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  1. Rules Repository
  2. RSPEC-3967

Multidimensional arrays should not be used

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    Details

    • Type: Code Smell Detection
    • Status: Active
    • Resolution: Unresolved
    • Labels:
    • Message:
      Change this multidimensional array to a jagged array.
    • Highlighting:
      Hide

      Array declaration

      Show
      Array declaration
    • Default Severity:
      Minor
    • Impact:
      Low
    • Likelihood:
      Low
    • Covered Languages:
      C#
    • Irrelevant for Languages:
      ABAP, C, C++, Cobol, CSS, Flex, HTML, Java, JavaScript, Objective-C, PHP, PL/I, PL/SQL, Python, RPG, Swift, T-SQL, VB.Net, VB6, XML
    • Remediation Function:
      Constant/Issue
    • Constant Cost:
      5min
    • Analysis Scope:
      Main Sources, Test Sources
    • FxCop:
      PreferJaggedArraysOverMultidimensional, CA1814

      Description

      A jagged array is an array whose elements are arrays. It is recommended over a multidimensional array because the arrays that make up the elements can be of different sizes, which avoids wasting memory space.

      Noncompliant Code Example

      int [,] myArray =  // Noncompliant
          {
              {1,2,3,4},
              {5,6,7,0},
              {8,0,0,0},
              {9,0,0,0}
          };
      // ...
      myArray[1,1] = 0;
      

      Compliant Solution

      int[][] myArray = 
          { 
              new int[] {1,2,3,4},
              new int[] {5,6,7},
              new int[] {8},
              new int[] {9}
          };
      // ...
      myArray[1][1] = 0;
      

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            Assignee:
            Unassigned Unassigned
            Reporter:
            jeanchristophe.collet Jean-Christophe Collet (Inactive)
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              Dates

              Created:
              Updated: