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深入浅出计算机字符集编码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...二进制内容，不同的编码环境下显示不一致：
unsigned char j = 0xa1;
for(; j < 0xdf-30; j++)
{
char p[1024];
sprintf(p, "%d\t%02x\t%o\t%c \t %d\t%02x\t%o\t%c", j,j,j,j, j+31,j+31,j+31,j+31);
std::cout << p << std::endl;
}
（整形，十六进制，八进制，字符...
How do I use InputFilter to limit characters in an EditText in Android?
I want to restrict the chars to 0-9, a-z, A-Z and spacebar only. Setting inputtype I can limit to digits but I cannot figure out the ways of Inputfilter looking through the docs.
...
\d is less efficient than [0-9]
...id it was probably more efficient to use a range or digit specifier than a character set.
5 Answers
...
Allowed characters in filename [closed]
Where can I find a list of allowed characters in filenames, depending on the operating system?
(e.g. on Linux, the character : is allowed in filenames, but not on Windows)
...
Unique Constraint in Entity Framework Code First
...n k in uniqueAtt.KeyFields on pi.Name equals k
select new { KeyField = k, Value = pi.GetValue(entity, null).ToString() };
foreach (var item in _objectSet)
{
var keyValues = from pi in item.GetType().GetProperties()
j...
How to handle Objective-C protocols that contain properties?
...hInteger:(factor*amount)];
}
// <<
@end
int main(int argc, const char * argv[])
{
@autoreleasepool {
Person *duncan=[[Person alloc]initConforming];
duncan.firstname=@"Duncan";
duncan.lastname=@"Smith";
[Viewer printLargeDescription:duncan];
S...
How to generate string of a certain length to insert into a file to meet a file size criteria?
...
You can always use the a constructor for string which takes a char and a number of times you want that character repeated:
string myString = new string('*', 5000);
This gives you a string of 5000 stars - tweak to your needs.
...
What's the best way to trim std::string?
...p;s) {
s.erase(s.begin(), std::find_if(s.begin(), s.end(), [](unsigned char ch) {
return !std::isspace(ch);
}));
}
// trim from end (in place)
static inline void rtrim(std::string &s) {
s.erase(std::find_if(s.rbegin(), s.rend(), [](unsigned char ch) {
return !std::is...
How to remove spaces from a string using JavaScript?
...
split(' ') and join won't remove \n , \t white space chars, another workaround is a.split('').map(c =>c.trim()).join('')
– rab
Apr 18 '19 at 10:40
ad...
“:” (colon) in C struct - what does it mean? [duplicate]
... struct
{
short a : 4;
short b : 3;
} test2;
struct
{
char a : 4;
char b : 3;
} test3;
struct
{
char a : 4;
short b : 3;
} test4;
printf("test1: %d\ntest2: %d\ntest3: %d\ntest4: %d\n", sizeof(test1), sizeof(test2), sizeof(test3), sizeof(test4));
test...