大约有 12,000 项符合查询结果（耗时：0.0437秒） [XML]
How do I test for an empty JavaScript object?
...bject's prototype. obj.constructor can be easily forged. Example: function Foo() {} Foo.prototype.constructor = Object; (new Foo()).constructor === Object // true.
– Jesse
Apr 9 '18 at 9:22
...
The property 'value' does not exist on value of type 'HTMLElement'
...ent. Similarly in statically typed Java this won't compile:
public Object foo() {
return 42;
}
foo().signum();
signum() is a method of Integer, but the compiler only knows the static type of foo(), which is Object. And Object doesn't have a signum() method.
But the compiler can't know that, i...
Return first N key:value pairs from dict
...ts as
import itertools
import collections
d = collections.OrderedDict((('foo', 'bar'), (1, 'a'), (2, 'b'), (3, 'c'), (4, 'd')))
x = itertools.islice(d.items(), 0, 4)
for key, value in x:
print key, value
itertools.islice allows you to lazily take a slice of elements from any iterator. If yo...
How do I tell Maven to use the latest version of a dependency?
... an example illustrating the various options. In the Maven repository, com.foo:my-foo has the following metadata:
<?xml version="1.0" encoding="UTF-8"?><metadata>
<groupId>com.foo</groupId>
<artifactId>my-foo</artifactId>
<version>2.0.0</version>...
What does “javascript:void(0)” mean?
...e a control you can click on that opens up a previously-hidden <div id="foo">, it makes some sense to use <a href="#foo"> to link to it. Or if there is a non-JavaScript way of doing the same thing (for example, ‘thispage.php?show=foo’ that sets foo visible to begin with), you can lin...
AngularJS: How to clear query parameters in the URL?
...
viewModelHelper.navigateTo('foo/'); was persisting the query string to the foo url, so i fixed it by using window.location.href = 'foo/'; instead.
– jaybro
Sep 2 '15 at 18:33
...
Using Mockito's generic “any()” method
I have an interface with a method that expects an array of Foo :
4 Answers
4
...
How can I default a parameter to Guid.Empty in C#?
...
or
public void Problem(Guid optional = new Guid())
Note that the new Foo() value is only applicable when:
You're really calling the parameterless constructor
Foo is a value type
In other words, when the compiler knows it's really just the default value for the type :)
(Interestingly, I'm ...
How do I return early from a rake task?
...ich in a rake task has the same effect of using return in a method.
task :foo do
puts "printed"
next
puts "never printed"
end
Or you can move the code in a method and use return in the method.
task :foo do
do_something
end
def do_something
puts "startd"
return
puts "end"
end
I p...
What's the difference between getPath(), getAbsolutePath(), and getCanonicalPath() in Java?
...f what Sun like to call "hierarchical pathnames" (basically a path like c:/foo.txt or /usr/muggins). This is why you create files in terms of paths. The operations you are describing are all operations upon this "pathname".
getPath() fetches the path that the File was created with (../foo.txt)
get...