There's no native linked list implementation in JS. I'm wondering if it would be worth it to implement one.
I'm using a lot of insertions and deletions with arrays of around length 5. How fast are insertions and deletions in JS native arrays compared to an optimized (but not native) linked list implementation in this situation? How about arrays of length 10?
I'm a JS beginner and I find looping through arrays with for/in is very easy. Yet I find lots of code examples where array length is used instead of for/in and I'm thinking to myself, why do it this (somewhat) hard(er) way?
View 11 Replies View RelatedIs there a good linked list implementation in the public domain? Or
that someone on this group has already written that they'd like to put
in the public domain, right here on this newsgroup?
I am trying to use a linked list to add a song. 'A' is supposed to add the song to list of objects. My problem is that every time I append a song again it seems my list gets reset. Also on the side. How come I cant use the showFromMeOn method down in 'P'?
[Code]...
I have a text box labeled "Number of pages" and a select box labeled "Page List"
Requirement: I want tht on entering any integer value in the text box that many pages shall be populated in the list box
[Code]....
I am trying to complete a javascript application and am having problems
with code similar to that show below.
Much testing has shown that Firefox finishes the code shown in around
0.25 secs but Internet Explorer 6 takes a massive 3.5 secs! Internet
Explorer 7 gets it down to around 2 seconds - but that's still 8 times
slower than Firefox and way unacceptable for my userbase.
Looking through the newsgroups there is some discussion around the
differences between the way the two browsers handle arrays - but a
performance differential such as this is just unbelievably dismal.
Unfortunately I need to continue to use arrays of objects and have to
support the Internet Explorer client base. I have already added
specification of the array size and also removed the use of array
"push"ing - flattening the array is not really an option. Code:
I have got a div-container the size of the window itself. So its relativly big.This in turn has a child-div-container which is substantially larger.This 2nd div-container is absolutely positioned in the first and shall now be scrolled using the mouse. Because for this Project i don't want scrollbars.If the mouse moves to the edge of the outer div, the inner div should move in the appropriate direction.For that the first container has a MouseMove-listener and depending on how close the mouse is at the edge, a scrolling-speed-variable is set.Sidenote: the speed has not a linear but a quadratic increase. The moving itself is not the problem, but the calculation.Because of the quadratic increase in speed the calculation is rather expensive.The question is now whether it would be more performant if i create two arrays (for x- and y-axis) in which I store the velocities for each pixel, or whether I re-calculate the speed for each movement.
That would mean, at a window size of 1200x700px I had two arrays. One with 1200 fields ald values and another with 700. And thats a relativly small resolution.In this way the calculation must be performed only once. After that I only need to read the velocities out of the arrays.
Modifying my code:
I have this C# code that is connecting to database and creating a array(list)
Code:
I'm trying to pass it to a javascript function so I can then pass it to a silverlight page so I was able to create this easy javascript that show a aleart box on startup of the list(array)
Code:
But I want to do something like this and can't get it:
Code:
How can I subclass a native class to get my own class with all the
function of the native clas, plus correct instanceof behaviour?
The scenario I'm thinking of is something like
function MyArray() {
Array.apply( this, arguments );
}
MyArray.prototype = new Array();
MyArray.prototype.constructor = MyArray;
var marr = new MyArray();
marr[0] = "abc";
marr.length == 1; // true
marr instanceof MyArray; // true
But this seems impossible due to the Array constructor returning a new
object even when called with my own "this" in the apply() above. Can
this be solved in any way?
I'd like to announce release 1.0.7 of JNEXT (JavaScript Native
Extensions). JNEXT is an open source framework for securely accessing
the full range of native OS resources (files, databases, sockets etc.)
by using JavaScript from within a Web Page. It is light weight, cross
platform, cross browser and designed with simplicity in mind....
what I want to do is clone the Object String and be able to use the clone. In essence what I'm looking to do:
var x = 'me';
String.prototype.returnMe=function(){return this;}
alert(x.returnMe(x)); // alerts: me
[code].....
wat does "native code" in firefox dom inspector mean?
function hasAttribute() {
[native code]
}
can anyone help me with this?
I would like to do this WITHOUT jQuery.
I have tried to get an event listener to listen for when the user presses Control-D on their keyboard. This would trigger a confirm delete function - if you've ever used QuickBooks Ctrl-D is the command that does this and this is a financial application.
Problem is that in FireFox, Ctrl-D means bookmark the page and this window pops up. I want to "return false" before this happens.
