Create Methods That Can Be Used By All Elements?
Mar 1, 2009Creating methods that can be used by all elements?
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Difference Between Privileged Methods And Object.create
Apr 13, 2010I'm attempting to understand the use of privileged methods when used with Object.create. I put together a quick demo (code below) that shows what happens when I use Object.create to create a new object based on one that has a privileged method. The outcome is not pleasant, as changing the value in the first object also changes it in the second. Unless I am reading Crockford's articles incorrectly, this makes Object.create almost useless for anything but objects that have only public members.
I've seen many JavaScript programmers use closures extensively to create private members, and that still holds to be a good programming practice. However I still can't find an elegant way to create inheritance in combination with closures in JavaScript, given downfalls such as the one I mentioned above.With all of that said I still think Crockford has a nice way of programming, creating factory functions that produce objects, staying away from the prototype property and making the language look more functional.
Here's the code to demonstrate what I'm referring to. Firebug needs to be enabled to view the console.debug output, otherwise convert them to alerts.
if (typeof Object.create !== 'function') {
Object.create = function (o) {
function F() {}
[code]....
JQuery :: Methods Not Working On Newly Added Elements
Jan 5, 2011I can't make jQuery methods (html, hide etc.) work properly on newly added elements (added via ajax). It's fine with the the current elements of the page but doesn't work on new ones! I am new to jQuery.
View 7 Replies View RelatedWay To Create Elements With Json
Jan 12, 2009I want to write a javascript that will add x number of cells in a table - each with an input form. In my case 1 row (3 cells) with input forms[code]...
View 1 Replies View RelatedJQuery :: Create Elements And Functions?
Apr 20, 2011Im initiate with jQuery now and trying to create some elements and, after that, create functions for this. What i do is:
[Code]...
function" works fine, but when i try to execute the "close function" i cant get he result. Its seems like after create element, i cannot use any action with jquery for. I know, probably this is very simple, but i need to practice step by step.
Create Elements For Image Displays?
Mar 3, 2010I'm trying to use an ajax function to load filenames into a text area. This works and is not the problem.Then I read the contents of the text file and create an array of file images. The images can be .jpg, .gif, etc. Again no problem.However, when I try to create new <img ...> elements with a 'createElement' function, I get major errors. I think the problem is in the 'AddImage()' function in the code below.
Code:
<html>
<head>
<title>Image Display</title>
[code]...
Create And Remove Elements On Button Click
Feb 3, 2005i want to do something like this,
when i click a "CREATE" button a row should be created which contains 5 columns.
In
first column check box,
second column textbox,
third column textarea,
fourth column radio button,
fifth column a button with "DELETE" as value, which on click should delete the created row.
the number of times i click "create" button that many rows has to be created.their names also should be generated dynamically.
Using To Create Table Rows Containing Form Elements?
Apr 26, 2005I am really struggling with a little bit of javascript I am working on. I know the solution with a bit of javascript is simple but unfortunately I am no javascript wizard.I have a form that will initially contain 1 table row with 3 form elements (2 text boxes and one dropdown select). The form tags are wrapped around the table. What I want to do is use a form button to add new rows on demand. So if the button (labeled with a +) was clicked a new row would be added with the same 3 form elements listed above but with a new name for the element (1,2,3 so on..). Each time the + was clicked a new row would appear. I know this is probably simple but just can't seem to find any examples anywhere on this entire world wide web
View 14 Replies View RelatedJQuery :: Create A URL That Presets A Bunch Of Elements On The Page?
Jun 16, 2011I really don't know how to explain this well.
[Code]...
So when a user goes to that directly, all the presets are already there? (since my updateResults function already sends that data along when the user is actually using the page, perhaps I could just somehow parse that url and call my updateResults function with the requested parameters...
JQuery :: Syntax: Create And Add Multiple Elements To Page?
Feb 4, 2011Is there a cleaner way of creating a mixture of different elements and adding them to a page e.g.
[URL]
JQuery :: Create A Loop Taking Elements That Id Matches A Pattern?
Nov 3, 2010I am trying to make some changes in Prestashop, an ecomerce platform that make use of jQuery library.
I just found out the way they do the onmouse over efect for the different pictures of a particular product.[code]...
JQuery :: Create JSON Data Format By Grabbing The DIV Elements Ids And Innerhtml Of It ?
Aug 24, 2011I have some DIV elements having some ID and content in it .. for example
I have submit button when I click this ... I should generate a JSON data structure like this
I need to POST this on submit button clicking.... I have seen some serializeArray() function but it works well for form based elements, I have created some string based structure in which I am printing the single quotes and double quotes like this fashion by creating a array and pushing itvar result = new Array();
Is there any short cut to create JSON with this datas ...
Javascript Using Java Methods
Jul 23, 2005Can Java classes/objects be used from within the javascript code on the
HTML page? I.e., can I call a Java method from the javascript function?
Accessing An Object's Methods
Sep 8, 2005I have a javascript function that needs to access methods of a java
object(localTag). In my JSP I'm trying to include hidden fields for
the Strings returned from the getter method calls of the object like
so:
<html:hidden name="FrmCustomerHolding" property='<%=
"localTag.getTagName()" %>' />
<html:hidden name="FrmCustomerHolding" property='<%=
"localTag.getTagValue()" %>' />
If I can do something like this, what is the correct syntax and how do
I access this property in my javascript? When I have a hidden field
that is just a String, I access it in the javascript like
"document.getElementById("theString").value" and it works fine, but I
can't seem to find how to access the String value of a method call.
