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stdlib/matrix.rb

Summary

Maintainability
F
4 days
Test Coverage

File matrix.rb has 1194 lines of code (exceeds 1000 allowed). Consider refactoring.
Wontfix

require "e2mmap.rb"

module ExceptionForMatrix # :nodoc:
  extend Exception2MessageMapper
  def_e2message(TypeError, "wrong argument type %s (expected %s)")
Severity: Major
Found in stdlib/matrix.rb - About 6 hrs to fix

    Method minor has a Cognitive Complexity of 23 (exceeds 5 allowed). Consider refactoring.
    Open

      def minor(*param)
    case param.size
    when 2
      row_range, col_range = param
      from_row = row_range.first
    Severity: Minor
    Found in stdlib/matrix.rb - About 3 hrs to fix

    Cognitive Complexity

    Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

    A method's cognitive complexity is based on a few simple rules:

    • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
    • Code is considered more complex for each "break in the linear flow of the code"
    • Code is considered more complex when "flow breaking structures are nested"

    Further reading

    Method ** has a Cognitive Complexity of 17 (exceeds 5 allowed). Consider refactoring.
    Open

      def **(other)
    case other
    when Integer
      x = self
      if other <= 0
    Severity: Minor
    Found in stdlib/matrix.rb - About 2 hrs to fix

    Cognitive Complexity

    Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

    A method's cognitive complexity is based on a few simple rules:

    • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
    • Code is considered more complex for each "break in the linear flow of the code"
    • Code is considered more complex when "flow breaking structures are nested"

    Further reading

    Method index has a Cognitive Complexity of 14 (exceeds 5 allowed). Consider refactoring.
    Open

      def index(*args)
    raise ArgumentError, "wrong number of arguments(#{args.size} for 0-2)" if args.size > 2
    which = (args.size == 2 || SELECTORS.include?(args.last)) ? args.pop : :all
    return to_enum :find_index, which, *args unless block_given? || args.size == 1
    if args.size == 1
    Severity: Minor
    Found in stdlib/matrix.rb - About 1 hr to fix

    Cognitive Complexity

    Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

    A method's cognitive complexity is based on a few simple rules:

    • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
    • Code is considered more complex for each "break in the linear flow of the code"
    • Code is considered more complex when "flow breaking structures are nested"

    Further reading

    Method laplace_expansion has a Cognitive Complexity of 14 (exceeds 5 allowed). Consider refactoring.
    Open

      def laplace_expansion(row: nil, column: nil)
    num = row || column

    if !num || (row && column)
      raise ArgumentError, "exactly one the row or column arguments must be specified"
    Severity: Minor
    Found in stdlib/matrix.rb - About 1 hr to fix

    Cognitive Complexity

    Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

    A method's cognitive complexity is based on a few simple rules:

    • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
    • Code is considered more complex for each "break in the linear flow of the code"
    • Code is considered more complex when "flow breaking structures are nested"

    Further reading

    Method permutation? has a Cognitive Complexity of 14 (exceeds 5 allowed). Consider refactoring.
    Open

      def permutation?
    Matrix.Raise ErrDimensionMismatch unless square?
    cols = Array.new(column_count)
    rows.each_with_index do |row, i|
      found = false
    Severity: Minor
    Found in stdlib/matrix.rb - About 1 hr to fix

    Cognitive Complexity

    Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

    A method's cognitive complexity is based on a few simple rules:

    • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
    • Code is considered more complex for each "break in the linear flow of the code"
    • Code is considered more complex when "flow breaking structures are nested"

    Further reading

    Method each_with_index has 47 lines of code (exceeds 30 allowed). Consider refactoring.
    Open

      def each_with_index(which = :all) # :yield: e, row, column
    return to_enum :each_with_index, which unless block_given?
    last = column_count - 1
    case which
    when :all
    Severity: Minor
    Found in stdlib/matrix.rb - About 1 hr to fix

      Method each has 46 lines of code (exceeds 30 allowed). Consider refactoring.
      Open

        def each(which = :all) # :yield: e
    return to_enum :each, which unless block_given?
    last = column_count - 1
    case which
    when :all
      Severity: Minor
      Found in stdlib/matrix.rb - About 1 hr to fix

        Method inverse_from has 37 lines of code (exceeds 30 allowed). Consider refactoring.
        Open

          def inverse_from(src) # :nodoc:
    last = row_count - 1
    a = src.to_a

    0.upto(last) do |k|
        Severity: Minor
        Found in stdlib/matrix.rb - About 1 hr to fix

