Re: Debracketing array symbols
- To: mathgroup at smc.vnet.net
- Subject: [mg92159] Re: Debracketing array symbols
- From: carlos at Colorado.EDU
- Date: Mon, 22 Sep 2008 05:25:12 -0400 (EDT)
- References: <gb2e6u$bp0$1@smc.vnet.net>
> deBracket[x_] :=
> x /. A_Symbol[n__Integer] :>
> ToExpression[
> StringJoin[Prepend[ToString /@ {n}, ToString[A]]]]
>
> X[1] // deBracket
>
> X1
>
> {A[1], A[2], A[3], A[4]} // deBracket
Elegant.
A related question A={A[1], A[2], A[3], A[4]} produces infinite
recursion in 4.2 and 5.2 (NB - I prepare all coursework with
4.2 for compatibility with some remote students in industry)
Is the symbol A used on the RHS?
{A[1], A[2], A[3], A[4]} //FullForm just shows
List[A[1],A[2],A[3],A[4]] which does not tell me much.
Where is the role of A in the RHS explained in the documentation?.