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Compare object instances for equality by their attributes
...s:
>>> x == y
True
Note that implementing __eq__ will automatically make instances of your class unhashable, which means they can't be stored in sets and dicts. If you're not modelling an immutable type (i.e. if the attributes foo and bar may change value within the lifetime of your obje...
In what areas might the use of F# be more appropriate than C#? [closed]
... sweet spot for the language within enterprise software, namely algorithmically complex analysis of large data sets. My experience has been a very positive one. In particular:
Units of measure The industry I work in is littered with units. The equations I implemented (often of a geometric nature) d...
What are the barriers to understanding pointers and what can be done to overcome them? [closed]
...use address on it, and the memory block it references as the actual house. All sorts of operations can thus be easily explained.
I've added some Delphi code down below, and some comments where appropriate. I chose Delphi since my other main programming language, C#, does not exhibit things like mem...
How to assert output with nosetest/unittest in python?
...rarily replacing sys.stdout. I prefer the context manager because it wraps all the bookkeeping into a single function, so I don't have to re-write any try-finally code, and I don't have to write setup and teardown functions just for this.
import sys
from contextlib import contextmanager
from String...
jQuery UI “ $(”#datepicker“).datepicker is not a function”
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This error usually appears when you're missing a file from the jQuery UI set.
Double-check that you have all the files, the jQuery UI files as well as the CSS and images, and that they're in the correctly linked file/directory location o...
Elastic Search: how to see the indexed data
...lore your ElasticSearch cluster is to use elasticsearch-head.
You can install it by doing:
cd elasticsearch/
./bin/plugin -install mobz/elasticsearch-head
Then (assuming ElasticSearch is already running on your local machine), open a browser window to:
http://localhost:9200/_plugin/head/
Alte...
Using CMake, how do I get verbose output from CTest?
... which is using the Boost unit testing framework. This one binary contains all of the unit tests. I've added that binary to be run by CTest:
...
C++ preprocessor __VA_ARGS__ number of arguments
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This is actually compiler dependent, and not supported by any standard.
Here however you have a macro implementation that does the count:
#define PP_NARG(...) \
PP_NARG_(__VA_ARGS__,PP_RSEQ_N())
#define PP_NARG_(...) \
...
Should I make HTML Anchors with 'name' or 'id'?
When one wants to refer to some part of a webpage with the " http://example.com/#foo " method, should one use
14 Answers
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How can I implement a tree in Python?
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I came across this answer via Google. This library is really nice. I especially love the ability to use the mixin class to make an tree of any object!
– Rÿck Nöthing
Mar 8 '19 at 1:21
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