How can I join a string repeatedly?

Question

Hello everyone. I want to do something like:

string s1 set to null
s2: "abc"

repeat 10 times

s1=s1+s2

How can I do this in objective-c?

Answer 1

I am not sure but make a loop

for(i=0;i<10;i++)
{
   s1=s1+s2;
}

Answer 2

Is this suitable?:

NSMutableString *s1 = [[NSMutableString alloc] initWithString:@""];
NSString *s2 = @"abc";

for(NSInteger idx = 0; idx < 10; ++idx) {
   [s1 appendString:s2];
}

...

[s1 release];

Answer 3

Although @thatsdisgusting gave a perfect answer, here's a shortcut:

NSMutableString *a = [NSMutableString stringWithCapacity:0];
NSString *pad = @"abc";
NSString *ret = [a stringByPaddingToLength:10*[pad length] withString:pad
                                                           startingAtIndex:0];

abusing stringByPaddingToLength.