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no-assign-mutated-array Allow mutation of an array after flat and flatMap #68

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no-assign-mutated-array Allow mutation of an array after flat and flatMap #68

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3 changes: 2 additions & 1 deletion source/rules/no-assign-mutated-array.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,8 @@ import {
import { ruleCreator } from "../utils";

const mutatorRegExp = /^(fill|reverse|sort)$/;
const creatorRegExp = /^(concat|entries|filter|keys|map|slice|splice|values)$/;
const creatorRegExp =
/^(concat|entries|filter|keys|map|slice|splice|values|flat|flatMap)$/;

const rule = ruleCreator({
defaultOptions: [],
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18 changes: 18 additions & 0 deletions tests/rules/no-assign-mutated-array.ts
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Expand Up @@ -144,6 +144,24 @@ ruleTester({ types: true }).run("no-assign-mutated-array", rule, {
);
`,
},
{
code: stripIndent`
// flat & mutated variable assignment
const a = [[0, 1], [2, 3]];
const b = a.flat().fill(0);
const c = a.flat().reverse();
const d = a.flat().sort();
`,
},
{
code: stripIndent`
// flatMap & mutated variable assignment
const a = [[0, 1], [2, 3]];
const b = a.flatMap(e => e).fill(0);
const c = a.flatMap(e => e).reverse();
const d = a.flatMap(e => e).sort();
`,
},
{
code: stripIndent`
// https://github.com/cartant/eslint-plugin-etc/issues/27
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