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Design by contract (DbC), also known as contract programming, programming by contract and design-by-contract programming, is an approach for designing software. It prescribes that software designers should define formal , precise and verifiable interface specifications for software components , which extend the ordinary definition of abstract ...
The concept of Design by Contract, highly influential as a design and programming methodology concept and a language mechanism present in such languages as the Java Modeling Language, Spec#, the UML's Object Constraint Language and Microsoft's Code Contracts. The design of the Eiffel language, applicable to programming as well as design and ...
The design of the language is closely connected with the Eiffel programming method. Both are based on a set of principles, including design by contract, command–query separation, the uniform-access principle, the single-choice principle, the open–closed principle, and option–operand separation.
Design–build (or design/build, and abbreviated D–B or D/B accordingly), also known as alternative delivery, [1] is a project delivery system used in the construction industry. It is a method to deliver a project in which the design and construction services are contracted by a single entity known as the design–builder or design–build ...
Preconditions in object-oriented software development are an essential part of design by contract. Design by contract also includes notions of postcondition and class invariant. The precondition for any routine defines any constraints on object state which are necessary for successful execution. From the program developer's viewpoint, this ...
Command-query separation is particularly well suited to a design by contract (DbC) methodology, in which the design of a program is expressed as assertions embedded in the source code, describing the state of the program at certain critical times. In DbC, assertions are considered design annotations—not program logic—and as such, their ...
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In order to account for the unanticipated gaps in the software design, during software construction some design modifications must be made on a smaller or larger scale to flesh out details of the software design. [4] LowFan-out is one of the design characteristics found to be beneficial by researchers. Information hiding proved to be a useful ...