大约有 20,000 项符合查询结果（耗时：0.0464秒） [XML]
What does value & 0xff do in Java?
...
It sets result to the (unsigned) value resulting from putting the 8 bits of value in the lowest 8 bits of result.
The reason something like this is necessary is that byte is a signed type in Java. If you just wrote:
int result = value;
then result would end up with the value ff ff ff fe i...
Is it possible to forward-declare a function in Python?
Is it possible to forward-declare a function in Python? I want to sort a list using my own cmp function before it is declared.
...
How do I check if an object has a specific property in JavaScript?
How do I check if an object has a specific property in JavaScript?
24 Answers
24
...
Why should I use a pointer rather than the object itself?
I'm coming from a Java background and have started working with objects in C++. But one thing that occurred to me is that people often use pointers to objects rather than the objects themselves, for example this declaration:
...
Git clone particular version of remote repository
I cloned a remote git repository about a month ago. The remote repository has undergone many changes and has now become unstable. Now I need another copy of the repository, version identical to the one I cloned a month ago.
...
How to sort with a lambda?
I'd like to use a lambda function to sort custom classes in place of binding an instance method. However, the code above yields the error:
...
Check folder size in Bash
...cript that will calculate a directory size and if the size is less than 10GB, and greater then 2GB do some action. Where do I need to mention my folder name?
...
Web colors in an Android color xml resource file
...
You have surely made your own by now, but for the benefit of others, please find w3c and x11 below.
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="white">#FFFFFF</color>
<color name="yellow">#FFFF00</c...
Script parameters in Bash
I'm trying to make a shell script which should be used like this:
5 Answers
5
...
How to pass boolean values to a PowerShell script from a command prompt
I have to invoke a PowerShell script from a batch file. One of the arguments to the script is a boolean value:
10 Answers
...