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  • dynamically created radiobuttonlist

    - by Janet
    Have a master page. The content page has a list with hyperlinks containing request variables. You click on one of the links to go to the page containing the radiobuttonlist (maybe). First problem: When I get to the new page, I use one of the variables to determine whether to add a radiobuttonlist to a placeholder on the page. I tried to do it in page)_load but then couldn't get the values selected. When I played around doing it in preInit, the first time the page is there, I can't get to the page's controls. (Object reference not set to an instance of an object.) I think it has something to do with the MasterPage and page content? The controls aren't instantiated until later? (using vb by the way) Second problem: Say I get that to work, once I hit a button, can I still access the passed request variable to determine the selected item in the radiobuttonlist? Protected Sub Page_PreInit(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreInit 'get sessions for concurrent Dim Master As New MasterPage Master = Me.Master Dim myContent As ContentPlaceHolder = CType(Page.Master.FindControl("ContentPlaceHolder1"), ContentPlaceHolder) If Request("str") = "1" Then Dim myList As dsSql = New dsSql() ''''instantiate the function to get dataset Dim ds As New Data.DataSet ds = myList.dsConSessionTimes(Request("eid")) If ds.Tables("conSessionTimes").Rows.Count > 0 Then Dim conY As Integer = 1 CType(myContent.FindControl("lblSidCount"), Label).Text = ds.Tables("conSessionTimes").Rows.Count.ToString Sorry to be so needy - but maybe someone could direct me to a page with examples? Maybe seeing it would help it make sense? Thanks....JB

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  • How to access values of dynamically created TextBoxes

    - by SAMIR BHOGAYTA
    If one adds controls dynamically to a page and wants to get their information after PostBack, one needs to recreate these elements after the PostBack. Let's consider the following idea: First you create some controls: for(int i=0;i TextBox objBox = new TextBox(); objBox.ID = "objBox" + i.ToString(); this.Page.Controls.Add(objBox); } After PostBack, you want to retrieve the text entered in the third TextBox. If you try this: String strText = objBox2.Text; you'll receive an exception. Why? Because the boxes have not been created again and the local variable objBox2 simply not exists. How to retrieve the Box? You'll need to recreate the box by using the code above. Then, you may try to get its value by using the following code: TextBox objBox2; objBox2 = this.Page.FindControl("objBox2") as TextBox; if(objBox2 != null) Response.Write(objBox2.Text);

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  • How to create dynamically LinkButton with Literal Control in ASP.NET

    - by SAMIR BHOGAYTA
    Step 1 : First take following control into the .aspx page. asp:UpdatePanel id="up1" runat="server" contenttemplate asp:Literal ID="lt1" Text="" runat="server" asp:PlaceHolder ID="ph1" runat="server" /asp:PlaceHolder /contenttemplate /asp:UpdatePanel Step 2 : string query = query for fill the dataset; DataSet ds = new DataSet(); ds = pass the query to retrive data; int i = 0; LinkButton lt = new LinkButton(); for (i = 0; i { lt = new LinkButton(); lt.ID = "link" + i.ToString(); lt.Text = ds.Tables[0].Rows[i].ItemArray[1].ToString(); ph1.Controls.Add(lt); ph1.Controls.Add(new LiteralControl(" ")); }

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  • Problem with dynamically added script element - attribute src is empty

    - by Stazh
    Hi there, I have a problem with dynamically added script element (using jQuery). Code for adding new script element to DOM is this: var pScript = document.createElement("script"); pScript.type = "text/javascript"; pScript.src = sFile; // Add element to the end of head element $("head").append(pScript); The script is added with no problem, and the code runs perfectly. But, the problem occurs when I try to find the newly added script. I use this code to iterate through all script elements: var bAdd = true; $("script").each(function() { if(this.src == sFile) bAdd = false; }); (I need this code to prevent adding script that is already loaded) Problem is that all other script elements have src attribute set, but the newly added (dynamically) has not... Any idea?

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  • Unhandled exception when DataTemplate created dynamically using Silverlight 3.0

    - by user333397
    Requirement is to create a reusable multi-select combobox custom control. To accomplish this, I am creating the DataTemplate dynamically through code and set the combobox ItemTemplate. I am able to load the datatemplate dynamically and set the ItemTemplate, but getting unhandled exception (code: 7054) when we select the combobox. Here is the code Class MultiSelCombBox: ComboBox { public override void OnApplyTemplate() { base.OnApplyTemplate(); CreateTemplate(); } void CreateTemplate() { DataTemplate dt = null; if (CreateItemTemplate) { if (string.IsNullOrEmpty(CheckBoxBind)) { dt = XamlReader.Load(@"<DataTemplate xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' x:Name=""DropDownTemplate""><Grid xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' x:Name=""CheckboxGrid""><TextBox xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' x:Name=""test"" xml:space=""preserve"" Text='{Binding " + TextContent + "}'/></Grid></DataTemplate>") as DataTemplate; this.ItemTemplate = dt; } } } //Other code goes here }} what am i doing wrong? suggestion?

