大约有 48,000 项符合查询结果（耗时：0.0560秒） [XML]
In Django, how do I check if a user is in a certain group?
...ming, there is one initial user
user.groups.add(group) # user is now in the "Editor" group
then user.groups.all() returns [<Group: Editor>].
Alternatively, and more directly, you can check if a a user is in a group by:
if django_user.groups.filter(name = groupname).exists():
...
Why Maven uses JDK 1.6 but my java -version is 1.7
...n -s /Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/ CurrentJDK
Now it shall work immediately.
share
|
improve this answer
|
follow
|
...
How to substring in jquery
...he substr function will allow you to extract certain parts of the string.
Now, if you're looking for a specific string or character to use to find what part of the string to extract, you can make use of the indexOf function as well.
http://www.w3schools.com/jsref/jsref_IndexOf.asp
The question is ...
Set value to NULL in MySQL
...emname')");
So the $quantity is outside of the main string.
My sql table now accepted to record null quantity instead of 0
share
|
improve this answer
|
follow
...
Swift: declare an empty dictionary
...ict = [:] // ok, I'm done with it
In the last example the dictionary is known to have a type Dictionary<String, String> by the first line. Note that you didn't have to specify it explicitly, but it has been inferred.
...
How to check if an NSDictionary or NSMutableDictionary contains a key?
...values. Even @NO, @0, and [NSNull null] evaluate as true.
Edit: Swift is now a thing.
For Swift you would try something like the following
if let value = myDictionary[myKey] {
}
This syntax will only execute the if block if myKey is in the dict and if it is then the value is stored in the va...
How to delete a file from SD card?
I am creating a file to send as an attachment to an email. Now I want to delete the image after sending the email. Is there a way to delete the file?
...
css ellipsis on second line
...ext-overflow: ellipsis; to work is a one-line version of white-space (pre, nowrap etc). Which means the text will never reach the second line.
Ergo. Not possible in pure CSS.
My source when I was looking for the exact same thing just now: http://www.quirksmode.org/css/textoverflow.html (Quirksmode...
Remove all whitespaces from NSString
...
Oh man, I like this included unit tests business. Now not only can I copy-paste my code from SO, but I can also copy-paste the tests for that code!
– TylerJames
Oct 31 '17 at 14:43
...
Writing a Python list of lists to a csv file
...pd = pandas.DataFrame(not_index_list, columns = columns, index = index)
#Now you have a csv with columns and index:
pd.to_csv("mylist.csv")
share
|
improve this answer
|
...