How to check if filename contains substring in JavaScript?

Question

I have a folder on the hard drive with files named

myfileone_163637
myfiletwo_14153535
myfilethree_3739284

The numbers at the end of the filenames are random.

How can I check with JavaScript if the file containing "myfilethree" in its name is present?

Thank you in advance.

https://www.google.co.uk/search?q=javascript+indexof – Alex K. Oct 25 '12 at 12:22 — Alex K., Oct 25 '12 at 12:22

score 3 · Answer 1 · answered Oct 25 '12 at 12:23

3

if you have the file names you can use something like:

if(theFileName.indexOf('myfilethree') > -1)
{
    do your magic here because "myfilethree" is present in the name!
}

However, I am not aware of any way to read a directory index in javascript.

answered Oct 25 '12 at 12:23

Kris

40,604
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He may be using node.js, which has a module for filesystem interaction. – Sirko Oct 25 '12 at 12:24
@Sirko node.js supports `indexOf` by all means :) – VisioN Oct 25 '12 at 12:25
@VisioN The comment was just meant for the last sentence, which doubted a directory index function for JavaScript. Gave +1, anyway. – Sirko Oct 25 '12 at 12:29
I know node has lots of IO stuff but node does not equal javascript, nor is it mentioned in the question. – Kris Oct 25 '12 at 13:08

score 1 · Answer 2 · edited May 23 '17 at 11:53

There are two parts to this: getting a list of files in a directory, and then searching them for a substring. I'll start with the sceond part, because that's easiest. Simply use indexOf to check for the desired string. If the result of indexOf is not equal to -1, you have a match:

if (filename.indexOf("myfilex") != -1) {
    // whatever you want to do
}

As to actually retrieving a list of files, you will need to use Windows Script Host and JScript. See this question for details on that.

score 0 · Answer 3 · answered Oct 25 '12 at 12:33

0

var str = 'myfilethree';
if (str.toLowerCase().indexOf("myfilethree") >= 0)
{
    alert('File Found');
}

Try This:

answered Oct 25 '12 at 12:33

brightboy2004

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3

How to check if filename contains substring in JavaScript?

3 Answers3