Objects With Literal Notation ?
Aug 17, 2010
I've started learning writing javascript objects with literal notation...
Instead of the usual syntax...
The problem is that it's hard for me to adapt procedures which I'm used to within the normal syntax for the literal notation. E.g:
Is this variable global or local? If it's local, how do I declare a variable globally? I also wonder if it is possible to bind events to objects from within the object? And if I'm correct - jQuery is coded this way, but how can they then make use of their selector:
When it is an object defined with literal notation that doesn't have a constructor?
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Jul 1, 2009
I'm declaring a class in OLN:
Code:
The problem is that in IE, when I call myfunc() it complains with the error: Class is undefined
I'm not sure what I'm doing wrong. Class is declared in as much global scope as possible, and that shouldn't even matter in JS.
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Oct 9, 2010
I have the following code:
A = {
"value": "a",
};
B = A ;
B.value = "b";
alert (A.value); // => b
I expected A.value to be "a". how can I change values of a new object, without changing the parent-object?
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Dec 31, 2009
How do I start my literal object as a function like you do when you use the new Object method.
e.g. var fn = function(){ ...code...}
var func = new fn();
I'm trying to achieve this using the literal object method like:
var fn ={
key: ''
}
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Nov 22, 2010
what is the best way to setup one literal to be the prototype for another?So far I can only think of making a copy into a constructor.
Code JavaScript:
var meths = {
// creates a constructor function populated with a shallow copy of child
// the prototype for the new instance is set to the parent.
[code]....
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Nov 28, 2005
I am having a terrible time getting the following code to work:
var foo = {
bar : "bar",
fooTwo : {
bar : foo.bar
}}
When this code runs, I am told that foo.bar does not exist in line 4. Why am
I getting this error?
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Aug 8, 2005
I have difficulty understanding how square brackets work in JavaScript and this is causing me difficulty retrieving the values of the options of my Select controls.
My form contains many select boxes. Their names are stored in variables(in this case concat is the select control name) and I have no trouble accessing methods for the select object ie:
document.Allan.elements[concat].selectedIndex;
I would like to get the value of the selectedIndex but I am having difficulty because I don't know the right syntax. I'm looking for a statement like the one that follows but uses variables
document.form.theDay.options[2].text
Could some one help me use the right syntax?
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Apr 30, 2007
Is it possible to have something like the following so that 'three'
can access 'one':
var x = {
one: 1,
two: { three:this.one } // Or parent.one ?
}
If not (which I have nearly come to a conclusion on) what is the next
best way to accomplish this?
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Apr 26, 2011
i want the following var i="name";console.log({i:'value'}); o be equivalent to (as an end result)
var i='name'; var t={}; t[i]='value';console.log(t); is that possible?or must i use the second method?
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Oct 7, 2005
I did some searching around, but didn't see this addressed directly. Here is an example of when dot notation fails in Firefox, and when SetAttribute doesn't fail: Code:
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Aug 23, 2011
I'm trying to put a function in a object created using JSON notation. The syntax looks like this...
Code:
historySet = { ajaxRunFunction: "updatePageCopy('" + pageID + "','','" + pageName + "')"};
It works fine in FF, but in IE it calls the function updatePageCopy when it creates the object history set. I don't want to call the function when the object is created.
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Apr 17, 2011
Is there a way in Javascript or Jquery to return an array of all objects underneath a certain point, ie. the mouse position. Basically, I have a series of images which link to various web pages but I have a large semi transparent image positioned over the top of the other images. I want to find the href of the background image that the mouse pointer clicks over.
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Oct 3, 2011
I'm trying to get a return of
[
["red","green","blue"]
,["blue","red","green"]
[code]....
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Sep 5, 2009
Is there a better way to extend object with internal objects?
$.fn.bestShow = function(s) {
var d = {
width: 0,
height: 0,
order: "numeric",
orderBy: "",
[Code]...
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Oct 17, 2006
Below I declared a basic object literal with 2 methods. The
"doSomething" method is call from the "useDoSomething" method but the
call is only sucessful if I use the "this" keyword or qualify the call
with "SomeObj".
