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I've a text file with alphanumeric information... Now I want to parse the file using javascript
Text File contents looks like below:
File file1 111 1.008665 0.249284
Action 1.008611 0.249679 10
Action 1.008479 0.250069 10
EndFile
File file2 112 1.008322 0.248816
Action 1.008443 0.248858 10
Action 1.008555 0.249284 10
EndFile
.
.
.
In the above text file I want to save each file tag information in a seperate data structure so I can use them ..
Can you plz help me in this senario. Thanks
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I don;t think you can do that directly with javascript - unless you put the file contents in a textarea - as js does not have access to files outside of the browser - so you may as well do it with a server side language (PHP/ASP)
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You can use Regular Expressions.
Example:
<script type="text/javascript">
var source;
var re=new RegExp(/File([^\^]*?)EndFile/g);
var matches=source.match(re);
if (matches!=null)
{
for (i=0;i<matches.length;i++){
alert("Match #"+i+" is "+matches[i]);
}
}
</script>
Hope that helps.
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when i create sign-up form i select the country india in combobox1
but when i select country india in combobox1 then it should show me
the states in combo2 related to that country only?
please tell me the code in detail?
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So you need to apply a filter to the content of combobox2. Without knowing anything about how it is populated or even what language you are using thats all I can tell you.
Bob
Ashfield Consultants Ltd
Proud to be a 2009 Code Project MVP
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Hi
I have a URL in html format.
For example:
http://wutever.com/
And I want to convert it to:
http://wutever.com/
How can I do that?
Is there any function like encodeURI() ?
Any help would be greatly appreciated.
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PHP func is htmlentities i think
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Marc Firth, thank you for your reply.
I want to do it in JavaScript  Is there equivalent function in JavaScript?
Or do I have to write my own?
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dear all,
i really want to know the way to get reference to an iframe object in my asp page. i want to store src of this iframe in session object. can anyone tells me how to do so?
thanks, if u can give me the answer.
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<script>
var mysrc = document.getElementById('myframe').src;
//jquery
$.get("store_in_session.asp", { src: mysrc} );
</script>
<iframe id="myframe" src="x.php"></iframe>
That sends the data to a page where you can store the src in your session variable.
You need to code that page yourself in asp but in php it would be something like:
<?php
session_start();
$_SESSION['mysrc'] = $_GET['src'];
?>
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Hi,
I am looking for an easy way to transfer a javascript array from one page to another. The page that it is being transferred to will be either POSTed or GETted (hmm, that didn't quite work how I wanted it to) from the previous page.
One way that I have thought of is converting it to a string and sending it over GET, and I found this[^], but I have a few concerns with it. It is firstly a two dimensional array, so I would need to convert that to a string and then convert it back at the other end, the second is security (if it is sent over GET, even on an SSL connection, URL will probably still be visible to someone eves dropping), and third is length (the string could get very long very quickly, and there could become problems if the URL gets too long and messy). That said, I could also devise a way using a hidden form object to send it over POST, so I would probably end up doing it that way.
My question is basically, should I convert it to a string and then parse it back into an array later on, or is there an easier way that I am missing?
Thanks heaps, Josh.
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if security is an issue you can use encryption to encrypt the array. you could look into using AJAX post as well. jQuery is an excellent extension for helping with this and great for beginnners (those who havent delt with creating httprequests before).
I know in PHP you can serialize the array - so maybe there's an equivalent function in javascript?
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Thanks for the reply.
What I am doing as a solution is turning the array into one long string, using AJAX to store it in a PHP session, moving to another page and then having PHP process it when it restores the session.
Basically, the code I am using to turn the array into a string is:
function convertTwoDimensionArrayToString(arrayToConvert) {
arrayAsString = "7"
for (i in arrayToConvert) {
for (j in arrayToConvert[i]) {
arrayAsString += "%%" + arrayToConvert[i][j];
}
}
return arrayAsString;
}
Because it is a two dimensional array, I need to run the for loop twice, but that said, it will put everything into one long, string (obviously). To turn it back into a two dimensional array, I have used the first index (0) to define the array length so the second dimension in every array in this case has a length of 7. I don't know if I explained my logic that well, but it makes sense to me 
This will ONLY work if the second dimension in the array is always the same length (and in my case, it ALWAYS will be, there would be a major flaw in the program if there wasn't). If the second dimension in the array varies in length, I would change the code to separate the different index's of the second array differently to how I would separate the different index's of the first array.
It definitely does work (and it gives me a way to get the array from javascript to php without too problems as well!), but it isn't the most elegant solution. Just thought I would share my solution with others!
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You could send the items of data individually using AJAX if, for example, it is entered into a form and have PHP convert it into the array.
Also, if the amount of data is too long you could encrypt it and store it as an encrypted cookie - so long as it doesn't affect usability if the cookie is deleted (You can pass cookies between javascript and PHP).
