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  • Struct in C, are they efficient?

    - by pygabriel
    I'm reading some C code like that: double function( int lena,double xa,double ya, double za, double *acoefs, ..., int lenb,double xb,double yb, double zb, double *bcoefs, ..., same for c, same for d ) This function is called in the code mor than 100.000 times so it's performance-critical. I'm trying to extend this code but I want to know if it's efficient or not (and how much this influences the speed) to encapsulate all the parameters in a struct like this struct PGTO { int len; double x,y,z ; double *acoefs } and then access the parameters in the function.

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  • fcgio.cpp: In destructor 'virtual fcgi_streambuf::~fcgi_streambuf()':

    - by skyeagle
    I am attempting to build fastcgi on a Linux Ubuntu 10.x machine. I run the following commands: ./configure make and I get the following error: fcgio.cpp: In destructor 'virtual fcgi_streambuf::~fcgi_streambuf()': fcgio.cpp:50: error: 'EOF' was not declared in this scope fcgio.cpp: In member function 'virtual int fcgi_streambuf::overflow(int)': fcgio.cpp:70: error: 'EOF' was not declared in this scope fcgio.cpp:75: error: 'EOF' was not declared in this scope fcgio.cpp: In member function 'virtual int fcgi_streambuf::sync()': fcgio.cpp:86: error: 'EOF' was not declared in this scope fcgio.cpp:87: error: 'EOF' was not declared in this scope fcgio.cpp: In member function 'virtual int fcgi_streambuf::underflow()': fcgio.cpp:107: error: 'EOF' was not declared in this scope make[2]: *** [fcgio.lo] Error 1 make[2]: Leaving directory `/somepath/fcgi-2.4.0/libfcgi' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/somepath/fcgi-2.4.0' make: *** [all] Error 2 I notice that others have had the same problem and have asked this question in various fora etc - however, I have not as yet, seen an answer to this question/problem. Has anyone ever managed to build fastcgi on Linux? How do I fix this problem?

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  • Iterator blocks in Clojure?

    - by Checkers
    I am using clojure.contrib.sql to fetch some records from an SQLite database. (defn read-all-foo [] (with-connection *db* (with-query-results res ["select * from foo"] (into [] res)))) Now, I don't really want to realize the whole sequence before returning from the function (i.e. I want to keep it lazy), but if I return res directly or wrap it some kind of lazy wrapper (for example I want to make a certain map transformation on result sequence), SQL-related bindings will be reset and connection will be closed after I return, so realizing the sequence will throw an exception. How can I enclose the whole function in a closure and return a kind of iterator block (like yield in C# or Python)? Or is there another way to return a lazy sequence from this function?

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  • How to convert this jquery code into simple javascript?

    - by metal-gear-solid
    How to convert this jquery code into simple javascript var $jt = jQuery.noConflict(); $jt(function($) { $jt('.tabs a').click(function(){ switch_tabs($jt(this)); return false; }); switch_tabs($jt('.defaulttab')); }); function switch_tabs(obj) { $jt('.tab-content').hide(); $jt('.tabs a').removeClass("selected"); var id = obj.attr("rel"); $jt('#'+id).show(); obj.addClass("selected"); } I want to use same effect without the need of jquery If i remove jquery and place simple javascript , functionality should remain

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  • Multiple records with one request in RESTful system

    - by keithjgrant
    All the examples I've seen regarding a RESTful architecture have dealt with a single record. For example, a GET request to mydomain.com/foo/53 to get foo 53 or a POST to mydomain.com/foo to create a new Foo. But what about multiple records? Being able to request a series of Foos by id or post an array of new Foos generally would be more efficient with a single API request rather than dozens of individual requests. Would you "overload" mydomain.com/foo to handle requests for both a single or multiple records? Or would you add a mydomain.com/foo-multiple to handle plural POSTs and GETs? I'm designing a system that may potentially need to get many records at once (something akin to mydomain.com/foo/53,54,66,86,87) But since I haven't seen any examples of this, I'm wondering if there's something I'm just not getting about a RESTful architecture that makes this approach "wrong".

