Delete items in a seq while iterating over it?

[doofenstein]

what I usually do is something like this:
    
    
    var i  = 0
    while i < myseq.len:
      if deleteCond:
        myseq.del i
      else:
        i += 1
    
    
    Run

it also works with both delete and del, but is admitedly not that pretty.