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JavaScript:Tutorial, Using Arrays

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Started by TcM, Dec 03 2006 07:52 AM

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25 replies to this topic

#1
TcM
Posted 03 December 2006 - 07:52 AM

TcM

    Writes binary right handed and hex left handed

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Introduction:-
Usually this is a difficult thing when it comes to programming and usually people get mixed up with arrays.

Solution:-
Make this Function between the <head> tags:-

<SCRIPT language="JavaScript">

function array_use()
{

var msg= new Array(8)
msg[0]="Msg1";
msg[1]="Msg2";
msg[2]="Msg3";
msg[3]="Msg4";
msg[4]="Msg5";
msg[5]="Msg6";
msg[6]="Msg7";
msg[7]="Msg8";

var i=0;



for (i=0; i<8; i++)

  {
     alert(msg[i]);
  }

}

</SCRIPT>
Instead of

var msg= new Array(8)
msg[0]="Msg1";
msg[1]="Msg2";
msg[2]="Msg3";
msg[3]="Msg4";
msg[4]="Msg5";
msg[5]="Msg6";
msg[6]="Msg7";
msg[7]="Msg8";

You can make (Untested)

var msg = new Array("msg1","msg2","msg3","msg4","msg5","msg6","msg7","msg8");


And call it with something like this:-
<BODY onLoad="array_use()">

Explanation:-
for (i=0; i<8; i++)

  {
     alert(msg[i]);
  }
This is a Loop that will display a msg and increase i by one every time and it will go on until i<8

A Preview:-
Posted Image

Conclusion:-
As Always Feedback is welcome and the full source is attached!!

Attached Files


Edited by TcM, 26 June 2008 - 10:30 AM.

#2
RikkoSuperb
Posted 23 August 2007 - 06:03 AM

RikkoSuperb

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What else can you do with arrays? I have used them in coursework but the examples are lame - like amount of books borrowed from a library that are printed to the document for the user to view. wow. ground breaking stuff? methinks not.
RikkoSuperb

#3
Rohit
Posted 24 June 2008 - 10:34 PM

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Thanks to share this information,good information about how we can use array in <head> tag
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#4
TcM
Posted 25 June 2008 - 12:02 AM

TcM

    Writes binary right handed and hex left handed

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Welcome.

Thanks for positive comment.

#5
Xav
Posted 25 June 2008 - 12:18 PM

Xav

    Writes binary right handed and hex left handed

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Your code isn't particularly efficient. A shorter way to declare an array like that:
[HIGHLIGHT=javascript]
var msg = new Array("msg1","msg2","msg3","msg4","msg5","msg6","msg7","msg8");
[/HIGHLIGHT]
Jordan said:

Good members, like yourself, stick around and post for ages to come!
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#6
TcM
Posted 25 June 2008 - 01:22 PM

TcM

    Writes binary right handed and hex left handed

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These tutorials are not about efficiency, but about getting the basic thing and the concept of it into the readers mind.

#7
Xav
Posted 26 June 2008 - 08:08 AM

Xav

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I'm just saying, it's an awful lot of code there, which could easily be simplified.
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#8
TcM
Posted 26 June 2008 - 09:33 AM

TcM

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Yeah, but makes it harder for someone trying to learn the concept of Arrays.

#9
Xav
Posted 26 June 2008 - 09:34 AM

Xav

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I can't see how it is harder - if anything it's easier, because you don't need to concern yourself with array indices - simply define the elements.
Jordan said:

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#10
TcM
Posted 26 June 2008 - 09:37 AM

TcM

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But as Arrays start with 0 and not with 1, if you don't make those indices, they might get confused. And they will not understand the concept of 

alert(msg[i]);

#11
Xav
Posted 26 June 2008 - 09:43 AM

Xav

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Yeah, but it would be good to include both methods, to show people the different methods of doing it.
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#12
TcM
Posted 26 June 2008 - 10:29 AM

TcM

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Ok. I edited the first post, and added your code.
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