valueForKeyPath: @"@max.self" not work when number is 100

Question

NSArray *vals = {100,100,50,50,50}
maximumValue = [[vals valueForKeyPath: @"@max.self"] intValue];

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Returns

maximumValue : 50

Answer 1

NSArray *vals = @[@100,@100,@50,@50,@50];

NSLog(@"%d",[[vals valueForKeyPath: @"@max.self"] intValue]