Currently I have a sorted output of numbers from a command:
18,19,62,161,162,163,165
I would like to condense these number lists
Only with a function in bash:
#!/bin/bash
list2range() {
set -- ${@//,/ } # convert string to parameters
local first a b string IFS
local -a array
local endofrange=0
while [[ $# -ge 1 ]]; do
a=$1; shift; b=$1
if [[ $a+1 -eq $b ]]; then
if [[ $endofrange -eq 0 ]]; then
first=$a
endofrange=1
fi
else
if [[ $endofrange -eq 1 ]]; then
array+=($first-$a)
else
array+=($a)
fi
endofrange=0
fi
done
IFS=","; echo "${array[*]}"
}
list2range 18,19,62,161,162,163,165
Output:
18-19,62,161-163,165