Can someone describe why this is happening?
var SomeObj = {
doSomething : function()
{
return 'Did something'
},
useDoSomething : function()
{
//Doesn't work - doSomething() no defined.
return doSomething();
//Works
//return this.doSomething();
//Works
//return SomeObj.doSomething();
}
}
alert(SomeObj.doSomething());
alert(SomeObj.useDoSomething());
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Jun 6, 2006
How would one make the ECMA-262 String.replace method work with a
string literal?
For example, if my string was "HELLO[WORLD]" how would I make it work
in this instance.
Please note my square brackets are not regular expression syntax.
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Mar 16, 2007
A section of my webpage consists of two dozen lines of text displayed
by sequentially calling:
function printText1( text )
{
document.getElementById( "textLine1" ).innerHTML = text;
}
....
function printText24( text )
{
document.getElementById( "textLine24" ).innerHTML = text;
}
Is there a way to parameterize the string literal (textLineXX) so that
I can do it all by repeatedly calling one printText function?
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Jun 14, 2010
I have the following code which attaches a function to events in x number of comboboxes (x will probably always = 4, but I do not want to hard-code this). I wish to pass the value of i to the function being attached as well as the value of tempData. In other words, I want the parameters in function to be the value, not a reference variable.
In the current example, I am using the hard-coded variable ci. This I want to be replaced by a literal created when the event handler is attached (the value of the loop variable i). Also, notice that I get the filter value in the event handler (assigned to the variable ct). I would like to replace this code with the value of tempData which would also be determined when the evenet is attached (it is the same value in this case, but it keeps the onChange event from having to do this each time it runs).
var props = {
col_0: "select",
col_1: "select",
[code]....
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Jul 2, 2010
I have read this from the interentfunction getArea(radius)
Imagine we want to create lots of circle objects using our object as a base - if we declare using the object literal, were not able to do that.
But the new operator can do that - basically allowing us to re-use a user-defined object.
can't understand on the above why we declare using the object literal not able to do that.
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Oct 2, 2007
I am having a hard time getting the javascript file to run any of the functions after I've changed my original script to object literal format. Please tell me why it isn't working! I have attached a zip format of my code.
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Jan 25, 2006
im trying to read an xml file and put it into a textarea on my page.
here is the code that returns the xml file as a string:
Document doc = new Document();
SAXBuilder saxBuilder = new SAXBuilder("org.apache.xerces.parsers.SAXParser");
XMLOutputter xmlOut = new XMLOutputter(Format.getPrettyFormat());
doc = saxBuilder.build(filesName);
String xml = outputter.outputString(doc);
no when i try to pass this to a javascript as follows:
function putXML(fileName){
var blah = '<%= xml %>'
document.btraxtestForm.HighwayMessage.innerText=blah;
}
it gives me a unterminated string literal error.
also, i will never know the contents of this xml file so i cant split up the string.
has anyone any ideas how i will fix this?
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Jan 2, 2011
There are two arrays named myContacts and getRes. When I use myContacts array it works fine. When I assign some value for getRes array which is exactly similar format like mycontacts array, but it’s a dynamic value which I already checked no error In the data content. But am facing problem with dynamic value which gave me not same as myContact. tq
var myContacts = "";
var getRes = "";
[code]....
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Oct 19, 2005
Below is a stripped down example of code I'm using to count links in a
list. My intent with the ShowLinkNumber() function was to display the
number of the current link. (e.g. click on link 2, and the message "2"
pops up; click on link 4, and you see a "4.")
For reasons I can't trace, my function always displays the last number
in the list. Why does it do this, and can anyone suggest a way to
achieve my goal without adding markup? Code:
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Jun 23, 2006
The XML my PHP app is returning to my JavaScript function has elements in
it that contain special characters... specifically the ampersand & which
hoses up the data. ex: Company Name = "K & B Construction".
Can anyone give me some idea of how I make the data coming out of my
database translate as literal characters in the XML output?
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Jan 24, 2009
Error: unterminated string literal
on this line?
document.getElementById('id_company').innerHTML = '<span class="textGreen"><strong>news</strong></span>';
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Jun 30, 2011
I created a simple WYSIWYG for creating CSS based webpages. It works exactly as assumed in Safari and Chrome. However, in firefox, when you copy/paste more than one line of text, instead of formatting it as html, in puts in line breaks causing the array storing all of the data to break into multiple lines and causing an unterminated string literal.
1. suggest why it is behaving this way?
2. suggest a work around to allow it to work on FF?
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