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  • Best way to dynamically get column names from oracle tables

    - by MNC
    Hi, We are using an extractor application that will export data from the database to csv files. Based on some condition variable it extracts data from different tables, and for some conditions we have to use UNION ALL as the data has to be extracted from more than one table. So to satisfy the UNION ALL condition we are using nulls to match the number of columns. Right now all the queries in the system are pre-built based on the condition variable. The problem is whenever there is change in the table projection (i.e new column added, existing column modified, column dropped) we have to manually change the code in the application. Can you please give some suggestions how to extract the column names dynamically so that any changes in the table structure do not require change in the code? My concern is the condition that decides which table to query. The variable condition is like if the condition is A, then load from TableX if the condition is B then load from TableA and TableY. We must know from which table we need to get data. Once we know the table it is straightforward to query the column names from the data dictionary. But there is one more condition, which is that some columns need to be excluded, and these columns are different for each table. I am trying to solve the problem only for dynamically generating the list columns. But my manager told me to make solution on the conceptual level rather than just fixing. This is a very big system with providers and consumers constantly loading and consuming data. So he wanted solution that can be general. So what is the best way for storing condition, tablename, excluded columns? One way is storing in database. Are there any other ways? If yes what is the best? As I have to give at least a couple of ideas before finalizing. Thanks,

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  • dynamically set the control template

    - by Saboor
    hi, i am using dictionaries in WPF. i have two bitmap image in it with name something like image1 and image2 now in forms, i like to set them to single image control depending on condition, some times image1 and sometimes image2. so how i set the source dynamically, in dictonary i have UriSource="/wpf1;component/images/infobarGreen.png" / UriSource="/wpf1;component/images/infobarRed.png" /

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  • dynamically bound elements don't subscribe to CSS rules

    - by user961627
    I'm using ajax to dynamically populate a menu. The problem is the dynamically created elements do not follow the CSS rules, although they're created with the right classname. This is surprising. Here's my HTML: <div id='menu1'> <ul class='menu'> <?php $sql = /// /* some sql string, which works */ $result = mysql_query($sql); while($row = mysql_fetch_array( $result )) { $prod_id = $row['product_id']; $prod_name = $row['product_name']; echo "<li data-title='$prod_id' class='menu1_item'>".$prod_name."</li> "; } ?> </ul> </div> <div id='menu2'> <ul class='menu'> </ul> </div> <div id='menu3'> <ul class='menu'> </ul> </div> Here's my jquery: $(".menu1_item").click( function() { $.ajax({ type: "POST", data: { m: '2', id: $(this).attr('data-title') }, url: "fetch_designs.php", success: function(msg){ if (msg != ''){ $("#menu2").html(msg).show(); $(".menu2_item").bind('click',function() { $.ajax({ type: "POST", data: { m: '3', id: $(this).attr('data-title') }, url: "fetch_designs.php", success: function(msg){ if (msg != ''){ $("#menu3").html(msg).show(); } } }); //end menu2 click }); //end if } //end success } }); //end menu1 click }); My CSS is as follows: ul.menu li { cursor:pointer; list-style: none; } #menu1, #menu2, #menu3 { margin:50px; position:relative; display:block; float:left; } .menu1-item .menu2-item .menu3-item { padding:4px; background-color:lightgray; color:black; cursor:pointer; }

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  • Dynamically create controls using stringbuilder

    - by Shrewdy
    hi, i have been trying to create controls dynamically on my web page using the StringBuilder class..and i dont quite seem to get through... any help would be appreciated. i am trying to do this... StringBuilder sbTest = new StringBuilder(string.Empty); sbTest.Append("<input type=\"text\" id=\"txt1\" runat=\"server\" />"); Response.Write(sbTest.ToString()); The page for sure displays a TextBox on the browser which is easily accessible through JavaScript...but what i want is the control to be available on the Server Side too...so that when the page is posted back to the server i can easliy obtain the value that has been entered by the user into the textbox. Can any 1 please help me with this.... thank you so much....

