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gfldex/gist:ecde10b59aab332941a245dc4e74ddf0

Forked from dogbert17/gist:dcf078ff80c7b868dfdce95632b4ad63
Last active July 16, 2016 15:23
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gistfile1.txt
# function to be wrapped:
sub square-root($x) { $x.sqrt }
&square-root.wrap(sub ($num) {
nextsame if $num >= 0;
1i * callwith(abs($num));
});
say square-root(4); # 2
say square-root(-4); # 0+2i
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