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Chapter 9 Access Control Fundamentals
Philosophies of performance improvement
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Recommended: Chapter 9 Access Control Fundamentals
Refactoring is the process of making code more readable and amenable to change. It stands to reason, then, that defactoring must be its opposite. This has been my task for today. Earlier this week, my code failed a review (what a surprise). The problem was with a certain construct I had used to make up for the fact that ECMAScript does not support access control with keywords like “private” or “public” as other languages do, but does so in a different way. His view is that access control is subversive, and I should rewrite it using .prototype, so that all the members are public, but make it clear by commentary, documentation, and/or some naming convention, that “private” ones are only to be used by objects of this class. I might add, this is not some subversive bit of trickery that I have invented completely off the top of my head, but one found in our bible on these matters. Of my code, he “assumes that it will be slower” than his proposed rewrite. Not a wholly unreasonable assumption, but based on nothing other than guesses. This is almost a textbook example of Premature Optimisation, it is not some piece of core functionality that will be called 1000 times a second, this is code that is likely to be executed somewhere between 0 and about 20 times on startup, depending on inputs. The only thing that keeps it from being real premature optimisation is that premature optimisation at least shaves the odd nanosecond off execution times. Quite reasonably (or so I thought), in his review comments, my nemesis said that I should feel free to disagree, and make a case for what I had done, and it can be looked at again. I did exactly that, posting my reply about half an hour after his initial review, I even ensure that words ... ... middle of paper ... ... summon up the enthusiasm to put it up for review, knowing that it’s going to fail. “We shouldn’t be doing anything that we feel might have a performance cost” a) I don’t feel it will, and I have been proven right. b) When did that edict arrive? Most of our code seems to have been written with the express purpose of being as slow as possible. Tweaks like this, even if his guesses turned out to be correct would have negligible effect due to the general stupidity of the architecture (a future post in itself) I was also chastised for doing this profiling, as, again, when you have a lot to do, the best way to make progress is to pluck random guesses out from where the sun doesn’t shine, implement them, and declare them a success. Gathering data so that you can work out where to target your efforts or measure your success, is, apparently, a massive waste of time.
basic charge of this criticism can be stated in the words of a recent critic,
He clearly states proper and valid evidence in his opposing view, while maintaining a convincing tone. Works Cited Jacoby, Jeff. A. Bring Back the Flogging. Current Issues and Enduring Questions: A Guide to Critical Thinking and Argument, with Readings. By Barnet, Sylvan and Bedau, Adam.
The first premise of his argument (P1) states Most people would agree with this premise, regardless of their specific reasoning. Connecting suffering and death to a lack of basic needs seems clear and its characterization as bad seems to be in alignment with our common sense. However, some might still object for reasons that would be challenging or impossible to refute. In spite of any such objections, the premise can be accepted and those who disagree should step away at this point.
Mr. Sumpter’s decision to establish an English-only policy at his school was not valid. The reading stated that Mr. Sumpter explained to his staff he was feeling pressure from “some people” at the district office to establish the English-only policy. However, he did not explain who “some people” were. Who were these people? If those people were the school district’s board members or superintendent, Mr. Simpter’s hands were pretty much tied. On the other hand, if the people expressing the need for English-only policies were other administrators from the school district, Mr. Simpter could have challenged their opinions on the need to change his school’s policies.
Codebreaking is a wondrous demonstration of the strength of the human mind. It is a practice that weaves together disciplines ranging from math and computing, to history and linguistics. Codebreaking, at its essence, requires the connection of disparate information: the codebreaker takes the garbage data he/she is given, and using the knowledge he/she possesses, uncovers the latent truth behind the cruft. A codebreaker, therefore, needs to possess an aptitude for seeing what others do not, the ability to find creative solutions to problems, and, of course, a great deal of patience.
...rought into the case would treat it as though it were a completely rational occurrence. But then again, this is perhaps more of a fault of my own than of the authors.
Schneier, Bruce. "Will Profiling Make a Difference?" 2010. New York Times: Room for Debate. Web. 18 June 2015.
When many people write, including myself, they get attached to their writing. Although writing can be a personal thing, I’ve learned that it is important to step away from your paper, and take the feedback on an objective level. The first time I got feedback, I had an overwhelming urge to defend myself. I remember reading that my introduction wasn’t complete, and that my evidence wasn’t properly introduced. I wanted to walk up to those who critiqued my paper, and spit right in their faces. ‘How dare they say bad things about my paper?’ I thought to myself. From here, I went back into my essay, and looked at what they had told me were errors. It was then that I realized that they were right. My introduction needed more background information, and my evidence should have had more of an introduction. They weren’t trying to be mean; they were just helping me receive a better grade, by looking at my essay through an objective view. Now, I go out of my way to ask people for feedback, and tell them to be honest. I want my paper to be the very best it can be, so it isn 't helpful when people hold back. I now understand that those giving feedback aren’t insulting me, or the paper; they are just suggesting ways to improve, or enhance my ideas. Giving and receiving feedback is a hard, yet important skill to learn, and hope to continue improving in this
Winnerman, L. (2004, August 1). Criminal profiling: the reality behind the myth. American Psychological Association. Retrieved , from http://www.apa.org/monitor/julaug04/criminal.aspx
When it comes to profiling, it is a very controversial tool, although within the past couple decades it has increased in use significantly. One huge controversy is the fact that not a lot of people believe that a hypothetical depiction of a suspect actually helps contribute to solving crimes, however, a lot of the profiles for serial killers in the past have been incredibly accurate. There is, however, a lack of scientific evidence to support these techniques. With the lack of a scientific basis, the question of the validity that profiling brings to investigations arises often. The main issue is that no one knows if they have a good portrait until the suspect is caught.
Snook, B., Eastwood, J., Gendreau, P., Goggin, C., & Cullen, R. M. (2007). Taking stock of criminal profiling: A narrative review and meta-analysis. Criminal Justice And Behavior, 34(4), 437-453. doi:10.1177/0093854806296925
Throughout the history of criminal profiling people have had concerns about whether or not it actually works and/or helps find
... am to get a halfway decent grade. So, I started it up and felt confident that I was going to get it done.
Profiling: an invaluable tool for catching criminals and killers. Profiling is a relatively new approach to crime solving, put in place by forensic psychiatrists. Criminal profiling is the process by which a practitioner analyses information from a crime scene in order to create physical and psychological profile of the perpetrator. All information from a crime scene is a reflection of the criminal's behavior. And this behavior can create a surprisingly accurate picture of the offender. (Forensic FAQ p. 2)
justified in the light of what he writes in the Appendix (p.145-149) to Part1: Concerning