大约有 8,000 项符合查询结果（耗时：0.0384秒） [XML]
c++编译错误：invalid new-expression of abstract class type - c++1y / s...
...实现，这样才能new 子类。
纯虚函数例如 void fun() = 0; 是纯虚函数，不是纯虚函数不作要求。
另外，void fun() { } 空函数体也是实现。
纯虚函数相当于C#中abstract抽象类。
=0 说明函数是...
Why is it wrong to use std::auto_ptr with standard containers?
...se of move semantics (its specification requires rvalue references), so it fundamentally requires C++11. However (and related) the C++11 Standard no longer says that an STL element type must be "copy-constructible" and "assignable"; being move-constructible and move-assignable suffices. Indeed uniqu...
How do you unit test private methods?
...
Reading the docs found on Microsoft's website here I don't see any mention of the PrivateObject class being deprecated. I'm using MSVS 2013 and it works as expected.
– stackunderflow
Nov 26 '13 at 23:36
...
How to POST raw whole JSON in the body of a Retrofit request?
...nvertion in the rest of your application code:
interface ServiceApi {
fun login(username: String, password: String) =
jsonLogin(createJsonRequestBody(
"username" to username, "password" to password))
@POST("/api/login")
fun jsonLogin(@Body params: RequestBod...
C# using streams
...sfer the strings to and from the stream as bytes. So
myStreamWriter.Write(123);
will write "123" (three characters '1', '2' then '3') to the stream. If you're dealing with text files (e.g. html), StreamReader and StreamWriter are the classes you would use.
Whereas
myBinaryWriter.Write(123);
w...
C# vs Java Enum (for those new to C#)
...
@finnw: I've never heard of the Code Review SE site - thanks for that! I've continues this discussion there (although it might deserve its own question here on Programmers).
– Allon Guralnek
Oct 21 '11 at 17:29
...
Validate that a string is a positive integer
...ue);
},
false
);
test("1", true);
test("1.23", false);
test("1234567890123", true);
test("1234567890123.1", false);
test("0123", false); // false because we don't handle leading 0s
test(" 123 ", false); // false because we don't handle whitespace
<label>
String:
<inp...
Difference between classification and clustering in data mining? [closed]
... answer instead of just a link. Link only answers are frowned upon because sites go down and with it the answer.
– Mathemats
Mar 4 '16 at 0:36
3
...
How to sort in-place using the merge sort algorithm?
...that the time-complexity of in-place algorithm mentioned in the penguin.ew site is O(log n * n^2).Since we have log n merges and each merge is of the order O(n ^2).Isnt that right ?
– code4fun
Apr 20 '16 at 6:38
...
What is a 'semantic predicate' in ANTLR?
...) throws Exception {
ANTLRStringStream in = new ANTLRStringStream("123, 456, 7 , 89");
NumbersLexer lexer = new NumbersLexer(in);
CommonTokenStream tokens = new CommonTokenStream(lexer);
NumbersParser parser = new NumbersParser(tokens);
parser.parse();
}...