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How do I make a composite key with SQL Server Management Studio?
...ies the right changes to whatever the database version is) and if you have more than one installation then you're in serious trouble as soon the databases won't have the same schema
– JonnyRaa
Jul 27 '16 at 12:11
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HttpServletRequest to complete URL
...lair: A StringBuffer is returned on purpose, so that you easily can add on more stash. Since this is specified on the javadoc, it would be extremely absurd of the implementation to expect that the returned StringBuffer would not be modified by the caller - hence, this is cool.
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DateTime.ToString() format that can be used in a filename or extension?
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You have a look at more examples/options here: geekzilla.co.uk/View00FF7904-B510-468C-A2C8-F859AA20581F.htm
– Kristof Claes
Sep 19 '12 at 17:47
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Escape double quotes in parameter
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Is there a regular expression to detect a valid regular expression?
...ion, such as PCRE, but that can't really be called regular expressions any more.
Indeed, a "recursive regular expression" is not a regular expression. But this an often-accepted extension to regex engines... Ironically, this extended regex doesn't match extended regexes.
"In theory, theory and...
What are good uses for Python3's “Function Annotations”
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It also reveals the Python influence on Swift even more.
– uchuugaka
Nov 3 '15 at 2:11
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C compiler for Windows? [closed]
...lution. Any ideas? I've looked at Dev-C++ from Bloodshed but looking for more options.
22 Answers
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How to read/write a boolean when implementing the Parcelable interface?
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No reason to use byte over int. byte is more verbose because of the cast: dest.writeInt(myBoolean ? 1 : 0);
– miguel
Jan 17 '15 at 2:31
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How to add column if not exists on PostgreSQL?
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This approach (EXCEPTION) is a bit more general, and can be employed for tasks which have no IF NOT EXISTS syntax - for example ALTER TABLE ... ADD CONSTRAINT.
– Tomasz Gandor
Apr 16 '19 at 9:51
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How to set a Django model field's default value to a function call / callable (e.g., a date relative
...ls.Model):
my_date = models.DateTimeField(default=get_default_my_date)
More information in the @simanas answer below
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