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Improve keyword regex.
Better support for simple keywords like "C" or "R".
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@ -17,6 +17,8 @@ Keyword analysis for HackMyResume.
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/**
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Analyze the resume's use of keywords.
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TODO: BUG: Keyword search regex is inaccurate, especially for one or two
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letter keywords like "C" or "CLI".
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@class keywordInspector
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*/
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var keywordInspector = module.exports = {
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@ -37,19 +39,44 @@ Keyword analysis for HackMyResume.
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*/
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run: function( rez ) {
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// "Quote" or safely escape a keyword so it can be used as a regex. For
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// example, if the keyword is "C++", yield "C\+\+".
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// http://stackoverflow.com/a/2593661/4942583
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function regex_quote(str) {
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return (str + '').replace(/[.?*+^$[\]\\(){}|-]/ig, "\\$&");
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}
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// Create a searchable plain-text digest of the resume
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// TODO: BUG: Don't search within keywords for other keywords. Job A
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// declares the "foo" keyword. Job B declares the "foo & bar" keyword. Job
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// B's mention of "foobar" should not count as a mention of "foo".
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// To achieve this, remove keywords from the search digest and treat them
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// separately.
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var searchable = '';
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rez.transformStrings( ['imp', 'computed', 'safe'], function trxString( key, val ) {
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searchable += ' ' + val;
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});
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// Assemble a regex skeleton we can use to test for keywords with a bit
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// more
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var prefix = '(?:' + ['^', '\\s+', '[\\.,]+'].join('|') + ')';
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var suffix = '(?:' + ['$', '\\s+', '[\\.,]+'].join('|') + ')';
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return rez.keywords().map(function(kw) {
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//var regex = new RegExp( '\\b' + regex_quote( kw )/* + '\\b'*/, 'ig');
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var regex = new RegExp( regex_quote( kw ), 'ig');
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// 1. Using word boundary or other regex class is inaccurate
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//
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// var regex = new RegExp( '\\b' + regex_quote( kw )/* + '\\b'*/, 'ig');
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//
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// 2. Searching for the raw keyword is inaccurate ("C" will match any
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// word containing a 'c'!).
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//
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// var regex = new RegExp( regex_quote( kw ), 'ig');
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//
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// 3. Instead, use a custom regex with special delimeters.
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var regex_str = prefix + regex_quote( kw ) + suffix;
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var regex = new RegExp( regex_str, 'ig');
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var myArray, count = 0;
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while ((myArray = regex.exec( searchable )) !== null) {
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count++;
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