56 lines
1.2 KiB
Plaintext
56 lines
1.2 KiB
Plaintext
== Why is this an issue?
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include::../description.adoc[]
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Moreover, using chained assignment in declarations is also dangerous because one may accidentally create global variables, e.g. in ``++let x = y = 1;++``, if ``++y++`` is not declared, it will be hoisted as global.
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=== Noncompliant code example
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[source,javascript]
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----
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if (val = value() && check()) { // Noncompliant
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// ...
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}
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----
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=== Compliant solution
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[source,javascript]
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----
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val = value();
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if (val && check()) {
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// ...
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}
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----
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=== Exceptions
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The rule does not raise issues for the following patterns:
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* chained assignments: ``++a = b = c = 0;++``
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* relational assignments: ``++(a = 0) != b++``
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* sequential assignments: ``++a = 0, b = 1, c = 2++``
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* assignments in lambda body: ``++() => a = 0++``
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* conditional assignment idiom: ``++a || (a = 0)++``
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* assignments in (do-)while conditions: ``++while (a = 0);++``
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include::../see.adoc[]
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ifdef::env-github,rspecator-view[]
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'''
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== Implementation Specification
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(visible only on this page)
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include::../message.adoc[]
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include::../highlighting.adoc[]
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'''
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== Comments And Links
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(visible only on this page)
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include::../comments-and-links.adoc[]
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endif::env-github,rspecator-view[]
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