I habe a sentence:
string x = "This is a first string, this is a second string.";
When add every word into an array
string[] words = x.Trim().Split(new char[] { ' ' });
What do I have to do to add only unique words into the array ?
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4 Answers
Use Linq.
Also, since Split takes a params array, you don't need the new char[] part.
string[] words = x.Trim().Split(' ').Distinct().ToArray();
4 Comments
BoltClock
An answer with three upvotes in a full minute and SO decides not to tell me at all. Geez.
Jon Grant
You might also want to use a regex or something similar to strip out any punctuation, so that you don't have one entry for "string," and one entry for "string.".
Adriano Carneiro
haha, you were faster ;) It's like: "Ladies and Gentlemen, start your engines!"
hunter
You'll also want to handle different casing of a word
Use
string[] words = x.Trim().Split(new char[] { ' ' }).Distinct().ToArray();
Comments
You have to do is:
string[] words = x.Trim().Split(new char[] { ' ' }).Distinct().ToArray();
Comments
Before adding the string to array, you could traverse the array to see if word already exists.
For example:
List<string> arrayStr = new List<string>();
Before adding, you could do
if(arrayStr.Contains(abc))
MessageBox.Show("Word already exists");
else
arrayStr.Add(abc);
hope this helps
