Code

Steve Coulson: interview question 1#10

Code

Open

sc3141 wants to merge 16 commits intopindropsecurity:masterpindropsecurity/backend_question_1:masterfrom sc3141:masterCopy head branch name to clipboard

+696

Commits

Commits on Apr 20, 2015

• added gitignore for omission of unwanted files.

  sc3141

  committed
  93c12ce

Commits on Apr 21, 2015

• I would have checked this initial file in right after .gitignore, but there was a tornado warning, and then, since the storm passed directly over my subdivision, I had to got home to check on pets …

  Show description for 0208167
  sc3141

  committed
  0208167

• removed underscore from name of file expr_tree.py

  sc3141

  committed
  baad651

• Added unittest module, exprtreetest. In exprtree, removed use of phrase 'abstract base class' as I was using the overloaded c++ meaning. replaced use of double quotes with single quotes. rearranged…

  Show description for e85e3d4
  sc3141

  committed
  e85e3d4

• Implemented class Num. Implemented class Operation as base class. Removed proscriptions of use (exceptions). Added unit tests for class Num and base class Operation.

  sc3141

  committed
  06cc5fd

• added specialized operation classes.

  sc3141

  committed
  7d62bb6

• Hey\! added some unit tests, which (with help from base class Operation), exposed some bugs in specializations of Operation (i.e. +,-,*,/). How about that\?\! Fixed python novice bug as follows: ma…

  Show description for 1941555
  sc3141

  committed
  1941555

• remove member 'line' from class Node and also concept of location as this was outside the core concept. also in class Node, made member 'token' private. In class ExprTreeError, made member 'msg' pr…

  Show description for fbec6ba
  sc3141

  committed
  fbec6ba

• made member Operation.operands private

  sc3141

  committed
  77f0f55

• added method Operation.arity. changed the return value of Operation.__str__

  sc3141

  committed
  fcd6e46

• fixed a bug in base exception class ExprTreeError in which not are references to member' __msg' had been renamed from 'msg'. In class Operation added method, term(), which provides access to indivi…

  Show description for 7b80256
  sc3141

  committed
  7b80256

• added tests pertaining to evaluation of expression tree.

  sc3141

  committed
  69689fe

Commits on Apr 22, 2015

• implement command line calculator to demonstrate functionality of exprtree module. changed exception throw by instance of class Num when value is not convertible to float (new error == NumError).

  sc3141

  committed
  3a1ebff

• added some more content to doc string. removed debugging print statements. modified program to allow identification of token in vicinity of error condition.

  sc3141

  committed
  ae0f466

• removed unused (or once used) import statements.

  sc3141

  committed
  a224daa

• my attempt at sql.

  sc3141

  committed
  35aa564