CODEWITHSUNDEEP
iphoneobjective-ciosnsstring
QueueOverFlow
QueueOverFlow

Reputation: 1336

occurrence of a character in a NSString

I am googling NSSting manipulation methods from last few hours. and found many on stack overflow like this here

I have a String "1800 Ellis St, San Francisco, CA 94102, USA". String may have any number of "," . I have to take the third last(San Franncisco) and last(USA) substring after ",".

and output should be "San Franncisco USA".

I have logic how to do this in my mind that but I am struggling to implement it.

I try this code for getting the position of last three "," in string. but it's not work for me 

 NSInteger commaArr[3];

        int index=0;   
        int commaCount=0;

        for(unsigned int  i =  [strGetCityName length]; i > 0; i--)
        {
            if([strGetCityName characterAtIndex:i] == ',')
            {

                commaArr[index]=i;
                index++;
                ++commaCount;
                if(commaCount == 3)
                {
                    break;
                }
            }
        }

Thanks

Upvotes: 0

Views: 163

Answers (3)

Nikolai Ruhe
Nikolai Ruhe

Reputation: 81848

NSString *s = @"1800 Ellis St, San Francisco, CA 94102, USA";
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"^(?:[^,]*,)?\\s*([^,]*),\\s*(?:[^,]*),\\s*([^,]*)$" options:0 error:NULL];
NSString *result = [regex stringByReplacingMatchesInString:s options:0 range:NSMakeRange(0, [s length]) withTemplate:@"'$1 $2'"];

Upvotes: 1

Sergey Kalinichenko
Sergey Kalinichenko

Reputation: 726479

You can do it like this:

NSString *s = @"1800 Ellis St, San Francisco, CA 94102, USA";
NSArray *parts = [s componentsSeparatedByString:@","];
NSUInteger len = [parts count];
NSString *res;
if (len >= 3) {
    res = [NSString stringWithFormat:@"%@%@", [parts objectAtIndex:len-3], [parts objectAtIndex:len-1]];
} else {
    res = @"ERROR: Not enough parts!";
}

The componentsSeparatedByString: will split the string at ,, and stringWithFormat: will put the parts back together.

Upvotes: 2

Ismael
Ismael

Reputation: 3937

Try this:

NSString *string = @"1800 Ellis St, San Francisco, CA 94102, USA";
NSArray *components = [string componentsSeparatedByString:@","];
NSString *sanFrancisco = [components objectAtIndex:components.count - 3];
NSString *usa = [components objectAtIndex:components.count - 1];
NSString *result = [sanFrancisco stringByAppendingString:usa];

Upvotes: 0

Related Questions