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  • Dynamically Loading Google Maps api's

    - by ido
    Hi, Im trying to load the google maps api's dynamically. I'm using the following code: var head= document.getElementsByTagName('head')[0]; var script= document.createElement('script'); script.type= 'text/javascript'; script.src= 'http://www.google.com/jsapi?key=<MY_KEY>; head.appendChild(script); but when trying to create the map map = new GMap2(document.getElementById("map")); or map = new google.maps.Map2(document.getElementById("map")); I'm getting an error that google (or GMap2) is undefined.

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  • How can i create a submitable form that contains dynamically added and removed controls

    - by bill
    Hi All, I am trying to create a form that is made up of controls with values that represent an entity with multiple child entities. The form will represent a product with multiple properties where the user will then be able to create options with multiple properties which in turn be able to create multiple option-items with multiple properties. My question is what is the best approach? Can i use ajax to avoid postbacks and having to rewrite the controls to the page? If i dynamically add the controls in the form of table rows or grid rows will the data/control values be available in the code-behind when i submit? This is an age old question.. the last time i had to do this was .Net 2.0, pre-ajax (for me) and i was forced to recreate all the controls on each post back. thanks!

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  • Accessing controls created dynamically (c#)

    - by Aliens
    In my code behind (c#) I dynamically created some RadioButtonLists with more RadioButtons in each of them. I put all controls to a specific Panel. What I need to know is how to access those controls later as they are not created in .aspx file (with drag and drop from toolbox)? I tried this: foreach (Control child in panel.Controls) { Response.Write("test1"); if (child.GetType().ToString().Equals("System.Web.UI.WebControls.RadioButtonList")) { RadioButtonList r = (RadioButtonList)child; Response.Write("test2"); } } "test1" and "test2" dont show up in my page. That means something is wrong with this logic. Any suggestions what could I do?

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  • Learning to implement dynamically typed language compiler

    - by TriArc
    I'm interested in learning how to create a compiler for a dynamically typed language. Most compiler books, college courses and articles/tutorials I've come across are specifically for statically typed languages. I've thought of a few ways to do it, but I'd like to know how it's usually done. I know type inferencing is a pretty common strategy, but what about others? Where can I find out more about how to create a dynamically typed language? Edit 1: I meant dynamically typed. Sorry about the confusion. I've written toy compilers for statically typed languages and written some interpreters for dynamically typed languages. Now, I'm interested in learning more about creating compilers for a dynamically typed language. I'm specifically experimenting with LLVM and since I need to specify the type of every method and argument, I'm thinking of ways to implement a dynamically typed language on something like LLVM.

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  • How to add an image dynamically at runtime in java

    - by Brandon
    I've been trying to load up an image dynamically in runtime for the longest time and have taken a look at other posts on this site and have yet to find exactly the thing that will work. I am trying to load an image while my GUI is running (making it in runtime) and have tried various things. Right now, I have found the easiest way to create an image is to use a JLabel and add an ImageIcon to it. This has worked, but when I go to load it after the GUI is running, it fails saying there is a "NullPointerException". Here is the code I have so far: p = Runtime.getRuntime().exec("python C:\\FaceVACS\\roc.py " + "C:/FaceVACS/OutputCMC_" + target + ".txt " + "C:/FaceVACS/ROC_" + target + ".png"); Icon graph = new ImageIcon("C:\\FaceVACS\\OutputCMC_" + target + ".png"); roc_image.setIcon(graph); panel.add(roc_image); panel.revalidate(); gui.frame.pack(); I tried panel.validate(), panel.revalidate(), and I've also tried gui.getRootPane(), but I can't seem to find anything that will work. Any ideas would be helpful! Thanks

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  • jquery performing calculation on dynamically generated elements

    - by user306472
    I have a table made up of a row of 3 input elements: Price, Quanity, and Total. Under that, I have two links I can click to dynamically generate another row in the table. All that is working well, but actually calculating a value for the total element is giving me trouble. I know how to calculate the value of the first total element but I'm having trouble extending this functionality when I add a new row to the table. Here's the html: <table id="table" border="0"> <thead> <th>Price</th><th>Quantity</th><th>Total</th> </thead> <tbody> <tr> <td><input id ="price" type = "text"></input></td> <td><input id ="quantity" type = "text"></input></td> <td><input id ="total" type = "text"></input></td> </tr> </tbody> </table> <a href="#" id="add">Add New</a> <a href="#" id="remove">Remove</a> Here's the jquery I'm using: $(function(){ $('a#add').click(function(){ $('#table > tbody').append('<tr><td><input id ="price" type = "text"></input></td><td><input id ="quantity" type = "text"></input></td><td><input id ="total" type = "text"></input></td></tr>'); }); $('a#remove').click(function(){ $('#table > tbody > tr:last').remove(); }); }); $(function(){ $('a#calc').click(function(){ var q = $('input#quantity').val(); var p = $('input#price').val(); var tot = (q*p); $('input#total').val(tot); }); }); I'm new to jquery so there's probably a simple method I don't know about that selects the relevant fields I want to calculate. Any guidance would be greatly appreciated.

