I have a DataTable that I created in C# that looks like.
Column1 - Column2 - Column3
1 - a - b
2 - c - d
3 - e - f
Now if I want to get the value of column 3 with id 3 I simply need to
do something like this (pseudo-code):
string value = dt.rows[3]["Column3"].ToString();
Is there a javascript object that mimics this same functionality? I am
going to use my C# DataTable to create a javascript object that I can
use for client-side functionality before posting back to the server.
Is it possible in javascript to operate on an array without knowing how mamy elements it has? What i want to do is sending an array to a script, and this script should add all values from that array Could you show me a little example how to do this?
i have made an application in php so that people can make, on the fly, a form. when they submit the form there is a javascript formvalidation.
because we do not know how many fields there are in the form (it is made on the fly) i collect all the form fieldnames in an php array and sent it to the javascript function: Code:
Is it possible to have a JavaScript object that works just like a standard Array, except that when the array is modified, a function gets called which can then do some processing on the array?
Like this: // SpecialArray has a function called Notify function Notify() { // process the array with changes made } var myarray = new SpecialArray("zero", "one", "two", "three"); myarray[1] = "ein"; // after this change is made, function "Notify" is called
I know you can derive a new object from Array, but you cannot directly override the [] operator.
Can you add a function or event handler to a regular Array object that gets called when the array changes?
im currently working on a web app which uses heavy javascript. in one of the functions, a simple array is created using "var admin_types = new Array();". This array is not empty, it has a length of 0 but contains one element with the name "clone" and the value
function () { var copy = {}; for (var i in this) { var value = this[i]; try { if (value != null && typeof (value) == "object" && value != window && !value.nodeType) { value.clone = Object.clone; copy[i] = value.clone(); } else { copy[i] = value; } } catch (e) { copy[i] = value; } } return copy; }
why does this element get created?? The weird thing is that i use a lot of arrays and this is the only one that has that element.
i tried this in firefox 1.0, ie 5.5 and mozilla 1.7.1 and the element is in the array for all of them...
All are the same except the value is set differently for each one. The reason for the [] is so I can access the checkbox values as an array on the processing page (when clicking 'Submit');
However, I want my Javascript code to examine these objects first. My onclick event handler function (below) is called (I get the 'hi there' popup), but it does nothing afterward (i.e., neither 'checkbox' alert appears, and the handler, strangely, seems to return 'true').
I suppose my problem is that I am not specifying the checkbox array properly. I tried several variations, but I've been working on this problem alone for several hours and am getting nowhere. Code:
i had write my code by using php language and i would like to pass in an array that generated by using php programming language from a select box through the onchange method.
i had try it but it cant be pass in. how should i code it?
I was wanting to build a javascript error checker function for several forms. Because each form has different inputs (ie, text, radio, select) i'm trying to figure out a way to pass some dynamic data to the function.
The way i'm currently doing it is by passing a long string to the JS function and then tokenising it into element names. However this is going to get very messy ....
I was thinking that, using PHP, i could build a list of the objects to be checked.
Is it possible to pass a PHP array to a Javascript function ...
So i've got in PHP
$array= {field1,field2,field3}
Which i want to pass (in a some manner)
<form name = 'formName' onsubmit='errorChecker(formName, $array)'
I have a pre-populated array in a JavaScript. How to populate TEXTAREA field with the text from that array, each entry on different line on page load? Say, value at index 1 will come at line 1; value at index 2 will come at line 2 and so on.
<script type='text/javascript'> <!-- panelsArray = new Array("form0","form3","form4","form5","blotter"); var blotter = new Array(འ',騦',魒',饼','block',''); var form0 = new Array(餢',ཱི',骹',餑','block',''); var form3 = new Array(鰌',ྀ',馅',飣','block',''); var form4 = new Array(鮵',髧',駨',飶','block',''); var form5 = new Array(Ɔ',Ɔ',魽',饻','block',''); // --> </script>
and I want to parse the first array and then within that loop I want to get the variable name from the 'outer' array and then reference the contents of the array with that name... I was trying to do the following but it doesn't work, I'm obviously missing something about transmogrifying the text "form0" into a variable name...
I have a three tier nested array, used to define a map for a javascript game, and can be edited within the web page. Is there a way I can generate a visible copy of this array that I can then c&p into a file? I think the best solution would be to write into a popup window (this popup would be purely for map development use, so I don't feel worried by popup blockers, as only myself would be seeing the popup). However, I have no idea how to:
a) create the string in a form that a html parser can display as ready-formatted javascript 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 would like to be able to pass a multi-dimensional Javascript array through a form to a server-side script I am running. Any suggestions as to how to do this? I know how to asign a Javascript variable to a hidden field (basic stuff ), and if it was a single-dimension array I would join() it, but I don't know how to treat a multi-dimensional array. Any suggestions?
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=[];
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:
I am trying to understand somecode. I don't think I am understanding everything correctly. Can someone confirm or add to my understanding?
Here is the code, below is my explanation:
- CODE 1 - is saying if the the class subnav_dd is called on an anchor tag on a li, then make the function in the if statement "live". (Live in a sense binds the function to the condition, but unlike bind it allows the condition to be used more then once. ) So if the class subnav_dd is the parent, and has a class of .dis then prevent anything below it from firing. CSS - If code 1 is true, then I will only get the first li to fire, the remaining ones will not.
- CODE 2 - This one is a little tricky. Function ToggleOptions takes 3 variables (target, array, state). The condition is if the div subnav + target have siblings, then check to see how many siblings are there. Put the amount of siblings into an array, then check the state of each sibling. I don't completely the rest of it.
I think if the div subnav is called and something is found in the array then the class dis is either added or removed. Then what? I don't understand why I still need the else that adds a class to #subnav_ +.target
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]..
I am working on a page where the user will select a location from a dynamically generated dropdown list. I was able to create the php multidimensional array (tested and working) from a MySql database using the users information at login, but I'm having problems converting it to a javascript multidimensional array. I need to be able to access variables that I can pass to a number of text fields within an html form.For instance, if a user belongs to a company with multiple addresses, I need to be able to let them select the address they need to prepopulate specific text fields.
This one is throwing me off! Either I am making a stupid mistake or I'm doing it totally wrong I have an array, and I am trying to select unique values from it and assign it to another array. Here is the code:
Code: var flag; for (i=0;i<=pdfs.length-1;i++) { flag = 1; for (j=0;j<=pdfs2.length-1;j++)
[Code]...
The problem is that the if (pdfs2[j] == pdfs[i]) statement ends up never being true. There are URL's to pdf files in the array. On the other side, if there is a much easier way to select unique values from an array, please feel free to point it out.
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.
