francoismora 68e8d50815
Modify rule s4144: Add exception for identical functions. (#1151)
* Modify rule s4144: Add exception for identical functions.

* Update exception justification

Co-authored-by: Tibor Blenessy <tibor.blenessy@sonarsource.com>
2022-08-08 13:27:34 +00:00

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When two functions have the same implementation, either it was a mistake - something else was intended - or the duplication was intentional, but may be confusing to maintainers. In the latter case, the code should be refactored.
== Noncompliant Code Example
[source,javascript]
----
function calculateCode() {
doTheThing();
doOtherThing();
return code;
}
function getName() { // Noncompliant
doTheThing();
doOtherThing();
return code;
}
----
== Compliant Solution
[source,javascript]
----
function calculateCode() {
doTheThing();
doOtherThing();
return code;
}
function getName() {
return calculateCode();
}
----
== Exceptions
* Functions with fewer than 3 lines are ignored.
* This rule does not apply to function expressions and arrow functions because they don't have explicit names and are often used in a way where refactoring is not applicable.
[source,javascript]
----
list.map((item) => ({
name: item.name,
address: item.address,
country: item.country
}));
----
ifdef::env-github,rspecator-view[]
'''
== Implementation Specification
(visible only on this page)
include::../message.adoc[]
include::../highlighting.adoc[]
'''
== Comments And Links
(visible only on this page)
include::../comments-and-links.adoc[]
endif::env-github,rspecator-view[]