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  • dynamically include zipfilesets into a WAR

    - by Konstantin
    hi all - a bit of clumsy situation but for the moment we cannot migrate to more straight-forward project layout. We have a project called myServices and it has 2 source folders (yes, I know, but that's the way it is for now) - I'm trying to make build process a bit more flexible so we now have a property called artifact.names that will be parsed by generic build.xml and based on name, it will call either jar or war task, eg. myService-war will create a WAR file with the following zipfilesets included there: myService-war-classes, myService-war-web-inf, myService-war-meta-inf. I want to add a bit more flexibility, and allow having additional zipfilesets, eg. myService-war-etc-1,2 etc - so these will be picked up by the package target automatically. I cannot use "if" inside war target, and also ${ant.refid:myService-war-classes} property is not resolved, so I'm kind of stuck at the moment with my options - how do I dynamically include a zipfileset into a WAR? You can refer to fileset by id, but it MUST be defined then, eg. you can't have it optional on project level. Thank you. Some build.xml snippets: <target name="archive"> <for list="${artifact.names}" param="artifact"> <sequential> <echo>Packaging artifact @{artifact} of project ${project.name}</echo> <property name="display.@{artifact}.packaging" refid="@{artifact}.packaging" /> <echo>${display.@{artifact}.packaging}</echo> <propertyregex property="@{artifact}.archive.type" input="@{artifact}" regexp="([a-zA-Z0-9]*)(\-)([ejw]ar)" select="\3" casesensitive="false"/> <propertyregex property="@{artifact}.base.name" input="@{artifact}" regexp="([a-zA-Z0-9]*)(\-)([ejw]ar)" select="\1" casesensitive="false"/> <echo>${@{artifact}.archive.type}</echo> <if> <then> <war destfile="${jar.dir}/${@{artifact}.base.name}.war" compress="true" needxmlfile="false"> <resources refid="@{artifact}.packaging" /> <zipfileset refid="@{artifact}-classes" erroronmissingdir="false" /> <zipfileset refid="@{artifact}-meta-inf" erroronmissingdir="false" /> <zipfileset refid="@{artifact}-web-inf" erroronmissingdir="false" /> <!-- Additional zipfilesets to package --> <zipfileset refid="@{artifact}-etc-2" erroronmissingdir="false" /> <zipfileset refid="@{artifact}-etc-3" erroronmissingdir="false" /> <zipfileset refid="@{artifact}-etc-4" erroronmissingdir="false" /> <zipfileset refid="@{artifact}-etc-5" erroronmissingdir="false" /> <zipfileset refid="@{artifact}-etc-6" erroronmissingdir="false" /> <zipfileset refid="@{artifact}-etc-7" erroronmissingdir="false" /> <zipfileset refid="@{artifact}-etc-8" erroronmissingdir="false" /> <zipfileset refid="@{artifact}-etc-9" erroronmissingdir="false" /> <zipfileset refid="@{artifact}-etc-10" erroronmissingdir="false" /> </war> </then> <!-- Generic JAR packaging --> <else> <jar destfile="${jar.dir}/@{artifact}.jar" compress="true"> <resources refid="@{artifact}.packaging" /> <zipfileset refid="@{artifact}-meta-inf" erroronmissingdir="false" /> </jar> </else> </if> </sequential> </for> </target>

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  • Debugging dynamically added Javascript code

    - by gilm
    One of the programmers I worked with has something similar in code: var head = document.getElementsByTagName("head")[0]; var e = document.createElement("script"); e.type = "text/javascript"; var b = "function moo() { alert('hello'); }"; e.appendChild(document.createTextNode(b)); head.appendChild(e); moo(); This is all good and dandy, but I would like to step into moo(), and firebug just can't do that. I know I can rip the whole thing apart, but I reallllly don't want to touch it and his code works :) Any ideas how I can debug this with Firebug? Cheers

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  • Dynamically adding meta tags using php

    - by rekhasathvika
    Hi, In my site I have a list of categories and I have to put meta keywords and description for them.I have a single page where I will retrieve the categories from the database. Can anyone tell me how to make this much simpler to put meta tags for all the categories. Regards, Rekha http://hiox.org

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  • dynamically create sitemap xml using php

    - by rekhasathvika
    Hi, I have created sitemap for my site using some reference code in the below link http://stackoverflow.com/questions/2747801/creating-an-xml-sitemap-with-php But I am getting error as XML Parsing Error: undefined entity Location: as my content is as follows << alt attribute and it says something like < loc http://www.example.com/700- & laquo;alt & raquo;-attributes-in-images.php< /loc Can anyone tell me how to get rid of this error.

