Extracting a small segment of NSString

Question

I have an array and the contents look something like this:

    "user/01453303276519456080/state/com.google/starred",
    "user/01453303276519456080/state/com.google/broadcast",
    "user/01453303276519456080/label/comics",
    "user/01453303276519456080/label/General News",
    "user/01453303276519456080/label/iPhone Related News",
    "user/01453303276519456080/label/Programming",
    "user/01453303276519456080/label/Sports",
    "user/01453303276519456080/label/Tech News",
    "user/01453303276519456080/label/Tutorials",
    "user/01453303276519456080/state/com.blogger/blogger-following"

I want to extract only the last words after "/" (e.g. General News, Programming, etc) The unique id after user/ will not be constant.

Can someone give me an idea to implement this?

Cheers, iSEE

score 3 · Accepted Answer · answered Jan 18 '11 at 10:12

3

You can use lastPathComponent API of NSString over each strings of the array.

answered Jan 18 '11 at 10:12

YPK

1,851
18
18

Thanks for the lastPathComponent API solved it. Since you answered it before Sven, I mark this the correct answer.... – iSee Jan 18 '11 at 10:25

score 2 · Answer 2 · answered Jan 18 '11 at 10:13

2

Look at the lastPathComponent method of NSString. This should give you exactly what you want. If you need the other parts too you can use the method componentsSeperatedByString: or use a NSScanner.

answered Jan 18 '11 at 10:13

Sven

22,475
4
52
71

If you need to break up the string by the / delimiter, see http://stackoverflow.com/questions/259956/nsstring-tokenize-in-objective-c which has a good, quick example. – phaxian Jan 18 '11 at 10:25

score 2 · Answer 3 · answered Jan 18 '11 at 10:18

2

use this

for(int i=0;i<[yourArray count];i++)
{
  NSMutableArray *tempArray=[[[NSMutableArray alloc] init] autorelease];
  string=[yourArray objectAtIndex:i];       
  tempArray=[[string componentsSeparatedByString:@"/"] mutableCopy];
  //use tempArray

}

now tempArray having all strings at different indexes, fetch them according to you

answered Jan 18 '11 at 10:18

Ishu

12,797
5
35
51

no need to allocate a mutable array object, and then throw it away. the object you allocated is never used again – user102008 Feb 01 '11 at 05:43
@user102008, i am making NSMutableArray because you cant call objectAtIndex and other methods on NSArray. – Ishu Feb 01 '11 at 05:59

score -1 · Answer 4 · answered Jan 18 '11 at 10:41

-1

for(int i=0;i<[myArray count];i++)
{
  NSMutableArray *tempArray=[[[NSMutableArray alloc] init] autorelease];
  string=[myArray objectAtIndex:i];
  NSArray *arr=[string componentsSeparatedByString:@"/"];
  tempArray=[arr objectAtIndex:([arr count]-1)];

}

Now this tempArray contains the last components as u want

Hope it will help u!

answered Jan 18 '11 at 10:41

Sudhanshu

3,950
1
19
18

wow, this is terrible. `tempArray` is declared as an `NSMutableArray` but then you assign a string to it – user102008 Feb 01 '11 at 05:42

Extracting a small segment of NSString

4 Answers4