Re: [tlaplus] How to remove an iterm from a Sequence?

[Stephan Merz <stephan.merz@xxxxxxxxx>]

You could write something like

SelectSeq(seq, LAMBDA x : x # item)

to obtain a sequence with all occurrences of `item' removed. However, it sounds a little strange to me that you model a queue where the order of elements matters while duplicates are eliminated. If the order is unimportant as well, it would be simpler to use a set.

Regards,

Stephan

On 26 May 2020, at 05:18, diaozengqi@xxxxxxxxxxx wrote:

Dear all,

I'm writing a TLA program to process a message queue whlle I must remove a duplicate item from the sequence when a new message is added to the message queue. How could I do this with TLA module? Or I must write a function to deal with it?

Thanks

Regards

Diao Zegnqi.

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