On this subject I would also like to take over Ctrl-C and Ctrl-V eventually but with Ctrl-D it will work for anything. here is what I have. Again, IT WORKS, but doesn't stop the natural event (bookmark page) fromhappening:
Code:
function AddOnkeypressCommand(strCommand){
//---- version 1.0, by , last edit 2004-12-14
//add to array of commands:
m_onkeypressCmds[m_onkeypressCmds.length] = strCommand;
[Code].....
Am I the only person who finds wildly wrong the jQuery behavior of handler invocation for native events on state-changing elements like check boxes and radio boxes?Specifically, when the user clicks a check box or a radio box, the state of the element is changed and then the handler is invoked.However, when I call"click()" on the elements, the handler is invoked *before* the element value is updated. That makes it pointlessly difficult to write handler routines that need to look at the value to know what to do.
View 2 Replies View RelatedI could have sworn I saw a command that allows Javascripts to use the browser's native base64 encode/decode but I must be Googling for the wrong terms. Do most browsers expose these converters to javascripts's there a way to use these converters?
View 1 Replies View RelatedI was wondering if there are any sites dedicated to ending javascript objects using the prototype property to give them features like trimming string, removing elements of arrays by name, removing duplicates in arrays, etc. Granted I have functions to do this but there's probably a ton of other good ones out there. Most things I've seen are frameworks like JQuery (which is awesome) but it doesn't extend these objects.
View 2 Replies View Relatedthis might be a simple question, but I'm not really that familiar with JS besides some onmouseover FX:
i got a list of strings separated by a comma. the text might contain accents as well, ex:
HTML Code:
wendy's, pizza mario, charles manson
I need to turn this list into an array.
how do I do that?
How do you alert a new array list ? code...
I want a alert of the array list after the pushing,pop'ing and splicing to appear before the alert of which array to display which is alert.people[5]. code...
I have a series of links in my page, all with its title atribute filled. The thing is that I don't want the browser to show this title whenever i hover those links, but still want to have mi titles in the markup Is there any way to do it?
View 1 Replies View RelatedMy goal is to get the value in the array from selection drop down list.Basically, I create an Array in Javascript and a selection drop down list in the body.
Code:
<script type="text/javascript">
var even = new Array(2, 4, 6);
[code]....
I'm trying to find out the min and max values of randomly generated values in a array list. Its a checkout system that randomly add a customer to a queue and does the same to remove a customer depending on a randomly generated number. I've managed to figure out the mean of the queue but can only display the total values added to the list rather than display when the queue was at it biggest value.
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.ListIterator;
import java.util.Queue;
import java.util.Random;
public class Checkout {
private Queue<String> tillQueue;
private int rndNumber;
private int currentLen;
private ArrayList <Integer>lengthList;
private Random r;
public Checkout() .....
I am developing a jsp page which displays a calender for this i have succeeded to get month correctly when coming to dates it is giving only one date.This is my problem so i decided to add an arraylist for dispDay but i dont know how to do this so pls suggest me to get dispDay i.e., days in a month with arraylist i am sending my jsp code and java bean file.
# <%
#
# 'Calendar loop
[code].....
I am coding a random name generator in javascript and at the moment I have the first names and last names in two seperate arrays. I'm adding more names into the javascript itself and it gets messy after a while. When the list is populated to hundreds of names it's gonna be tough keeping track of things.
I was wondering how to have the names listed line-by-line in two text files (first name, surname) and to call the files when the user clicks the generate name button.
I have a php script that gets all images in my directory and outputs them as gallery[0]=firstimage.jpg, [1], [2], .. The php script is supposed to work with the javascript, so to cover all angles here is the php
<?
//PHP SCRIPT: getimages.php
Header("content-type: application/x-javascript");
//This function gets the file names of all images in the current directory
//and ouputs them as a JavaScript array
[Code]....
I have a few String prototypes such as String.prototype.EscapeReg = function () { return this.replace(/[-[]{}()*+?.,\^$|#s]/g, "\$&"); }; // Escapes characters for use with a regular expressionI also have my own class/ library which is used like this var adg = new AndyG_ns.ADG_Utils(); adg.StartClock('AndyClock','dd mmm yy hh:nn'); // etc.What I would like to do is to only add the prototype to my library (not to the global namespace). The end result I'm looking for is to use code such as:
var adg = new AndyG_ns.ADG_Utils();
var myString = new adg.AString();
var parsed = myString.EscapeReg();
In addition, I want to be able to also use/create my special string sub-class within my library. I suppose I'm saying that I would like to extend or super-class the native String object.
Is there a way to tell when the user closes the browser that doesn't
also happen when a page is merely being refreshed?