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Identify if a string is a number
If I have these strings:
25 Answers
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“#include” a text file in a C program as a char[]
Is there a way to include an entire text file as a string in a C program at compile-time?
17 Answers
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STL中map容器使用自定义key类型报错详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...de\functional(143) : error C2784: “bool std::operator <(const std::basic_string<_Elem,_Traits,_Alloc> &,const _Elem *)”: 无法从“const a”为“const std::basic_string<_Elem,_Traits,_Alloc> &”推导 模板 参数
1> f:\vs2008\vc\include\string(150) : 参见“std::operator <”...
std::string to char*
I want to convert a std::string into a char* or char[] data type.
18 Answers
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How do I show the value of a #define at compile-time?
...al query, but this may still be useful.
This can be done in GCC using the stringify operator "#", but it requires two stages.
#define XSTR(x) STR(x)
#define STR(x) #x
The value of a macro can then be displayed with:
#pragma message "The value of ABC: " XSTR(ABC)
See: 3.4 Stringification in th...
How to get rid of `deprecated conversion from string constant to ‘char*’` warnings in GCC?
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I believe passing -Wno-write-strings to gcc will suppress this warning.
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Take a char input from the Scanner
...seDelimiter("");
After this reader.next() will return a single-character string.
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Convert a Scala list to a tuple?
...cala> val hlist = "z" :: 6 :: "b" :: true :: HNil
hlist: shapeless.::[String,shapeless.::[Int,shapeless.::[String,shapeless.::[Boolean,shapeless.HNil]]]] = z :: 6 :: b :: true :: HNil
scala> val tup = hlist.tupled
tup: (String, Int, String, Boolean) = (z,6,b,true)
scala> tup
res0: (St...
How do I remove an item from a stl vector with a certain value?
...which can be passed to container_type::erase to do the REAL removal of the extra elements that are now at the end of the container:
std::vector<int> vec;
// .. put in some values ..
int int_to_remove = n;
vec.erase(std::remove(vec.begin(), vec.end(), int_to_remove), vec.end());
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Convert HashBytes to VarChar
I want to get the MD5 Hash of a string value in SQL Server 2005. I do this with the following command:
7 Answers
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