Update for 18-11-21 21:15

lang/Node.js.wiki

@@ -4,3 +4,52 @@ Node.js is an Asynchronus, event driven javascript runtime. On line the command
 is `node`.
 
 == Hello World ==
+
+1) Create a file called `index.js`. This is always the entry point (similar to
+   a main()).
+2) Place code. It is interpreted the same as if it were in the browser. For
+   example, 
+   {{{
+       console.log("hello world")
+    }}}
+   
+== Events ==
+
+Events are times when certain things happen. We can do things on those events
+by using a callback. This is accessed via the process object. For example,
+
+{{{
+    process.on('exit', function() {
+        Console.log("Goodbye!");
+            });
+  }}}
+  
+Will print goodbye to the console when the program terminates. process.on takes
+two paramaters, the event name '`exit`', and the function (or lambda).
+
+To create an event, we can use the Event Emitter, a node.js builtin. The
+following example is an annotated example of exactly that.
+
+{{{
+//pull in the event emitter dependency
+const { EventEmitter } = require('events');
+
+//create the event emitter
+const eventEmitter = new EventEmitter();
+
+//create the callback 'lunch'
+eventEmitter.on('lunch', function() {
+    console.log("Lunch time");
+        });
+        
+//trigger the callback function
+eventEmitter.emit('lunch');
+  }}}
+  
+As you can see, this is a similar concept to something like function pointers,
+where a pointer is assigned then later called through the pointer.
+
+== File system ==
+
+The file system can be read in two modes, either in a block or non blocking
+mode (similar to async calls in C#)