indexer

I'm trying to parse an HTML document for a web indexing program. To do this I'm using HTML::TokeParser . I'm getting an error on the last line of my first if statement: if ( $token->[1] eq 'a' ) { #href attribute of tag A my $suffix = $token->[2]{href}; that says Can't use string ("<./a>") as a HASH ref while "strict refs" in use at ./indexer.pl line 270, <PAGE_DIR> line 1. Is my problem that (the suffix? or <./a> ?) is a string and needs to be turned into a hash ref? I looked at other posts that had similar errors.. but I'm still not at all sure about this. Thanks for any help. sub parse

In C#, what's the syntax for declaring an indexer as part of an interface? Is it still this[ ] ? Something feels odd about using the this keyword in an interface. public interface IYourList<T> { T this[int index] { get; set; } } It is - it's pretty odd syntax at other times if you ask me! But it works. You have to declare the get; and/or set; parts of it with no definition, just a semi-colon, exactly like ordinary properties in an interface. I know what you mean but, yes, this is correct. Here are the docs . 来源： https://stackoverflow.com/questions/1223490/indexer-as-part-of-the-interface-in-c

Is it possible to use extension methods to extend an indexer? I want to be able to get cell's value from DataGridViewCell of given DataGridViewRow using header text like this: object o = row["HeaderText"]; I have this code public static class Ext { public static object Cells(this DataGridViewRow r, string header) { foreach (DataGridViewCell c in r.Cells) { if (c.OwningColumn.HeaderText == header) { return c.Value; } } return null; } } and I want similar indexer. Thanks. Indexers are actually properties, and extension properties do not exist in C#. So this can't be done the way you want. See

I noticed that arrays have the SetValue method, which seems a little out of place when you could just use the indexers. Is there some special purpose for SetValue? The MSDN article didn't seem to say what SetValue was for, just how to use it. Which method would be more efficient to use as far as speed goes? Sometimes all you have of an array is that it's an Array . The Array class does not have indexers, so the best way to set/get element values on it is via the GetValue and SetValue methods. For example: private void M(Array array) { array[0] = 5; // <-- Compiler error array.SetValue(5, 0); /

I'm working on a project while involves TOM files (.t extension), which get compiled into .c files. Now, I've told my Eclipse to treat them like C sources files, but the CDT indexer doesn't seem to want to touch them. Is it possible to tell it to consider additional filetypes? Note: TOM files look just like C files but with some additional syntax, which would just look like syntax errors on some lines to the indexer. The easiest way to do this is define a new association. To do this on your project, open Project Properties -> C/C++ General -> File Types , then select Use Project Settings and

How do I create a categorical section indexer for a listview with string array? I have seen examples for alphabet indexer, but how is it implemented for categories e.g. Section 1, Section 2, Section 3...? Customize this as adapter as for your need and set to your list view thats all ,taken from here public class ContactsAdapter extends BaseAdapter implements SectionIndexer { Context context; String[] strings; String[] sections ; HashMap<String, Integer> alphaIndexer; public ContactsAdapter(Context context, String[] strings) { this.context = context; this.strings = strings; alphaIndexer = new

Eclipse fails to locate Qt includes. Likewise, it fails to provide auto-complete functionality for Qt classes. I did Project -> Properties -> Paths and Symbols -> Includes -> Add to the include directories of Qt in /usr/include/qt4/ . This caused Eclipse to recognize certain certain classes such as QString ; however, there is no auto-complete. I have scoured the web to no avail. How do I make Eclipse index Qt into my project? Edit: 12/20/12 I have solved my own problem. It appears order of the includes matter. I put 'usr/include/qt4' 'usr/include/qt4/Qt' 'usr/include/qt4/QtCore' 'usr/include