大约有 46,000 项符合查询结果（耗时：0.0732秒） [XML]
is not JSON serializable
...er asked me to return the exact JSON format data instead of a json-encoded string to her.
Below is the solution.(This will return an object that can be used/viewed straightly in the browser)
import json
from xxx.models import alert
from django.core import serializers
def test(request):
alert_...
How do I get the parent directory in Python?
...y have to exist. There are a lot of pathname methods that does nothing but string manipulation. To verify if the pathname actually exist requires a disk access. Depends on the application this may or may not be desirable.
– Wai Yip Tung
May 18 '10 at 19:45
...
Unique Constraint in Entity Framework Code First
...
Starting with EF 6.1 it is now possible:
[Index(IsUnique = true)]
public string EmailAddress { get; set; }
This will get you a unique index instead of unique constraint, strictly speaking. For most practical purposes they are the same.
...
Redirect From Action Filter Attribute
...Action from the filter.
public new RedirectToRouteResult RedirectToAction(string action, string controller)
{
return base.RedirectToAction(action, controller);
}
Then your filter would look something like:
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
var...
How do I check the operating system in Python?
...om the docs it states that it will return Linux, Windows, Java or an empty string.devdocs.io/python~3.7/library/platform#platform.system
– Brandon Benefield
Sep 5 '18 at 4:18
3
...
How to set the style -webkit-transform dynamically using JavaScript?
...
So is the only way to do this with a string. Seems like it would be pretty slow if it was recursive.
– BBaysinger
Dec 3 '18 at 22:10
...
How to count the number of occurrences of an element in a List
...
In Java 8:
Map<String, Long> counts =
list.stream().collect(Collectors.groupingBy(e -> e, Collectors.counting()));
share
|
impr...
Assigning variables with dynamic names in Java
...lt;Integer>();
for (int i = 1; i < 4; i++) {
n.add(5);
}
Map<String, Integer> n = new HashMap<String, Integer>();
for (int i = 1; i < 4; i++) {
n.put("n" + i, 5);
}
It is possible to use reflection to dynamically refer to variables that have been declared in the sou...
How to check if function exists in JavaScript?
...luating to true, not necessarily a function (e.g. it could be a boolean, a string, etc). For example see jsfiddle.net/j5KAF/1
– Ohad Schneider
Apr 13 '14 at 7:53
...
Performing regex Queries with pymongo
...etter to my eyes. Why bother compiling a Python RE if you're just going to stringify it so that Mongo can compile it again? Mongo's $regex operator takes an $options argument.
– Mark E. Haase
May 16 '15 at 15:56
...