          Method orthogonal? has a Cognitive Complexity of 11 (exceeds 5 allowed). Consider refactoring.
          Open

            def orthogonal?
    Matrix.Raise ErrDimensionMismatch unless square?
    rows.each_with_index do |row, i|
      column_count.times do |j|
        s = 0
          Severity: Minor
          Found in stdlib/matrix.rb - About 1 hr to fix

          Cognitive Complexity

          Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

          A method's cognitive complexity is based on a few simple rules:

          • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
          • Code is considered more complex for each "break in the linear flow of the code"
          • Code is considered more complex when "flow breaking structures are nested"

          Further reading

          Method cross_product has a Cognitive Complexity of 11 (exceeds 5 allowed). Consider refactoring.
          Open

            def cross_product(*vs)
    raise ErrOperationNotDefined, "cross product is not defined on vectors of dimension #{size}" unless size >= 2
    raise ArgumentError, "wrong number of arguments (#{vs.size} for #{size - 2})" unless vs.size == size - 2
    vs.each do |v|
      raise TypeError, "expected Vector, got #{v.class}" unless v.is_a? Vector
          Severity: Minor
          Found in stdlib/matrix.rb - About 1 hr to fix

          Cognitive Complexity

          Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

          A method's cognitive complexity is based on a few simple rules:

          • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
          • Code is considered more complex for each "break in the linear flow of the code"
          • Code is considered more complex when "flow breaking structures are nested"

          Further reading

          Method unitary? has a Cognitive Complexity of 11 (exceeds 5 allowed). Consider refactoring.
          Open

            def unitary?
    Matrix.Raise ErrDimensionMismatch unless square?
    rows.each_with_index do |row, i|
      column_count.times do |j|
        s = 0
          Severity: Minor
          Found in stdlib/matrix.rb - About 1 hr to fix

          Cognitive Complexity

          Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

          A method's cognitive complexity is based on a few simple rules:

          • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
          • Code is considered more complex for each "break in the linear flow of the code"
          • Code is considered more complex when "flow breaking structures are nested"

          Further reading

          Method inverse_from has a Cognitive Complexity of 11 (exceeds 5 allowed). Consider refactoring.
          Open

            def inverse_from(src) # :nodoc:
    last = row_count - 1
    a = src.to_a

    0.upto(last) do |k|
          Severity: Minor
          Found in stdlib/matrix.rb - About 1 hr to fix

          Cognitive Complexity

          Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

          A method's cognitive complexity is based on a few simple rules:

          • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
          • Code is considered more complex for each "break in the linear flow of the code"
          • Code is considered more complex when "flow breaking structures are nested"

          Further reading

          Method determinant has 31 lines of code (exceeds 30 allowed). Consider refactoring.
          Open

            def determinant
    Matrix.Raise ErrDimensionMismatch unless square?
    m = @rows
    case row_count
      # Up to 4x4, give result using Laplacian expansion by minors.
          Severity: Minor
          Found in stdlib/matrix.rb - About 1 hr to fix

            Method convert_to_array has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
            Open

                def convert_to_array(obj, copy = false) # :nodoc:
      case obj
      when Array
        copy ? obj.dup : obj
      when Vector
            Severity: Minor
            Found in stdlib/matrix.rb - About 55 mins to fix

            Cognitive Complexity

            Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

            A method's cognitive complexity is based on a few simple rules:

            • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
            • Code is considered more complex for each "break in the linear flow of the code"
            • Code is considered more complex when "flow breaking structures are nested"

            Further reading

            Method each_with_index has a Cognitive Complexity of 8 (exceeds 5 allowed). Consider refactoring.
            Open

              def each_with_index(which = :all) # :yield: e, row, column
    return to_enum :each_with_index, which unless block_given?
    last = column_count - 1
    case which
    when :all
            Severity: Minor
            Found in stdlib/matrix.rb - About 45 mins to fix

            Cognitive Complexity

            Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

            A method's cognitive complexity is based on a few simple rules:

            • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
            • Code is considered more complex for each "break in the linear flow of the code"
            • Code is considered more complex when "flow breaking structures are nested"

            Further reading

            Method each has a Cognitive Complexity of 8 (exceeds 5 allowed). Consider refactoring.
            Open

              def each(which = :all) # :yield: e
    return to_enum :each, which unless block_given?
    last = column_count - 1
    case which
    when :all
            Severity: Minor
            Found in stdlib/matrix.rb - About 45 mins to fix

