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Why is there no Constant feature in Java?
...onst int x = 42;
std::cout << x << std::endl;
*const_cast<int*>(&x) = 7;
std::cout << x << std::endl;
return 0;
}
outputs 42 then 7.
Although x marked as const, as a non-const alias is created, x is not a constant. Not every compiler requires ...
Polymorphism in C++
...ompiler-provided polymorphism for builtin types, Standard conversions, and casting/coercion are discussed later for completeness as:
they're commonly intuitively understood anyway (warranting a "oh, that" reaction),
they impact the threshold in requiring, and seamlessness in using, the above mecha...
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
...
How do you view ALL text from an ntext or nvarchar(max) in SSMS?
... on it would open it in a new window. The work around I normally use is to cast it to XML as here. XML data can be set to allow unlimited length.
– Martin Smith
Aug 10 '12 at 9:10
...
Do I really have a car in my garage? [duplicate]
...rYears on a Vehicle without caring about the implementation.
Usually, downcasting is a sign of a flawed design: do not store your vehicles all together if you need to differenciate their actual type.
Note: of course the design here can be easily improved. It is just an example to demonstrate the p...
How can I generate a unique ID in Python? [duplicate]
I need to generate a unique ID based on a random value.
8 Answers
8
...
How to pass anonymous types as parameters?
...
If casting with "as" you should check if list is null
– Alex
Jul 8 '11 at 13:11
...
How to get the caller's method name in the called method?
...ccessing.
import inspect
from types import FrameType
from typing import cast
def caller_name() -> str:
"""Return the calling function's name."""
# Ref: https://stackoverflow.com/a/57712700/
return cast(FrameType, cast(FrameType, inspect.currentframe()).f_back).f_code.co_name
if...
【内核源码】linux UDP实现 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
【内核源码】linux UDP实现linux-udp创建udp socket在socket()创建的时候，会设置对应协议的操作集。 inet_dgram_ops是系统调用层直接调用的操作。udp_prot是底层协议的处理。可以看到相比TCP，UDP不用accept(),lis 创建udp socket
在socket()创建...
Is it possible to install another version of Python to Virtualenv?
...] DEST_DIR
Options:
--version show program's version number and exit.
-h, --help show this help message and exit.
-v, --verbose Increase verbosity.
-q, --quiet Decrease verbosity.
-p PYTHON_EXE, --python=PYTHON_EXE
The Pytho...