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fixed error in factorial.py #1888

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fixed error in factorial.py #1888

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@SandersLin
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SandersLin commented Apr 17, 2020 •
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Describe your change:

factorial(11) returns index out of range. To implement memoization an auxiliary function is required.

  • Add an algorithm?
  • Fix a bug or typo in an existing algorithm?
  • Documentation change?

Checklist:

  • I have read CONTRIBUTING.md.
  • This pull request is all my own work -- I have not plagiarized.
  • I know that pull requests will not be merged if they fail the automated tests.
  • This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
  • All new Python files are placed inside an existing directory.
  • All filenames are in all lowercase characters with no spaces or dashes.
  • All functions and variable names follow Python naming conventions.
  • All function parameters and return values are annotated with Python type hints.
  • All functions have doctests that pass the automated testing.
  • All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation.
  • If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.
@SandersLin
Update factorial.py
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@us3rnotfound
us3rnotfound suggested changes May 13, 2020
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us3rnotfound left a comment

Recommend making factorial_aux a private function since no outside entity need use it.

Recommend putting the debug statements back in showing where to print result for debugging, although I noticed debugging it in that fashion causes docttest to print out a lot of example failed blocks.

Otherwise I think this change is good and it makes sense.
@cclauss
cclauss reviewed May 13, 2020
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dynamic_programming/factorial.py

def factorial_aux(num, result):

if num == 0 or num == 1:

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@cclauss

cclauss May 13, 2020

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if num == 0 or num == 1:
if num in (0, 1):

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@swapnanildutta

swapnanildutta Jun 1, 2020

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This makes more sense.
@swapnanildutta
swapnanildutta approved these changes Jun 1, 2020
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mateuszz0000 and others added 2 commits Jun 23, 2020
@mateuszz0000
Merge branch 'master' into patch-33
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updating DIRECTORY.md
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@TravisBuddy
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TravisBuddy commented Jun 23, 2020

Hey @SandersLin,
Something went wrong with the build.

TravisCI finished with status errored, which means the build failed because of something unrelated to the tests, such as a problem with a dependency or the build process itself.

View build log

TravisBuddy Request Identifier: 09604660-b535-11ea-aae7-0b05fcc524af
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