大约有 40,000 项符合查询结果（耗时：0.0572秒） [XML]
Better to 'try' something and catch the exception or test if it's possible first to avoid an excepti
...est option when the index is probably in the list and the IndexError is usually not raised. This way you avoid the need for an extra lookup by if index < len(my_list).
Python encourages the use of exceptions, which you handle is a phrase from Dive Into Python. Your example not only handles the e...
What does '
...
It's a shorthand for this:
<?php echo $a; ?>
They're called short tags; see example #2 in the documentation.
share
|
improve this answer
|
follow
...
Fetch frame count with ffmpeg
...default=nokey=1:noprint_wrappers=1 input.mp4
This is a fast method.
Not all formats (such as Matroska) will report the number of frames resulting in the output of N/A. See the other methods listed below.
ffprobe: Count the number of frames
ffprobe -v error -count_frames -select_streams v:0 -sh...
What does it mean when a CSS rule is grayed out in Chrome's element inspector?
... selected DOM node.
I guess, for the sake of completeness, dev tools shows all the rules from that set, whether they are applied or not.
In the case where a rule is applied to the currently selected element due to inheritance (i.e. the rule was applied to an ancestor, and the selected element inher...
How to POST raw whole JSON in the body of a Retrofit request?
...String foo, String bar) {
this.foo = foo;
this.bar = bar;
}
}
Calling with:
FooResponse = foo.postJson(new FooRequest("kit", "kat"));
Will yield the following body:
{"foo":"kit","bar":"kat"}
The Gson docs have much more on how object serialization works.
Now, if you really really ...
How do I get java logging output to appear on a single line?
....ZipUtil unzip: Failed to load: foo.zip
2) Putting it to IDEs
IDEs typically let you set system properties for a project.
E.g. in NetBeans, instead of adding -D...=... somewhere, add the property in the action dialog, in a form of java.util.logging.SimpleFormatter.format=%1$tY-%1$tm-... - without...
What is the correct answer for cout
...r<<(std::operator<<(std::cout, a++), a);
C++ guarantees that all side effects of previous evaluations will have been performed at sequence points. There are no sequence points in between function arguments evaluation which means that argument a can be evaluated before argument std::ope...
How to Pass Parameters to Activator.CreateInstance()
...rs.
Based on that, you can pass a array towards CreateInstance. This will allow you to have 0 or multiple arguments.
public T CreateInstance<T>(params object[] paramArray)
{
return (T)Activator.CreateInstance(typeof(T), args:paramArray);
}
...
How to round a number to n decimal places in Java
...ues into account. Floating point values have a binary representation internally. That means that a value like 2.7735 does not actually have that exact value internally. It can be slightly larger or slightly smaller. If the internal value is slightly smaller, then it will not round up to 2.7740. To r...
Creating a JavaScript cookie on a domain and reading it across sub domains
...lhost cookies a bit differently than other cookies. Or rather, they treat all cookies in a way that makes working with localhost difficult. For instance, see stackoverflow.com/questions/1134290/…. I suggest editing your hosts file and aliasing something like myserver.local to 127.0.0.1. Then y...