大约有 44,867 项符合查询结果（耗时：0.0470秒） [XML]
Why prefer two's complement over sign-and-magnitude for signed numbers?
...n order to represent -1 in binary, two's complement is used: flipping the bits and adding 1?
18 Answers
...
No tests found with test runner 'JUnit 4'
...st happened to me. Rebuilding or restarting Eclipse didn't help.
I solved it by renaming one of the test methods to start with "test..." (JUnit3 style) and then all tests are found. I renamed it back to what it was previously, and it still works.
...
Find the last element of an array while using a foreach loop in PHP
I am writing a SQL query creator using some parameters. In Java, it's very easy to detect the last element of an array from inside the for loop by just checking the current array position with the array length.
...
Makefiles with source files in different directories
...
The traditional way is to have a Makefile in each of the subdirectories (part1, part2, etc.) allowing you to build them independently. Further, have a Makefile in the root directory of the project which builds everything. The "root"...
Should __init__() call the parent class's __init__()?
...
In Python, calling the super-class' __init__ is optional. If you call it, it is then also optional whether to use the super identifier, or whether to explicitly name the super class:
object.__init__(self)
In case of object, calling the super method is not strict...
When do you use map vs flatMap in RxJava?
...to transform your json to an object, using map should be enough.
Dealing with the FileNotFoundException is another problem (using map or flatmap wouldn't solve this issue).
To solve your Exception problem, just throw it with a Non checked exception : RX will call the onError handler for you.
Obse...
How does Access-Control-Allow-Origin header work?
Apparently, I have completely misunderstood its semantics. I thought of something like this:
16 Answers
...
Check if a user has scrolled to the bottom
...= $(document).height()) {
alert("bottom!");
}
});
You can test it here, this takes the top scroll of the window, so how much it's scrolled down, adds the height of the visible window and checks if that equals the height of the overall content (document). If you wanted to instead check i...
Effective method to hide email from spam bots
...
Working with content and attr in CSS:
.cryptedmail:after {
content: attr(data-name) "@" attr(data-domain) "." attr(data-tld);
}
<a href="#" class="cryptedmail"
data-name="info"
data-domain="example"
data-tld=...
Why doesn't JUnit provide assertNotEquals methods?
Does anybody know why JUnit 4 provides assertEquals(foo,bar) but not assertNotEqual(foo,bar) methods?
11 Answers
...