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What is /dev/null 2>&1?
...nal. It is because we are not redirecting error output to /dev/null, so in order to redirect error output as well, it is required to add 2>&1:
$ ls -l file_doesnot_exists > /dev/null 2>&1
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How to use the pass statement?
... In such cases, the block may contain pass in addition to the docstring in order to say “This is indeed intended to do nothing.”, for example in pebl:
class ParsingError(Exception):
"""Error encountered while parsing an ill-formed datafile."""
pass
In some cases, pass is used as a pla...
What Makes a Good Unit Test? [closed]
...blem.
Tests should not rely on each other - Isolated. No assumptions about order of test execution. Ensure 'clean slate' before each test by using setup/teardown appropriately
Professional: In the long run you'll have as much test code as production (if not more), therefore follow the same standard...
How to reset postgres' primary key sequence when it falls out of sync?
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@Valery: But in order to avoid gaps mentioned by @mikl two comments above, you need SELECT setval('your_table_id_seq', coalesce((select max(id)+1 from your_table), 1), false);
– Antony Hatchkins
Nov 9 '...
What is the standard naming convention for html/css ids and classes?
...at describe the object can also fall into four categories (which should be ordered from left to right):
Object, Object-Descriptor, Action, and Action-Descriptor.
car - a noun, and an object
new - an adjective, and an object-descriptor that describes the object in more detail
turned - a verb,...
How does one get started with procedural generation?
...eneration techniques have been used to:
simulate the growth of cities in order to plan for traffic management
to simulate the growth of blood vessels
SpeedTree is used in movies and architectural presentations
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How to get the name of the current method from code [duplicate]
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+1 because using reflection is several order of magnitude faster than using StackTrace.
– Giuseppe Romagnuolo
Feb 7 '14 at 22:53
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What is the difference between SAX and DOM?
...and "event-based" refers to the parsing method.
Maybe a small recap is in order:
The document object model (DOM) is an abstract data model that describes a hierarchical, tree-based document structure; a document tree consists of nodes, namely element, attribute and text nodes (and some others). N...
In Docker, what's the difference between a container and an image? [duplicate]
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An image is an ordered collection of root filesystem changes and the corresponding execution parameters for use within a container runtime. Images are read-only.
https://docs.docker.com/glossary/?term=image
A container is an active (or ...
Android - Package Name convention
...l files while developing on android).
The reason for having it in reverse order is to do with the layout on the storage media. If you consider each period ('.') in the application name as a path separator, all applications from a publisher would sit together in the path hierarchy.
So, for instance,...