JuanCanham/HackMyResume
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Improve keyword regex.

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Better support for simple keywords like "C" or "R".
This commit is contained in:
hacksalot 2016-01-19 19:10:20 -05:00
parent cef9a92cb6
commit 47f6aff561
1 changed files with 29 additions and 2 deletions
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29
src/inspectors/keyword-inspector.js
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@ -17,6 +17,8 @@ Keyword analysis for HackMyResume.
/**
Analyze the resume's use of keywords.
TODO: BUG: Keyword search regex is inaccurate, especially for one or two
letter keywords like "C" or "CLI".
@class keywordInspector
*/
var keywordInspector = module.exports = {
@ -37,19 +39,44 @@ Keyword analysis for HackMyResume.
*/
run: function( rez ) {
// "Quote" or safely escape a keyword so it can be used as a regex. For
// example, if the keyword is "C++", yield "C\+\+".
// http://stackoverflow.com/a/2593661/4942583
function regex_quote(str) {
return (str + '').replace(/[.?*+^$[\]\\(){}|-]/ig, "\\$&");
}
// Create a searchable plain-text digest of the resume
// TODO: BUG: Don't search within keywords for other keywords. Job A
// declares the "foo" keyword. Job B declares the "foo & bar" keyword. Job
// B's mention of "foobar" should not count as a mention of "foo".
// To achieve this, remove keywords from the search digest and treat them
// separately.
var searchable = '';
rez.transformStrings( ['imp', 'computed', 'safe'], function trxString( key, val ) {
searchable += ' ' + val;
});
// Assemble a regex skeleton we can use to test for keywords with a bit
// more
var prefix = '(?:' + ['^', '\\s+', '[\\.,]+'].join('|') + ')';
var suffix = '(?:' + ['$', '\\s+', '[\\.,]+'].join('|') + ')';
return rez.keywords().map(function(kw) {
// 1. Using word boundary or other regex class is inaccurate
//
// var regex = new RegExp( '\\b' + regex_quote( kw )/* + '\\b'*/, 'ig');
var regex = new RegExp( regex_quote( kw ), 'ig');
//
// 2. Searching for the raw keyword is inaccurate ("C" will match any
// word containing a 'c'!).
//
// var regex = new RegExp( regex_quote( kw ), 'ig');
//
// 3. Instead, use a custom regex with special delimeters.
var regex_str = prefix + regex_quote( kw ) + suffix;
var regex = new RegExp( regex_str, 'ig');
var myArray, count = 0;
while ((myArray = regex.exec( searchable )) !== null) {
count++;