How to make search case insensitive using nodejs?

Question

I have a search function so i have input from client Str if that matchs with content in file send that in response. Lets assume i have text in file Lorem now if i search as lorem from client, it sends empty array because of case sensitive. How can i make search case insensitive ?

searchService.js

var searchStr;
function readFile(str, logFiles, callback) {
        searchStr = str;
        // loop through each file
        async.eachSeries(logFiles, function (logfile, done) {
            // read file
            fs.readFile('logs/dit/' + logfile.filename, 'utf8', function (err, data) {
                if (err) {
                    return done(err);
                }
                var lines = data.split('\n'); // get the lines
                lines.forEach(function(line) { // for each line in lines
                    if (line.indexOf(searchStr) != -1) { // if the line contain the searchSt
                        results.push({
                        filename:logfile.filename,
                        value:line
                        });
                    }
                });
                // when you are done reading the file
                done();
            });

Possible duplicate of [Convert JavaScript String to be all lower case?](http://stackoverflow.com/questions/154862/convert-javascript-string-to-be-all-lower-case) — Jyotman Singh, Mar 03 '17 at 18:33

score 5 · Accepted Answer · answered Mar 03 '17 at 18:32

5

You can make use of toLowerCase()

if (line.toLowerCase().indexOf(searchStr.toLowerCase()) != -1) { ...

answered Mar 03 '17 at 18:32

Andrew Brooke

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How about if we have uppercase in file content and client send lowerCase string ? – hussain Mar 03 '17 at 18:52
You'll notice I call `toLowerCase()` on the `line` string as well – Andrew Brooke Mar 03 '17 at 18:55
Great! Thank you! – Jonca33 Aug 08 '17 at 14:27

a_at_cyber_dot_training · Answer 2 · 2017-03-03T23:53:52.147

1

You can use regex using .match(/pattern/i). The /i makes the pattern search case insensitive.

if ("LOREMMMMMM".match(/Lorem/i)) console.log("Match");

edited Mar 03 '17 at 23:53

answered Mar 03 '17 at 23:45

a_at_cyber_dot_training

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How to make search case insensitive using nodejs?

2 Answers2