objects md file

Author: Rebecca Murphey

content/javascript-101/objects.md

@@ -0,0 +1,46 @@
+---
+chapter :     js101
+section:      7
+title:        Objects
+attribution:  jQuery Fundamentals
+---
+
+Objects contain one or more key-value pairs. The key portion can be any string.
+The value portion can be any type of value: a number, a string, an array, a
+function, or even another object.  When one of these values is a function, it’s
+called a method of the object. Otherwise, they are called properties.
+
+As it turns out, nearly everything in JavaScript is an object -- arrays,
+functions, numbers, even strings -- and they all have properties and methods.
+
+<div class="example" markdown="1">
+Creating an "object literal"
+
+    var myObject = {
+      sayHello : function() {
+          console.log('hello');
+      },
+
+      myName : 'Rebecca'
+    };
+
+    myObject.sayHello();            // logs 'hello'
+    console.log(myObject.myName);   // logs 'Rebecca'
+</div>
+
+<div class="note" markdown="1">
+## Note
+
+When creating object literals, you should note that the key portion of each
+key-value pair can be written as any valid JavaScript identifier, a string
+(wrapped in quotes) or a number:
+
+    var myObject = {
+      validIdentifier : 123,
+      'some string' : 456,
+      99999 : 789
+    };
+
+Object literals can be extremely useful for code organization; for more
+information, read Using Objects to Organize Your Code by Rebecca Murphey.
+</div>