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  • Loading Views dynamically

    - by Dann
    Case 1: I have created View-based sample application and tried execute below code. When I press on "Job List" button it should load another view having "Back Btn" on it. In test function, if I use [self.navigationController pushViewController:jbc animated:YES]; nothing gets loaded, but if I use [self presentModalViewController:jbc animated:YES]; it loads another view haveing "Back Btn" on it. Case 2: I did create another Navigation Based Applicaton and used [self.navigationController pushViewController:jbc animated:YES]; it worked as I wanted. Can someone please explain why it was not working in Case 1. Does it has something to do with type of project that is selected? @interface MWViewController : UIViewController { } -(void) test; @end @interface JobViewCtrl : UIViewController { } @end @implementation MWViewController (void)viewDidLoad { UIButton* btn = [UIButton buttonWithType:UIButtonTypeRoundedRect]; btn.frame = CGRectMake(80, 170, 150, 35); [btn setTitle:@"Job List!" forState:UIControlStateNormal]; [btn addTarget:self action:@selector(test) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:btn]; [super viewDidLoad]; } -(void) test { JobViewCtrl* jbc = [[JobViewCtrl alloc] init]; [self.navigationController pushViewController:jbc animated:YES]; //[self presentModalViewController:jbc animated:YES]; [jbc release]; } (void)dealloc { [super dealloc]; } @end @implementation JobViewCtrl -(void) loadView { self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]; self.view.backgroundColor = [UIColor grayColor]; UIButton* btn = [UIButton buttonWithType:UIButtonTypeRoundedRect]; btn.frame = CGRectMake(80, 170, 150, 35); [btn setTitle:@"Back Btn!" forState:UIControlStateNormal]; [self.view addSubview:btn]; } @end

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  • Create controls dynamically

    - by Afnan
    I want to know if this is possible in c# winform. create control when ever button is pressed and place it at given location. I think it is possible like this private TextBox txtBox = new TextBox(); private Button btnAdd = new Button(); private ListBox lstBox = new ListBox(); private CheckBox chkBox = new CheckBox(); private Label lblCount = new Label(); but the problem lies when ever button is pressed same name controls are created.How to avoid that

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  • WPF - Dynamically access a specific item of a collection in XAML

    - by Andy T
    Hi, I have a data source ('SampleAppearanceDefinitions'), which holds a single collection ('Definitions'). Each item in the collection has several properties, including Color, which is what I'm interested in here. I want, in XAML, to display the Color of a particular item in the collection as text. I can do this just fine using this code below... Text="{Binding Source={StaticResource SampleAppearanceDefinitions}, Path=Definitions[0].Color}" The only problem is, this requires me to hard-code the index of the item in the Definitions collection (I've used 0 in the example above). What I want to do in fact is to get that value from a property in my current DataContext ('AppearanceID'). One might imagine the correct code to look like this.... Text="{Binding Source={StaticResource SampleAppearanceDefinitions}, Path=Definitions[{Binding AppearanceID}].Color}" ...but of course, this is wrong. Can anyone tell me what the correct way to do this is? Is it possible in XAML only? It feels like it ought to be, but I can't work out or find how to do it. Any help would be greatly appreciated! Thanks! AT

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  • Access cost of dynamically created objects with dynamically allocated members

    - by user343547
    I'm building an application which will have dynamic allocated objects of type A each with a dynamically allocated member (v) similar to the below class class A { int a; int b; int* v; }; where: The memory for v will be allocated in the constructor. v will be allocated once when an object of type A is created and will never need to be resized. The size of v will vary across all instances of A. The application will potentially have a huge number of such objects and mostly need to stream a large number of these objects through the CPU but only need to perform very simple computations on the members variables. Could having v dynamically allocated could mean that an instance of A and its member v are not located together in memory? What tools and techniques can be used to test if this fragmentation is a performance bottleneck? If such fragmentation is a performance issue, are there any techniques that could allow A and v to allocated in a continuous region of memory? Or are there any techniques to aid memory access such as pre-fetching scheme? for example get an object of type A operate on the other member variables whilst pre-fetching v. If the size of v or an acceptable maximum size could be known at compile time would replacing v with a fixed sized array like int v[max_length] lead to better performance? The target platforms are standard desktop machines with x86/AMD64 processors, Windows or Linux OSes and compiled using either GCC or MSVC compilers.

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