# some array functions # return whether $1 equals one of the remaining arguments function IsInArray() { { local needle="$1" test -z "$needle" && return 1 while shift ; do # at the end $1 becomes an unbound variable (after all arguments were shifted) # so that an empty default value is used to avoid 'set -eu' error exit # and that empty default value cannot match because needle is non-empty: test "$needle" == "${1:-}" && return 0 done } 2>>/dev/$DISPENSABLE_OUTPUT_DEV return 1 } function RmInArray() { # "$1" string to be removed in array "${2[@]}" # please note that the array elements are a bunch of words in this function # usage: BACKUP_RSYNC_OPTIONS=( $( RmInArray "--relative" "${BACKUP_RSYNC_OPTIONS[@]}" ) ) { local needle="$1" declare -a nArray # we will build a new array while shift ; do if [[ "$needle" != "$1" ]] ; then nArray+=( "$1" ) fi done } 2>>/dev/$DISPENSABLE_OUTPUT_DEV # we return the array as a string echo "${nArray[@]}" }