I was under the impression that I and object/associative array could have other objects as the keys for properties. That is, I should be able to set myObject[anotherObject] = 1. However, while this seems to work at first glance, any new object I set as a property key overwrites the first one.Here is the result of me testing in my Chrome console:
> var obj1 = new Object();
> var obj1.someProperty = "test"
"test"
[code]....
I am passing some equity option contract data from my PHP processing page to the UI. I am attempting to use the JSON response to populate a matrix. Along the far right column are the strike prices (22, 23, 24, 25, 26, etc) and along the top row are the expiration dates (Jun 2008, Jul 2008, Aug 2008, etc.). My struggle is how to match the option data to the correct strike and expiration date. An example of the JSON response is below:
Code:
{"calls":
[
{"row_id":119,"type":"call","expiration":"JUN 20, 2009","t1":22,"strike":"25.00","symbol":"JSAFE"},
{"row_id":127,"type":"call","expiration":"JUN 20, 2009","t1":22,"strike":"26.00","symbol":"JSAFI"},
[code]....
Would be a JSON returned object that has all the option prices for all the expirations as properties.
With this JSON object as an example:
jsonObj={
key1: 'value for key1',
nextKey: 'nextKey value',
lastKey: 'value for the last Key' };
without knowing the structure of this object... is there a way to return the name of the keys?if it was a nested aray.. each key:value pair being a 2 element array I could do something like this:
var key = jsonObj[1][0]; // this would return 'nextKey'
Is there some way to determine the names of the keys ina json object, as if it was an associative array?
I am trying to setup a textbox to only accept specific keys. The problem is, some of the Function keys are reading as the same values as letters.Ex.
112 - F1 - p
113 - F2 - q
114 - F3 - r[code]....
Is there another way to allow the function keys without enabling all matching letters as well?
I am making a php/mysql epos system for my shop which will be run from a browser on my shop PC. I have large buttons which I would like to be able to 'click' by pressing something like the F-buttons at the top of the keyboard. Is it possible to override the standard button shortcuts for a web page. This is only going to be on my shop computer so accessibility is not a problem.
View 2 Replies View RelatedI have an array of objects that I would like to sort through and "join" objects that are the same. And if they are the same, I need to sum up the number value given for those two items. So I guess Im sorting through and maybe even recreating this array to get rid of duplicates while I tally quantities. see the screenshot of my array of objects to help understand better. The highlighted 'sPSPN' would indicate that it is a duplicate item and its 'fUnits' need to be totalled. in the end I would have a total of 3 objects, because 'sPSPN'= BT-221-44 would now be only one object with 'fUnits' = 35.
View 4 Replies View RelatedI have a set of div elements cached inside var divs = $('#myDivs'). Suppose another div comes along that i want to add (push) to the group. is there a simple method for doing this without selecting ones already in the group for a second time?
View 3 Replies View RelatedDid any one use bind inside for-in loop? In my case it never work correctly whatever I do.I'm trying to go through a collection of objects using for-in and bind MouseEnter handler for each object.What happened is the handler I bound to the last object works for all the objects?!
View 2 Replies View RelatedHow do I go about comparing two jquery objects to see if they're actually the same html object.
I've got:
This should add a border to every object in the selected set except for the one defined in someobject... shouldn't it.
I have a code set up something like this:
[Code]....
The problem is I keep getting an error along the lines of: TypeError: Result of expression 'house' [[object Object]] is not a constructor. It seemed to work when I wasn't passing the other objects as parameters in the constructor. I just created and assigned them later. As in:
[Code]...
Trying to figure out OO programming for JavaScript and I'm totally lost.
Here's what I'm trying to do:
I'm posting search data to a PHP form to run a query on a database.
The structure is sort of like this:
So I'm thinking I need to create search objects or arrays. Initially, I thought I could do something like this:
Code:
This doesn't seem to work. It says object not defined whenever I try to do something.
I've also tried creating a JSON object like this:
Code:
This will allow me retrieve the data like I want to:
Code:
The problem is I can't figure out how to add data to the JSON object without manually typing it in. I need to be able to loop through form elements on my HTML page and set them to these variables. I'm using jQuery and doing something like this:
Code:
I've been working on a function to convert nodeList and object properties to an array. The first question is with regards IE and checking whether the object provided is an HTML collection. The best I have come up with so far, is to test if it's an object, has an 'item' which is a function and has length. The second question is with regards slice.call and a while loop copy. I guess I need to do some profile/timing tests, but I'm wondering if the function merits a slice.call? or should I simplify?
