You can use key-path collection operators, assuming someTrips is a property of self:
NSNumber *minPrice = [self valueForKeyPath:@"sometri...@min.adultfinalprice"]; NSNumber *maxPrice = [self valueForKeyPath:@"sometri...@max.adultfinalprice"]; By the way, minValue and maxValue in your example need to be declared with __block or they'll be captured as read-only constants. Preston Sumner On Jul 12, 2010, at 1:34 AM, Giannandrea Castaldi wrote: > Hi, > I want to use blocks to extract the min price and the max price from > an NSArray of trips. I've found the following way: > > float minValue = 0.0; > [someTrips enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, > BOOL *stop) { > if (minValue == 0.0 || [[obj adultFinalPrice] floatValue] < minValue) { > minValue = [obj floatValue]; > } > }]; > float maxValue = 0.0; > [someTrips enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, > BOOL *stop) { > if (maxValue == 0.0 || [[obj adultFinalPrice] floatValue] > maxValue) { > maxValue = [obj floatValue]; > } > }]; > > I've just begun to use blocks and I wonder if there is a more brief > way, may be without the need to define the float variables before the > iterations. > > I've also looked for a solution with NSExpression and NSPredicate with > the function min/max but if I've correctly understood the use of > NSExpression and NSPredicate with such functions is only for CoreData. > Thanks. > > Jean > -- > “We are what we repeatedly do. Excellence then, is not an act, but a habit.” > Aristotle > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/preston.sumner%40gmail.com > > This email sent to preston.sum...@gmail.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com