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Convert NSDate to NSString
... Don't use init with NSDateFormatter. It was removed after iOS 3.2. (And if you use a class method instead, it will autorelease and you won't have the leak problem, too.)
– zekel
Nov 8 '10 at 5:20
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What are -moz- and -webkit-? [duplicate]
I am a beginner at CSS and when I was looking at some CSS code the other day, I found these lines. In the tutorials I used to learn CSS, I have never seen anything like these lines. Could someone please explain these lines to me or give me a source where I could learn to implement lines like these?
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How to sync with a remote Git repository?
...ull is not going to work unless you've configured the remote to fetch from and the branch to merge to.
– Abizern
Nov 30 '10 at 11:53
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TypeError: ObjectId('') is not JSON serializable
...an aggregated function on document using Python, It returns valid response and i can print it but can not return it.
16 Ans...
Hibernate Error: org.hibernate.NonUniqueObjectException: a different object with the same identifier
I have two user Objects and while I try to save the object using
36 Answers
36
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Express next function, what is it really for?
...cumentation it says that next('route') can be used to jump to that route and skip all routes in between, but sometimes next is called without arguments. Anybody knows of a good tutorial etc that describes the next function?
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Why can't I define a default constructor for a struct in .NET?
...t have a constructor with no parameters. According to this post this is mandated by the CLI specification. What happens is that for every value-type a default constructor is created (by the compiler?) which initialized all members to zero (or null ).
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Is recursion a feature in and of itself?
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To answer your specific question: No, from the standpoint of learning a language, recursion isn't a feature. If your professor really docked you marks for using a "feature" he hadn't taught yet, that was wrong.
Reading between the lines, one possibility is that by using r...
How does the @property decorator work in Python?
I would like to understand how the built-in function property works. What confuses me is that property can also be used as a decorator, but it only takes arguments when used as a built-in function and not when used as a decorator.
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How to define two fields “unique” as couple
...ax_length=50)
class Meta:
unique_together = ('field1', 'field2',)
And in your case:
class Volume(models.Model):
id = models.AutoField(primary_key=True)
journal_id = models.ForeignKey(Journals, db_column='jid', null=True, verbose_name = "Journal")
volume_number = models.CharField('Vol...