also, is there a simple way, given a sequence, to remove the first match and leave the rest?

(specter/setval [specter/ALL (specter/pred= 1)] specter/NONE [1 2 1 3])

this removes all the matches

@currentoor In that case you can do (s/setval [(s/filterer (s/pred= 1)) s/FIRST] s/NONE [1 2 1 3])

cool thanks!

Or, hm it doesn't work as I expected

game.core> (s/setval [(s/filterer (s/pred= 1)) s/FIRST] s/NONE [1 2 1 3])
[1 2 3]

@currentoor Did you notice?

yeah i would too

but actually i just need to remove one occurrence of an element

so this works

hehe