It is a slice: "$a->(-1:0:-1)". From last element to first element,  
stepping by-1.

(Mobile)


On Oct 9, 2009, at 8:09 AM, Maggie Xiong <[email protected] 
 > wrote:

> Maybe I've missed the obvious--is there something similar to perl  
> reverse in PDL? It seems trivial but handy to have with qsort and  
> qsorti.
>
>
> Thanks,
> Maggie
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