operators clear solution for Boolean Algebra by Cjkjvfnby - python coding challenges

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operators solution in Clear category for Boolean Algebra by Cjkjvfnby

from operator import and_, or_, xor, eq


def implication(x, y):
    return not x or y

OPERATIONS = {"conjunction": and_,
              "disjunction": or_,
              "implication": implication,
              "exclusive": xor,
              "equivalence": eq}


def boolean(x, y, operation):
    return OPERATIONS[operation](x, y)

Sept. 4, 2014

Comments:

aotus on Sept. 6, 2014, 6:53 a.m.
Nice, you didn't even have to define the functions yourself! I used the same dictionary lookup approach that you used, but I slavishly followed the Boolean logic formulas in the task description. Silly me.

lesenv on Nov. 18, 2014, 11:27 p.m.
that's what i did, too, aotus... nice job, Cjkjvfnby

Cjkjvfnby on Sept. 6, 2014, 9:53 a.m.
See it from other side. You just get knowlege about another module.

aotus on Nov. 20, 2014, 6:09 p.m.
Exactly right, and I appreciate the lesson. I have still not explored many parts of the Python standard library.

pynur on Oct. 8, 2014, 4:03 p.m.
I don't know this. Like.

marshall.zheng on Dec. 24, 2014, 9:17 a.m.
pythonic!

kryksyh on April 9, 2015, 6:44 p.m.
Good one, now I know about "operator" module. Love this site.

jstrawn on May 4, 2015, 2:20 p.m.
Sweet! "slavish" is a good descriptor, aotus. ;) Cjkivfnby, is this essentially a dictionary of function pointers? (Sorry, new to Py.) Nice solution!

kucherenkovova on Aug. 5, 2015, 1:20 p.m.
Sick! Good python programmer must know how to use google search properly because there's a huge possibility that the code is already done by someone and you just have to import it. Thumbs up

PyPoet on Aug. 22, 2015, 8:59 p.m.
The operator module was completely new to me and it actually didn't even occur to me to use a dictionary approach. Interesting alternative, even though within the scope of this task(!), I don't see a big advantage over if-statements. The idea of defining an extra function for implication doesn't appeal to me either. In any case: thanks for sharing and a lesson taught.

Tatjana48 on Sept. 10, 2015, 5:20 a.m.
In this program boolean(0,0,'implication') or boolean(0,1,'implication') return True

soma115 on Dec. 29, 2015, 1:39 p.m.
And why 1,0 and 1,1 returns 0 and 1? Strange...

jakow on Sept. 14, 2015, 7:26 p.m.
lazy :)

stilus2011 on Jan. 1, 2016, 10:46 p.m.
It's interesting, but unreadable solution! :)

ljy95135 on May 24, 2016, 9:05 a.m.
nice,use function like an object.

fenryxo on Feb. 5, 2019, 6:43 p.m.
A really nice idiomatic solution. Mine is almost the same. I use a `lambda` for implication and cast all results to `int` because equivalence and implication result in `bool`.

Look up in the Dict()

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