By Dean Kaplan
Think you may have the following nice BlackBerry app notion? The BlackBerry program cartoon Book is an important device for any aspiring BlackBerry developer. This caricature booklet makes it effortless to centralize and manage your principles, that includes enlarged BlackBerry templates to jot down on. Professionally revealed on top quality paper, it has a complete of one hundred fifty gridded templates so you might draft rules and doodle designs whereas supplying considerable room to make notes and record the app identify and monitor identify. This e-book is a useful instrument for bringing your subsequent nice BlackBerry app proposal to life!
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Extra resources for BlackBerry Application Sketch Book
An actor is a generic way ofdescribing thepotential users of the system. Actors are represented as stick persons in usecasediagrams. In identifying actors, wewill need to consider scenarios or situations typical to the system andits use. Note that the users arenot necessarily human;they may also be external systemsthat use an application through its system interfaces. Am e r important distinction is between actors andusers. Actors are types while users denote particular instances of these types.
Smalltalkalso included the concepts of inheritance and polymorphism that made it possible to create reusable class libraries, for instance to support user interface management. Inspired by the success ofSmalltalk, several groups introduced object-oriented concepts into procedureprogramminglanguage,whichled to the creation of hybrid object-oriented languages. Bjaeme Stroustrup ledadevelopmentat AT&T Bell Labs, wherehis group 32 Designing Distributed Objects extended the C programming language with object-oriented concepts into C++ [Stroustrup, 19861.
These copies, however,need to be tied together. If theymaintainaninternal state, that state needs to be synchronized in all copies. We refer to copies o f components that meet this requirement as replicus. The process of creating a replica and keepingthe replicas up-to-date with the originalisreferred to as replication. Replication isused to improve the overall Arepticaisacomponent COPY thatremains synchronized with its original, 4 22 Distributed Systems performance and to make systemsmore scalable.
BlackBerry Application Sketch Book by Dean Kaplan