[Main page] [Overview]     /efun /transpose_array

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SYNOPSIS
mixed *transpose_array (mixed *arr);

DESCRIPTION
transpose_array ( ({ ({1,2,3}), ({a,b,c}) }) )
== ({ ({1,a}), ({2,b}), ({3,c}) })

transpose_array() applied to an alist results in an array of
({ key, data }) pairs, useful if you want to use sort_array()
or filter() on the alist.

EXAMPLE
sort_array(transpose_array( ({ m_indices(map), m_values(map) }) ),
lambda( ({ 'a, 'b }),
({ #'<, ({ #'[, 'a, 0 }),
({ #'[, 'b, 0}) }) )

The given mapping 'map' is returned as an array of
({ key, data }) pairs, sorted by the keys.

SEE ALSO
alists(LPC), sort_array(E)