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- Command–query_separation abstract "Command–query separation (CQS) is a principle of imperative computer programming. It was devised by Bertrand Meyer as part of his pioneering work on the Eiffel programming language.It states that every method should either be a command that performs an action, or a query that returns data to the caller, but not both. In other words, asking a question should not change the answer. More formally, methods should return a value only if they are referentially transparent and hence possess no side effects. It is noteworthy that rigid implementation of this specification makes tracking the number of times queries have been issued essentially impossible; it is clearly intended as a programming guideline rather than a rule for good coding, such as avoiding the use of a goto from a nested loop.".
- Command–query_separation wikiPageID "291789".
- Command–query_separation wikiPageRevisionID "606716031".
- Command–query_separation subject Category:Object-oriented_programming.
- Command–query_separation subject Category:Programming_principles.
- Command–query_separation comment "Command–query separation (CQS) is a principle of imperative computer programming. It was devised by Bertrand Meyer as part of his pioneering work on the Eiffel programming language.It states that every method should either be a command that performs an action, or a query that returns data to the caller, but not both. In other words, asking a question should not change the answer.".
- Command–query_separation label "Command–query separation".
- Command–query_separation sameAs Command%E2%80%93query_separation.
- Command–query_separation sameAs Command-Query-Separation.
- Command–query_separation sameAs Command–query_separation.
- Command–query_separation sameAs Q3954590.
- Command–query_separation sameAs Q3954590.
- Command–query_separation wasDerivedFrom Command–query_separation?oldid=606716031.