Joshua Henderson wrote:
It definitely does work (and it gives me a way to get the array from javascript to php without too problems as well!), but it isn't the most elegant solution.
Depends on you definition of "elegant solution", development speed or short fancy code. Your code looks fine to me anyway. Clean, readable and concise.
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Hi,
I have a web based application writing with asp.net and vb.net,it sends and recieves requests between users and helpdesks,I want check the database and if a new request has already been added to database, show an alert to the helpdesk,I think I should use a conditional update panel and set a timer in that and check for incoming request,but I dont know how to show alert after that!!!
I will be thankfull if anybody could help me..
with regards
modified on Tuesday, August 18, 2009 10:03 AM
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hi all
all what i want to do is to show a confirmation message the user when he try to close the page, if he want to close the page i have some code to execute, but if he decide to stay i want to keep the window open.
i used the following function but it have one issue: when the user click cancel the page get closed
so can you help me and tell what i did wrong
am using IE7
window.onbeforeunload = HandleOnClose;
function HandleOnClose(event)
{
if(currentElement == "" || (!(currentElement.getAttribute("tag")=="DonotCallSaveonLoad")))
{
if(divTimer.style.display != 'none')
{
var objWarningMsg = document.getElementById("<%=hdnCloseWOWarning.ClientID %>").value;
if(objWarningMsg == "False")
{
var objconfirm = confirm("you wont be able to open this quiz again, continue?")
if(objconfirm == true)
{
FunctiontoCallSaveData();
}
else
{
}
}
else
{
FunctiontoCallSaveData();
}
}
else
{
FunctiontoCallSaveData();
}
}
}
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if(objconfirm == true){
FunctiontoCallSaveData();
} else {
return false;
}
I think
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thank but not working
all what it did it gave me another popup with ok and cancel
this should work with normal end users but mine are way below that level 
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Hi!
The code:
window.onbeforeunload = function () {
var conf = window.confirm ("Are you sure you want to navigate away from this page?");
if (conf) {
return false;
} else {
return true;
}
}
Visit this page to get more information about
onbeforeunload event.
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Hello, I am trying to access HTML DOM elements in a remote window using JavaScript and getElementsByTagName but the resultant arrays are undefined.
<pre>
var remoteWin = window.open(URL,'rmtWindow');
remoteTags = remoteWin.document.getElementsByTagName("<tag>");
localTags = self.document.getElementsByTagName("<tag>");
</pre>
This works fine for localTags but not for remoteTags.
Am I not referencing the remote window correctly?
Also there seems to be some inconsistency in returned values:
<pre>
<a href="href URI string" param="hvalue"><img src="img URI string" param="ivalue"></a>
getElementsByTagName("a") returns the full "href URI string" string but getElementsByTagName("img") returns "[object HTMLImageElement]"
</pre>
I want to retrieve and manipulate the actual text strings of these elements, i.e., I want to access "img URI string", "hvalue" and "ivalue". I assume that I need to access properties of "[object HTMLImageElement]" to obtain the strings, including the strings for the optional parameter strings, but where or how do I find the definition of these properties?
Is there a way to associate the returned value for each embedded "img" element with its encapsulating "a" element? It is highly unlikely that the array indicies will match.
[Edit] Is the "img" element a child of the "a" element? If so I can associate them that way.
Thank you for your help, Art
[Edit] Firefox did not complain about this code, just left the values "undefined".
Opera [9.6], throws an exception and says "Security error: attempted to read protected variable".
Yet neither gives me any trouble when I write to a remote window. What's going on???
modified on Tuesday, August 18, 2009 4:56 AM
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Hello,
I am part of a Volunteer Fire Department and have been tasked with coming up with a way to train the members how to properly use their two way radios on the fire scene.
To do this I would like to create a website that shoots out a Scenario to a member sitting in front of the computer with a radio in hand, He must communicate to another member sitting at another computer viewing the same training site. Once the second member receives the message over the radio he would click on a button on the site that would register what message was received and the "Trainer" can score if it was a correct transmitting by what the receiving operator clicked.
This is just a basic explanation of what I want done, I slightly knowledgeable in PHP and HTML but would need some help in designing something like this, I believe storing the information in a database would be the best bet.
Therefore I am looking for someone who is interested in helping the Fire Department to build this web tool.
Please let me know if you are interested in helping with this project, or provide any helpful feedback on the best approach to this project.
Thank You.
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Depending where you are located, you might want to contact your local universty and find out if their computer science department supports "Senior Projects", where a team of senior computer science majors are assigned to you to solve your problem. They are graded on the completed project. Cool idea. The students get a chance to solve a real-world problem and you get a system built for free !
Just an idea ...
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Good Idea but the closest university is about an an hour away and they don't have any web courses or anything offered.
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