rspec/rules/S888/exceptions.adoc

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=== Exceptions
Equality operators are ignored if the loop counter is not modified within the body of the loop and either:
* starts below the ending value and is incremented by 1 on each iteration.
* starts above the ending value and is decremented by 1 on each iteration.
Equality operators are also ignored when the test is against ``++null++``.
----
for (int i = 0; arr[i] != null; i++) {
// ...
}
for (int i = 0; (item = arr[i]) != null; i++) {
// ...
}
----