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Computed / calculated / virtual / derived columns in PostgreSQL
...- 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 int
, int2 int
, product bigint GENERATED ALW...
“for line in…” results in UnicodeDecodeError: 'utf-8' codec can't decode byte
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428
As suggested by Mark Ransom, I found the right encoding for that problem. The encoding was "ISO...
How do you debug PHP scripts? [closed]
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edited Mar 2 '16 at 5:37
community wiki
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What is the “__v” field in Mongoose
I'm using Mongoose version 3 with MongoDB version 2.2. I've noticed a __v field has started appearing in my MongoDB documents. Is it something to do with versioning? How is it used?
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PHP YAML Parsers [closed]
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Last updated: July 26th, 2017
Here's a summary of the state of YAML in PHP:
Wrappers to C libraries: You'll probably want these if you need sheer speed:
php-yaml: Wrapper for LibYAML. Available as a PECL extension; it is also the one on P...
What does ||= (or-equals) mean in Ruby?
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23 Answers
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horizontal scrollbar on top and bottom of table
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238
To simulate a second horizontal scrollbar on top of an element, put a "dummy" div above the el...
Parse JSON String into a Particular Object Prototype in JavaScript
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129
The current answers contain a lot of hand-rolled or library code. This is not necessary.
Use...
How to resolve “You need to have Ruby and Sass installed and in your PATH for this task to work” War
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205
Ok I got it. I just had to install Sass using gem install sass and now everything is fine...co...