[CentralOH] 2016-04-01 道場 Scribbles 落書/惡文? euler #1 and leap day refactoring; dplyr dplython idiom truth iswhatever big mask and or & | && || op=

[jep200404 at columbus.rr.com]

for Python3: virualenv versus pyvenv versus venv
Python for Data Analysis
http://shop.oreilly.com/product/0636920023784.do
Models.Behaving.Badly.:
Why Confusing Illusion with Reality Can Lead to Disaster,
on Wall Street and in Life
https://www.goodreads.com/book/show/12378134-models-behaving-badly
manujeol at dojo:~$ python3
Python 3.4.3 (default, Oct 14 2015, 20:33:09)
[GCC 4.8.4] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from random import randint
>>> [randint(1, 999) for _ in range(3)]
[17, 4, 962]
>>>
manujeol at dojo:~$
http://dilbert.com/strip/2016-04-01

http://wozniaklab.com/
wp:Steve Wozniak
https://microbiology.osu.edu/people/wozniak.1
http://medicine.osu.edu/regenerativemedicine/wound_burn_trauma/danielwozniak/pages/index.aspx

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:Rock 'Em Sock 'Em Robots
Good Grief Charlie Brown https://www.youtube.com/watch?v=Hr2Bc5qMhE4

http://linuxgizmos.com/universal-laptop-shell-extends-phones-mini-pcs-and-sbcs/
Of course, we've seen this before. Tell them Ethan.

Refactored Project Euler #1 and a leapday challenge entry
need to publish notebooks

    either directly in own name or
    anonymously through me

Zombie SCO rises from the grave again
http://www.theregister.co.uk/2016/03/30/zombie_sco_rises_from_the_grave_iagaini/

Swedish student builds steam-powered Raspberry Pi
http://www.wired.co.uk/news/archive/2016-03/18/steam-powered-raspberry-pi

Bash on Windows. Repeat, Microsoft demos Bash on Windows
Is this an endorsement of open source or of the Unix philosophy?
http://www.theregister.co.uk/2016/03/30/bash_shell_comes_to_windows_10/
wp:Unix philosophy

r dplyr
https://cran.rstudio.com/web/packages/dplyr/vignettes/introduction.html

python dplython
Dplyr-style operations on top of pandas DataFrame.
https://github.com/dodger487/dplython
https://pypi.python.org/pypi/dplython/0.0.2

wp:Programming idiom

Python's concept of truth
C's concept of truth

man isalpha

the following is perfectly valid:
x += x
so is the following:
x *= x

from __future__ import print_function
x = 1
for _ in range(5):
    x += x
    print(x)

from __future__ import print_function
x = 1
for _ in range(5):
    x *= x
    print(x)

from __future__ import print_function
x = 2
for _ in range(5):
    x *= x
    print(x)

isalpha(c)
isalpha(c) & isalnum(c)
    dangerous misunderstanging of
        C: & and &&
        Python: & and and
n = 4
n = 1
n = 0
n = -1
(n>=0) and int(sqrt(n))
(n>=0) & int(sqrt(n))

for n in (4, 1, 0, -1):
    print((n>=0) and int(sqrt(n)))
    print((n>=0) & int(sqrt(n)))

one l

wp:The_Elements_of_Programming_Style#Lessons
wp:The Practice of Programming

a and b
    if not a
        return a
    else
        return b
    # Note that b is evaluated only if a is true.

compare to a & b

compare a or b with a | b
great examples of difference being important

looking around Columbus is absolutely stunning:
wp:Apple_Maps#Flyover_and_3D_maps

wp:Jacob Bronowski
wp:The Ascent of Man
name of castle with women

very cool: https://www.youtube.com/watch?v=tIl7UMUxKJo

http://www.fastcodesign.com/

wp:Zaha Hadid
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