I have an associative array like this:
arr[x1]=30; arr[x2]=20;arr[x3]=40;arr[x4]=10;
I want the sort function to sort keys in ascending order of the values
on the right hand side with the following result:
x4,x2,x1,x3
Firstly, 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
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I want to create an associative array dynamically pulling the index values from an array (propertyArray); Associative array is created inside create function and then returned. But after it is returned, I cant use index names to retrieve values. It returns undefined as below code shows.
Code JavaScript:
var propertyArray=["a","b","c"];
function create(){
var array=[];
[code]....
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 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.
I am building a customised javascript prototype to sort an associative array on the array key (in ascending order). Basically, I am separating the array keys into a separate array and then using .sort() to sort the keys and then reassembling the original associative array elements according to the sorted keys array.
The sorting works ok except that when I run the test code below, the outputed sorted associative array has an extra element at the end of the array whose key is the name of the prototype function and the value for that element is the function code itself. Obviously I am misunderstanding something about associative arrays or how javascript prototypes work.
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I was tasked with creating a CPA calculator in JavaScript. I am currently struggling with the part where I will convert the letter grades to Number (a=4 b=3 etc...). I have a switch case function that is working when I enter the spec. letter value, but it is not working when I try to use the array that I created. How I can get the total of the grade column to show up at the bottom after all the prompts have been run through and the letter grades have been converted to numbers.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0.1//EN">
<html>
<head>
<title>GPA CALCULATOR</title>
<link>
<style type="text/css">
</style>
<script language="JavaScript">
do { //beginning of do/while loop to make sure user enters their name
var userName = prompt("Please enter your name:", "")
} .....
New to javascript here. I'm trying to do something that would be very easy to do in php, but is quite hard in javascrpit due to the lack of support of associative array.
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push() to add clickedElementId as a value associated to a numeric key, but then how would you remove a specific element from the array? How would you approach such a typical algo in javascript? Regards,
Is it possible to have an Object as the key for an Associative array
like in the following example....
function Obj(var1, var2)
{
this.var1 = var1;
this.var1 = var1;
}
function test() {
var sectionArray = new Array();
var obj = new Obj("c","k");
var obj2 = new Obj("3","n");
var obj3 = new Obj("v","qk");
sectionArray[obj] = "king";
sectionArray[obj2] = "queen";
sectionArray[obj3] = "joker";
alert(sectionArray[obj]);
}
This does not give any error but the alert says "joker" instead of
"king". Is there anything wrong with my code or is an Object something
that just can not be used as a key.
If it is the latter can someone please suggest another way for me to do
it? Can I use a concatenated String instead of an object? My only
problem then is how would I extract the values from the String, does
JavaScript have a tokenizer method like Java?
I am having a problem with this test html below. When I enter a correct
city I keep getting an "Object expected" error on the town field....
Something like this:
['level1key':['level2key:'value']]
That is the value itself is any object.
How can I check if a key is defined in an associative array?
var users = new array();
users["joe"] = "Joe Blow";
users["john"] = "John Doe";
users["jane"] = "Jane Doe";
function isUser (userID)
{
if (?????)
{ alert ("This is a valid ID"); }
else
}
But what goes in place of the ????
I have been trying to figure out how I could go from an associative array to JSON. Is there a function for this?
View 10 Replies View RelatedI m using an AutoComplete Textbox..!! i want to pass id and value to the next page..!!
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Your table-driven application has a MySQL table on the server side and you want a Javascript associative array on the client side to do rapid look-ups.For example: My application uses the value selected from the form’s drop-down menu to choose which other form fields to hide or show. This choice of a 'Long Form' is table-driven from product data in a MySQL table.
Convert the MySQL table to an associative array in JavaScript.I am using the jQuery library to manage the presentation and form validation on the client side and PHP and MySQL on the server side.Since a JavaScript Object is an associative array and the MySQL table is being used as a look-up table (associative array) I use the PHP function json_encode to create a JSON string - JSON is JavaScript Object Notation - on the server which is then evaluated as a JavaScript Object on the client. The two parts (server and client) of the code are listed below.All very straightforward then. So why the blog?This is what I do (here's the PHP code):
do { $key = $row['ProductKind'];
$value = ($row['LongForm'] ? True : False);
$arr[$key] = $value;
[code]...
As a newcomer to jQuery this is a good opportunity to show my appreciation to John Resig and the people that have contributed to the jQuery library ... not forgetting those who have integrated all the MySQL and JSON stuff into PHP. It's all very neat ... when you get to understand it!You could just eval(data) to turn the JSON string into a JavaScript Object (a.k.a. associative array), but JSON.parse protects your code against evaluating malicious scripts that could be embedded in the JSON string. This function is found in the json2.js downloadable until included in native browser JavaScript engines.The PHP Booleans translate automatically into JavaScript Boolean types.
