use-case

问题 I use the identity function in all my JavaScript programs: function identity(value) { return value; } The reason is that I often need differentiate between primitives types ( undefined , null , boolean , number and string ) and object types ( object and function ) as returned by the typeof operator. I feel using the indentity function for this use case very succuint: if (new identity(value) == value); // value is of an object type if (new identity(value) != value); // value is of a primitive

问题 I use the identity function in all my JavaScript programs: function identity(value) { return value; } The reason is that I often need differentiate between primitives types ( undefined , null , boolean , number and string ) and object types ( object and function ) as returned by the typeof operator. I feel using the indentity function for this use case very succuint: if (new identity(value) == value); // value is of an object type if (new identity(value) != value); // value is of a primitive

问题 So my question is as follows, is it possible to move an actor inside the system boundary of a use case diagram? Can it be a part of the system. I set a server as an actor, in where a customer interacts with the server in an e-commerce environment. Is it possible or should I move the server inside of the system? Since the server is a part of the system that the customer is interacting with. This server is most likely then going to be used by an admin role. 回答1: TL;DR No, you can't do that,

问题 This question already has answers here : What's is the difference between include and extend in use case diagram? (19 answers) Closed last year . what is the difference between extends and includes in usecase UML? if I hava login usecase and and addGroup usecase, the admin should login to be able to add group , what is the relation here?? 回答1: One means it is done in the context of of another (almost like a function call) and the other means it is done as an alternative as another. Be careful

问题 This question already has answers here : What's is the difference between include and extend in use case diagram? (19 answers) Closed last year . what is the difference between extends and includes in usecase UML? if I hava login usecase and and addGroup usecase, the admin should login to be able to add group , what is the relation here?? 回答1: One means it is done in the context of of another (almost like a function call) and the other means it is done as an alternative as another. Be careful

问题 I am finding it confusing about how detailed each oval/elliptical element should be in a Use Case diagram. I feel like i should be making each process i see as an oval, but then when i look at examples, they don't always do that, and instead detail them in the flow description. I can't understand how to separate this. For example, here is my requirement to map out: A user should be able to create and assign a Note to himself or another user, depending on security privileges. The search can

问题 Let's take a social group system as example; Actors are the Admin and the Moderator. Use Cases : ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ (Delete posts) ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎‏‏‎ / ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ moderator --- (Report Post) ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏⬆️ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ Admin --- (Manage roles) Moderator's posts can be changed by admin, for example

问题 For a school assignment, we have to make a Usecase diagram. But the documentation that we have, is not very extended. It just describes what components a usecase consists of, and one example. We have to make a usecase about a library system. We have found 11 usecases, but I won't bother you with all of them. IIRC, a usecase describes a typical usage of a system, right? But what things belong on a usecase diagram, and how do they connect together? What we have now are four actors (member,

问题 I have been reading documentation and watching screencasts specific to Mongo DB over the past few days and I am at a loss for when a solution like this would be better than a typical pg or mysql environment. Specifically, my question is under what circumstance (w/ use case would be nice) would you want to go the nosql route? Thanks! 回答1: Many disparate writers. Especially when the writers can get segmented due to disconnections in the network, and will later need to resync data that has been

问题 I have been reading documentation and watching screencasts specific to Mongo DB over the past few days and I am at a loss for when a solution like this would be better than a typical pg or mysql environment. Specifically, my question is under what circumstance (w/ use case would be nice) would you want to go the nosql route? Thanks! 回答1: Many disparate writers. Especially when the writers can get segmented due to disconnections in the network, and will later need to resync data that has been