            Cognitive Complexity

            Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

            A method's cognitive complexity is based on a few simple rules:

            • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
            • Code is considered more complex for each "break in the linear flow of the code"
            • Code is considered more complex when "flow breaking structures are nested"

            Further reading

            Method combine has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
            Open

              def Matrix.combine(*matrices)
    return to_enum(__method__, *matrices) unless block_given?

    return Matrix.empty if matrices.empty?
    matrices.map!(&CoercionHelper.method(:coerce_to_matrix))
            Severity: Minor
            Found in stdlib/matrix.rb - About 35 mins to fix

            Cognitive Complexity

            Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

            A method's cognitive complexity is based on a few simple rules:

            • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
            • Code is considered more complex for each "break in the linear flow of the code"
            • Code is considered more complex when "flow breaking structures are nested"

            Further reading

            Method column has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
            Open

              def column(j) # :yield: e
    if block_given?
      return self if j >= column_count || j < -column_count
      row_count.times do |i|
        yield @rows[i][j]
            Severity: Minor
            Found in stdlib/matrix.rb - About 35 mins to fix

            Cognitive Complexity

            Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

            A method's cognitive complexity is based on a few simple rules:

            • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
            • Code is considered more complex for each "break in the linear flow of the code"
            • Code is considered more complex when "flow breaking structures are nested"

            Further reading

            Method independent? has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
            Open

              def Vector.independent?(*vs)
    vs.each do |v|
      raise TypeError, "expected Vector, got #{v.class}" unless v.is_a?(Vector)
      Vector.Raise ErrDimensionMismatch unless v.size == vs.first.size
    end
            Severity: Minor
            Found in stdlib/matrix.rb - About 35 mins to fix

            Cognitive Complexity

            Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

            A method's cognitive complexity is based on a few simple rules:

            • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
            • Code is considered more complex for each "break in the linear flow of the code"
            • Code is considered more complex when "flow breaking structures are nested"

            Further reading

            Method normal? has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
            Open

              def normal?
    Matrix.Raise ErrDimensionMismatch unless square?
    rows.each_with_index do |row_i, i|
      rows.each_with_index do |row_j, j|
        s = 0
            Severity: Minor
            Found in stdlib/matrix.rb - About 25 mins to fix

            Cognitive Complexity

            Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

            A method's cognitive complexity is based on a few simple rules:

            • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
            • Code is considered more complex for each "break in the linear flow of the code"
            • Code is considered more complex when "flow breaking structures are nested"

            Further reading

            Method first_minor has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
            Open

              def first_minor(row, column)
    raise RuntimeError, "first_minor of empty matrix is not defined" if empty?

    unless 0 <= row && row < row_count
      raise ArgumentError, "invalid row (#{row.inspect} for 0..#{row_count - 1})"
            Severity: Minor
            Found in stdlib/matrix.rb - About 25 mins to fix

            Cognitive Complexity

            Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

            A method's cognitive complexity is based on a few simple rules:

            • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
            • Code is considered more complex for each "break in the linear flow of the code"
            • Code is considered more complex when "flow breaking structures are nested"

            Further reading

            Method rank has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
            Open

              def rank
    # We currently use Bareiss' multistep integer-preserving gaussian elimination
    # (see comments on determinant)
    a = to_a
    last_column = column_count - 1
            Severity: Minor
            Found in stdlib/matrix.rb - About 25 mins to fix

            Cognitive Complexity

            Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

            A method's cognitive complexity is based on a few simple rules:

            • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
            • Code is considered more complex for each "break in the linear flow of the code"
            • Code is considered more complex when "flow breaking structures are nested"

            Further reading

            Method coerce_to has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
            Open

                def self.coerce_to(obj, cls, meth) # :nodoc:
      return obj if obj.kind_of?(cls)
      raise TypeError, "Expected a #{cls} but got a #{obj.class}" unless obj.respond_to? meth
      begin
        ret = obj.__send__(meth)
            Severity: Minor
            Found in stdlib/matrix.rb - About 25 mins to fix

            Cognitive Complexity

            Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

            A method's cognitive complexity is based on a few simple rules:

            • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
            • Code is considered more complex for each "break in the linear flow of the code"
            • Code is considered more complex when "flow breaking structures are nested"

            Further reading

            Similar blocks of code found in 2 locations. Consider refactoring.
            Open

              def +(m)
    case m
    when Numeric
      Matrix.Raise ErrOperationNotDefined, "+", self.class, m.class
    when Vector
            Severity: Major
            Found in stdlib/matrix.rb and 1 other location - About 1 hr to fix
            stdlib/matrix.rb on lines 953..971

            Duplicated Code

            Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

            Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

            When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

            Tuning

            This issue has a mass of 66.

