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What is the difference between std::array and std::vector? When do you use one over other? [duplicat
...t. Creating large objects on the stack is generally frowned upon, and the extra level of indirection is usually irrelevant. (For example, if you iterate through all of the elements, the extra memory access only happens once at the start of the loop.)
The vector's elements are guaranteed to be con...
Check if a string contains one of 10 characters
I'm using C# and I want to check if a string contains one of ten characters, *, &, # etc etc.
6 Answers
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Is multiplication and division using shift operators in C actually faster?
...looks so C'ish is because it was over 15 years ago.
I'd obviously use std::string and iterators today.)
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What is the C# equivalent of NaN or IsNumeric?
What is the most efficient way of testing an input string whether it contains a numeric value (or conversely Not A Number)? I guess I can use Double.Parse or a regex (see below) but I was wondering if there is some built in way to do this, such as javascript's NaN() or IsNumeric() (was that VB...
Why does string::compare return an int?
Why does string::compare return an int instead of a smaller type like short or char ? My understanding is that this method only returns -1, 0 or 1.
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Max length for client ip address [duplicate]
...er for details about IPv4-mapped IPv6 addresses. (The correct maximum IPv6 string length is 45 characters.)
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Storing SHA1 hash values in MySQL
.... When storing the hash as binary, phpmyadmin will display the it as a hex string, but pma will be unable to use it in the provided "search tab". Will work only if you add the UNHEX() manually to the sql.
– Timo Huovinen
Jan 14 '14 at 12:05
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浅谈APM在电子交易系统中的应用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...统层，对于应用层一般无能为力，有的管理系统可以通过插件的形式监控到如apache tomcat aoracle等应用但彼此是孤立的，并不能把整个系统作为一个整体，为运维人员员提供详细的运维依据，只能靠运维人员的经验去分析判断故障...
C++ convert from 1 char to string? [closed]
I need to cast only 1 char to string . The opposite way is pretty simple like str[0] .
2 Answers
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Generate random password string with requirements in javascript
I want to generate a random string that has to have 5 letters from a-z and 3 numbers.
18 Answers
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