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Create unique constraint with null columns
...or may not be useful. In extreme situations it might even help to maintain all three indexes (the two partial ones and a total on top).
Aside: I advise not to use mixed case identifiers in PostgreSQL.
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Can I prevent the Firefox developer tools network panel from clearing on page reload?
...wonder how could they possibly do such a bad job cloning firebug. Which is all they really needed to do. Those guys must be blind or something.
– Tomáš Zato - Reinstate Monica
May 27 '17 at 22:14
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Regex not operator
...: lookahead) this doesn't (hence: negative) match this. But it doesn't actually consume the characters it matches (hence: zero-width).
There are actually 4 combinations of lookarounds with 2 axes:
lookbehind / lookahead : specifies if the characters before or after the point are considered
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How to get the sizes of the tables of a MySQL database?
I can run this query to get the sizes of all tables in a MySQL database:
16 Answers
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Copy constructor for a class with unique_ptr
How do I implement a copy constructor for a class that has a unique_ptr member variable? I am only considering C++11.
6 A...
ActiveModel::ForbiddenAttributesError when creating new user
...mit(:what, :ever)
end
Update:
Here's a continuation project for CanCan called CanCanCan, which looks promising:
CanCanCan
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How can I display a list view in an Android Alert Dialog?
...this items? i'm looking for hours for a popup menu solution which works on all api levels
– wutzebaer
Jul 22 '13 at 21:31
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ImportError: No module named apiclient.discovery
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You should be able to get these dependencies with this simple install:
sudo pip install --upgrade google-api-python-client
This is described on the quick start page for python.
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Tool to read and display Java .class versions
...ead the class file signature and get these values without a 3rd party API. All you need to do is read the first 8 bytes.
ClassFile {
u4 magic;
u2 minor_version;
u2 major_version;
For class file version 51.0 (Java 7), the opening bytes are:
CA FE BA BE 00 00 00 33
...where 0xCAFEBAB...
How to solve “Fatal error: Class 'MySQLi' not found”?
...amazon linux, it would be something like sudo yum install php56-mysqlnd.x86_64 (pick the one matching to which version of php you have installed)
– auspicious99
Dec 3 '18 at 10:46
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