Question

I have two comma seperated NSString‘s & I want to remove the similar characters from first string only.

ex. str1 = 0,1,2,3
    str2 = 1,2.
    output -> str1 = 0,3 and str2 = 1,2.

I have one option that, seperate both the string with comma seperated values in a array. But it requires two NSArray‘s & apply loop and then remove the common elements, but it is very tedious job.
So I want some simple & proper solution which avoid the looping.

kindly help me to sort out this.

Answer 1

Try this one:

No loop is required!!!

You have got all the required APIs.

NSString *str1=@"0,1,2,3";
NSString *str2=@"1,2";

NSMutableArray *arr1=[[NSMutableArray alloc]initWithArray:[str1 componentsSeparatedByString:@","]];

[arr1 removeObjectsInArray:[str2 componentsSeparatedByString:@","]];
NSLog(@"arr1 %@",arr1);
/*
NSMutableString *finalString=[NSMutableString new];

for (NSInteger i=0; i<[arr1 count]; i++) {
    NSString *str=[arr1 objectAtIndex:i];

    [finalString appendString:str];
    if (i!=[arr1 count]-1) {
      [finalString appendString:@","];  
    }
}
*/
NSString *finalString=[arr1 componentsJoinedByString:@","];
NSLog(@"finalString %@",finalString);