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Can arrays in Javascript contain functions

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posted 16 years ago

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Hi all
I want to know can arrays in java script contain functions. And if yes then can that array have normal variables as their members.
Actually I am developing an application where I am using a third party webservice. Using the key I have got , I am calling a function which needs a js array as parameter. This array should contain normal variables as well as functions. When I try to this I am getting javascript error array[i][0] not a function. Actually my third array element is a function.

Bear Bibeault

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posted 16 years ago

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Originally posted by Aniket Kedari:
I want to know can arrays in java script contain functions.

Yes. In JavaScript functions are first class objects and can be referenced like any other type -- including within arrays.

And if yes then can that array have normal variables as their members.

Yes. Arrays in JavaScript can be heterogenous. Each element can be any valid JavaScript type.

When I try to this I am getting javascript error array[i][0] not a function. Actually my third array element is a function.

Then would not the reference be array[2]? Why are you using a doubly-subscripted array reference?

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Aniket Kedari

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hen would not the reference be array[2]? Why are you using a doubly-subscripted array reference?

-> Actually I am using a two dimensional array. I am populating it in a for loop. Each row has 4 columns. first two and last are normal values and third one is function.

Bear Bibeault

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posted 16 years ago

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Well, then we'll obviously need more info to try and diagnose the problem. If the reference at array[i][0] is actually a function, there's no reason it can't be called or otherwise referenced.

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Aniket Kedari

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posted 16 years ago

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One more thing to add the function I am adding is like a nested one.
ex array[i][2] = function(abc){
stat1...
};

Aniket Kedari

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posted 16 years ago

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javaranch.com is not accepting my code because of < tag.
I rtied to replace manuallly it with & lt; but doesn`t work.
Can anybody help me please

Bear Bibeault

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First pare your code down to the smallest snippets that demonstrate the problem, Pasting in whole pages is usually not helpful. Angle brackets are usually not the problem. Phrases such as onclick and eval() are usually what blocks submission.

The FAQ for this forum also has a link to a handy tool that could help you post the code.

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Aniket Kedari

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Hi Bear Bibeault
Above two posts contain my entire program.
Please try to append and run it in IE.

Bear Bibeault

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posted 16 years ago

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Please be sure to use UBB code tags when posting code to the forums. Unformatted code is extremely hard to read and many people will simply not look at it. Please read this for more information.

You can go back and change your post to add code tags by clicking the .

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Aniket Kedari

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Above two posts contain my entire code.
Make spelling correction for OLoad and OnUnLoad in second post
Run it in tomcat and mozila.
It gives me error altitude is null

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Do you find the posted code to be readable?

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Aniket Kedari

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Really very sorry for not using UBB code in last posts. Noe I have remoced them . Here is my new code with UBB tags.
I know I should give only a code sniplet instead of entire code but I am so naive that I dont know where the potential error lies.

!<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:v="urn:schemas-microsoft-com:vml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>Google Maps JavaScript API Example: Simple Icon</title>
<script
src="http://maps.google.com/maps?file=api&v=2&key=ABQIAAAAzr2EBOXUKnm_jVnk0OJI7xSosDVG8KKPE1-m51RBrvYughuyMxQ-i1QfUnH94QxWIa6N4U6MouMmBA"
type="text/javascript"></script>
 
<script type="text/javascript"
src="http://topocoding.com/api/GETapi_v1.php?key=AYHUJBGGPWRVJQR"></script>
<script type="text/javascript">
 
    function initialize() {
      if (GBrowserIsCompatible()) {
        var map = new GMap2(document.GETElementById("map_canvas"));
        map.setCenter(new GLatLng(18.52,73.85), 13);
        map.addControl(new GSmallMapControl());
        map.addControl(new GMapTypeControl());
 
        // Create our "tiny" marker icon
 
var glassIcon =  new GIcon();
glassIcon.image = "C:/Program Files/Apache Software Foundation/Tomcat 6.0/webapps/MyMap-1/image/img1.png";
glassIcon.iconSize = new GSize(12, 20); 
glassIcon.shadowSize = new GSize(22, 20); 
glassIcon.iconAnchor = new GPoint(6, 20); 
glassIcon.infoWindowAnchor = new GPoint(5, 1);

// Set up our GMarkerOptions object
markerOptions = { icon:glassIcon };

var i ;
var str = "alt";
var data_array = new Array(10);
for(i=0;i<10;i++)
{
data_array [i] = new Array(4);
}

// Add 10 markers to the map at random locations
        var bounds = map.GETBounds();
        var southWest = bounds.GETSouthWest();
        var northEast = bounds.GETNorthEast();
        var lngSpan = northEast.lng() - southWest.lng();
        var latSpan = northEast.lat() - southWest.lat();
        
        for (i = 0; i < 10; i++)
        //while(i<10)
        {
        var lat = southWest.lat() + latSpan * Math.random();
        var lng = southWest.lng() + lngSpan * Math.random();
        var latlng = new GLatLng(lat , lng);
        map.addOverlay(new GMarker(latlng, markerOptions));
        data_array [i][0] = lat;
        data_array [i][1] = lng;
        data_array [i][2] = function( altitude ) {
        document.GETElementById(str+i).innerHTML = altitude;};
        data_array [i][3] = null;
        //i++;
        }
        topoGETAltitudes( data_array, 60 );
        /*
        topoGETAltitude(18.52 , 73.85, function( altitude ) {
        document.GETElementById("alt").innerHTML = altitude;
        } );
        */
      }
    }
 
    </script>

Aniket Kedari

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posted 16 years ago

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Aniket Kedari

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I think now I have posted it correctly.
Please help me to sort out problem in above code.
please change single line containing "body oload" containing correctly and run using tomcat and mozila.