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C#位运算符（C#按位与、按位或 等） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...&15;
printf("a=%d\tb=%d\n",a,b);
}
请再看一例!
main(){
char a='a',b='b';
int p,c,d;
p=a;
p=(p<<8)|b;
d=p&0xff;
c=(p&0xff00)>>8;
printf("a=%d\nb=%d\nc=%d\nd=%d\n",a,b,c,d);
}
六、 右移运算符(>>)
1、运算规则
用来将一个...
LINQ equivalent of foreach for IEnumerable
...d evaluating Funcs
var evaluatedObservable = observable.ToEnumerable().Select(func => func()).ToList();
//Win
Assert.That(evaluatedObservable,
Is.EquivalentTo(values.ToList()));
}
The following fails with the error:
Expected: equivalent to < 0, 1, 2, 3, 4, 5, 6, 7, 8, ...
Should I impose a maximum length on passwords?
...elves), but my bank has a requirement that passwords are between 6 and 8 characters long, and I started wondering...
20 A...
+ operator for array in PHP?
... 'adding' or 'merging' arrays would do. Other languages/libraries use + to concatenate lists (e.g. in Python) and "merge" functions to add the key/value pairs from one object onto another (e.g. in lodash). Yet in PHP it's the other way round; array_merge can be used for concatenating list-like array...
Why is “while ( !feof (file) )” always wrong?
...e is again std::cin, just as before.
POSIX, write(2) to flush a buffer:
char const * p = buf;
ssize_t n = bufsize;
for (ssize_t k = bufsize; (k = write(fd, p, n)) > 0; p += k, n -= k) {}
if (n != 0) { /* error, failed to write complete buffer */ }
The result we use here is k, the numb...
In Vim, I'd like to go back a word. The opposite of `w`
...nd B to advance/go back a WORD (which
consists of a sequence of non-blank characters separated with white space, according to :h WORD).
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How many and which are the uses of “const” in C++?
...p you to decide when and when not you need to copy.
struct MyString {
char * getData() { /* copy: caller might write */ return mData; }
char const* getData() const { return mData; }
};
Explanation: You might want to share data when you copy something as long as the data of the originally ...
Convert from ASCII string encoded in Hex to plain ASCII?
...ing="Latin1") 'päul' For those of us playing in binary, the extended characters choke on the default utf-8 decode, other than that, this is the most portable answer I see! Thanks!
– grambo
Nov 17 '17 at 16:14
...
Passing an array by reference
...an be passed by reference OR by degrading to a pointer. For example, using char arr[1]; foo(char arr[])., arr degrades to a pointer; while using char arr[1]; foo(char (&arr)[1]), arr is passed as a reference. It's notable that the former form is often regarded as ill-formed since the dimension...
Difference between two lists
...4 = list2.Except(list1); //list4 contains only 6, 7
var resultList = list3.Concat(list4).ToList(); //resultList contains 1, 2, 6, 7
Or you can use SymmetricExceptWith method of HashSet. But it changes the set on which called:
var list1 = new List<int> { 1, 2, 3, 4, 5};
var list2 = new List&...