collections - Remove item from groovy list -

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i trying remove item groovy list. i've tried following:

    list<user>  availableusers = []      availableusers = workers      (int = 0; < availableusers.size(); i++) {         if (availableusers[i].equals(user)){             availableusers.drop(i)             break         }     }

i've tried:

availableusers.remove(user)

in both cases list gets emptied. have idea what's going on?

fildor right, if want ot remove first occurence of user in list (minus remove occurrences), need like:

list = list.indexof( user ).with { idx ->   if( idx > -1 ) {     new arraylist( list ).with { ->       a.remove( idx )           }   }   else list }

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