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  • How to run Javascript code before document is completely loaded (using jQuery)

    - by eliza sahoo
    Hi all, I am sahring atip with you all.Please add on to this discussion. JQuery helps faster page load than javascript. JQuery functions are fired when the related elements are loaded, instead of complete pageload. This is a common practice to call a javascript function when page is loaded like window.onload = function(){ alert("Mindfire") } or Inside of which is the code that we want to run right when the page is loaded. Problematically, however, the Javascript code isn't run until all images are finished downloading (this includes banner ads). The reason for using window.onload in the first place is due to the fact that the HTML 'document' isn't finished loading yet, when you first try to run your code. To circumvent both problems, jQuery has a simple statement that checks the document and waits until it's ready to be manipulated, known as the ready event $(document).ready(function() { // Your code here });

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  • Twitter like status message using jquery...

    - by Pandiya Chendur
    I am using this jquery javascript function to show status message, function topBar(message) { $("<div />", { 'class': 'topbar', text: message }).hide().prependTo("body") .slideDown('fast').delay(4000).slideUp(function() { $(this).remove(); }); } and my css: .topbar { background: #476275; border-bottom: solid 2px #EEE; padding: 3px 0; text-align: center; color: white; font-family:Arial,Helvetica,sans-serif; font-size:135%; font-weight:bold; }? I am getting my status message but what it does it inserts a div within the body tag instead i want the message to display out of the body(z index) exactly like twitter (ie) just flow my message from top and hide it... Any suggestion.... Hope you got my question..

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  • Inserting a rails link into a Google Maps infowindow

    - by Sonia
    Hi, I would like to insert a link into the Google Maps InfoWindow to show more information about the point the user has clicked on in my rails app. My current code: $.getJSON("/places", function(json) { if (json.length > 0) { for (i=0; i<json.length; i++) { var place = json[i]; addLocation(place); } } }); function addLocation(place) { var point = new GLatLng(place.lat, place.lng); var marker = new GMarker(point); map.addOverlay(marker); GEvent.addListener(marker, "click", function() { var info = place.name + "<br>[link]"; map.openInfoWindowHtml(point, info); }); } I would like the link to take the user to the page for that marker (ie. /places/id), but am unsure of how to go about this...any help would be much appreciated!

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  • jquery mouseout problem

    - by From.ME.to.YOU
    hello my html <div id="parent"> <div id="child">cx</div> </div> when i use jquery $('#parent').mouseout(function(){ //something here }); i wonder why when my mouse enter the child div the function fires. i'm still inside parent div. i want that mouseout function to fire only when i leave the parent div not when i'm on any child div http://jsbin.com/esiju/ << example Cheers

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  • How to determine the pat of the current web site

    - by Velika2
    I wanted to create a function which would return the path of the current web site. This is what I thought was working while running in the IDE: Public Shared Function WebsiteAbsoluteBaseUrl() As String Dim RequestObject As System.Web.HttpRequest = HttpContext.Current.Request Return "http://" & RequestObject.Url.Host & ":" & _ RequestObject.Url.Port & "/" & _ RequestObject.Url.Segments(1) End Function Does this seem like it should work? Is there a more straight forward way?

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  • WaitForSingleObject( )

    - by Rakesh Agarwal
    I have got myself stuck into a really amazing issue here.The code is like as below. class A { public: A(){ m_event = CreateEvent(NULL, false, false, NULL); // create an event with initial value as non-signalled m_thread = _beginthread(StaticThreadEntry, 0, this); // create a thread } static void StaticThreadEntry(A * obj) { obj->ThreadEntry(); } void ThreadEntry(); }; void A::ThreadEntry() { WaitforSingleObject(m_event,INFINITE); } int main() { A a; SetEvent(m_event); // sets the event to signalled state which causes the running thread to terminate WaitForSingleObject(m_thread, INFINITE); // waits for the thread to terminate return 0; } Problem : When the above code is run,sometimes( 1 out of 5 ) it hangs and the control gets stuck in the call to WaitforSingleObject()( inside the main function ).The code always calls SetEvent() function to ensure that the thread would terminate before calling Wait() function. I do not see any reason why it should ever hang?

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  • jQuery event handler queue

    - by resopollution
    Overview of the problem In jQuery, the order in which you bind a handler is the order in which they will be executed if you are binding to the same element. For example: $('#div1').bind('click',function(){ // code runs first }); $('#div1').bind('click',function(){ // code runs second }); But what if I want the 2nd bound code to run first? . My current solution Currently, my solution is to modify the event queue: $.data(domElement, 'events')['click'].unshift({ type : 'click', guid : null, namespace : "", data : undefined, handler: function() { // code } }); . Question Is there anything potentially wrong with my solution? Can I safely use null as a value for the guid? Thanks in advance. .

