大约有 47,000 项符合查询结果（耗时：0.0663秒） [XML]
Check if Internet Connection Exists with Javascript? [duplicate]
...ipt>window.jQuery || document.write('<script src="js/vendor/jquery-1.10.2.min.js"><\/script>')</script>
This is probably the easiest way given that your issue is centered around jQuery.
If you wanted a more robust solution you could try:
var online = navigator.onLine;
Read...
How to index into a dictionary?
...
110
Dictionaries are unordered in Python versions up to and including Python 3.6. If you do not ca...
Simple logical operators in Bash
...ary is just ideal.
– KomodoDave
May 10 '13 at 8:31
10
It's better to use == to differentiate the ...
Javascript: How to check if a string is empty? [duplicate]
...
answered Mar 4 '10 at 17:46
Dustin LaineDustin Laine
35.3k99 gold badges7878 silver badges119119 bronze badges
...
typeof for RegExp
...
answered Dec 2 '10 at 20:08
CleitonCleiton
13.1k1313 gold badges4141 silver badges5757 bronze badges
...
How to only find files in a given directory, and ignore subdirectories using bash
...
answered Oct 10 '11 at 16:03
Mark LongairMark Longair
358k6565 gold badges384384 silver badges314314 bronze badges
...
Definition of a Balanced Tree
... |
edited Dec 18 '15 at 10:27
Sk8erPeter
6,16499 gold badges4242 silver badges6565 bronze badges
answe...
Hidden Features of JavaScript? [closed]
... is being deprecated.
– ken
Dec 29 '10 at 21:50
|
show 6 more comments
...
How to detect my browser version and operating system using JavaScript?
...
10 Answers
10
Active
...
How to check if a user is logged in (how to properly use user.is_authenticated)?
...
Update for Django 1.10+:
is_authenticated is now an attribute in Django 1.10.
The method was removed in Django 2.0.
For Django 1.9 and older:
is_authenticated is a function. You should call it like
if request.user.is_authenticated():
# do so...