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When should you not use virtual destructors?
...s hit testing, drawing, accessibility APIs that fetch the text for text-to-speech engines, etc.
– Ben Voigt
Apr 12 '10 at 23:41
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Create a dictionary on a list with grouping
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What's the magic of “-” (a dash) in command-line parameters?
... Do not overestimate people's ability to discern manners of speech from literal expressions. This has not been going on for millennia.
– tripleee
Jan 14 at 19:07
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What's the best way to check if a file exists in C?
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What is the purpose of the “final” keyword in C++11 for functions?
...s Devirtualization. A term worth remembering. :-)
There is a great recent speech by Andrei Alexandrescu which pretty well explains how you can workaround such situations today and how "final" might be part of solving similar cases "automatically" in the future (discussed with listeners):
http://ch...
二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...编码
在Version 1的尺寸下，纠错级别为H的情况下，编码: AC-42
1. 从字符索引表中找到 AC-42 这五个字条的索引 (10,12,41,4,2)
2. 两两分组: (10,12) (41,4) (2)
3.把每一组转成11bits的二进制:
(10,12) 10*45+12 等于 462 转成 00111001110
(41,4) 41*45+4 ...
Should image size be defined in the img tag height/width attributes or in CSS? [duplicate]
...he image. This also supports the idea that an arbitrary user agent (e.g. a speech browser) should have that information in order to relate it to the user. At the least, the aspect ratio could prove useful ("image has a width of 15 and a height of 200"). Such user agents wouldn't necessarily process ...
Getting distance between two points based on latitude/longitude
...erential calculus. using degrees is the exception, and only used in human speech.
– bluesmoon
Oct 17 '13 at 5:19
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