Targeting Specific Methods
Mar 12, 2007I am wondering if it is possible to get the response from a method
within a given page, and that function alone? Traditionally, I have
been getting the response from the Page_Load method of the targeted
page, but now I want the response from a particular method on the
target page:
Public Sub SomeCallback(ByVal sender As Object, ByVal e As EventArgs)
'RETURN XML FOR CALLBACK
End Sub
Using Object Methods In AddEventListener
Jul 20, 2005When you use addEventListener (or addEvent in IE) to call an object
method, does it call it with the correct this parameter?
The ECMAScript reference has a lot to say about the caller using
Function.prototype.call or Function.prototype.apply and passing the
correct this pointer for the context, but how does addEventListener
determine the correct this pointer. Or does it just punt and pass the
global context, thus making it impossible to refer to the object this
in an object method used as an event listener?
JQuery :: When To Use Setter Methods?
Jan 31, 2010About when to use setter methods. For example, I have this code
Should this be used like this:
I think a better question is when to use the .each loop? Since, the first line of code I have works fine.
How To Convert From Switches To Methods
Mar 26, 2009So I have this homework assignment where I need to get my application from switches to using methods to give me the same result. I usually am good in this class, but right now I am completely lost. Here is a piece of the code using switches:
/* Get Type of Math problem from the user */
input = JOptionPane.showInputDialog(null,"Enter the type of Math Problem"
+ "you would like to solve:
"
+ "Addition = 1
"
+ "Subtraction = 2
"
+ "Multiplication = 3
"
+ "Division = 4
"
+ "Enter the number of your choice: "); .....
I need to get this same result by using methods. I can use these method signatures:
public static int readProblemType(){}
public static int getAddProblem(int randomValue1 int randomValue2){}
public static int getSubProblem(int randomValue1 int randomValue2){}
public static int getMultProblem(int randomValue1 int randomValue2){}
public static int getDivProblem(int randomValue1 int randomValue2){}
public static int readAnswer(){}
Looking at what I need to do, how would I use public static int readProblemType(){} method to read the problem type? Or where should I start?
Arrays/Methods Syntax
Apr 10, 2007Programming assignment: Write a program for analyzing El Paso weather. This program must allow the user to enter dates followed by temperatures at these dates. Assume that we are only tracing one year, so the overall number of such dates does not exceed 366. Your must then output the following information:
*the average temperature;
*the list of all the days when the temperature was below freezing (i.e., below 32);
*the hottest temperature, and the list of all the days when the temperature was the hottest.
Main difference: In the previous assignment, following our advise, you stored the dates in one array (array of strings), and temperatures in another array (array of numbers).
For this new assignment, define a class Record whose objects contain two fields:
*a field date that contains the date, and
*a field temperature that contains the temperature.
Instead of using two arrays, use a single array of records (i.e., of objects of type Record).
The problem I'm having, is that I do not know how to read from two files and store the information into one array. (For example: with this assignemnt, I need to have one array with 366 fields, and in each field there needs to be a date and temperature.)
Coupling Between Object Methods?
Jun 10, 2011I have more of a programme design related question here: I have an object with 2 methods, those two methods are supposed to be called repeatedly one after the other (e.g. by setInterval())
window.setInterval(function() {
obj.method1();
obj.method2();
}, 100);
the problem with this code is that the execution time of those methods may increase depending on the processed data (an array with several hundred elements or more) so it may be, that the execution time of both methods exceeds the given repetition time. I could solve that by placing a call to the next function in each method, but I wonder if that is good design or not (tight coupling)
code for method2() is analogue
Obj.prototype.method1 = function ()
{
/* working code here */
[Code]....
Methods Masquerading As Properties?
Aug 2, 2011How are methods masquerading as properties? Does this make methods more flexible as objects or plain functions?
View 6 Replies View RelatedAdding Methods With Prototype?
Mar 19, 2010I pulled out an old javascript object I created a while back a few days ago and I've been developing in Firefox ever since. Then I decided to test how it worked in other browsers and.....it works in none of them! Not chrome, not IE(7/8), not opera, and not safari.
It's built like this:
Code:
function myCalendar() {
//constructor function
}
myDiv.prototype.newMethod = function() {
[Code].....
It's really as simple as that....what's on the go? Do any JS experts out there know anything about this?
What Methods Does Every Object Have By Default
Dec 8, 2011When a custom object is created in javascript, then methods need to be defined for this object. Still every object has toString() method available to them, even if it is not defined. How is this method available to all the objects ? Is it inherited from some root object ?
Is sort() method available to all the objects ? What are the other methiods available to all objects ? Where can I get list of available methods ?
Memory Requirements For An Object's Methods
Jul 23, 2005I am a little confused how the memory for objects is allocated in
JavaScript. David Flanagan, in "javascript: The Definitive Guide,"
states that each property of a class takes up memory space when
instantiated. So space is created for aMethod three times in this
example: Code:
Obtaining A List Of An Obect's Methods.
Dec 6, 2006I just wanted to know if there was any way to use script to display a
list of methods linked to a particular object? The object I have in
mind is getBrowser(), and I can't seem to find any documentation online
with regards to it's methods.
Also, as I am learning, it would be nice to be able to know what
methods are available for a particular object/function, without
necessarily having to spend a while looking up an object's method when
it's documented in a lot of different places, but only vaguely.
JQuery :: First()/last() Methods In The API Docs Website?
Jan 21, 2010I have been trying to discover why the first() and last() methods are not working in my jQuery 1.2 nor 1.3 tests. After searching for a while, I found the alternative way with filter() and eq(), but I still wonder why none of those methods work.
The API documentation [URL]... states that they are available since 1.2, but they won't work, I always get a "not a function" error. I also found a tracker entry [URL].. discussing the need for them, but nothing is clear from it.