[Syphor]

Is there anway in cocoa (Obj-C) to have a NSString (Bam) and find an occurance of "BAM" in Bam.

sorta like:

Code:
NSString *Bam = [[NSString alloc] init];
Bam = @"abc def ghi";

if (Bam contains @"def") {
     NSLog(@"Bam contains def");
}

[Ibson]

Please, search the archives. This has been asked a few times. Anyway, here's what to do:

Code:
NSString *bam;
bam = @"abc def ghi";

if ([bam rangeOfString:@"def"].location != NSNotFound)
{
     NSLog(@"bam contains def");
}

Note a few things: variables should always begin with a lowercase letter. Also, to create a constant string, you don't need to call alloc and init. If you do need to send alloc and init to a class, remember to send it an autorelease or release message, otherwise it will leak memory.

I suggest that you read a good "Beginner's Cocoa" book, or even just the tutorials provided by Apple.

[Chuckit]

More precisely, about the constant string:
First you're creating an NSString object and pointing your variable to it. Then you're creating an NXConstantString object and pointing your variable to that. Meanwhile, your original string (which you created with [[NSString alloc] init]) is left floating out in your program's memory forever. And you'll wind up with more orphaned strings every time this method runs.

Honestly, I can't think of a good reason to ever use [[NSString alloc] init]. Since it's not mutable, you've just got a blank string that's good for nothing except being destroyed.

[Syphor]

Thanks for that..

and yeah sorry I will check the archives next time

[Rickster]

Note a few things: variables should always begin with a lowercase letter.

To elabotate: obviously, you don't have to do it this way, but it's one of several common conventions followed by Cocoa programmers to make working with each other's code easier. To list a few:

• Instance variables, local variables within methods, and method signatures should start with a lowercase letter.
• Class (static) variables should start with an uppercase letter.
• Class names, category names, and exported variables and constants (such as notification names) should be prefixed with two or three uppercase letters that are shared across the project. (e.g. OAPreferencesController in the OmniAppKit framework, OWBookmark in the OmniWeb application)