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C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...结第1条：慎重选择容器类型。标准STL序列容器：vector、string、deque和list。标准STL关联容器：set、multiset、map和multimap。非标准序列容...
第1条：慎重选择容器类型。
标准STL序列容器：vector、string、deque和list。
标准STL关联容器：...
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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How can I unit test Arduino code?
...rks-in-progress in branches other than master, so check those branches for extra tests, too.
I chose to write my own lightweight test routines, but more robust unit-test frameworks like CppUnit are also available.
share
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Templated check for the existence of a class member function?
...SFINAE causes the template to be ignored. Usage like this:
HAS_MEM_FUNC(toString, has_to_string);
template<typename T> void
doSomething() {
if(has_to_string<T, std::string(T::*)()>::value) {
...
} else {
...
}
}
But note that you cannot just call that toString fu...
What's the difference between VARCHAR and CHAR?
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CHAR
Used to store character string value of fixed length.
The maximum no. of characters the data type can hold is 255 characters.
It's 50% faster than VARCHAR.
Uses static memory allocation.
VARCHAR
Used to store variable length alphanumeric data.
T...
Method Overloading for null argument
... Does this mean that if compiler were to choose in between doSomething(String str) and doSomething(Object obj) during runtime with doSomething(null), doSomething(String str) will be called.
– Sameer
Nov 10 '16 at 9:22
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Is there a way to get rid of accents and convert a whole string to regular letters?
... getting rid of accents and making those letters regular apart from using String.replaceAll() method and replacing letters one by one?
Example:
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How to remove illegal characters from path and filenames?
...st and simple way to remove illegal path and file characters from a simple string. I've used the below code but it doesn't seem to do anything, what am I missing?
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How do I count the number of occurrences of a char in a String?
I have the string
45 Answers
45
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How to convert a number to string and vice versa in C++
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Update for C++11
As of the C++11 standard, string-to-number conversion and vice-versa are built in into the standard library. All the following functions are present in <string> (as per paragraph 21.5).
string to numeric
float stof(const string&am...