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When do we need curly braces around shell variables?
In shell scripts, when do we use {} when expanding variables?
7 Answers
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What is the difference between Digest and Basic Authentication?
What is the difference between Digest and Basic Authentication ?
4 Answers
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Purpose of Django setting ‘SECRET_KEY’
...ly is the point of the SECRET_KEY in django? I did a few google searches and checked out the docs ( https://docs.djangoproject.com/en/dev/ref/settings/#secret-key ), but I was looking for a more in-depth explanation of this, and why it is required.
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Django connection to PostgreSQL: “Peer authentication failed”
...oticed it had to do with my connection settings. Went back to settings.py, and saw I did not have a Host setup. Add localhost and voila.
My settings.py did not have a HOST for MySQL database, but I needed to add one for PostgreSQL to work.
In my case, I added localhost to the HOST setting and it w...
How to list all installed packages and their versions in Python?
Is there a way in Python to list all installed packages and their versions?
11 Answers
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When to use NSInteger vs. int
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The simplest way according to Apple manual is casting value to the biggest numeric type long long. So all numeric types will use same type specifier.
– eonil
Jul 21 '12 at 19:24
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Computed / calculated / virtual / derived columns in PostgreSQL
... Postgres 11 generated columns are not supported - as defined in the SQL standard and implemented by some RDBMS including DB2, MySQL and Oracle. Nor the similar "computed columns" of SQL Server.
STORED generated columns are introduced with Postgres 12. Trivial example:
CREATE TABLE tbl (
int1 ...
Is there a performance difference between i++ and ++i in C?
Is there a performance difference between i++ and ++i if the resulting value is not used?
14 Answers
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How to properly add cross-site request forgery (CSRF) token using PHP
...o add some security to the forms on my website. One of the forms uses AJAX and the other is a straightforward "contact us" form. I'm trying to add a CSRF token. The problem I'm having is that the token is only showing up in the HTML "value" some of the time. The rest of the time, the value is empty....
How do you test a public/private DSA keypair?
... that a given private key matches a given public key? I have a few *.pub and a few *.key files, and I need to check which go with which.
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