TextViewController.m

/*
    This code present a way to implement textView:doCommandBySelector, as sent by an NSTextView to its delegate, and implement the method as - (BOOL) method: (NSTextView*)aTextView and avoid the need for if statement chaining.

*/
- (BOOL)textView:(NSTextView *)aTextView doCommandBySelector:(SEL)aSelector {
	if ([self respondsToSelector: aSelector]) {
		BOOL (*method)(id, SEL, NSTextView*);
		method = (BOOL (*)(id, SEL, NSTextView*))[self methodForSelector: aSelector];
		return method(self, aSelector, aTextView);
	} else {
		return NO;
	}
}