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Difference Between Select and SelectMany
I've been searching the difference between Select and SelectMany but I haven't been able to find a suitable answer. I need to learn the difference when using LINQ To SQL but all I've found are standard array examples.
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C# - Selectively suppress custom Obsolete warnings
...on - introduce a new build configuration that doesn't have them as errors, and only run the unit tests there. Or (ugly) use reflection...
– Jon Skeet
Aug 14 '19 at 10:30
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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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How to create an array of 20 random bytes?
How can I create an array of 20 random bytes in Java?
6 Answers
6
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Programmatically open new pages on Tabs
... Firefox tip, now I have updated my TargetKiller addon to remove "_newtab" and "newtab". :P
– thenonhacker
Jan 9 '09 at 9:38
1
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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 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...
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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Should a retrieval method return 'null' or throw an exception when it can't produce the return value
...uld mean that there was a problem.
If the value can be missing or present and both are valid for the application logic then return a null.
More important: What do you do other places in the code? Consistency is important.
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Install an apk file from command prompt?
I want to install a file using the Windows command line. First I want to build after compiling all the .jar files to create an .apk file for an Android application without using Eclipse.
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