create an example nix file to help understand how nix works

Author: themarkness

something.nix

@@ -0,0 +1,46 @@
+# example.nix
+# This is a simple example Nix file demonstrating basic Nix concepts
+
+# Define some variables
+let
+  # Basic variable assignment
+  greeting = "Hello, Nix!";
+  
+  # List of numbers
+  numbers = [ 1 2 3 4 5 ];
+  
+  # Attribute set (similar to a dictionary/object)
+  config = {
+    name = "example";
+    version = "1.0.0";
+    dependencies = [ "nix" "nixpkgs" ];
+  };
+  
+  # Function definition
+  add = a: b: a + b;
+in
+  # The main expression that gets evaluated
+  {
+    # Basic string
+    message = greeting;
+    
+    # Using the function
+    sum = add 5 3;
+    
+    # List operations
+    firstNumber = builtins.head numbers;
+    allNumbers = numbers;
+    
+    # Accessing attribute set
+    projectName = config.name;
+    projectVersion = config.version;
+    
+    # Using built-in functions
+    currentTime = builtins.currentTime;
+    
+    # Conditional expression
+    isEven = if builtins.mod 4 2 == 0 then true else false;
+    
+    # List transformation using builtins.map
+    doubledNumbers = builtins.map (x: x * 2) numbers;
+  }