大约有 46,000 项符合查询结果（耗时：0.0187秒） [XML]
How do I sort an NSMutableArray with custom objects in it?
...
I did this in iOS 4 using a block.
Had to cast the elements of my array from id to my class type.
In this case it was a class called Score with a property called points.
Also you need to decide what to do if the elements of your array are not the right type, for thi...
Call Activity method from adapter
... I would strongly suggest NOT TO USE this solution. You should avoid class casting here, because this might lead to runtime exceptions.
– Igor Filippov
Nov 14 '14 at 10:18
3
...
Why do some claim that Java's implementation of generics is bad?
...Wildcarding is generally confusing
Various restrictions due to the above - casting etc
Good:
Wildcarding allows covariance/contravariance to be specified at calling side, which is very neat in many situations
It's better than nothing!
...
When do Java generics require
...
On the assertThat making sure the cast is performed for you, the matcher.matches() method doesn't care, so since the T is never used, why involve it? (the method return type is void)
– Yishai
May 22 '09 at 14:30
...
How to determine if a string is a number with C++?
...
You can do it the C++ way with boost::lexical_cast. If you really insist on not using boost you can just examine what it does and do that. It's pretty simple.
try
{
double x = boost::lexical_cast<double>(str); // double could be anything with >> operato...
NSLog an object's memory address in overridden description method
... Additional note: %p expects a pointer of type void *, you have to cast self back to void *, else undefined behavior occurs.
– user529758
Jun 2 '13 at 20:23
4
...
Why is it Valid to Concatenate Null Strings but not to Call “null.ToString()”?
...n? var wtf = ((String)null).ToString(); I'm working in Java recently where casting null's is possible, has been a while since I worked with C#.
– Jochem
May 30 '12 at 13:56
14
...
What is the 'dynamic' type in C# 4.0 used for?
...me. Think of it as being able to interact with an Object without having to cast it.
dynamic cust = GetCustomer();
cust.FirstName = "foo"; // works as expected
cust.Process(); // works as expected
cust.MissingMethod(); // No method found!
Notice we did not need to cast nor declare cust as type Cus...
Update all values of a column to lowercase
...hes the given name and argument types. You might need to add explicit type casts.
– Luna Lovegood
Oct 11 '19 at 7:16
add a comment
|
...
Flags to enable thorough and verbose g++ warnings
...ed. This is my final set of suggested warnings:
-pedantic -Wall -Wextra -Wcast-align -Wcast-qual -Wctor-dtor-privacy -Wdisabled-optimization -Wformat=2 -Winit-self -Wlogical-op -Wmissing-declarations -Wmissing-include-dirs -Wnoexcept -Wold-style-cast -Woverloaded-virtual -Wredundant-decls -Wshadow ...