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can_i_rebind_roles_to_objects_multiple_times_over_the_lifetime_of_a_context_object

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can_i_rebind_roles_to_objects_multiple_times_over_the_lifetime_of_a_context_object [2014/12/05 14:06]
jcoplien created
can_i_rebind_roles_to_objects_multiple_times_over_the_lifetime_of_a_context_object [2015/11/27 03:49] (current)
gazoot Added title, updated formatting
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 +====== Can I rebind Roles to objects multiple times over the lifetime of a Context object? ======
 +
 2014-12-05 13:57 GMT+01:00 James O Coplien <​jcoplien@gmail.com>:​ 2014-12-05 13:57 GMT+01:00 James O Coplien <​jcoplien@gmail.com>:​
-Jim Coplien asked Rune, on 5December ​2014:+Jim Coplien asked Rune, on 5 December ​2014:
  
 //Can you please explain for us why you made such rebinding illegal? :-) I sense some unclarity about this. ;-)// //Can you please explain for us why you made such rebinding illegal? :-) I sense some unclarity about this. ;-)//
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 Another example would be that of a computer. Let's say the computer is the context how many role players can I replace with other players before it's a new context? Can I rebind the CPU role? GPU role? the Chassis role? if so can I rebind all of them and still claim it's the same computer? Another example would be that of a computer. Let's say the computer is the context how many role players can I replace with other players before it's a new context? Can I rebind the CPU role? GPU role? the Chassis role? if so can I rebind all of them and still claim it's the same computer?
  
-That's the mental model argument. +That's the mental model argument. Another would be based on an example:
- +
-Another would be based on an example+
  
 I have a context with two accounts and I want to transfer money between the two. I have a context with two accounts and I want to transfer money between the two.
 Would I want during the execution of said context that one of the accounts is changed? Would I want during the execution of said context that one of the accounts is changed?
 +
 I'd then transfer out of account A believing the money would go to account B but in between I switched the roleplayer to account C (or at least if the role binding is mutable I don't know if that happened) So if that can happen how do I reason about the code from reading the context source? ​ I need to know how the roleplayers might affect the context during execution however in that case I can only know the roleplayers at compile time if I can solve an NP-complete problem. ​ I'd then transfer out of account A believing the money would go to account B but in between I switched the roleplayer to account C (or at least if the role binding is mutable I don't know if that happened) So if that can happen how do I reason about the code from reading the context source? ​ I need to know how the roleplayers might affect the context during execution however in that case I can only know the roleplayers at compile time if I can solve an NP-complete problem. ​
can_i_rebind_roles_to_objects_multiple_times_over_the_lifetime_of_a_context_object.txt · Last modified: 2015/11/27 03:49 by gazoot