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50 lines
1.2 KiB
50 lines
1.2 KiB
/** |
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* @fileoverview Disallow sparse arrays |
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* @author Nicholas C. Zakas |
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*/ |
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"use strict"; |
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//------------------------------------------------------------------------------ |
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// Rule Definition |
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//------------------------------------------------------------------------------ |
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module.exports = { |
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meta: { |
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type: "problem", |
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docs: { |
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description: "disallow sparse arrays", |
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category: "Possible Errors", |
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recommended: true, |
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url: "https://eslint.org/docs/rules/no-sparse-arrays" |
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}, |
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schema: [], |
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messages: { |
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unexpectedSparseArray: "Unexpected comma in middle of array." |
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} |
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}, |
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create(context) { |
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//-------------------------------------------------------------------------- |
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// Public |
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//-------------------------------------------------------------------------- |
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return { |
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ArrayExpression(node) { |
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const emptySpot = node.elements.indexOf(null) > -1; |
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if (emptySpot) { |
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context.report({ node, messageId: "unexpectedSparseArray" }); |
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} |
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} |
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}; |
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} |
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};
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