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What is the difference between Object Literals and Array Literals in JavaScript? I know it has something to do with the length method but i don't fully understand it.
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Objects created using object literal are singletons, this means when a change is made to the object, it affects the object entire the script. Whereas if an object is created using constructor function and a change is made to it, that change won't affect the object throughout the script.
Declaring methods and properties using Object Literal syntax The Object literal notation is basically an array of key:value pairs, with a colon separating the keys and values, and a comma after every key:value pair, except for the last, just like a regular array.
The object literal is a short form of creating an object. Define an object in the { } brackets with key:value pairs separated by a comma. The key would be the name of the property and the value will be a literal value or a function.
Object Property Initializer Before ES6, the object literal is a collection of name-value pairs. For example, In ES5. function user(name, division) { return {
Mozilla.org has very good explanation of the different literals with examples.
Array Literals
An array literal is a list of zero or more expressions, each of which represents an array element, enclosed in square brackets ([]). When you create an array using an array literal, it is initialized with the specified values as its elements, and its length is set to the number of arguments specified.
Object Literals
An object literal is a list of zero or more pairs of property names and associated values of an object, enclosed in curly braces ({}). You should not use an object literal at the beginning of a statement. This will lead to an error or not behave as you expect, because the { will be interpreted as the beginning of a block.
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