大约有 22,000 项符合查询结果（耗时：0.0277秒） [XML]
scheduleAtFixedRate vs scheduleWithFixedDelay
...
I could not understand the "extra" word mentioned in scheduleAtFixedRate time series diagram.
– MuneshSingh
Mar 25 '18 at 6:39
1
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How to vertically center divs? [duplicate]
...ng with a 'display: inline-box'. The line-height of the contents can cause extra space below the inline-box, and the result is that the child is aligned slightly above centre. I am not sure what part of the html spec causes this, but I found it to be unobvious and it took a while to work out the rea...
Django class-based view: How do I pass additional parameters to the as_view method?
...m urls.py
https://docs.djangoproject.com/en/1.7/topics/http/urls/#passing-extra-options-to-view-functions
This also works for generic views. Example:
url(r'^$', views.SectionView.as_view(), { 'pk': 'homepage', 'another_param':'?'}, name='main_page'),
In this case the parameters passed to the vi...
How do I call ::std::make_shared on a class with only protected or private constructors?
...and doesn't require a derived class:
#include <memory>
#include <string>
class A {
protected:
struct this_is_private;
public:
explicit A(const this_is_private &) {}
A(const this_is_private &, ::std::string, int) {}
template <typename... T>
static ::std:...
C++ preprocessor __VA_ARGS__ number of arguments
...GS__})/sizeof(int))
Full example:
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#define NUMARGS(...) (sizeof((int[]){__VA_ARGS__})/sizeof(int))
#define SUM(...) (sum(NUMARGS(__VA_ARGS__), __VA_ARGS__))
void sum(int numargs, ...);
int main(int argc, char *argv[]...
Add only non-whitespace changes
...l - its only special characters are ", \, \n, and ; (outside of a "-quoted string). This is why a " must always be escaped, even if it looks like it's inside a single-quoted string (which git is completely agnostic about).
This is important, eg. if you have a handy alias to execute a bash command i...
Counting DISTINCT over multiple columns
... the columns, then get the distinct count of instances of the concatenated string.
SELECT count(DISTINCT concat(DocumentId, DocumentSessionId)) FROM DocumentOutputItems;
In MySQL you can do the same thing without the concatenation step as follows:
SELECT count(DISTINCT DocumentId, DocumentSessio...
How to justify a single flexbox item (override justify-content)
... ( the one with display:flex ) to justify-content:space-around
Then add an extra element between the first and second item and set it to flex-grow:10 (or some other value that works with your setup)
Edit: if the items are tightly aligned it's a good idea to add flex-shrink: 10; to the extra element...
Generate UML Class Diagram from Java Project [closed]
... sucks. Hard. Instructions want users to prefix all properties with an 'f' char to sniff them. It is destructive, too, and adds a bunch of its own comments to ALL class files. Also, instructions are non-intuitive. If someone can refute my experience (based on the current version in Kepler), please d...
SQL query to select dates between two dates
...etween '2011/02/25' and '2011/02/27'
The date values need to be typed as strings.
To ensure future-proofing your query for SQL Server 2008 and higher, Date should be escaped because it's a reserved word in later versions.
Bear in mind that the dates without times take midnight as their defaults,...