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Re: ContainsQ ?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg72575] Re: [mg72563] ContainsQ ?
  • From: Carl Woll <carlw at wolfram.com>
  • Date: Wed, 10 Jan 2007 02:46:58 -0500 (EST)
  • References: <200701091229.HAA21425@smc.vnet.net>

Chris Chiasson wrote:

>Is there something like ContainsQ that means !FreeQ?
>
>  
>
There is MemberQ. It's not quite the opposite, because the default 
levels are different. Anyway,

MemberQ[list, form, {0, Infinity}]

is equivalent to

!FreeQ[list, form]

Similarly,

FreeQ[list, form, {1}]

and

!MemberQ[list, form]

are equivalent.

Carl Woll
Wolfram Research


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      • From: "Chris Chiasson" <chris@chiasson.name>
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