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/** |
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* retrieve current list of pattern categories |
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*/ |
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function getCategories ( ) { |
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var patterns = this.listpatterns(); |
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function isCatInList ( arr, obj, idx ) { |
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for (var i in arr) { |
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if ( arr[i][idx] && obj[idx] && (arr[i][idx] == obj[idx]) ) { |
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return (true); |
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} |
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} |
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return false; |
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} |
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function sortByKey(array, key) { |
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return array.sort(function(a, b) { |
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var x = a[key]; var y = b[key]; |
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return ((x < y) ? -1 : ((x > y) ? 1 : 0)); |
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}); |
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} |
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// categories data |
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var categories = []; |
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for (var pattern in patterns) { |
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var patterncategories = []; |
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if (patterns[pattern].pattern && patterns[pattern].pattern.categories) { |
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var patterncategories = |
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!Array.isArray(patterns[pattern].pattern.categories) ? |
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[patterns[pattern].pattern.categories] : |
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patterns[pattern].pattern.categories; |
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} |
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for (var i in patterncategories) { |
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var cat = { |
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name: String(patterncategories[i]), |
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slug: String(patterncategories[i]) |
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}; |
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if ( !isCatInList( categories, cat, 'slug' ) ) { |
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var catPatterns = this.listpatterns(cat.slug); |
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cat.patterns = catPatterns; |
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cat.patternsCount = (function (b) { |
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var c = 0; for (var a in b) { c++; }; return c; |
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})(catPatterns); |
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categories.push(cat); |
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} |
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} |
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} |
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categories = sortByKey(categories, 'slug'); |
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return (categories); |
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} |
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module.exports = getCategories; |
When iterating over the keys of an object, this includes not only the keys of the object, but also keys contained in the prototype of that object. It is generally a best practice to check for these keys specifically: