JavaScript - Void Operator: What's The Point?

i was using my JavaScript console as a calculator, and i accidentally used "^" for exponents.
the statement did not return a syntax error, but a number, after doing some more ^ operations i can't see the relation between the numbers i use and the answer it gives me.

Hello I have a question which has been bugging me for a while now so have decided to ask it on CF.

In PHP you can use the '&' symbol as a function operator for example like so.
PHP Code:
function demoFunc(&$output='') {
  for($i=1;$i<count(func_get_args());$i++) {
    $output .= ' '.func_get_arg($i);
  }
  $output = trim($output);
} 


As you can see the '&' symbol was used in the argument section to allow the function to be used like this demoFunc($output,'hello','world'); print $output;

My question is how can I do this in JavaScript to do the same thing like use the variable used in the function argument section and use it like it would be used in PHP?

Thank you
- DJCMBear

I'm trying to not allow my users to enter in n/a in my form ex... "N/A" "n/A" "na"

My code trips the alert every time no matter what is entered in the cell... Why is it doing that?

Code:

function appliance() {
if (document.ComplianceForm.Appliance.value=="n/a" || "N/A" || "n/A" || "N/a") {
alert("You cannot enter any variation of n/a in this cell.")
}
else {
return false;
}; 
	}

Hi folks,

Any suggestions on how you might achieve the following without using eval()? I've come up a bit short

Code:

function addOrSubtract(operator) {
    var a = 10;
    var b = 5;
    var answer = eval(a + operator + b);
    alert(answer); 
}
addOrSubtract('+') // alerts 15
addOrSubtract('-') // alerts 5

Would help me tidy up some code a lot thanks.

Code:

this.delete = function(obj)
{
..

Is that it ? I can't have delete ? Or can this be written in some other way, including delete ?

I'm still learning js core using Flanagan's 5th ed.
so please bear with me; is the if ("ignore" in arguments.callee) return;
below valid or a typeo?
Thanks J.
Code:

function inspect(inspector, title) {
    var expression, result;

    // You can use a breakpoint to turn off subsequent breakpoints by
    // creating a property named "ignore" on this function.
    if ("ignore" in arguments.callee) return;
.......

If number is more than 24 digits, modulus operator is not giving correct output
here attached sample code
[code]<script type="text/javascript">
var a=10000000000000000000000.0;
var b=10.0;
var c=a % b;
alert("c"+c);
</script>[code]

please tel me solution

anotherVar should be -1 if there are no matches, but it doesn't seem to work PHP Code:
var string = "abadafa";
var matches = string.match(/a/gi); //doesn't work with /z/ for example

var anotherVar = matches.length || -1; 


The default operator should return the second value if the first is null or false, and according to PHP Code:
try {
    alert(matches.length);
}
catch (e){
    alert(e); //alerts null
} 


it's null.

fyi: http://helephant.com/2008/12/javascr...ault-operator/

What's going on?

this is my javascript code:
Code:

var aaa, aab;
aaa = choo.chooserver0.checked;
aab = choo.chooserver1.checked;
k=(aaa==true)?0:(aab==true)?1:(aaa=true&&aab==true)? 'b2' : false ;

now when the checkbox with id chooserver0 is checked, it sets k's value to 0, and when checkbox with id chooserver1 is checked it sets its value to 1, but when both are checked it must set value to b2, but it sets value to 0, why?

and when i write it as:

Code:

var aaa, aab;
aaa = choo.chooserver0.checked;
aab = choo.chooserver1.checked;
k=(aaa=true&&aab==true)? 'b2' :(aaa==true)?0:(aab==true)?1: false ;

when box 1 is checked, it sets k= false, when box2 is checked it sets k= 'b2' and when both are checked it sets k = 'b2'... why is code doing so?

Hi im wanting to know how does the computer know whos scored more in a game?

Thanks,

Paul

I am well versed in ActionScript and I have done a lot of this already in As3.0 using XML Node Object. However my client wants this application to be more friendly with iphones/ipads. So we are going to have to restart this and go with Javascript which we know very little about.

Basically the internet application is going to be a 'Build your own Itinerary' for a huge rock event, where we have to sort each band selected by the user based on [Date:4th or 5th of July] and [Time Playing]. Those are the only two nodes we need to check, the [date] is obviously going to split it into two groups, and the [Time] is when the band is playing in that group and there will need to be an if/then to check for conflicts. other nodes like [Name] would be used to just add each of the bands selected to that list with .append() I guess. And [Stage] is a somewhat irrelevant node stored and displayed with each item.

So. In the professional opinion of those on this board... Where is a good place for a group of 'AS3.0 wise guy hacks' to start cracking at this with JavaScript? What would you suggest for rookies like us making an emergency jump to HTML/Javascript?

Thanks so much in advance for the assistance.

Hello

I need to do a portfolio of paintings and i found a site similar of what i have in mind.

The site is http://www.pikaboo.be/

It's great because its using javascript only.
I just don't know how to start my reserach for that transitions and moving objects and that stuff

Anyone can give me a few tips on how to start?
I have been looking at jquery and mootools it does some stuff taht it's on this site but the movement of objects and the way as they appear on the screen one by one and all that pretty stuff i have no idea how to search.

Anyone can help me on where to start and how to do something like this?

THank you

Hello all,

How to set decimal point in javascript ?
e.g.

var num1=23.12345;

I want output as 23.12

How can i do this ?

Please, guide me.

Thanks

Hey,

I was wondering if it is possible to make an image change whenever an anchorpoint on my page reaches the center or the side of the screen...

Thanks for your help!

ok i need a bit of advice..

I have a webpage and i want to put a section of another website on to my own website..

i have a www.bebo.com profile and i only want to show the comment section on my website..

my profile is www.bebo.com/thegaadiscos

is there a way to only show the comments div of the bebo site on my own website?

What i want is a bit like the face book section of this website
http://www.alexandraburkeofficial.com/

How would this be done does anyone know..