Assuming you're after a generic solution, whereby the symbol might be anything, could occur at any position in the list, there could be more than one symbol, and the list could also include integers and/or floats:
thx. the first solution is what i need.
'cause the symbol is not always at the same place and i have to detect when there's a symbol too.
but yes i know zl slice. :-) it was noty so simple but i didn't say it. sorry.