From 55009f1da9d6b25d0260104ec8bb16db95d6446e Mon Sep 17 00:00:00 2001
From: Lucas Larson <91468+LucasLarson@users.noreply.github.com>
Date: Sun, 8 May 2022 15:26:24 -0400
Subject: [PATCH] return the last argument passed to a function without
 resorting to bash

---
 SC3057.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/SC3057.md b/SC3057.md
index ee289d3..b34967f 100644
--- a/SC3057.md
+++ b/SC3057.md
@@ -18,6 +18,16 @@ Either switch to a shell that does support string indexing via parameter expansi
 echo "Your initial is $(printf '%s' "$USER" | cut -c 1)"
 ```
 
+To find the last argument passed to a shell script without using bash’s `${@:$#}`- or `${@: -1}`-style string indexing, use the following, which even “[works in the unix v7 bourne shell from 1979](https://stackoverflow.com/q/1853946#comment104235724_1853993)”:
+
+```sh
+#!/bin/sh
+for argument in "$@"; do
+  : # `:`, also called as `true`, is a no-op here
+done
+printf '%s\n' "${argument-}"
+```
+
 ### Rationale:
 
 String indexing is a bash and ksh extension, and does not work in `dash` or POSIX `sh`.
@@ -31,5 +41,6 @@ You can use `# shellcheck disable=SC3000-SC4000` to ignore all such compatibilit
 warnings.
 
 ### Related resources:
+[^1]: 
 
 * Help by adding links to BashFAQ, StackOverflow, man pages, POSIX, etc!