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  • --the same item can be selected multiple times-- Is there a limit? Commented Nov 24, 2023 at 14:15
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    Just because it is Friday afternoon: imgur.com/a/JDXdOmD :-) Commented Nov 24, 2023 at 16:48
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    I have never seen something like this. Furthermore, I think it defeats the purpose of using list boxes and it's probably an anti-pattern. Do you have an example where you have seen this so we can understand the rationale? Because it's very likely you need to use another pattern rather than this one Commented Nov 24, 2023 at 17:42
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    Is the order of the selection important? Otherwise it may make more sense to group identical items and add a quantity? Commented Nov 25, 2023 at 13:19
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    Does the final sequence matter? e.g. if they add A,A,B,A,B do you want to maintain that or is A×3, B×2 preferred/acceptable Commented Nov 25, 2023 at 16:00