How can I find out how many positions there are in a table? 

L:=[[name,4,3,6,5],[3,5,name],[3,6,1,2,9,8]]   I want to remove name from the listlist or all 3's for example

I've tried

remove(has,L,3) which removes the entire sublists containing 3 so I tried

map(remove,`=`,L,3) but that doesn't work I thought since remove(`=`,L,3) worked on a flatlist that using map would work on the listlist or even map2(map,remove,`=`,L,3).  I can't figure it out.

And how do you use member on L?  I end...

I would like to include the current date in the filename when I use writedata.  How can I do that?

I know this doesn't work but I was trying to do something like this

  test:=[1,2,3,4,5,6]
  writedata("c:/data-FomatTime(%B%d%H%M).txt",test)

I'm trying to hide all text created in text mode (F5) so that all I see are the calculations or text typed in Math mode.  How do I do that? 

I could create subsections with text but that's bulky.  I've tried document blocks but that only hides the calculations, the opposite of what I wanted.  Have I missed something?

After I have opened internet explorer with Maple

process[launch]("C:/Program Files/Internet Explorer/iexplore.exe")

what command do I use to close it with maple?