Truncating a String in Javascript

Question

I know this is absurd but I am stuck at it

I have a filepath using fileupload in asp classic

The filepath is C:\FakePath\3.jpg

I want to retrieve it in a variable so that it would only give me 3.jpg

substring() and substr() doesn't include 3 I don't know why

logopath = C:\FakePath\3.jpg;
logopath = logopath.substring(10);

Please post they way you use the substring() or substr() — Gabriele Petrioli
– Gabriele Petrioli, Commented Dec 26, 2012 at 11:57
If you want it only with JavaScript please don't use other tags. — user447356
– user447356, Commented Dec 27, 2012 at 9:32

TJ- · Accepted Answer · 2012-12-26 11:59:23Z

1

In case you wish to use substring:

var str="C:\\FakePath\\3.jpg";
var imgName = str.substring(12);

answered Dec 26, 2012 at 11:59

TJ-

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4 Comments

pimvdb Over a year ago

Note that the string would need \\. Also, 12 is needed to strip the last \ as well.

TJ- Over a year ago

Thanks @pimvdb I realized it after a while.

Fahad Abid Janjua Over a year ago

but there is no \\ only single \

TJ- Over a year ago

Backslash has a special meaning. Although it is w3Schools, but still : w3schools.com/js/js_obj_string.asp

Royi Namir · Accepted Answer · 2012-12-26 12:07:30Z

1

try this

'C:\\FakePath\\3.jpg'.split('\\').pop(); // "3.jpg"

or (regex)

'C:\\FakePath\\3.jpg'.replace(/^.*\\/, '');   // "3.jpg"

enter image description here

edited Dec 26, 2012 at 12:07

answered Dec 26, 2012 at 11:56

Royi Namir

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4 Comments

Fahad Abid Janjua Over a year ago

there is only single slash

Royi Namir Over a year ago

there is only a single slash in your display string. how would you know if \t is backslash t or tab ? in js you should use special chars.

Fahad Abid Janjua Over a year ago

it will always be a backslash not tab ever

TJ- Over a year ago

Perhaps, play with js and you'll know what @RoyiNamir is talking about. (jsfiddle.net/g3cUK)

MikeM · Accepted Answer · 2012-12-26 13:40:16Z

1

logopath = encodeURIComponent( logopath ).replace( /.+FakePath%0/, '' )

'\3' is being interpreted as an octal escape sequence which points to a non-printable ASCII character.

edited Dec 26, 2012 at 13:40

answered Dec 26, 2012 at 12:56

MikeM

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Comments

user447356 · Accepted Answer · 2012-12-27 09:37:53Z

1

Use such code:

function FileChanged(input) {
    var fullPath = input.value;
    var index = fullPath.lastIndexOf("\\");
    var fileName = (index < 0) ? fullPath : fullPath.substr(index + 1);
    alert(fileName);
}

The two middle lines are what you need: they will take the value after the last slash. This way it doesn't matter what is the path, it will always return only the file name.

Live test case.

answered Dec 27, 2012 at 9:37

user447356

Comments

naota · Accepted Answer · 2012-12-31 12:38:06Z

1

If you'd like to solve it in classic ASP, plesae try this.

<%
dim aryPath
aryPath = Split("C:\FakePath\3.jpg","\")
Response.Write aryPath(2)
%>

Hope it could be helpful.

edited Dec 31, 2012 at 12:38

answered Dec 26, 2012 at 13:13

naota

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1 Comment

webaware Over a year ago

OP asks for JavaScript; note that you can write server-side Classic ASP in either JavaScript or VBScript.

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