网友能够就这些条款展开讨论,我相信是非常有帮助的。
1. Containers
Item 1: Choose your containers with care.
Item 2: Beware the illusion of container-independent code.
[值得注意的条款!]
Item 3: Make copying cheap and correct for objects in containers.
[可以理解,可是如何做到cheap,哪些情况下容易作出不正确的copy操作?]
Item 4: Call empty instead of checking size against zero.
[何故?]
Item 5: Prefer range member functions to their single-element counterparts.
[何故?]
Item 6: Be alert for C++'s most vexing parse.
[谈何容易!]
Item 7: When using containers of newed pointers, remember to delete the pointers before the container is destroyed.
[可以理解]
Item 8: Never create containers of auto_ptrs.
[可以理解]
Item 9: Choose carefully among erasing options.
[非常令我感兴趣的条款]
Item 10: Be aware of allocator conventions and restrictions.
[好深入的话题!]
Item 11: Understand the legitimate uses of custom allocators.
[怎么做?我略知一二,希望强化这方面的知识]
Item 12: Have realistic expectations about the thread safety of STL containers.
[呵呵,重要条款]
2. Vector and string.
Item 13: Prefer vector and string to dynamically allocated arrays.
[对了,basic_string本身就是一个动态数组容器,大家别以为只有vector]
Item 14: Use reserve to avoid unnecessary reallocations.
[太对了,vector一旦发现容量(capacity)不足,会以惊人的魄力re-allocate,
要当心,不然很惨]
Item 15: Be aware of variations in string implementations.
[愿洗耳恭听]
Item 16: Know how to pass vector and string data to legacy APIs.
[Viva! I know a little bit about that..., but wait a minute, 根据我看
Effective C++的经验,千万别以为你知道不少,Meyers会狠狠教训你,让你知道
什么叫做井观天]
Item 17: Use "the swap trick" to trim excess capacity.
[哈,我一点都不懂!]
Item 18: Avoid using vector.
[惊诧!完全打击!我一直把vector当首选容器!Meyers,我希望你给我个
不用vector的理由先]
3. Associative Containers.
Item 19: Understand the difference between equality and equivalence.
[戳到死穴,真的不知道两者有何不同,马上查书去]
Item 20: Specify comparison types for associative containers of pointers.
[嗯,有道理!]
Item 21: Always have comparison functions return false for equal values.
[啊?又一个晴天霹雳!简直匪夷所思嘛!不过想想,啊,Meyers真伟大]
Item 22: Avoid in-place key modification in set and multiset.
[不好意思,从来没正儿八经用过set]
Item 23: Consider replacing associative containers with sorted vectors.
[好建议!]
Item 24: Prefer map::insert to map::operator[] when efficiency is a concern.
[嘿嘿,虽然没仔细想过这个问题,但是我可是一直都使用insert的哟!道理吗, 好想知道那么一点点,不过还是谨慎点好,我怕Meyers又来敲我的头...]
Item 25: Familiarize yourself with the nonstandard hashed containers.
[弱点!我还是快去补补课吧!]
4. Iterators.
Item 26: Prefer iterator to const_iterator, reverse_iterator, and const_reverse_iterator.
[晴天霹雳3!不是说要尽可能地用const吗,怎么加了个下划线就不认帐了?不行, 您得给我讲清楚...]
Item 27: Use distance and advance to convert const_iterators to iterators.
[丈二和尚]
Item 28: Understand how to use a reverse_iterator's base iterator.
[更是连概念都搞不清楚了,reverse_iterator还有base iterator? 赶快去查查书]
Item 29: Consider istreambuf_iterators for character by character input.
[唔,值得好好研究]
5. Algorithms.
Item 30: Make sure destination ranges are big enough.
[应该是可以理解的吧!]
Item 31: Know your sorting options.
[原则上理解]
Item 32: Follow remove-like algorithms by erase if you really want to remove something.
[呵呵,又可以理解!]
Item 33: Be wary of remove-like algorithms on containers of pointers.
[好险!这确实是个需要警惕的问题]
Item 34: Note which algorithms expect sorted ranges.
[不太清楚...]
Item 35: Implement simple case-insensitive string comparisons via mismatch or lexicographical_compare.
[不太清楚...]
Item 36: Use not1 and remove_copy_if to perform a copy_if.
[以前在comp.lang.c++.moderated上读到过关于这个条款的故事,很精彩的!Scott Meyers 和Matt Austern都在这个问题上不小心栽了跟头,最后还是Bjarne Stroustrup一锤定音。等毕业论文改完了讲给大家听。]
Item 37: Use accumulate or for_each to summarize sequences
[谨遵师命]
6. Functors, Functor Classes, Functions, etc.
Item 38: Design functor classes for pass-by-value.
[概念上有点糊涂]
Item 39: Make predicates pure functions.
[晴天霹雳4,Stroustrup不是说Functor可以产生更高效的inline代码吗?为什么predications要例外呢? 俺要个说法。]
Item 40: Make functor classes adaptable.
[这个问题跟条款36相关的,看来Meyers真的从copy_if的教训中挖掘出不少宝藏]
Item 41: Understand the reasons for ptr_fun, mem_fun, and mem_fun_ref.
[表面上是know了,但是老也想不起用它们来,说明还没有understand]
Item 42: Make sure less means operator<.
[从来没想到过这个问题有什么重要性]
7. Programming with the STL.
Item 43: Prefer algorithm calls to hand-written loops.
[我虽然从来都是如此这般作,却不知出了使自己的代码看起来更须cool以外还有什么别的道理]
Item 44: Prefer member functions to algorithms with the same names.
[算不上是晴天霹雳,但也很出乎我的意料,我一直以用纯algorithms操作contain为荣]
Item 45: Distinguish among count, find, binary_search, lower_bound, upper_bound, and equal_range.
[好像略知一二]
Item 46: Consider function objects instead of functions as algorithm parameters.
[这跟条款39不矛盾吗?]
Item 47: Avoid producing write-only code.
[不懂]
Item 48: Always #include the proper headers.
Item 49: Learn to decipher STL-related compiler diagnostics.
[谈何容易,尤其是VC]
Item 50: Familiarize yourself with STL-related web sites.
[知道一些,还不令我满意]
本文地址:http://com.8s8s.com/it/it3657.htm