JavaScript Objects Tutorial Videos for Beginner

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JavaScript Objects Tutorial Videos for
Beginner by
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Highlights

• JS Object Programming Introduction
• Built in or Native Objects

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JS Object Programming Introduction

• JavaScript supports object oriented programming.
• A programming technology will be called object
  oriented when ever it provides encapsulation,
  inheritance, polymorphism, aggregation.
• Encapsulation is meant for storing relevant data
  or methods collectively in an object.
• Aggregation means storing one object inside
  another object.
• Inheritance describes a class relying upon other
  class to acquire its properties and methods.
• Polymorphism means writing one function or method
  in various ways.

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Built in or Native Objects

• JavaScript is designed on a easy object base
  model. object is a set of properties. JavaScript
  offers various native objects, they are
• Number Object
• Boolean Object
• String Object
• Array Object
• Date Object
• Math Object
• Regular Expression Object

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Number Object

• Number object represents numerical values.
• It displays either integers or floating-point
  numbers.
• Syntax for creating a number object is
• var val new Number(number)
• Never place a non-number argument in the place
  of number because argument will not transform
  into a number.
• Every object will have default methods and some
  properties.

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Boolean Object

• The Boolean object displays either "true" or
  "false.
• Syntax var val new Boolean(value)
• If value omit 0, -0, null, false, NaN, undefined
  boolean objects display false in output. For
  all other values Boolean object shows true.
• Boolean.length, Boolean.prototype are the
  properties and Boolean.prototype.toSource(),
  Boolean.prototype.toString(), Boolean.prototype.va
  lueOf() are methods.

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String Object

•  String object acts as constructor for strings
• It combines string primitive data type with a
  number of methods.
• Syntax var val new String(string)
• String stores set of characters.
• Constructor, length, prototype are the string
  properties
• String has many methods, some of them are
  charAT(), charCodeAT(),concat(), indexof(),
  match(), replace(), search(), slice(), split()
  etc..

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Array Object

• Stores multiple values in a single variable.
• Stores similar elements of fixed-size at one
  place.
• Syntax var animals new Array( lion", tiger",
  bear" )
• Array parameter is a list of strings or integers.
• Constructor, length, prototype, index, input are
  array properties.
• concat(), filter(), every(), join(), indexof(),
  map() etc.. are some methods of array

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Date Object

• Useful to Create JavaScript Date instance to
  represent time.
•  new Date( ) function uses to create date
  objects.
• Syntax new Date( )
• new Date(year, month, date,
  hour,minute,second,millisecond )
• It has construct and prototype properties only.
• SetDate(), getYear(), Date(), getDate(),
  getDay(), getFullYear() etc.. are the methods of
  date object.

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Math Object

• Math is a built-in object.
• Includes various static methods and properties
  for mathematical constants and functions.
• Permits execution of mathematical tasks on
  numbers.
• Math is not a constructor so object can not be
  created.
• Syntax var mi_val Math.MI
• var cos_val Math.cos(30)

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Regular Expression Object

• Represents a sequence of symbols and characters
  expressing a string or pattern.
• performs "search-and-replace" functions on text.
• Syntax var pattern new RegExp(pattern,
  attributes)
• Or
• var pattern /pattern/attributes
• Constructor, global, ignoreCase, lastIndex,
  multiline, source are the properties

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