Re: case sensitivity in strings...

From: Grant Wagner (gwagner_at_agricoreunited.com)
Date: 11/29/04

  • Next message: Krzysiek K.: "Library program" 
    Date: Mon, 29 Nov 2004 20:18:54 GMT

    Frances Del Rio wrote:

    > Mike B wrote:
    > > Frances Del Rio <fdr58@yahoo.com> wrote:
    > >
    > >>this seems like somthing so simple, but I can't figure it out... I
    > >>have a little app that consists basically of a string being displayed
    > >>and app tests whether or not user typed in a substring of that
    > >>string... (complete code at www.francesdelrio.com/hamlet.html)
    > >>
    > >>but: I would like this to be non-case-sensitive.. the way it is now
    > >>if user types 'hamlet' instead of 'Hamlet' it returns that that
    > >>substring is not found in the string... how do I say:
    > >>if(Str.indexOf(useript) REGARDLESS OF CASE...... like you can do
    > >>with CompareTo() method... I don't see the possibility of doing this
    > >>w/indexOf in API.. thanks for any help.. Frances
    > >
    > >
    > > Translate both strings to either upper- or lower-case before you search in
    > > the string.
    >
    > of course.. thank you... I turned them both to lowercase, but if user
    > types in "Hamlet" I would like app to return that same Upper-lower
    > scheme, well, this might be a small detail... I'm too picky... ;)
    > thank you for your help... (now I have to do same for JavaScript for
    > the form validation.. I tried same approach in JS but so far it's not
    > working..) thank you again... Frances

    Only convert them to lowercase for the comparison, retain the original strings
    to get the original value out:

    String search = "Hamlet";
    String source = "A small town is a hamlet";

    if (source.toLowerCase().indexOf(search.toLowerCase()) != -1) {
        System.out.println("Found '" + search + "' in '" + source + "'.");
    } else {
        System.out.println("Did not find '" + search + "' in '" + source + "'.");
    }

    or if you need the lowercase versions for other tests:

    String search = "Hamlet";
    String source = "A small town is a hamlet";

    String searchLc = search.toLowerCase();
    String sourceLc = source.toLowerCase();

    if (sourceLc.indexOf(searchLc) != -1) { ... 

    --
Grant Wagner <gwagner@agricoreunited.com>
comp.lang.javascript FAQ - http://jibbering.com/faq
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