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Trick when using Array.Contains()

Ctznkane

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13 Jun 2011CPOL 13.5K   5   6

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

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:

C#

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)

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Ctznkane

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Comments and Discussions

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Simpler and nice one. If we do not want exact matching and i... Mohammad A Rahman27-Jun-11 18:48 Mohammad A Rahman 27-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"); Reason for my vote of 1 Could be problem when finding word i... sachin10d20-Jun-11 21:56 sachin10d 20-Jun-11 21:56  Reason for my vote of 1 Could be problem when finding word in string Re: You are incorrect. Try this: string[] arr = new[] {"item4", ... JV999920-Jun-11 22:23 JV9999 20-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 Reason for my vote of 5 This alternative is even nicer. Than... w.a.g.i20-Jun-11 20:02 w.a.g.i 20-Jun-11 20:02  Reason for my vote of 5 This alternative is even nicer. Thanks! Reason for my vote of 5 Simpler and just as clear. Ben Robbins20-Jun-11 14:52 Ben Robbins 20-Jun-11 14:52  Reason for my vote of 5 Simpler and just as clear. Array.IndexOf(arr, "item") >= 0 This will return the exact m... Kiran Sonawane13-Jun-11 4:00 Kiran Sonawane 13-Jun-11 4:00  Array.IndexOf(arr, "item") >= 0 This will return the exact match

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