Code JavaScript:
// Some weirdness in IE regarding nodesList and typeof 'item' returning 'Object'
// even though when alerted it returns 'function (){...}'.
// Therefore having to use regExp.test() to check whether it's a function instead.
// Note: _isNodeList isn't full proof. An object with the properties
[Code]..
How can I make an input box (or other objects) disabled or greyed out and
still have them submit in the form?
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.
View 1 Replies View RelatedIs there a better way to extend object with internal objects?
$.fn.bestShow = function(s) {
var d = {
width: 0,
height: 0,
order: "numeric",
orderBy: "",
[Code]...
I wonder if I can associate some keys (e.g. 'Ctrl+T') to some function I create with JavaScript on my webpage.
View 2 Replies View RelatedI'm writing some stuff where I wish to allow the cursor keys to control
elements in a page. This has not been a problem except with Safari
which appears to duplicate the keydown and keyup events which are fired
when the cursor keys are pressed. I.e. pressing and releasing say, K,
results in one keydown event followed by one keyup event. Press any of
the cursor keys results in two keydown events followed by two keyup
events.....
Does anybody know why doesn't onkeypress catch up/down arrow keys
while it catches left/right arrows? My only supposition is that up/
down keys are used for moving between form elements, anyway does
anybody know any solution to this problem?
I'm trying to figure out how to select a value from a list that is filled dynamically using ajax auto suggest Take a look at the small code: when typing in a name by the keyboard this function is called:
[Code]...
I have a little problem that i hope can be solved. You start to type in an <input> field and a list of results show based on what you type, I have a list of Airports in MySQL that is check for LIKE of what is typed in and the matches show that can be selected. But you can only scroll with the mouse and not the arrow keys.
Does anyone know how I may allow arrow keys as well as the mouse to select their choice?
I want to block alt+f4 key using javascipt. Please give some example.
View 1 Replies View RelatedFirstly, apologies for my terrible JavaScript knowledge! I'm getting there! I have an array that is made up of the results of a few SQL queries. The queries return the record id and an integer. I need to sort the results of the queries by the integer. I am trying to store them in an array, using the record is as the key, then sorting the array. However, when I try to get the data out of the array, it has changed the key!
E.g.
Original results
[10605] = 141
[10744] = 116
[18835] = 166
[15304] = 166
[Code]...
Disable Arrow Keys I am creating an online flash gaming site, Aaron's Game Zone: [URL]Some of the games on it use the arrow keys, however IE also uses them to scroll the page. I am learning JavaScript and am trying to write some script to pervent the page scrolling up and down while playing a game.For example.Guardian Rock uses the arrow keys to slide around, at the same time the page scrolls.[URL]
Here is the script I've tried to write to pervent the scrolling:
<script type="text/javascript">
function KeyPressHappened(e){
if (!e) e=window.event;
[code]....
How to use the shortcut keys in jvascript? Any illustration with an example? Such as suppose on clicking the Ctrl+alt key, I want to display a prompt dialog box........How to do this?
View 3 Replies View RelatedWhat I need is something as such (based on previous thread): I have a textfield and I want to limit the input to only numbers, letters and caps.
So the code is:
<input onkeydown="return testChars(event)" type="text" .../>
function testChars(e){
var keyCode = e.keyCode;
if(e.shiftKey && keyCode==53){
return false;
} //block "%"
//HERE BLOCK EVERYTHING THATS NOT a Letter, caps and numbers
if ( (keyCode > 64 && keyCode < 91) ||(keyCode > 96 && keyCode < 123) )//Letters and Caps{
return true;
}else if ( keyCode > 47 && keyCode < 58 )//numbers{
return true;
}}
The problem however using the onkeydown is that I would need to cater for every single possibility of them using SHIFT+1=*, SHIFT+2, SHIFT+3 etc. which would take forever. And I cant block Shift because they might use it for capitalizing letters.
I want a hash table where DOM nodes are the keys. In Rhino, I can just
use the node objects directly as the keys, since the Java objects that
implement the DOM have handy toString() methods that return a unique
string for each object:
var a = {};
a[document] = ...;
a[document.documentElement] = ...;
This is obviously not portable. The portable solution, I guess, is to
come up with a hash function that works usefully on DOM nodes. Has
anyone thought about this problem and come up with a solution? With a
DOM 3 implementation I could even do something like:
var nodes = [];
var nextIndex = 1;
function getIndex(n) {
var i = n.getUserData("NodeIndex");
if (!i) {
i = nextIndex++;
n.setUserData("NodeIndex", i, null);
}
return i;
}
I want this to work with DOM 2 as well, though.
Any ideas?