javascript_tutorial

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Javascript Its syntax is as follows: Array.push(); Parameter Details element1, ..., elementN: The elements to add to the end of the array. Return Value Returns the length of the new array. Example Try the following example. JavaScript Array push Method var numbers = new Array(1, 4, 9); var length = numbers.push(10); document.write("new numbers is : " + numbers ); length = numbers.push(20); document.write("new numbers is : " + numbers ); Output new numbers is : 1,4,9,10 new numbers is : 1,4,9,10,20 202
Javascript reduce () Javascript array reduce() method applies a function simultaneously against two values of the array (from left-to-right) as to reduce it to a single value. Syntax Its syntax is as follows: array.reduce(callback[, initialValue]); Parameter Details callback : Function to execute on each value in the array. initialValue : Object to use as the first argument to the first call of the callback. Return Value Returns the reduced single value of the array. Compatibility This method is a JavaScript extension to the ECMA-262 standard; as such it may not be present in other implementations of the standard. To make it work, you need to add the following code at the top of your script. if (!Array.prototype.reduce) { Array.prototype.reduce = function(fun /*, initial*/) { var len = this.length; if (typeof fun != "function") throw new TypeError(); // no value to return if no initial value and an empty array if (len == 0 && arguments.length == 1) throw new TypeError(); var i = 0; if (arguments.length >= 2) { 203
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About the Tutorial JavaScript is a
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Bitwise Operators .................
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23. String ........................
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setUTCDate () .....................
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Checking for Plug-Ins .............
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1. OVERVIEW Javascript What is Java
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Javascript components, integrates w
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Javascript This function can be use
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Javascript The following example sh
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Javascript JavaScript in Chrome Her
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4. PLACEMENT Javascript There is a
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Javascript This code will
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5. VARIABLES Javascript JavaScript
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Javascript Within the body of a fun
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6. OPERATORS Javascript What is an
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Javascript document.write("a - b =
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Javascript the right operand, if ye
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Javascript Output (a == b) => false
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Javascript Output (a && b) => fal
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Javascript document.write("(a | b)
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Javascript Ex: C /= A is equivalent
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Javascript Set the variables to dif
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Javascript Function Undefined Null
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7. IF-ELSE Javascript While writing
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Javascript Output Qualifies for dri
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Javascript Try the following code t
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Javascript Syntax The objective of
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Javascript switch (grade) { case 'A
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Javascript Syntax The syntax of whi
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Javascript do{ Statement(s) to be e
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10. FOR LOOP Javascript The for Loo
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Javascript Current Count : 6 Curren
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Javascript Set the variable to diff
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Javascript Set the variable to
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Javascript Entering the loop 2 3 4
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Javascript Output Entering th
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13. FUNCTIONS Javascript A function
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Javascript Click the following butt
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Javascript Click the following but
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Javascript Use different parameters
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Javascript var variablename = funct
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14. EVENTS Javascript What is an Ev
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Javascript ....... onmouseove
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Javascript ondragenter script Trigg
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Javascript onplaying script Trigger
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15. COOKIES Javascript What are Coo
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Javascript Enter name: Outp
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Javascript Setting Cookies Expiry D
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Javascript Output Enter Cookie Na
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Javascript Example Try the followin
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Javascript setTimeout('Redirect()',
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17. DIALOG BOX Javascript JavaScrip
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Javascript Output Click the fol
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18. VOID KEYWORD Javascript void is
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Javascript Click the followin
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Javascript 2. If you do not want to
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Javascript 104
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Javascript Methods are useful for e
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Javascript Output Book title is
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Javascript User-defined objects /
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Javascript In the following section
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Javascript Click the following t
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Javascript Day of the Month must be
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Javascript alert("Value of bigNumbe
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Javascript constructor It returns a
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Javascript Try the following exampl
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Javascript document.write(""); docu
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Javascript document.write("num.toPr
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Javascript Returns the primitive va
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Javascript Returns the function tha
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Javascript Method toSource() toStri
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Javascript Output flag.toString
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23. STRING Javascript The String ob
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Javascript concat() indexOf() lastI
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Javascript document.writeln("str.ch
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Javascript Argument Details string2
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Javascript lastIndexOf () This meth
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Javascript var index = str1.localeC
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Javascript substring. $n or $nn Whe
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Page 188 and 189: Javascript input length prototype T
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Page 196 and 197: Javascript } var passed = [12, 5, 8
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Page 200 and 201: Javascript } }; Example Try the fol
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Page 204 and 205: Javascript join () Javascript array
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Page 216 and 217: Javascript } } throw new TypeError(
Page 218 and 219: Javascript } rv = this[i--]; break;
Page 220 and 221: Javascript } rv = fun.call(null, rv
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Page 230 and 231: 25. DATE Javascript The Date object
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Page 234 and 235: Javascript Date Methods Here is a l
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Javascript setTime () Javascript da
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Javascript Date.setUTCFullYear(year
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Javascript document.write( dt );
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Javascript var dt = new Date(1993,
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Javascript toLocaleDateString () Ja
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Javascript Syntax Its syntax is as
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Javascript For instances of Date,
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Javascript var dateobject = new
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Javascript Output 743850547000 Date
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Javascript minutes : An integer
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Javascript In the following section
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Javascript Property Value is : 0.43
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Javascript JavaScript Math SQRT2 P
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Javascript First Test Value : 3.141
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Javascript JavaScript Math atan() M
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Javascript var value = Math.atan2(+
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Javascript Output First Test Value
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Javascript var value = Math.log(10
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Javascript min ( ) This method retu
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Javascript var value = Math.pow(7,
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Javascript Return Value Returns the
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Javascript Output First Test Val
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27. REGEXP Javascript A regular exp
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Javascript Examples Following examp
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Javascript m g Specifies that if th
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Javascript Test1 - ignoreCase prope
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Javascript if ( re.multiline ){ doc
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Javascript exec ( ) The exec method
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Javascript document.write("Test 2 -
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Javascript document.write("Test 1 -
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Javascript There are several DOMs i
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Javascript forms[ ] 9 An array of F
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Javascript Ex: document.close( ) op
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Javascript This is main title Click
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Javascript createElement( tagName)
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Javascript NOTE: This example r
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Javascript Specifies the loading st
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Javascript NOTE: This example
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Javascript Part 3: JavaScript Advan
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Javascript Logical Errors Logic err
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Javascript Now let us try to catch
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Javascript Output Click the followi
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Javascript Click the following to s
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30. FORM VALIDATION Javascript Form
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Javascript Basic Form Validation Fi
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Javascript var emailID = document.m
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Javascript Manual Animation So let'
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Javascript } function moveRight(){
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Javascript It is not possible to s
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Javascript Output Checking for Plug
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Javascript //--> If you
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Javascript Error Messages in Firefo
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Javascript Use a JavaScript Debugge
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34. IMAGE MAP Javascript You can us
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Javascript Output You can feel the
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Javascript 6 plugins[] This propert
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Javascript document.write(" Browser
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