This document discusses strings and objects in JavaScript. It defines strings as text enclosed in double or single quotes. It also defines objects as collections of key-value pairs enclosed in curly braces. The document then lists common string and object methods like length, indexOf, split, contains for strings and accessing properties and methods for objects. It also covers the this keyword, scope, and differences between primitive and reference types in JavaScript.

1. Strings
and Objects

2. STRING

3. “...”

4. var str_var = “...”

5. str_var.length

6. startsWith(str)
&
endsWith (str)
&
indexOf (str, pos)
&
lastIndexOf (str, pos)
split(separator)
&
contains(str)
&
substr(start, len)
&
substring(start, end)

7. OBJECT

8. {}

9. var obj_var = {}

10. var obj_var = {
prop_name : “prop”,
method_name : function () {
// method name
}
}

11. obj_var. prop_name

12. obj_var[‘prop_name’]

13. obj_var. method_name()

14. obj_var[‘method_name’]()

15. this

16. var obj_var = {
prop_name : “prop”,
method_name : function () {
console.log( this.prop_name )
}
}

17. window

18. var prop_name = “data”;
var obj_var = {
prop_name : “prop”,
method_name : function () {
console.log(prop_name );
}
}

19. Primitive vs Reference Type

20. Data Wraper Utility
Object
Array
Function
Boolean
Number
String
Math
Date
RegExp