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  • Forcing the Soft Keyboard open

    - by jax
    I am trying to force the Soft Keyboard open in an Activity and grab everything that is entered as I want to handle the input myself, I don't have an EditText. Currently I have tried this but it does not work. I would like the Soft Keyboardto open below mAnswerTextView (Note: it is a TextView not EditText). InputMethodManager mgr = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); // only will trigger it if no physical keyboard is open mgr.showSoftInput(mAnswerTextView, InputMethodManager.SHOW_IMPLICIT); how do I force the Soft Keyboard open How do I gab everything that is entered so that I can handle each character. I would like to flush each character from the imei after I have handled it. ie, the user should not be able to enter whole words in the Soft Keyboard.

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  • asp.net mvc json open dialog box problem

    - by mazhar kaunain baig
    function postForm() { $.ajax({ type: "POST", data: $("#myForm").serialize(), dataType: "json", url: '<%= Url.Action("JSONRequest","Home") %>', success: function(result) { window.alert(result.name); }, error : function() { window.alert('error'); } }); } Html.BeginForm("JSONRequest", "Home", FormMethod.Post, new { id = "myForm" }); Html.TextBox("mazhar") <input type="submit" onclick="postForm" /> Html.EndForm(); public ActionResult JSONRequest(FormCollection form) { string a = form["mazhar"]; var data = new { name = "aaaa", Success = "Record is Succesfully Saved", ErrorMessages = "abc" }; return Json(data); } Ok the problem is that the dialog box is opening after running this code which is asking to save file. Can someone tell me how to resolve this issue?

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  • Javascript ajax asynchronous question...

    - by Polaris878
    Hello, I'm wondering if anyone can help me understand some asynchronous javascript concepts... Say I make an asynch ajax call like so: xmlhttp=new XMLHttpRequest(); xmlhttp.onreadystatechange= myFoo; xmlhttp.open("GET",url,true); Here is my callback function: function myFoo() { if (xmlhttp.readyState==4) { if (xmlhttp.status==200) { // Success message } else { // some error message } } } Now, where and when does the execution path start again? Once I make the call to open(), does execution continue directly below the open() and another "thread" enters the asynch function once the ajax request has been completed? Or, does the browser wait for the request to complete, make the Asynch call, and then execution continues right after the open? Thanks!

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  • Click HTML except one element [ WITHOUT JQuery ]

    - by Tomirammstein
    I show us the code: (function (){ var element = document.getElementById('bar'), hideElement = document.getElementById('foo'), var html = document.getElementsByTagName('html')[0]; tool.onclick = function() { hideElement.style.display = 'block'; html.onclick = function() { hideElement.style.display = 'none'; } } })(); This piece of code work's fine, but, after clicking html, I can not reopen the hidden element. I want to click the html element and give display:none to hideElement, then to click the element id="bar", give to the hidden element display:block, but instead of click the element foo, click the html element. What I can do? Oh, i need help WITHOUT JQUERY, thanks :) EDIT: something like that : click on body except some other tag not working , but without JQuery,

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  • How to set up linux watchdog daemon with Intel 6300esb

