大约有 21,000 项符合查询结果（耗时：0.0314秒） [XML]
In Objective-C, what is the equivalent of Java's “instanceof” keyword?
... ([myObject class] == [MyClass class])
but not by using directly MyClass identifier.
Similarily, you can find if the object is of a subclass of your class with:
if ([myObject isKindOfClass:[AnObject class]])
as suggested by Jon Skeet and zoul.
...
How Do I Hide wpf datagrid row selector
I'm using the WPF DataGrid control to show some details and a select button, and I don't need the gray selector column down the left-hand side. It's also ruining the beauty of my design.
...
How do I comment in CoffeeScript? “/* this */” doesn't work
...
Why downvote? It's a valid warning. Really, it's saying don't use a solid line of # as a section separator, or you may occasionally get unbalanced block comment pairs.
– Jim Mack
Dec 8 '16 at 3:52
...
Visual Studio replace tab with 4 spaces?
...k me so long to find the setting was the fact that theres a checkbox that hides half the settings. be sure to check show all settings
– Andrew Afternoon-Delight Hayde
May 1 '15 at 14:42
...
Can you find all classes in a package using reflection?
...le. Class loaders are not required to tell the VM which classes it can provide, instead they are just handed requests for classes, and have to return a class or throw an exception.
However, if you write your own class loaders, or examine the classpaths and it's jars, it's possible to find this info...
Getting “unixtime” in Java
...
Avoid the Date object creation w/ System.currentTimeMillis(). A divide by 1000 gets you to Unix epoch.
As mentioned in a comment, you typically want a primitive long (lower-case-l long) not a boxed object long (capital-L Long)...
Are static fields inherited?
...not inheriting" the static from the base class, since, so to speak, it's "hiding" it with its own homonymous one.
share
|
improve this answer
|
follow
|
...
MongoDB inserts float when trying to insert integer
...
I have a question. The NumberInt is only provided in mongo shell, how do you do that in JavaScript language like node.js?
– 萧易客
Jun 16 '16 at 17:05
...
composer: How to find the exact version of a package?
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled...
PowerShell and the -contains operator
Consider the following snippet:
4 Answers
4
...