tasks a-s

Task/Reverse-a-string/Objective-C/reverse-a-string-1.m

@@ -0,0 +1,20 @@
+#import <Foundation/Foundation.h>
+
+@interface NSString (Extended)
+-(NSString *)reverseString;
+@end
+
+@implementation NSString (Extended)
+-(NSString *) reverseString
+{
+    NSUInteger len = [self length];
+    NSMutableString *rtr=[NSMutableString stringWithCapacity:len];
+    //        unichar buf[1];
+
+    while (len > (NSUInteger)0) {
+        unichar uch = [self characterAtIndex:--len];
+        [rtr appendString:[NSString stringWithCharacters:&uch length:1]];
+    }
+    return rtr;
+}
+@end

Task/Reverse-a-string/Objective-C/reverse-a-string-2.m

@@ -0,0 +1,11 @@
+int main()
+{
+    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+
+    NSString *test = [@"!A string to be reverted!" reverseString];
+
+    NSLog(@"%@", test);
+
+    [pool release];
+    return 0;
+}

Task/Reverse-a-string/Objective-C/reverse-a-string-3.m

@@ -0,0 +1,20 @@
+#import <Foundation/Foundation.h>
+
+@interface NSString (Extended)
+-(NSString *)reverseString;
+@end
+
+@implementation NSString (Extended)
+-(NSString *)reverseString
+{
+	NSInteger l = [self length] - 1;
+	NSMutableString *ostr = [NSMutableString stringWithCapacity:[self length]];
+	while (l >= 0)
+	{
+		NSRange range = [self rangeOfComposedCharacterSequenceAtIndex:l];
+		[ostr appendString:[self substringWithRange:range]];
+		l -= range.length;
+	}
+	return ostr;
+}
+@end

Task/Reverse-a-string/Objective-C/reverse-a-string-4.m

@@ -0,0 +1,11 @@
+int main()
+{
+    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+
+    NSString *test = [@"as⃝df̅" reverseString];
+
+    NSLog(@"%@", test);
+
+    [pool release];
+    return 0;
+}