[Skip this: My application has a MySQL table of product categories that tell me whether I need to present the administrator with a long form or a short form in the HTML. So, as products are added over time, I want to the administrator to choose whether a new product category can take the short form plus some default values or will require the explicit input of all product values in the long form. As the administrator assigns a category to a new product - and changes his mind half a dozen times - I don’t want to keep on going to the server to do the look-up but want to have the table in Javascript to keep the form presentation responsive. Also, the MySQL tables are on a third party’s server remote from the web server.]
I need a way to store an associative array in a cookie. Or maybe JSON encoded string. I am using jquery.
var cookie=[];
cookie["product_1"]=[];
cookie["product_1"][cookie["product_1"].length]=12;
$.cookie('uploads', $.toJSON(cookie), { path: '/', expires: 10 });
am just trying to learn javascript and my friend gave me a little assignment to try and figure out. i am having trouble figuring it outbasically i just want to display the information in my associative array, into an html table.
var NFC_east = new Array();
NFC_east[0]=["Giants", 16, 0, "Eli Manning"];
NFC_east[1]=["Cowboys", 0, 16, "Tony Romo"];
[code]....
I'm trying to create a multi-dimensional associative array that has some of its data created dynamically. The code I've currently got is as follows (using JQuery to retrieve form element values):
Code JavaScript:
var data = {
label: $('#label').val(),
child_float: function() {
[code]....
.. if its values were not being created dynamically. However as you can tell that isn't what is being generated at the moment, as there's no opening/closing brace before/after the child_float's member variables. Any ideas what changes I need to make in order make the child_float behave as intended?
Lets assume the following object
Code:
var x = {
y: {
z: 10
}
} ;
Next, I need to retrieve the value '10', but the only thing I have is one string as a key For example (this doesn't work):
Code:
var str = '[y][z]' ; // or 'y.z'??
alert(x[str]) ; // should alert 10
Can this be done using a single string as input for x ?
UPDATE: a solution which comes close to what I was looking for is
Code:
var str = "x['y']['z']" ;
alert(eval(str));
I'm trying to create an associative array in javascript from within the loop that sets up my html table. I can't get my head around assigning the associative key-value pair (probably not the best way of putting it). I've written the below in php. What's the equivalent in javascript? The => is the part that's baffling me.
PHP Code:
$test_array[] = array ([INDENT]'seller_id'=>$seller_details[$column]['seller_id'],
'products_id' => $item_details[$idval]['products_id'],
'shipping_price' =>$item_details[$idval]['shipping_price'])[/INDENT]
I am really hoping someone is willing to take the time to read this post and take a minute to take a look at my code. What is happening is there are some matches for a script I made and then an area for segments during an event. If you notice on the segment part of the form is that there is a dropdown that asks for where in the event that segment needs to go. With the Introduction or the different numbered matches. What I need to happen for a subArray I need it to take the introduction, all the matches, and all the segments and order them accordingly. With the introduction first, the matches in order based off there match number and then the segments in between the introduction or matches based off the user's input.[URL]..
View 7 Replies View RelatedGiven a JavaScript "array" (ok, so really they are "objects" but it's being treated as an array...) in the format
HTML Code:
var patient_code = "0"
var header_id = "1";
var question_id = "1000";
fake_data_array["patients"][patient_code][header_id][question_id]
HTML Code:
var fake_data_array = new Array();
fake_data_array["heading_information"] = new Array();
[Code]...
What's happening is, '1000', '1001', '1003', '1004' are being cast as integers, not strings, and it's "filling in" the first ~999 keys as 'undefined' so the length is returning something like 1005, not 7. I'm manually writing the arrays now, and will eventually be building this massive js array from a collection of existing PHP arrays. Is there a way to forcibly cast the values as strings?
I would like to have an array and define which element goes to what key. Something like this:
Code:
var test = [][];
test[0][0] = "foo";
test[0][1] = "bar";
However I am wondering if its possible to write it in one statement? Something like this:
Code:
var test[0] = [
[0] => "foo",
[1] => "bar"
];
The code up doesn't work of course.
I'm trying to sort these divs based on they're id after they've been outputted to the screen. How can I do this?
Code:
<div class="dateids" id="APR-13-2010"></div>
<div class="dateids" id="APR-13-2010"></div>
<div class="dateids" id="APR-14-2010"></div>[code].....
I'm trying to present a collapsible list if keys which when expanded will have a delete button at the end of it. My problem is that when this code runs, the confirmation alert shows the key name as the last one read from the array for all items. Here's the complete function:
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why this code invokes the deleteNote function with the last key name for all notes?
in PHP I can create a multi-dimensional array with strings for keys,eg
$arr['key'] = array("item 1","item 2");
This works if the string is a variable as well, like
$key = "MyKey";
$arr[$key] = array("item 1","item 2");
I'm trying to something similar in javascript, but with no luck
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