Click here to Skip to main content
Click here to Skip to main content
Search within:



 
Comments & Discussions (6)

Trick when using Array.Contains()

By , 13 Jun 2011
 

The Array class already contains this capability with no casting required. The IndexOf method is a static one that returns the index of the value and a -1 if it doesn't exist.

Here is an example:

exists = Array.IndexOf(arr, "item") >= 0

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

 Ctznkane
United States United States
Member
No Biography provided

Article Top
 
Sign Up to vote   Poor Excellent
Add a reason or comment to your vote: x
Votes of 3 or less require a comment

Comments and Discussions

 
You must Sign In to use this message board.
Search this forum  
    Spacing  Noise  Layout  Per page   
First Prev Next
GeneralSimpler and nice one. If we do not want exact matching and i...memberMohammad A Rahman27 Jun '11 - 18:48 
Simpler and nice one. If we do not want exact matching and ignore case, then probably could use something like
string[] newArray = new string[]{ "A", "B", "C" };
bool result = newArray.Contains("a", StringComparer.OrdinalIgnoreCase); or if we consider the case then,
bool result = newArray.Contains("A");
Sign In·View Thread·Permalink
GeneralReason for my vote of 1 Could be problem when finding word i...groupsachin10d20 Jun '11 - 21:56 
Reason for my vote of 1
Could be problem when finding word in string
Sign In·View Thread·Permalink
GeneralRe: You are incorrect. Try this: string[] arr = new[] {"item4", ...memberJV999920 Jun '11 - 22:23 
You are incorrect. Try this:
string[] arr = new[] {"item4", "test", "item 3", "item", "beer"};
 
int index = Array.IndexOf(arr, "item");
bool exists = Array.IndexOf(arr, "item") >= 0;
 
The returned index will always be 3 and if you remove "item", the index will be -1.
 
Voted 5 for this solution. Very elegant, I wouldn't have thought of that method Smile | :)
Sign In·View Thread·Permalink
GeneralReason for my vote of 5 This alternative is even nicer. Than...memberw.a.g.i20 Jun '11 - 20:02 
Reason for my vote of 5
This alternative is even nicer. Thanks!
Sign In·View Thread·Permalink
GeneralReason for my vote of 5 Simpler and just as clear.memberBen Robbins20 Jun '11 - 14:52 
Reason for my vote of 5
Simpler and just as clear.
Sign In·View Thread·Permalink
GeneralArray.IndexOf(arr, "item") >= 0 This will return the exact m...memberKiran Sonawane13 Jun '11 - 4:00 
Array.IndexOf(arr, "item") >= 0 This will return the exact match
Sign In·View Thread·Permalink
Last Visit: 31 Dec '99 - 18:00     Last Update: 19 May '13 - 14:37Refresh1

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

About Article
The Array class already contains this capability with no casting required. The IndexOf method is a static one that returns the index of the value and a -1 if it doesn't exist.Here is an example:exists = Array.IndexOf(arr, "item") >= 0
Type Tip/Trick
Licence CPOL
First Posted 13 Jun 2011
Views 2,089
Bookmarked 5 times
Top News

Math Primers for Programmers

Get the Insider News free each morning.
Related Videos
Styling Backgrounds
jQuery - 0205 When Not To Use
Trick when using Array.Contains()
AJAX-enabled Name Selector User Control
Visual Studio Tips & Tricks for Developers:- This includes some shortcuts features in Visual Studio 2008 which will increase your productivity
Formatting code in Tips and Tricks
Customize Validation Summary
Open a command prompt anywhere.
Vista Aero ToolStrip on Non-Client Area
SharePoint Customization Tricks – Part 2
Fill MSFlexGrid with Numbers and Create Mathematical Trick
SonicUI - A Convenient GUI Engine You've Never Seen
CheckComboBox Control
Iconits
Controlling the XML output when using the FOR XML AUTO statement in SQL Server
LINQ to SQL Tips and Tricks
Avoid invalid namespace error while desrializing class
OnIdle() implementation for CDialog based app´s
Looking at pointer declarations
Quick Answers Bug List
Some handy dialog box tricks, tips and workarounds
10+ powerful debugging tricks with Visual Studio
Permalink | Advertise | Privacy | Mobile
Web01 | 2.6.130516.1 | Last Updated 13 Jun 2011
Article Copyright 2011 by Ctznkane
Everything else Copyright © CodeProject, 1999-2013
Terms of Use
Layout: fixed | fluid