From b8fbf31ab5f401ed6ea24fadf6159557c2924921 Mon Sep 17 00:00:00 2001
From: NotTheDr01ds <32344964+NotTheDr01ds@users.noreply.github.com>
Date: Tue, 8 Apr 2025 15:58:33 -0400
Subject: [PATCH 1/2] Added some language comparisons

---
 book/special_variables.md | 111 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)

diff --git a/book/special_variables.md b/book/special_variables.md
index cd8c460baff..a4e2abfa571 100644
--- a/book/special_variables.md
+++ b/book/special_variables.md
@@ -47,6 +47,54 @@ The `$nu` constant is a record containing several useful values:
 
 `$env` is a special mutable variable containing the current environment variables. As with any process, the initial environment is inherited from the parent process which started `nu`.
 
+::: details **_Comparison with other languages:_**
+
+::: tabs
+@tab Nu
+
+```nu
+# Set an environment variable
+$env.VARNAME = "Content"
+
+# Access an environment variable
+$env.VARNAME
+# => Content
+
+# View all environment variables
+$env
+```
+
+@tab Bash/POSIX
+
+````bash:no-line-numbers
+# Set an environment variable
+VARNAME="Content"
+export VARNAME
+# or
+export VARNAME="Content"
+
+# Access an environment variable
+echo $VARNAME
+# => Content
+
+# View all environment variables
+env
+
+@tab PowerShell
+
+```powershell
+# Set an environment variable
+$env:VARNAME = "Content"
+
+# Access an environment variable
+$env:VARNAME
+# => Content
+````
+
+<!-- Please add additional languages -->
+
+:::
+
 There are also several environment variables that Nushell uses for specific purposes:
 
 ### `$env.config`
@@ -81,6 +129,40 @@ try {
 # => 2
 ```
 
+::: details **_Comparison with other languages:_**
+
+::: tabs
+
+@tab Nu
+
+```nu
+$env.LAST_EXIT_CODE
+```
+
+@tab Bash/POSIX
+
+```bash
+$?
+```
+
+@tab PowerShell
+
+```powershell
+# Code
+$LASTEXITCODE
+
+# Successful - true or false
+$?
+```
+
+@tab Perl
+
+```perl
+$? >> 8
+```
+
+:::
+
 ### `env.CMD_DURATION_MS`
 
 The amount of time in milliseconds that the previous command took to run.
@@ -103,6 +185,18 @@ the file resides. Note that this value is also available as a constant through:
 path self | path dirname
 ```
 
+::: details **_Comparison with other languages:_**
+
+::: tabs
+
+@tab PowerShell
+
+```powershell
+$PSCommandPath
+```
+
+:::
+
 ### `$env.PROCESS_PATH`
 
 When _executing a script_, this variable represents the name and relative path of the script. Unlike the two variables
@@ -110,6 +204,23 @@ above, it is not present when sourcing a file or importing a module.
 
 Note: Also unlike the two variables above, the exact path (including symlinks) that was used to _invoke_ the file is returned.
 
+::: details **_Comparison with other languages:_**
+
+::: tabs
+@tab Nushell
+
+```nu
+print $env.PROCESS_PATH
+```
+
+@tab Bash
+
+```bash
+echo $0
+```
+
+:::
+
 ### `$env.NU_LIB_DIRS`
 
 A list of directories which will be searched when using the `source`, `use`, or `overlay use` commands. See also:

From 10af72c7d0201f234374c9b2d9cd4e070ae4a85f Mon Sep 17 00:00:00 2001
From: NotTheDr01ds <32344964+NotTheDr01ds@users.noreply.github.com>
Date: Tue, 8 Apr 2025 16:07:38 -0400
Subject: [PATCH 2/2] Changed from dropdown details to embedded tip

---
 book/special_variables.md | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/book/special_variables.md b/book/special_variables.md
index a4e2abfa571..d740f249a09 100644
--- a/book/special_variables.md
+++ b/book/special_variables.md
@@ -47,7 +47,7 @@ The `$nu` constant is a record containing several useful values:
 
 `$env` is a special mutable variable containing the current environment variables. As with any process, the initial environment is inherited from the parent process which started `nu`.
 
-::: details **_Comparison with other languages:_**
+::: tip In other shells and languages ...
 
 ::: tabs
 @tab Nu
@@ -129,7 +129,7 @@ try {
 # => 2
 ```
 
-::: details **_Comparison with other languages:_**
+::: tip In other shells and languages ...
 
 ::: tabs
 
@@ -185,10 +185,16 @@ the file resides. Note that this value is also available as a constant through:
 path self | path dirname
 ```
 
-::: details **_Comparison with other languages:_**
+::: tip In other shells and languages ...
 
 ::: tabs
 
+@tab Nu
+
+```nu
+$env.FILE_PWD
+```
+
 @tab PowerShell
 
 ```powershell
@@ -204,7 +210,7 @@ above, it is not present when sourcing a file or importing a module.
 
 Note: Also unlike the two variables above, the exact path (including symlinks) that was used to _invoke_ the file is returned.
 
-::: details **_Comparison with other languages:_**
+::: tip In other shells and languages ...
 
 ::: tabs
 @tab Nushell