Add Baklava in Objective C (#4118)

Author: rzuckerm

archive/o/objective-c/baklava.m

@@ -0,0 +1,35 @@
+#import <Foundation/Foundation.h>
+
+// Source:
+// https://stackoverflow.com/questions/260945/create-nsstring-by-repeating-another-string-a-given-number-of-times
+@interface NSString (Baklava)
+- (NSString *) repeatString: (NSUInteger) times;
+@end
+
+@implementation NSString (Baklava)
+- (NSString *) repeatString: (NSUInteger) times {
+    return [
+        @"" 
+        stringByPaddingToLength: [self length] * times
+        withString:self startingAtIndex: 0
+    ];
+}
+@end
+
+int main(int argc, const char * argv[]) {
+    NSAutoreleasePool *pool =[[NSAutoreleasePool alloc] init];
+
+    int i;
+    for (i = -10; i <= 10; i++) {
+        int numSpaces = abs(i);
+        int numStars = 21 - 2 * numSpaces;
+        printf(
+            "%s%s\n",
+            [[@" " repeatString: numSpaces] UTF8String],
+            [[@"*" repeatString: numStars] UTF8String]
+        );
+    }
+
+    [pool drain];
+    return 0;
+}