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Merged
merged 21 commits into from
Jun 10, 2023
Merged

Create count negative numbers in matrix algorithm #8813

merged 21 commits into from
Jun 10, 2023

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CaedenPH
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@CaedenPH CaedenPH commented Jun 8, 2023

Describe your change:

Three implementations of this algorithm are implemented and benchmarked together with doctests

  • 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 include at least one URL that points to Wikipedia or another similar explanation.
  • If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

@algorithms-keeper algorithms-keeper bot added require tests Tests [doctest/unittest/pytest] are required require type hints https://docs.python.org/3/library/typing.html labels Jun 8, 2023
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@algorithms-keeper algorithms-keeper bot added the awaiting reviews This PR is ready to be reviewed label Jun 8, 2023
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CaedenPH commented Jun 8, 2023

Note this pr supposedly has lack of tests however the benchmark function shouldn't have doctests anyway
https://github.com/TheAlgorithms/Python/blob/master/ciphers/atbash.py#L41
As shown, this benchmark function doesnt have doctests either

@algorithms-keeper algorithms-keeper bot removed the tests are failing Do not merge until tests pass label Jun 8, 2023
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cclauss commented Jun 9, 2023

When would we want to use this algorithm?

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matrix/count_negative_numbers_in_sorted_matrix.py Outdated
@@ -0,0 +1,164 @@
"""
Given an `m x n` matrix grid which is sorted in non-increasing order
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Should there be a validate_matrix(matrix) function? We do not need to run it everywhere but we should have it if we want to validate test input.

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Update matrix/count_negative_numbers_in_sorted_matrix.py
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Co-authored-by: Christian Clauss <cclauss@me.com>
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Update matrix/count_negative_numbers_in_sorted_matrix.py
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CaedenPH commented Jun 9, 2023

When would we want to use this algorithm?

@cclauss If you have a grid of sorted numbers in descending order in a matrix, this algorithm can be used to count the number of negative numbers. Not sure when someone would want to use it, but then again when would someone want to use the quine from other/quine?
As far as I'm aware this repository is just about algorithms, not necessarily useful ones.

To answer your previous comment about validating the matrix, I don't think that is necessary. For searches that require sorted arrays, there aren't checks to ensure that those arrays are sorted so I think indicating that the matrix must be sorted is good enough

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This is looking cool!!

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Update matrix/count_negative_numbers_in_sorted_matrix.py
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CaedenPH and others added 3 commits June 10, 2023 12:40
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Update matrix/count_negative_numbers_in_sorted_matrix.py
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Update matrix/count_negative_numbers_in_sorted_matrix.py
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Update matrix/count_negative_numbers_in_sorted_matrix.py
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@github-actions github-actions bot force-pushed the create-count-negative-numbers-in-matrix branch 2 times, most recently from 0d8a616 to a55db73 Compare June 10, 2023 11:41
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@algorithms-keeper algorithms-keeper bot added tests are failing Do not merge until tests pass and removed tests are failing Do not merge until tests pass labels Jun 10, 2023
@CaedenPH CaedenPH requested a review from cclauss June 10, 2023 11:53
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@cclauss All changes have been implemented and tests are passing

@cclauss cclauss enabled auto-merge (squash) June 10, 2023 12:17
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Nice! Thanks for doing this.

@cclauss cclauss merged commit daa0c8f into TheAlgorithms:master Jun 10, 2023
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cclauss commented Jun 10, 2023

I have never figured out https://docs.python.org/3/library/bisect.html but it would be interesting to benchmark against an implementation that leveraged it.

sedatguzelsemme pushed a commit to sedatguzelsemme/Python that referenced this pull request Sep 15, 2024
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Create count negative numbers in matrix algorithm (TheAlgorithms#8813)
c26f2ef 
* updating DIRECTORY.md

* feat: Count negative numbers in sorted matrix

* updating DIRECTORY.md

* chore: Fix pre-commit

* refactor: Combine functions into iteration

* style: Reformat reference

* feat: Add timings of each implementation

* chore: Fix problems with algorithms-keeper bot

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* test: Remove doctest from benchmark function

* Update matrix/count_negative_numbers_in_sorted_matrix.py

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update matrix/count_negative_numbers_in_sorted_matrix.py

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update matrix/count_negative_numbers_in_sorted_matrix.py

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update matrix/count_negative_numbers_in_sorted_matrix.py

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update matrix/count_negative_numbers_in_sorted_matrix.py

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update matrix/count_negative_numbers_in_sorted_matrix.py

Co-authored-by: Christian Clauss <cclauss@me.com>

* refactor: Use sum instead of large iteration

* refactor: Use len not sum

* Update count_negative_numbers_in_sorted_matrix.py

---------

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