            We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

            The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

            If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

            See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

            Refactorings

            Further Reading

            Similar blocks of code found in 2 locations. Consider refactoring.
            Open

              def -(m)
    case m
    when Numeric
      Matrix.Raise ErrOperationNotDefined, "-", self.class, m.class
    when Vector
            Severity: Major
            Found in stdlib/matrix.rb and 1 other location - About 1 hr to fix
            stdlib/matrix.rb on lines 926..944

            Duplicated Code

            Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

            Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

            When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

            Tuning

            This issue has a mass of 66.

            We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

            The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

            If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

            See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

            Refactorings

            Further Reading

            Similar blocks of code found in 2 locations. Consider refactoring.
            Open

                  (k+1).upto(last) do |i|
        ai = a[i]
        (k+1).upto(last) do |j|
          ai[j] =  (pivot * ai[j] - ai[k] * a[k][j]) / previous_pivot
            Severity: Minor
            Found in stdlib/matrix.rb and 1 other location - About 45 mins to fix
            stdlib/matrix.rb on lines 1240..1243

            Duplicated Code

            Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

            Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

            When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

            Tuning

            This issue has a mass of 39.

            We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

            The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

            If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

            See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

            Refactorings

            Further Reading

            Similar blocks of code found in 2 locations. Consider refactoring.
            Open

              def -(v)
    case v
    when Vector
      Vector.Raise ErrDimensionMismatch if size != v.size
      els = collect2(v) {|v1, v2|
            Severity: Minor
            Found in stdlib/matrix.rb and 1 other location - About 45 mins to fix
            stdlib/matrix.rb on lines 1930..1941

            Duplicated Code

            Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

            Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

            When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

            Tuning

            This issue has a mass of 39.

            We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

            The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

            If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

            See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

            Refactorings

            Further Reading

            Similar blocks of code found in 2 locations. Consider refactoring.
            Open

              def +(v)
    case v
    when Vector
      Vector.Raise ErrDimensionMismatch if size != v.size
      els = collect2(v) {|v1, v2|
            Severity: Minor
            Found in stdlib/matrix.rb and 1 other location - About 45 mins to fix
            stdlib/matrix.rb on lines 1948..1959

            Duplicated Code

            Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

            Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

            When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

            Tuning

            This issue has a mass of 39.

            We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

            The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

            If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

            See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

            Refactorings

            Further Reading

            Similar blocks of code found in 2 locations. Consider refactoring.
            Open

                    (pivot_row+1).upto(last_row) do |i|
           ai = a[i]
           (k+1).upto(last_column) do |j|
             ai[j] =  (pivot * ai[j] - ai[k] * a[pivot_row][j]) / previous_pivot
            Severity: Minor
            Found in stdlib/matrix.rb and 1 other location - About 45 mins to fix
            stdlib/matrix.rb on lines 1184..1187

            Duplicated Code

            Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

            Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

            When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

            Tuning

            This issue has a mass of 39.

            We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

            The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

            If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

            See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

            Refactorings

            Further Reading

            Similar blocks of code found in 2 locations. Consider refactoring.
            Open

                def +(other)
      case other
      when Numeric
        Scalar.new(@value + other)
      when Vector, Matrix
            Severity: Minor
            Found in stdlib/matrix.rb and 1 other location - About 20 mins to fix
            stdlib/matrix.rb on lines 1595..1602

            Duplicated Code

            Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

            Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

            When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

            Tuning

            This issue has a mass of 27.

            We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

            The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

            If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

            See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

            Refactorings

            Further Reading

            Similar blocks of code found in 2 locations. Consider refactoring.
            Open

                def -(other)
      case other
      when Numeric
        Scalar.new(@value - other)
      when Vector, Matrix
            Severity: Minor
            Found in stdlib/matrix.rb and 1 other location - About 20 mins to fix
            stdlib/matrix.rb on lines 1584..1591

            Duplicated Code

            Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

            Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

            When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

            Tuning

            This issue has a mass of 27.

            We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

            The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

            If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

            See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

            Refactorings

            Further Reading

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