[CentralOH] 2017-06-22 道場 Scribbles 落書/惡文? refactoring; code valid in three languages; spaces v tabs; numberphile computerphile; thinking; hackerrank; i, j, k

[jep200404 at columbus.rr.com]

wp:Code refactoring

    By continuously improving the design of code, we make it easier and easier
    to work with. This is in sharp contrast to what typically happens: little
    refactoring and a great deal of attention paid to expediently adding new
    features. If you get into the hygienic habit of refactoring continuously,
    you'll find that it is easier to extend and maintain code.

    — Joshua Kerievsky, Refactoring to Patterns

https://en.wikipedia.org/wiki/Simple_syrup#Simple_syrup

Another reason to use Python!
Software dev bombshell: Programmers who use spaces earn MORE than those who use tabs
Well, of course – anyone using tabs should be paid zero
https://www.theregister.co.uk/2017/06/16/spaces_vs_tabs/

PEP8 versus Linux kernel versus Go
PEP8 prefers spaces over tabs for indentation
https://www.python.org/dev/peps/pep-0008/
Linux prefers tabs over spaces for indentation
https://www.kernel.org/doc/html/latest/process/coding-style.html#indentation
tab mandate?
https://github.com/golang/go/issues/7101
makefiles require tabs in some places

The following program is valid in fortran77, C, and shell.

    http://www.ioccc.org/1986/applin/applin.c

Write a program that is valid in Python 
and at least two of fortran77, C, or shell.

Resources for getting started with Python and machine learning
https://opensource.com/article/17/6/resources-getting-started-python-and-machine-learning

numberphile and computerphile on youtube

wp:Thinking, Fast and Slow

Slow

wp: prefix means Wikipedia
To get good answers, consider following the advice in the links below.
http://catb.org/~esr/faqs/smart-questions.html
http://web.archive.org/web/20090627155454/www.greenend.org.uk/rjk/2000/06/14/quoting.html

wp:HackerRank
hackerrank.com
fibonacci
factorial

instant
https://pypi.python.org/pypi/instant/
http://fenics.readthedocs.io/projects/instant/en/latest/
Instant is a Python module that allows for instant inlining of C and C++ code
in Python. It is a small Python module built on top of SWIG and Distutils.

Using i, j, and k as index variables is derived from hundreds of year of math.
I learned that from Brandon.
Which presentation of his talks about that?
wp:Summation