Re: opposite of AppendTo
- To: mathgroup at smc.vnet.net
- Subject: [mg124367] Re: opposite of AppendTo
- From: Fred Simons <f.h.simons at tue.nl>
- Date: Tue, 17 Jan 2012 05:57:54 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <201201162212.RAA15438@smc.vnet.net>
Is this what you are looking for?
In[8]:= Attributes[mydelete]={HoldFirst};
mydelete[s_, e_] := s=DeleteCases[s,e]
In[10]:= s=Range[5];
mydelete[s,3];
s
Out[12]= {1,2,4,5}
Fred Simons
Eindhoven University of Technology
Op 16-1-2012 23:12, burke schreef:
> AppendTo[s,e] appends "e" to "s" and then RESETS "s". How does one
> delete or remove an element "e" from a list "s" and then RESET "s"?
> The _reset_ is my problem. I want to be able to add and delete
> elements of a list (a list of graphical elements with very low
> opacity). I can "appendto" the list at will but am unable to delete
> elements (using Delete, DeleteCases, Except, Select, etc.). Deleting
> "e" from "s" is easy enough, but resetting "s" seems impossible.
> Help!!
>
>
- References:
- opposite of AppendTo
- From: burke <burket@mailbox.sc.edu>
- opposite of AppendTo