what is equivalent C# method for the 'charAt' method in javascript?

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C#3.0

C#

what is equivalent C# method for the javascript method 'charAt'?

Posted 16-Nov-11 0:46am

maajanes

Updated 16-Nov-11 0:50am

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Sergey Alexandrovich Kryukov 16-Nov-11 7:22am

What part of Internet banned you? Google? MSDN? Too bad...
--SA

maajanes 16-Nov-11 7:44am

I have to count the number of occurances of a particular character. What can i do?

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Reiss · Answer 1 · 2011-11-16T00:50:00

Solution 1

I think you mean

C#

string alphabet = "abcdefg...xyz" ;
char b = alphabet[1] ;

Posted 16-Nov-11 0:50am

Reiss

Comments

Sergey Alexandrovich Kryukov 16-Nov-11 7:21am

OK, this is the only correct answer so far, my 5.
--SA

Sergey Alexandrovich Kryukov 16-Nov-11 7:26am

I only added a post with trivial explanation, hope not quite useless, please see. :-)
--SA

Sergey Alexandrovich Kryukov · Answer 2 · 2011-11-16T01:25:00

Solution 3

Always read MSDN before (and typically, instead of) asking such questions: http://msdn.microsoft.com/en-us/library/system.string.aspx[^].

Asking such question at CodeProject is very ineffective compared to reading MSDN help pages, which you should do in all cases anyway.

—SA

Posted 16-Nov-11 1:25am

Sergey Alexandrovich Kryukov

Reiss · Answer 3 · 2011-11-16T02:47:00

In answer to your second question, namely

maajanes wrote:

I have to count the number of occurances of a particular character. What can i do?

The fastest pattern I have come across⁰ is

C#

string source = "this is my test string";
char requiredCharacter = 's';
int count = 0;
foreach (char c in source)
{
   if (c == requiredCharacter)
   {
       count++;
   }
}

⁰
Can't remember were the original came from as it was a while ago, but it is what I use now

rajeevcapgeminiindia · Answer 4 · 2011-11-16T01:06:00

Solution 2

You can do this using Substring() function of the String.

Suppose-
string sname="abcdef...yz";
int nCharAt=0;
char scharAt=Convert.ToChar(sname.Substring(nCharAt,1));

Then the answer will be as-
sCharAt=a;

Posted 16-Nov-11 1:06am

rajeevcapgeminiindia

Comments

Sergey Alexandrovich Kryukov 16-Nov-11 7:21am

It is by far not equivalent, by several reasons. Correct answer is done by Reiss: this is accessing a character by index using "[int]". One important thing to remember: strings are immutable. Substring operator creates brand new string in the heap (in C#, VB.NET) and initialize it by copying fragment of data. Accessing a character is much faster then that and does not have any memory overhead.
--SA

what is equivalent C# method for the 'charAt' method in javascript?

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