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Re: more elements in a list


"merkat" <cabanc at hotmail.com> wrote in message
news:a1gv6a$n6n$1 at smc.vnet.net...
> Hi ,
>
> How do I multiply the number of elements in a list?
> I have the lists:
> {a,b,c}  and
> {2,5,4}
>
> the result should be:
> {a,a,b,b,b,b,b,c,c,c,c}
>
> Merkat

In[20]:=
s = {a, b, c}; x = {2, 5, 4};
sam[{a_, b_}] := PadRight[ {a}, b, a]
Flatten[Map[sam, Thread[{s, x}]]]


Out[22]=
{a, a, b, b, b, b, b, c, c, c, c}

Howard Fink



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