[vc_row][vc_column][vc_btn title=”SOFTWARE RESILIENCY” style=”flat” color=”black” i_icon_fontawesome=”fa fa-shield” add_icon=”true” link=”url:http%3A%2F%2Fdoc.casthighlight.com%2Fsoftware-resiliency%2F|||”][vc_btn title=”CODE RELIABILITY” style=”outline” color=”black” i_icon_fontawesome=”fa fa-code” add_icon=”true” link=”url:http%3A%2F%2Fdoc.casthighlight.com%2Fcategory%2Fproduct%2Findicators-methodology%2Fcode-insights%2Fsoftware-resiliency%2Fcode-reliability%2F|||”][vc_empty_space height=”12px”][vc_row_inner][vc_column_inner][vc_column_text]

Why you should care

[/vc_column_text][vc_column_text]Destructuring assignment are a practical sugar syntax, but due to dynamic typing, ommitting the parentheses lead to a syntactically correct, but however functionnally incorrect, implementation.[/vc_column_text][vc_empty_space][/vc_column_inner][/vc_row_inner][vc_empty_space height=”12px”][vc_empty_space][vc_separator][vc_column_text]

How we detect

[/vc_column_text][vc_column_text]CAST Highlight counts one occurrence each time a variable is initialized with a tab, variable (or function call) in the following context :

• the variable is preceded by another declaration on the same line
• the variables are not inside a destructuring parentheses syntax.

    def a, b = [1, 2]              // +1 VIOLATION (bad, b is null)
    def c, d, e = [1, 2, 3] // +1 VIOLATION  (bad, c and d are null)
    def a, b = functionReturningTad()  // +1 VIOLATION (bad, b is null, even if the function is returning a tab!!)
    class MyClass {
        def a, b, c = [1, 2, 3]  // +1 VIOLATION (bad, a and b are null)
    }
    
    def x = [1, 2, 3]       // ok
    def (f, g) = [1, 2]    // ok
    (a, b, c) = [1, 2, 3]  // ok

[/vc_column_text][vc_empty_space][vc_separator][vc_column_text]

References

[/vc_column_text][vc_column_text]https://codenarc.org/codenarc-rules-groovyism.html#confusingmultiplereturns-rule[/vc_column_text][vc_empty_space][vc_row_inner][vc_column_inner][vc_single_image image=”5362″ img_size=”full”][vc_column_text]

[/vc_column_text][vc_empty_space height=”16px”][vc_btn title=”SEE FEATURES” style=”flat” color=”black” i_icon_fontawesome=”fa fa-desktop” add_icon=”true” link=”url:https%3A%2F%2Fwww.castsoftware.com%2Fproducts%2Fhighlight%2Foutputs-analytics||target:%20_blank|”][vc_btn title=”HOW IT WORKS” style=”outline” color=”black” i_icon_fontawesome=”fa fa-cog” add_icon=”true” link=”url:https%3A%2F%2Fwww.castsoftware.com%2Fproducts%2Fhighlight%2Fhow-it-works||target:%20_blank|”][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row]