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no-self-assign

NOTE: this rule is part of the recommended rule set.
Enable full set in deno.json:
{
  "lint": {
    "tags": ["recommended"]
  }
}
Enable full set using the Deno CLI:
deno lint --tags=recommended

Disallows self assignments.

Self assignments like a = a; have no effect at all. If there are self assignments in the code, most likely it means that the author is still in the process of refactoring and there's remaining work they have to do.

Invalid:

a = a;
[a] = [a];
[a, b] = [a, b];
[a, b] = [a, c];
[a, ...b] = [a, ...b];
a.b = a.b;

Valid:

let a = a;
a += a;
a = [a];
[a, b] = [b, a];
a.b = a.c;

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