http://snippets.dzone.com/posts Fri, 25 Jul 2008 02:57:08 GMT DZone Snippets: inflector code http://snippets.dzone.com/posts/show/3205 I was using Ajax to do some DOM manipulation in a Rails app I was working on. None of what I was doing needed to involve a round trip to server, the only reason I hit the server at all was to take advantage of Rails' (well, ActiveSupport's) pluralize function. Also, this technique required an extra action that I decided to eliminate as I try to move to a more RESTful architecture. <br /> <br />The only part of ActiveSupport's Inflector class I implemented are the ones I needed. I implemented even fewer of Rails' Inflector-based functions. <br /> <br />Stick all this in a file, such as "inflector.js". <br /><code>/* <br /> * This script depends on no outside libraries. <br /> */ <br /> <br />Inflector = { <br /> /* <br /> * The order of all these lists has been reversed from the way <br /> * ActiveSupport had them to keep the correct priority. <br /> */ <br /> Inflections: { <br /> plural: [ <br /> [/(quiz)$/i, "$1zes" ], <br /> [/^(ox)$/i, "$1en" ], <br /> [/([m|l])ouse$/i, "$1ice" ], <br /> [/(matr|vert|ind)ix|ex$/i, "$1ices" ], <br /> [/(x|ch|ss|sh)$/i, "$1es" ], <br /> [/([^aeiouy]|qu)y$/i, "$1ies" ], <br /> [/(hive)$/i, "$1s" ], <br /> [/(?:([^f])fe|([lr])f)$/i, "$1$2ves"], <br /> [/sis$/i, "ses" ], <br /> [/([ti])um$/i, "$1a" ], <br /> [/(buffal|tomat)o$/i, "$1oes" ], <br /> [/(bu)s$/i, "$1ses" ], <br /> [/(alias|status)$/i, "$1es" ], <br /> [/(octop|vir)us$/i, "$1i" ], <br /> [/(ax|test)is$/i, "$1es" ], <br /> [/s$/i, "s" ], <br /> [/$/, "s" ] <br /> ], <br /> singular: [ <br /> [/(quiz)zes$/i, "$1" ], <br /> [/(matr)ices$/i, "$1ix" ], <br /> [/(vert|ind)ices$/i, "$1ex" ], <br /> [/^(ox)en/i, "$1" ], <br /> [/(alias|status)es$/i, "$1" ], <br /> [/(octop|vir)i$/i, "$1us" ], <br /> [/(cris|ax|test)es$/i, "$1is" ], <br /> [/(shoe)s$/i, "$1" ], <br /> [/(o)es$/i, "$1" ], <br /> [/(bus)es$/i, "$1" ], <br /> [/([m|l])ice$/i, "$1ouse" ], <br /> [/(x|ch|ss|sh)es$/i, "$1" ], <br /> [/(m)ovies$/i, "$1ovie" ], <br /> [/(s)eries$/i, "$1eries"], <br /> [/([^aeiouy]|qu)ies$/i, "$1y" ], <br /> [/([lr])ves$/i, "$1f" ], <br /> [/(tive)s$/i, "$1" ], <br /> [/(hive)s$/i, "$1" ], <br /> [/([^f])ves$/i, "$1fe" ], <br /> [/(^analy)ses$/i, "$1sis" ], <br /> [/((a)naly|(b)a|(d)iagno|(p)arenthe|(p)rogno|(s)ynop|(t)he)ses$/i, "$1$2sis"], <br /> [/([ti])a$/i, "$1um" ], <br /> [/(n)ews$/i, "$1ews" ], <br /> [/s$/i, "" ] <br /> ], <br /> irregular: [ <br /> ['move', 'moves' ], <br /> ['sex', 'sexes' ], <br /> ['child', 'children'], <br /> ['man', 'men' ], <br /> ['person', 'people' ] <br /> ], <br /> uncountable: [ <br /> "sheep", <br /> "fish", <br /> "series", <br /> "species", <br /> "money", <br /> "rice", <br /> "information", <br /> "equipment" <br /> ] <br /> }, <br /> ordinalize: function(number) { <br /> if (11 <= parseInt(number) % 100 && parseInt(number) % 100 <= 13) { <br /> return number + "th"; <br /> } else { <br /> switch (parseInt(number) % 10) { <br /> case 1: return number + "st"; <br /> case 2: return number + "nd"; <br /> case 3: return number + "rd"; <br /> default: return number + "th"; <br /> } <br /> } <br /> }, <br /> pluralize: function(word) { <br /> for (var i = 0; i < Inflector.Inflections.uncountable.length; i++) { <br /> var uncountable = Inflector.Inflections.uncountable[i]; <br /> if (word.toLowerCase == uncountable) { <br /> return uncountable; <br /> } <br /> } <br /> for (var i = 0; i < Inflector.Inflections.irregular.length; i++) { <br /> var singular = Inflector.Inflections.irregular[i][0]; <br /> var plural = Inflector.Inflections.irregular[i][1]; <br /> if ((word.toLowerCase == singular) || (word == plural)) { <br /> return plural; <br /> } <br /> } <br /> for (var i = 0; i < Inflector.Inflections.plural.length; i++) { <br /> var regex = Inflector.Inflections.plural[i][0]; <br /> var replace_string = Inflector.Inflections.plural[i][1]; <br /> if (regex.test(word)) { <br /> return word.replace(regex, replace_string); <br /> } <br /> } <br /> } <br />} <br /> <br />function ordinalize(number) { <br /> return Inflector.ordinalize(number); <br />} <br /> <br />/* <br /> * Javascript doesn't have optional parameters or overloading so I had to use <br /> * the ever popular pseudo options hash object technique. <br /> * required properties: <br /> * count Number of objects to pluralize <br /> * singular Singular noun for the objects <br /> * optional property: <br /> * plural Plural (probably irregular) noun for the objects <br /> * examples: <br /> * pluralize({ count: total_count, singular: "Issue" }) <br /> * pluralize({ count: total_count, singular: "Goose", plural: "Geese" }) <br /> */ <br />function pluralize(options) { <br /> return options.count + " " + (1 == parseInt(options.count) ? <br /> options.singular : <br /> options.plural || Inflector.pluralize(options.singular)); <br />}</code> Tue, 26 Dec 2006 07:37:50 GMT http://snippets.dzone.com/posts/show/3205 sporkyy (Todd Sayre)