added pure sh arrays example

content/posts/2024/bash/password-generator.md

@@ -2,7 +2,7 @@
 title: "🔑 Генератор паролей в виде однострочника на Bash"
 date: 2024-08-17T22:33:12+03:00
 draft: false
-tags: [linux, tips, security]
+tags: [shell, linux, tips, security]
 ---
 
 Пост [Cyrus](https://stackoverflow.com/a/44377013) на **SoF**.

content/posts/2024/shell/pure-sh-array.md

@@ -0,0 +1,25 @@
+---
+title: "✴️ Массивы на числом Shell"
+date: 2024-12-02T11:42:09+03:00
+draft: false
+tags: [shell, linux, tips, development]
+---
+
+```sh
+#!/bin/sh
+
+IFS='|'
+STROKE='Firebrick|SeaGreen|Sienna|Blue|Purple|Tomato'
+set -f
+
+getNth()  { shift "$(( $1 + 1 ))"; printf '%s\n' "$1"; }
+getLast() { getNth "$(( $(length "$@") - 1 ))" "$@"; }
+length()  { echo "$#"; }
+
+INDEX=0
+while [ $INDEX -le $(expr $(length $STROKE) - 1) ]; do
+    echo $(getNth $INDEX $STROKE)
+
+    INDEX=$(expr $INDEX + 1)
+done
+```