Find occurrences of substring within a string.

[rahul]

Can any one help me to find out count of occurrences substring within a string.

NSString *str = @"The Quick Brown Fox Brown";

i want count of occurrence of word "Brown" from above string.

Thanks

[reena]

Originally Posted by rahul

Can any one help me to find out count of occurrences substring within a string.

NSString *str = @"The Quick Brown Fox Brown";

i want count of occurrence of word "Brown" from above string.

Thanks

NSString *str = @"The Quick Brown Fox Brown";
NSInteger count = 0;
NSArray *arr = [str componentsSeparatedByString:@" "];
for(int i=0;i<[arr count];i++)
{

if([[arr objectAtIndex:i] isEqualToString:@"Brown"])

count++;

}

[david_david]

is it okay ?.

NSString *str = @"The Quick Brown Fox Brown";
NSArray *arr = [str componentsSeparatedByString:@"Brown"];
NSLog(@"count = %i", [arr count]-1);

[rahul]

Thanks for reply,

Can i get location of each occurrences of searched word from text
I can get searched word location but it gives me location of first occurrence of searched word within text. I want locations of all occurrences of searched word.

[bitwes]

Originally Posted by rahul

Thanks for reply,

Can i get location of each occurrences of searched word from text
I can get searched word location but it gives me location of first occurrence of searched word within text. I want locations of all occurrences of searched word.

I wrote this C style (I guess) instr cause I like "instr" and didn't want to do this twice. returns the location of searchFor in searchIn, returns -1 when not found. You can use startingAt to iterate over the string and count the number of times one string occurs in another.

int instr(NSString *searchFor, NSString *searchIn, int startingAt){
	NSRange searchRange;
	int retVal;
	
	searchRange.location = startingAt;
	searchRange.length = [searchIn length] - startingAt;
	
	NSRange foundRange = [searchIn rangeOfString:searchFor options:0  range:searchRange];
	if(foundRange.length > 0){
		retVal = foundRange.location;
	}else{
		retVal = -1;
	}
	
	return retVal;
}

[sumanth]

NSString *full_string=@"The Quick Brown Fox Brown";
	NSMutableArray *countloc=[[NSMutableArray alloc]init];
	int temp=0;
	int len=[full_string length];
	for(int i =0;i<[full_string length];i++)
	{
			NSRange range=[full_string rangeOfString:@"Brown" options:0 range:NSMakeRange(temp,len-1)];
			if(range.location<[full_string length])
			[countloc addObject:[NSString stringWithFormat:@"%d",range.location]];
			temp=range.location+1;
			len=[full_string length]-range.location;
			i=temp;

	}

Here searching for the substring Brown and
Location of the substring is stored in the array countloc