大约有 43,200 项符合查询结果（耗时：0.0558秒） [XML]
select and update database record with a single queryset
...et object update method:
MyModel.objects.filter(pk=some_value).update(field1='some value')
share
|
improve this answer
|
follow
|
...
Cluster analysis in R: determine the optimal number of clusters
...
1024
If your question is how can I determine how many clusters are appropriate for a kmeans analys...
how to break the _.each function in underscore.js
...
11 Answers
11
Active
...
Check if my app has a new version on AppStore
...
91
Here is a simple code snippet that lets you know if the current version is different
-(BOOL) ne...
Access mysql remote database from command line
...
17 Answers
17
Active
...
Closure in Java 7 [closed]
...
|
edited Nov 2 '15 at 16:21
mkobit
31.3k77 gold badges124124 silver badges129129 bronze badges
...
How to make a new List in Java
...
1008
List myList = new ArrayList();
or with generics (Java 7 or later)
List<MyType> myLis...
Why is i++ not atomic?
...
125
i++ is probably not atomic in Java because atomicity is a special requirement which is not pre...
.htaccess - how to force “www.” in a generic way?
...%{HTTP_HOST} !^www\. [NC]
RewriteCond %{HTTPS}s ^on(s)|
RewriteRule ^ http%1://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
The first condition checks whether the Host value is not empty (in case of HTTP/1.0); the second checks whether the the Host value does not begin with www.; the third checks for ...