Using sed to delete a case insensitive matched line - sed

Question

How do I match a case insensitive regex and delete it at the same time
I read that to get case insensitive matches, use the flag "i"
sed -e "/pattern/replace/i" filepath
and to delete use d
sed -e "/pattern/d" filepath
I've also read that I could combine multiple flags like 2iw
I'd like to know if sed could combine both i and d
I've tried the following but it didn't work
sed -e "/pattern/replace/id" filepath > newfilepath

Answer 1

For case-insensitive use /I instead of /i.
sed -e "/pattern/Id" filepath

Answer 2

you can use (g)awk as well.
# print case insensitive
awk 'BEGIN{IGNORECASE=1}/pattern/{print}' file
# replace with case insensitive
awk 'BEGIN{IGNORECASE=1}/pattern/{gsub(/pattern/,"replacement")}1' file
OR just with the shell(bash)
#!/bin/bash
shopt -s nocasematch
while read -r line
do
case "$line" in
*pattern* ) echo $line;
esac
done <"file"

Answer 3

I produced this one-liner because Ansible cannot handle different lv with the same name. This convert near CSV into perfect JSON. Possibly, you want to change the -F flag to change the field separator.
lvs | perl -ane '
local %tmp,$i=0;
while($i<#f){
$tmp{$f[$i]}=$F[$i] if $F[$i];
$i++
};
if(#f){push #ans,\%tmp}
else{ #f=#F };
END { print to_json(\#ans,{pretty=>1}) }
' -MJSON