Re: Passing a list as seperate parameters?
- To: mathgroup at smc.vnet.net
- Subject: [mg73214] Re: Passing a list as seperate parameters?
- From: albert <awnl at arcor.de>
- Date: Thu, 8 Feb 2007 03:30:24 -0500 (EST)
- Organization: Arcor
- References: <eqc71p$qs7$1@smc.vnet.net>
Hi,
> As an example, I build up the list { {a,b},{c,d} }, and I want to find
> the union of it's elements.
>
> At first glance, I want Union. However, Union wants it's input as
> Union[{a,b},{c,d}], Union[{{a,b},{c,d}}] doesn't do anything.
>
> In general I get around this by fold, but it seems there should be a
> simpler method?
Does this what you want?
lst = {{a,b},{c,d}}
Union@@lst
@@ is a shortcut for Apply, which you can look up in the helpbrowser.
hth,
albert