Returning IEnumerable from an indexer, bad practice?

Posted by fearofawhackplanet on Stack Overflow See other posts from Stack Overflow or by fearofawhackplanet
Published on 2010-03-25T12:50:18Z Indexed on 2010/03/25 12:53 UTC
Read the original article Hit count: 547

Filed under:

c#

|

indexer

|

collections

If I had a CarsDataStore representing a table something like:

Cars
--------------
Ford | Fiesta
Ford | Escort
Ford | Orion
Fiat | Uno
Fiat | Panda

Then I could do

IEnumerable<Cars> fords = CarsDataStore["Ford"];

Is this a bad idea? It's iconsistent with the other datastore objects in my api (which all have a single column PK indexer), and I'm guessing most people don't expect an indexer to return a collection in this situation.

© Stack Overflow or respective owner

Related posts about c#

.NET WebRequest.PreAuthenticate not quite what it sounds like

as seen on West-Wind - Search for 'West-Wind'
I’ve run into the problem a few times now: How to pre-authenticate .NET WebRequest calls doing an HTTP call to the server – essentially send authentication credentials on the very first request instead of waiting for a server challenge first? At first glance this sound like it should be easy:… >>> More
HttpWebRequest and Ignoring SSL Certificate Errors

as seen on West-Wind - Search for 'West-Wind'
Man I can't believe this. I'm still mucking around with OFX servers and it drives me absolutely crazy how some these servers are just so unbelievably misconfigured. I've recently hit three different 3 major brokerages which fail HTTP validation with bad or corrupt certificates at least according to… >>> More
The dynamic Type in C# Simplifies COM Member Access from Visual FoxPro

as seen on West-Wind - Search for 'West-Wind'
I’ve written quite a bit about Visual FoxPro interoperating with .NET in the past both for ASP.NET interacting with Visual FoxPro COM objects as well as Visual FoxPro calling into .NET code via COM Interop. COM Interop with Visual FoxPro has a number of problems but one of them at least got a lot… >>> More
Dynamic Type to do away with Reflection

as seen on West-Wind - Search for 'West-Wind'
The dynamic type in C# 4.0 is a welcome addition to the language. One thing I’ve been doing a lot with it is to remove explicit Reflection code that’s often necessary when you ‘dynamically’ need to walk and object hierarchy. In the past I’ve had a number of ReflectionUtils that used string based expressions… >>> More
Finding a Relative Path in .NET

as seen on West-Wind - Search for 'West-Wind'
Here’s a nice and simple path utility that I’ve needed in a number of applications: I need to find a relative path based on a base path. So if I’m working in a folder called c:\temp\templates\ and I want to find a relative path for c:\temp\templates\subdir\test.txt I want to receive back subdir\test… >>> More

Related posts about indexer

using indexer to retrieve Linq to SQL object from datastore

as seen on Stack Overflow - Search for 'Stack Overflow'
class UserDatastore : IUserDatastore { ... public IUser this[Guid userId] { get { User user = (from u in _dataContext.Users where u.Id == userId select u).FirstOrDefault(); return user; … >>> More
Returning IEnumerable from an indexer, bad practice?

as seen on Stack Overflow - Search for 'Stack Overflow'
If I had a CarsDataStore representing a table something like: Cars -------------- Ford | Fiesta Ford | Escort Ford | Orion Fiat | Uno Fiat | Panda Then I could do IEnumerable<Cars> fords = CarsDataStore["Ford"]; Is this a bad idea? It's iconsistent with the other datastore objects in my… >>> More
no Jquery only Javascrip fadein function with cleartype fot text

as seen on Stack Overflow - Search for 'Stack Overflow'
Sorry guys.. I am not familiar with JavaScrip anymore but I need to add clear type of some thing which can make text anti-aliased in IE7 browser. My script as follow // JavaScript Document var CurrentDivIndex=0; var TimeOutValue; var btn; var TimeToFade = 1000.0; function ShowDivSlideShow() { try… >>> More
Windows Search Indexer keeps taking the focus

as seen on Super User - Search for 'Super User'
I am trying to watch a video with MPC and then Windows Search Indexer keeps taking the focus.. how do I prevent it from doing that? running Windows 7 with x64 >>> More
Issue with getting 2 chars from string using indexer

as seen on Stack Overflow - Search for 'Stack Overflow'
I am facing an issue in reading char values. See my program below. I want to evaluate an infix expression. As you can see I want to read '10' , '*', '20' and then use them...but if I use string indexer s[0] will be '1' and not '10' and hence I am not able to get the expected result. Can you guys suggest… >>> More