JavaScript

1. Java Script Module 2. World Wide Web (WWW) 3. Web Terms 4. NEED FOR SCRIPT 5. Introduction to Internet Programming 6. CLIENT SIDE and SERVER SIDE Scripting 7. Different Scripting Languages 8. Introduction to JavaScript 9. JavaScript and Security 10. How to Enable JavaScript 11. Advantages of Java Script 12. Limitations with JavaScript 13. Difference between JavaScript and JAVA 14. Difference between JavaScript and VBScript 15. JavaScript Development Tools 16. JavaScript Programming Techniques 17. JavaScript terms 18. Starting with JavaScript Programming step by step 19. Time to start JavaScript Programming 20. JavaScript Variables 21. JavaScript RESERVED WORDS 22. JavaScript Data Type 23. NUMBER DATA TYPE 24. BOOLEAN DATA TYPE 25. STRING DATA TYPE 26. NULL DATA TYPE 27. JavaScript Undefined DATA TYPE 28. JavaScript Operators 29. JavaScript Arithmetic Operators 30. JavaScript Logical Operators 31. JavaScript Comparison Operators 32. JavaScript String Operators 33. Bit Manipulation Operators 34. JavaScript Assignment Operators 35. JavaScript Conditional Operator 36. Conversion between JavaScript Data Types 37. Alert JavaScript function 38. confirm JavaScript function 39. prompt JavaScript function 40. JavaScript Statements 41. Single line & Multi-line Comments 42. JavaScrip If Statement 43. JavaScript if..else Statements 44. JavaScript If…else..if statement. 45. JavaScript For Statement 46. JavaScript For..in Statement: 47. JavaScript While Statement 48. JavaScript do while Statement: 49. JavaScript break and continue statement 50. JavaScript switch Statement: 51. JavaScript function() 52. JavaScript function with a Return Value 53. JavaScript with Statement 54. try, catch, and throw Statements 55. JavaScript ARRAY 56. JavaScript array of different data types 57. JavaScript ARRAY and Bubble sorting Program 58. JavaScript Array Methods 59. concate() method 60. every() method 61. filter() method 62. forEach() method 63. indexOf() method 64. Join() method 65. lastIndexOf() method 66. map() method 67. reduce() method 68. reduceRight() method 69. reverse() method 70. some() method 71. toSource() method 72. toString() method 73. pop() method 74. push() method 75. shift () method 76. slice () method 77. splice () method 78. sort() method 79. unshift() method 80. EVENT handling with JavaScript 81. onblur JavaScript Event 82. onchange JavaScript Event 83. onclick JavaScript Event 84. onDblClick JavaScript Event 85. onfocus JavaScript Event 86. onkeydown JavaScript Event 87. onkeyup JavaScript Event 88. Onkeypress JavaScript Event 89. onLoad JavaScript Event 90. onMousedown JavaScript Event 91. onMouseup JavaScript Event 92. Onmouseover JavaScript Event 93. onmouseout JavaScript Event 94. onMouseMove JavaScript Event 95. onReset JavaScript Event 96. onsubmit JavaScript Event 97. onUnload JavaScript Event 98. The Screen Object 99. JavaScript Interview Part1 100. JavaScript Interview Part2 101. JavaScript Interview Part3 102. JavaScript Interview Part4 103. JavaScript Interview Part5 104. JavaScript Interview Part6 105. JavaScript Interview Part7 106. JavaScript Interview Part8 107. JavaScript Interview Part9 108. JavaScript Interview Part10
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Working with JavaScript ARRAY tutorials

  • A normal Variable store only one value.

  • Where is Array helps to store several value of same data type under single variable name.

  • An array is a variable that can store many values within it. Many programmers have seen arrays in other languages, and they aren't that different in JavaScript.

  • An array is a set of related data items i.e. all of them belong to the same data type and can be accessed by a common name.

  • Instead of declaring 10 individual variabls such as int no0,no1,no2,no3…. no9; we can simply say var no=new Array(10);

  • This is an example of an array of ten block, the name of the array variable is no and the size is ten.

  • Each element of an array is stored in adjacent locations of the memory.

  • The lowest address corresponds to the first element and the highest address of array will be last element.

  • Array can be Single Dimensional or Double Dimensional

 

Declaring Array

 

var myArray = new Array();

myArray[0] = new Array( ); // Single Dimensional Array var

myArray[0][0] = new Array( ); // Double Dimensional Array var

myArray[0][0][0]= new Array( ); // Three Dimensional Array var

For example

var no=new Array(10);

javascript declairing array

 

no[0] refers to the first element in the array.

no[1] refers to the second element in the array.

no[9] refers to the last element in the array.

 

Array initialization

  • All elements in an array variable cannot be initialized automatically.

  • Each element of an array has to be initialized seperately, either in the declaration statement or using loop.

var no=new Array();

no[0]="Football";

no[1]="Cricket";

no[2]="Tennis";

no[3]="Chess";

or

var no = new Array("Football","Cricket","Tennis","Chess");

 

Example: Example: the following example shows the use of Array in javascript.
Output:

Football Cricket Tennis Chess

 

  • From the above example, we have create a simple array "no".that stores the values like Football, Cricket, Tennis and Chess. Document.write statements print output of the access values.

 

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