[Bug 29353] Lossless map:merge


Michael Kay <mike@saxonica.com> changed:

           What    |Removed                     |Added
                 CC|                            |mike@saxonica.com

--- Comment #1 from Michael Kay <mike@saxonica.com> ---
Your desired function can be written

function f:merge-entries($m1, $m2) {
    for $k in distinct-values((map:keys($m1), map:keys($m2))
    return map{$k : ($m1($k), $m2($k))}

which doesn't feel inelegant to me, and if it's inefficient, that's an
implementation problem.

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Received on Thursday, 31 December 2015 08:22:52 UTC