d91e10b3bd
PR-URL: https://github.com/nodejs/io.js/pull/2072 Reviewed-By: Yosuke Furukawa <yosuke.furukawa@gmail.com> Reviewed-by: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Alex Kocharin <alex@kocharin.ru>
43 lines
1.3 KiB
JavaScript
43 lines
1.3 KiB
JavaScript
/**
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* @fileoverview Rule to flag use of duplicate keys in an object.
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* @author Ian Christian Myers
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* @copyright 2013 Ian Christian Myers. All rights reserved.
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* @copyright 2013 Nicholas C. Zakas. All rights reserved.
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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 = function(context) {
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return {
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"ObjectExpression": function(node) {
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// Object that will be a map of properties--safe because we will
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// prefix all of the keys.
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var nodeProps = Object.create(null);
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node.properties.forEach(function(property) {
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var keyName = property.key.name || property.key.value,
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key = property.kind + "-" + keyName,
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checkProperty = (!property.computed || property.key.type === "Literal");
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if (checkProperty) {
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if (nodeProps[key]) {
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context.report(node, "Duplicate key '{{key}}'.", { key: keyName });
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} else {
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nodeProps[key] = true;
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}
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}
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});
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}
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};
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};
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module.exports.schema = [];
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