strchr in objective C?

Posted by Brian Postow on Stack Overflow See other posts from Stack Overflow or by Brian Postow
Published on 2010-04-01T18:47:05Z Indexed on 2010/04/01 18:53 UTC
Read the original article Hit count: 445

Filed under:

objective-c

|

strings

|

nsstring

I'm trying to write the equivalent of strchr, but with NSStrings... I've currently got this:

Boolean nsstrchr(NSString* s, char c)
{
    NSString *tmps = [NSString stringWithFormat: @"%c", c];
    NSCharacterSet *cSet = [NSCharacterSet characterSetWithCharactersInString: tmps];
    NSRange rg = [s rangeOfCharacterFromSet: cSet];
    return rg.location != NSNotFound;
}

This seems needlessly complex... Is there a way to do this (preferably, one that doesn't involve turning the NSString into a cstring which doubles the run time, or writing it myself using characterAtIndex:... Am I missing some obvious method in the NSString description?

© Stack Overflow or respective owner

Related posts about objective-c

Blocking access to websites with objective-C / root privileges in objective-C

as seen on Stack Overflow - Search for 'Stack Overflow'
I am writing a program in Objective-C (XCode 3.2, on Snow Leopard) that is capable of either selectively blocking certain sites for a duration or only allow certain sites (and thus block all others) for a duration. The reasoning behind this program is rather simple. I tend to get distracted when I… >>> More
Objective-C with some Objective-C++, calling a normal c++ method "referenced from" problem

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I made an Objective-C project for the iPhone. I had only one cpp class, the soundEngine taken from some Apple demo. Now I'm trying to merge OpenFeint which is coded in Objective-C++. As soon as I drop in the code without even referring to it from my code, when I hit Build, my Objective-C code… >>> More
Add an objective @property attribute in objective-c

as seen on Stack Overflow - Search for 'Stack Overflow'
Does anyone know of a way to add additional attribute types to the @property keyword without modifying the compiler? Or can anyone think of another way to genericize getter/setter creation? Basically, I have a lot of cases in a recent project where it's handy for objects to lazily instantiate their… >>> More
ObjectiveC Syntax for Specifying Protocol Name in Method Argument

as seen on Stack Overflow - Search for 'Stack Overflow'
What's the ObjectiveC syntax for specifying a protocol as an argument in a method? Say I have 2 protocols, MyProtocol and MyProtocolCB: @protocol MyProtocolCB <NSObject> - (void) func; @end @protocol MyProtocol <NSObject> - (void) register:(MyProtocolCB*) cb; @end I'm receiving this… >>> More
ObjectiveC builtin template system ?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am developing an iPhone application and I use HTML to display formatted text. I often display the same webpage, but with a different content. I would like to use a template HTML file, and then fill it with my diffent values. I wonder if ObjectiveC has a template system similar to ERB in Ruby. That… >>> More

Related posts about strings

References to other strings in strings.xml ?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi Is it possible to reference other strings inside of strings.xml ? Something of the form: My string Here it is: android:id="@string/string_one" (If it did exist, there would of course be problems of circular, infinite definitions, etc. to beware of). Thanks. >>> More
Passing List of Strings or Array of strings into Unity Injection Constructor (Config-Based)

as seen on Stack Overflow - Search for 'Stack Overflow'
I cannot seem to get unity working when attempting to pass in an array of strings into a constructor parameter list, while using XML configuration. When I try the following: <typeConfig ...> <constructor ...> <param ... parameterType="System.String[]"> <array>… >>> More
Strings in array are no longer strings after jQuery.each()

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm pretty confused with the behaviour of arrays of strings when I loop them through the jQuery.each() method. Apparently, the strings become jQuery objects inside the callback function. However, I cannot use the this.get() method to obtain the original string; doing so triggers a this.get is not… >>> More
Complete if statement with strings and array of strings

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a page that has 3 variables. They look like this: String[] Headers = new String[] { "Max Width", "Max Length", "Max Height" }; String currentHeader = (String)HttpContext.Current.Request.QueryString["ItemHas"] ?? ""; String checkString = (String)HttpContext.Current.Request.QueryString["ItemIn"]… >>> More
[C++] Index strings by other strings

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I need to index specific strings with other strings and I can't really find a good way to do so. I tried to use tr1::unordered_map, but I'm having some difficulties using it. If someone could tell me what is the best way to do that I'd be really grateful :) I also need to index objects by a… >>> More