Regex does not ignore case of letters

Question

I have this Regex below that I use together with Textcomplete, check if someone writes # or @ together with a parameter

Regex:

/\B#(\w+)$/

I load some names from my database, and you can search them with either # or @. Lets say that in the database it contains Stackoverflow.

If I write #Stackoverflow it works since I wrote a big S letter. but if I write #stackoverflow it dont work because of the small s letter.

My question is how can I change the regex so it ignore small or big letters?

Updated with script

$('textarea').textcomplete([
               { // html
                   mentions: Companies,
                   match: /\B#(\w+)\i$/,
                   search: function (term, callback) {
                       callback($.map(this.mentions, function (mention) {
                           return mention.indexOf(term) === 0 ? mention : null;
                       }));
                   },
                   template: function (value) {
                       return '<img src="/emoji/' + value + '.png"></img>' + value;
                   },
                   index: 1,
                   replace: function (mention) {
                       return '#' + mention + ' ';
                   }
               }
            ],
            { appendTo: 'body' }).overlay([
                   {
                       match: /\B#\w+/g,
                       css: {
                           'background-color': '#d8dfea',
                       }
                   }
            ])

To show you that It dont work, I created it at codePen.

The `/\B#(\w+)$/` regex matches all lower- and uppercase Latin letters `[a-zA-Z]`. Without a working fiddle it is difficult to judge what is necessary. I guess you need to turn all your matches into lower case for it to work. — Wiktor Stribiżew, Oct 22 '15 at 07:24
Try `return mention.toLowerCase().indexOf(term.toLowerCase()) === 0 ? mention : null;`. — Wiktor Stribiżew, Oct 22 '15 at 07:31
Unfortunately, the codepen does not work for me :(. Did you try my above suggestion. — Wiktor Stribiżew, Oct 22 '15 at 08:04
You codepen started working for me :) and [here is an updated codepen](http://codepen.io/anon/pen/KdQzqZ). It works in fact. I only modified the callback at the end as `return mention.toLowerCase().indexOf(term.toLowerCase()) === 0 ? mention : null;`. — Wiktor Stribiżew, Oct 22 '15 at 11:19
Possible duplicate of [RegEx Ignore Case](http://stackoverflow.com/questions/24395542/regex-ignore-case) — , Oct 22 '15 at 11:46
Yep you are correct it works, I'm sorry i made a misstype i didnt notice. Sorry — Carsten Løvbo Andersen, Oct 22 '15 at 12:35

Rahul Tripathi · Answer 1 · 2015-10-22T07:19:25.340

2

You can use the /i option to ignore the case. So your regex will be

/\B#(\w+)$/i

EDIT:

Just checked your regex and it works fine without the /i

DEMO

edited Oct 22 '15 at 07:19

answered Oct 22 '15 at 07:09

Rahul Tripathi

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why would it be a joke? – Carsten Løvbo Andersen Oct 22 '15 at 07:14
@stribizhev:- Yes you are correct. That is not required. Updated my answer. Thanks for pointing it. – Rahul Tripathi Oct 22 '15 at 07:17
I have removed my previous comments. Now, this answer offers a solution that is identical to what OP is already using. – Wiktor Stribiżew Oct 22 '15 at 07:35
I updated it again with a codepen link so you can see what i mean – Carsten Løvbo Andersen Oct 22 '15 at 07:45

score 1 · Accepted Answer · answered Oct 22 '15 at 11:45

1

I modified the callback at the end as

return mention.toLowerCase().indexOf(term.toLowerCase()) === 0 ? mention : null;

Here is an updated codepen.

Now, it works:

answered Oct 22 '15 at 11:45

Wiktor Stribiżew

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Regex does not ignore case of letters

2 Answers2