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PR-URL: https://github.com/iojs/io.js/pull/1539 Fixes: https://github.com/iojs/io.js/issues/1253 Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com> Reviewed-By: Trevor Norris <trev.norris@gmail.com> Reviewed-By: Roman Reiss <me@silverwind.io> Reviewed-By: Chris Dickinson <christopher.s.dickinson@gmail.com> Reviewed-By: Johan Bergström <bugs@bergstroem.nu> Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
42 lines
1.3 KiB
JavaScript
42 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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