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  1. Rules Repository
  2. RSPEC-2757 "=+" should not be used instead of "+="
  3. RSPEC-3775

JavaScript: Non-existent operators '=+', '=-' and '=!' should not be used

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    Details

    • Type: Language-Specification
    • Status: Active
    • Resolution: Unresolved
    • Labels:
      None
    • Impact:
      Unknown 'null' severity
    • Likelihood:
      Unknown 'null' severity
    • Default Quality Profiles:
      Sonar way, Sonar way recommended

      Description

      The use of operators pairs (=+, =- or =!) where the reversed, single operator was meant (+=, -= or !=) will compile and run, but not produce the expected results.

      This rule raises an issue when =+, =- and =! are used without any space between the two operators and when there is at least one whitespace after.

      Noncompliant Code Example

      let target =-5;
      let num = 3;
      
      target =- num;  // Noncompliant; target = -3. Is that really what's meant?
      target =+ num; // Noncompliant; target = 3
      

      Compliant Solution

      let target = -5;
      let num = 3;
      
      target = -num;  // Compliant; intent to assign inverse value of num is clear
      target += num;
      

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            Assignee:
            Unassigned Unassigned
            Reporter:
            pierre-yves.nicolas Pierre-Yves Nicolas
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              Dates

              Created:
              Updated: