== Why is this an issue?

include::../description.adoc[]

include::../noncompliant.adoc[]

include::../compliant.adoc[]

=== Exceptions

 * This rule ignores initializations to -1, 0, 1, ``++undefined++``, [], {}, ``++true++``, ``++false++`` and ``++""++``. 
 * Variables that start with an underscore (e.g. \'``++_unused++``') are ignored.
 * Assignment of ``++null++`` is ignored because it is sometimes used to help garbage collection
 * Increment and decrement expressions are ignored because they are often used idiomatically instead of `x+1`
 * This rule also ignores variables declared with object destructuring using rest syntax (used to exclude some properties from object):

[source,javascript]
----
let {a, b, ...rest} = obj; // 'a' and 'b' are ok
doSomething(rest);

let [x1, x2, x3] = arr;    // but 'x1' is noncompliant, as omitting syntax can be used: "let [, x2, x3] = arr;"
doSomething(x2, x3);
----

include::../see.adoc[]

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

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

include::../message.adoc[]

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

=== on 29 Apr 2015, 07:49:23 Ann Campbell wrote:
assigned for review of expansion

=== on 29 Apr 2015, 08:55:42 Linda Martin wrote:
Reviewed!

include::../comments-and-links.adoc[]

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