大约有 13,350 项符合查询结果（耗时：0.0256秒） [XML]
Difference between Django's annotate and aggregate methods?
... in the queryset.
Aggregation
>>> Book.objects.aggregate(average_price=Avg('price'))
{'average_price': 34.35}
Returns a dictionary containing the average price of all books in the queryset.
Annotation
>>> q = Book.objects.annotate(num_authors=Count('authors'))
>>> q[...
Make a Bash alias that takes a parameter?
... and a function are not equivalent... echo -e '#!/bin/bash\nshopt -s expand_aliases\nalias asrc='\''echo "${BASH_SOURCE[0]}"'\'' # note the '\''s\nfunction fsrc(){ echo "${BASH_SOURCE[0]}";}'>>file2&&echo -e '#!/bin/bash\n. file2\nalias rl='\''readlink -f'\''\nrl $(asrc)\nrl $(fsrc)'&g...
Accessing UI (Main) Thread safely in WPF
... example:
class MyViewModel
{
private readonly SynchronizationContext _syncContext;
public MyViewModel()
{
// we assume this ctor is called from the UI thread!
_syncContext = SynchronizationContext.Current;
}
// ...
private void watcher_Changed(object send...
How to limit UITableView row reordering to a section
...s answer for you lazy people:
Swift 3, 4 & 5
override func tableView(_ tableView: UITableView, targetIndexPathForMoveFromRowAt sourceIndexPath: IndexPath, toProposedIndexPath proposedDestinationIndexPath: IndexPath) -> IndexPath {
if sourceIndexPath.section != proposedDestinationIndexPa...
What is the difference between SessionState and ViewState?
...rver side control datas are transferred to the server as key value pair in __Viewstate and transferred back and rendered to the appropriate control in client when postback occurs.
share
|
improve th...
How to deselect a selected UITableView cell?
...ndexPath:indexPath animated:YES];
}
Swift 3.0:
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
//Change the selected background view of the cell.
tableView.deselectRow(at: indexPath, animated: true)
}
...
ASP.NET MVC partial views: input name prefixes
...n your views like this :
<%= Html.PartialFor(model => model.Child, "_AnotherViewModelControl") %>
and you will see everything is ok!
share
|
improve this answer
|
...
Understand convertRect:toView:, convertRect:FromView:, convertPoint:toView: and convertPoint:fromVie
... here I want to take some subview and put it in my view's coordinate space
_originalFrame = [[aView superview] convertRect: aView.frame toView: self];
share
|
improve this answer
|
...
RichTextBox (WPF) does not have string property “Text”
...
How about just doing the following:
_richTextBox.SelectAll();
string myText = _richTextBox.Selection.Text;
share
|
improve this answer
|
...
How to pass parameters to a view
....options:
initialize: function(options) {
this.options = options;
_.bindAll(this, 'render');
},
or use some finer ways as described by @Brave Dave.
share
|
improve this answer
|
...