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maildedupe-zsh/lacomp.zsh

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#!/bin/zsh
zmodload zsh/stat
function ctime {
zstat -F '%s' +ctime -- "$1"
}
function mdate {
local dfmt="$(grep -m 1 -oP '(?<=^[dD]ate\:\ ).*' $1)"
date '+%s' -d "$dfmt"
}
while read LINE; do
fls=(${(s. .)LINE})
unset cts
typeset -A cts
for i in $fls; do
cts[$i]=$(ctime "$i")
done
unset mds
typeset -A mds
for i in $fls; do
mds[$i]=$(mdate "$i")
done
while [ "${#fls}" -gt 1 ]; do
TMS=()
mf=""
if [ "${#mds}" -gt 1 ]; then
TMS=(${(nO)${(v)mds}})
mf="${(k)mds[(r)${TMS[1]}]}"
unset "mds[${(b)mf}]"
else
TMS=(${(nO)${(v)cts}})
mf="${(k)cts[(r)${TMS[1]}]}"
unset "cts[${(b)mf}]"
fi
fls=(${fls:#$mf})
echo "$mf"
done
done