大约有 18,400 项符合查询结果（耗时：0.0305秒） [XML]
How do I convert a Django QuerySet into list of dicts?
...
Use the .values() method:
>>> Blog.objects.values()
[{'id': 1, 'name': 'Beatles Blog', 'tagline': 'All the latest Beatles news.'}],
>>> Blog.objects.values('id', 'name')
[{'id': 1, 'name': 'Beatles Blog'}]
Note: the result is a QuerySet which mostly behaves like a list...
Replace values in list using Python [duplicate]
...ts to have a replace method? (similar to str.replace). Something that avoids the need for this: def replace(items, a, b): return [b if x == a else x for x in items]
– Bill
Sep 13 '16 at 17:07
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Multiple types were found that match the controller named 'Home'
... often happens when you use areas and you have the same controller name inside the area and the root. For example you have the two:
~/Controllers/HomeController.cs
~/Areas/Admin/Controllers/HomeController.cs
In order to resolve this issue (as the error message suggests you), you could use namesp...
Why would one use nested classes in C++?
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Nested classes are cool for hiding implementation details.
List:
class List
{
public:
List(): head(nullptr), tail(nullptr) {}
private:
class Node
{
public:
int data;
No...
How to generate a simple popup using jQuery
... z-index:100;
}
.messagepop {
background-color:#FFFFFF;
border:1px solid #999999;
cursor:default;
display:none;
margin-top: 15px;
position:absolute;
text-align:left;
width:394px;
z-index:50;
padding: 25px 25px 20px;
}
label {
display: block;
margin-bottom: 3px;
padding-le...
Index on multiple columns in Ruby on Rails
...columns in sequence starting at the beginning. i.e. if you index on [:user_id, :article_id], you can perform a fast query on user_id or user_id AND article_id, but NOT on article_id.
Your migration add_index line should look something like this:
add_index :user_views, [:user_id, :article_id]
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TypeScript: problems with type system
...ave a problem with its type system. My html site has a canvas tag with the id "mycanvas". I'm trying to draw a rectangle on this canvas. Here's the code
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How to use Checkbox inside Select Option
...lect Option menu containing a checkbox together with the item name as individual items in the list.
Is there anyway possible to add a checkbox inside a Select Option menu?
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How to move an element into another element?
I would like to move one DIV element inside another. For example, I want to move this (including all children):
15 Answers
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Styling an input type=“file” button
...the input will not respond to the likes of:
<input type="file" style="width:200px">
Instead, you will need to use the size attribute:
<input type="file" size="60" />
For any styling more sophisticated than that (e.g. changing the look of the browse button) you will need to look at ...