Writing element number into element, of array

Writing element number into element, of array

[Sebastian Gniazdowski]

Hello,

# line=0
# arr=(  "a"  "ba"  "x-LINE-x"  "dcba"  )
# echo ${arr[@]//(#b)(((*)-LINE-(*))|(*))/$match[3]$(( mend[2] != -1 ?
++ line : ( ++line, 0 ) ))$match[4]$match[5]}

$mend[2] is: ((*)-LINE-(*))
$match[3] is: first (*)
$match[4] is: second (*)
$match[5] is: |(*)

result:

0a 0ba x3x 0dcba

So this is quite close, "3" is written onto -LINE-, but I cannot get rid
of the "0". How can this be done?

-- 
  Sebastian Gniazdowski
  psprint3@fastmail.com

Re: Writing element number into element, of array

[Daniel Shahaf]

Sebastian Gniazdowski wrote on Mon, Mar 06, 2017 at 07:07:38 -0800:
> # echo ${arr[@]//(#b)(((*)-LINE-(*))|(*))/$match[3]$(( mend[2] != -1 ?  ++ line : ( ++line, 0 ) ))$match[4]$match[5]}

You could probably slap a ${foo:/0/} around the $((…)) (see
${name:/pattern/repl} in zshexpn(1)), but personally, I wouldn't write
it as a one-liner in the first place, for readability.