Difference between revisions of "Once and Only Once"
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[https://wiki.c2.com/?OnceAndOnlyOnce OAOO] or [https://wiki.c2.com/?OnceAndOnlyOnce Once and Only Once] is an article written on [wiki.c2.com wiki.c2.com], a website<ref>{{cite web:c2.com}}</ref> by Warningham dedicated to Software Engineering concepts. | [https://wiki.c2.com/?OnceAndOnlyOnce OAOO] or [https://wiki.c2.com/?OnceAndOnlyOnce Once and Only Once] is an article written on [wiki.c2.com wiki.c2.com], a website<ref>{{:cite web:c2.com}}</ref> by Warningham dedicated to Software Engineering concepts. | ||
My interest in OAOO was triggered by discussing it with my older son. While classifying functions, there are three generic types, [[injective]], [[surjective]], and [[bijective]]. In the case of bijective functions, every element in the domain must be mapped to elements in the [[codomain|target domain]], once and only once. | My interest in OAOO was triggered by discussing it with my older son. While classifying functions, there are three generic types, [[injective]], [[surjective]], and [[bijective]]. In the case of bijective functions, every element in the domain must be mapped to elements in the [[codomain|target domain]], once and only once. | ||
Operationally, there is a term called: [[Idempotence]], which is also related to the idea of [[Once and only once]]. | |||
=References= | =References= | ||
Latest revision as of 13:11, 1 August 2021
OAOO or Once and Only Once is an article written on [wiki.c2.com wiki.c2.com], a website[1] by Warningham dedicated to Software Engineering concepts.
My interest in OAOO was triggered by discussing it with my older son. While classifying functions, there are three generic types, injective, surjective, and bijective. In the case of bijective functions, every element in the domain must be mapped to elements in the target domain, once and only once.
Operationally, there is a term called: Idempotence, which is also related to the idea of Once and only once.
References
- ↑ Cunningham, Ward. WikiWiki Website by Ward Cunningham. Retrieved July 4, 2021.