== Why is this an issue?

Doing an operation on a string without using the result of the operation is useless and is certainly due to a misunderstanding. 


=== Noncompliant code example

[source,javascript]
----
var str = "..."
str.toUpperCase(); // Noncompliant
----


=== Compliant solution

[source,javascript]
----
var str = "..."
str = str.toUpperCase();
----

ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

=== Message

${objectName} is an immutable object; you must either store or return the result of the operation.


'''
== Comments And Links
(visible only on this page)

=== on 7 Aug 2013, 16:52:44 Freddy Mallet wrote:
Is implemented by \http://jira.codehaus.org/browse/SONARJAVA-242

=== on 27 Feb 2015, 09:27:52 Freddy Mallet wrote:
FYI [~ann.campbell.2], KlockWorks has associated this rule to "CWE-391: Unchecked Error Condition". I'm not convinced by such association but just wanted to notify you: \http://docs.klocwork.com/Insight-10.0/Checkers:RI.IGNOREDCALL

=== on 27 Feb 2015, 16:34:02 Ann Campbell wrote:
\[~freddy.mallet] I'm also (extremely!) unconvinced, but thanks for the notification.

endif::env-github,rspecator-view[]