Function "contains" in HOME and CAS - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: HP Prime (/forum-5.html) +--- Thread: Function "contains" in HOME and CAS (/thread-9838.html) Function "contains" in HOME and CAS - JMB - 01-02-2018 03:15 PM I've found a different behavior of the function "contents" in HOME and CAS, in the following situation: L1:={"A","B"} In CAS contains(L1,"A") -> 1 contains(L1,"B") -> 2 In HOME contains(L1,"A") -> 0 !!! contains(L1,"B") -> 0 !!! RE: Function "contains" in HOME and CAS - salvomic - 01-02-2018 03:18 PM its name is in lowercase, so I think it should be only a CAS command (not Home)... RE: Function "contains" in HOME and CAS - JMB - 01-02-2018 03:27 PM (01-02-2018 03:18 PM)salvomic Wrote:  its name is in lowercase, so I think it should be only a CAS command (not Home)... Agreed, but when L1 is filled with numbers instead of strings, it works correctly both in CAS and HOME. RE: Function "contains" in HOME and CAS - DrD - 01-02-2018 03:29 PM The lower case [CAS] command can work the same way in [Home] if you provide a CAS wrapper: [CAS] contains(L1,"A"); ==> 1 [Home] CAS(contains(L1,"A")); ==> 1 RE: Function "contains" in HOME and CAS - JMB - 01-02-2018 06:18 PM Ok, I realize that the safe way to execute a CAS function in HOME is to use the structure CAS(CAS_function). What still bothers me is that you can use the CAS function directly in HOME and, depending on the arguments, get correct or incorrect results. As I said before, when L1 contains numbers instead of strings "contains" works correctly both in HOME and CAS. RE: Function "contains" in HOME and CAS - Voldemar - 01-02-2018 06:32 PM (01-02-2018 03:29 PM)DrD Wrote:  The lower case [CAS] command can work the same way in [Home] if you provide a CAS wrapper: [CAS] contains(L1,"A"); ==> 1 [Home] CAS(contains(L1,"A")); ==> 1 How does it work in RPN mode? RE: Function "contains" in HOME and CAS - cyrille de brĂ©bisson - 01-08-2018 06:10 AM Hello, home contains(L1, "A") will cause A to be parsed as a CAS command line before the switch to CAS mode and the execution of contains. Assuming that the var A contains 0, what you execute is: contains(L1,0). CAS(contains(L1,"A")) will not cause a parse of the string. Subtelties of HOME/CAS interraction :-) Cyrille RE: Function "contains" in HOME and CAS - Didier Lachieze - 01-08-2018 07:00 AM (01-02-2018 06:32 PM)Voldemar Wrote:   (01-02-2018 03:29 PM)DrD Wrote:  [Home] CAS(contains(L1,"A")); ==> 1 How does it work in RPN mode? 'contains(L1,"A")' Enter CAS(1) Enter RE: Function "contains" in HOME and CAS - Carlos295pz - 01-08-2018 07:56 AM It is as indicated by Cyrille, it is due to the topic of Home/CAS interaction, since strings are interpreted by using CAS commands such as contains, head, solve, etc. (similar post http://www.hpmuseum.org/forum/thread-8149.html) It can be said that all CAS functions (~ lowercase commands) will present this interpretation of a string data. This article Home/CAS-Spanish may be useful. Correct use under this consideration: CAS(contains(L1,"A")) contains(L1,("A")) contains(L1,'"A"') contains(L1,"A"+"") LOCAL Strg="A" contains(L1,Strg)