    - by ACiD GRiM
    I've been searching for this on Google for sometime now and I have yet to find proper documentation on how to connect the kernel driver for my 6300esb watchdog timer to /dev/watchdog and ensure that watchdog daemon is keeping it alive. I am using RHEL compatible Scientific Linux 6.3 in a KVM virtual machine by the way Below is everything I've tried so far: dmesg|grep 6300 i6300ESB timer: Intel 6300ESB WatchDog Timer Driver v0.04 i6300ESB timer: initialized (0xffffc900008b8000). heartbeat=30 sec (nowayout=0) | ll /dev/watchdog crw-rw----. 1 root root 10, 130 Sep 22 22:25 /dev/watchdog | /etc/watchdog.conf #ping = 172.31.14.1 #ping = 172.26.1.255 #interface = eth0 file = /var/log/messages #change = 1407 # Uncomment to enable test. Setting one of these values to '0' disables it. # These values will hopefully never reboot your machine during normal use # (if your machine is really hung, the loadavg will go much higher than 25) max-load-1 = 24 max-load-5 = 18 max-load-15 = 12 # Note that this is the number of pages! # To get the real size, check how large the pagesize is on your machine. #min-memory = 1 #repair-binary = /usr/sbin/repair #test-binary = #test-timeout = watchdog-device = /dev/watchdog # Defaults compiled into the binary #temperature-device = #max-temperature = 120 # Defaults compiled into the binary #admin = root interval = 10 #logtick = 1 # This greatly decreases the chance that watchdog won't be scheduled before # your machine is really loaded realtime = yes priority = 1 # Check if syslogd is still running by enabling the following line #pidfile = /var/run/syslogd.pid Now maybe I'm not testing it correctly, but I would expecting that stopping the watchdog service would cause the /dev/watchdog to time out after 30 seconds and I should see the host reboot, however this does not happen. Also, here is my config for the KVM vm <!-- WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE OVERWRITTEN AND LOST. Changes to this xml configuration should be made using: virsh edit sl6template or other application using the libvirt API. --> <domain type='kvm'> <name>sl6template</name> <uuid>960d0ac2-2e6a-5efa-87a3-6bb779e15b6a</uuid> <memory unit='KiB'>262144</memory> <currentMemory unit='KiB'>262144</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='x86_64' machine='rhel6.3.0'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <cpu mode='custom' match='exact'> <model fallback='allow'>Westmere</model> <vendor>Intel</vendor> <feature policy='require' name='tm2'/> <feature policy='require' name='est'/> <feature policy='require' name='vmx'/> <feature policy='require' name='ds'/> <feature policy='require' name='smx'/> <feature policy='require' name='ss'/> <feature policy='require' name='vme'/> <feature policy='require' name='dtes64'/> <feature policy='require' name='rdtscp'/> <feature policy='require' name='ht'/> <feature policy='require' name='dca'/> <feature policy='require' name='pbe'/> <feature policy='require' name='tm'/> <feature policy='require' name='pdcm'/> <feature policy='require' name='pdpe1gb'/> <feature policy='require' name='ds_cpl'/> <feature policy='require' name='pclmuldq'/> <feature policy='require' name='xtpr'/> <feature policy='require' name='acpi'/> <feature policy='require' name='monitor'/> <feature policy='require' name='aes'/> </cpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/mnt/data/vms/sl6template.img'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> <controller type='usb' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <interface type='bridge'> <mac address='52:54:00:44:57:f6'/> <source bridge='br0.2'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <interface type='bridge'> <mac address='52:54:00:88:0f:42'/> <source bridge='br1'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <watchdog model='i6300esb' action='reset'> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </watchdog> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> </domain> Any help is appreciated as the most I've found are patches to kvm and general softdog documentation or IPMI watchdog answers.

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  • Call server side method from JSON

    - by Zerotoinfinite
    How to call a method on a server side from JSON. Below is the code I am using SERVER SIDE: [WebMethod] private void GetCustomer( string NoOfRecords) { string connString = "Data Source=Something;Initial Catalog=AdventureWorks;Trusted_Connection=True;"; SqlConnection sCon = new SqlConnection(connString); SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM Sales.Customer WHERE CustomerID < '" + NoOfRecords+ "' ", sCon); DataSet ds = new DataSet(); da.Fill(ds); GvDetails.DataSource = ds.Tables[0]; GvDetails.DataBind(); } On Client Side: var txtID = document.getElementById('txtValue'); $.ajax({ type: "POST", url: "Default.aspx/GetCustomer", data: "{Seconds:'" + txtID +"'}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(response) { alert(response); } }); Now I want that on button click, I would call the function at the client side [JSON], which pass the textbox value to the function. Please help

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  • Pattern for managing reference count and object life

    - by Gopalakrishnan Subramani
    We have a serial port which is connected to hundreds of physical devices on the same wire. We have protocols like Modbus and Hart to handle the request and response between the application and devices. The question is related to managing the reference count of the channel. When no device is using the channel, the channel should be closed. public class SerialPortChannel { int refCount = 0; public void AddReference() { refCount++; } public void ReleaseReference() { refCount--; if (refCount <= 0) this.ReleasePort(); //This close the serial port } } For each device connected, we create a object for the device like device = new Device(); device.Attach(channel); //this calls channel.AddReference() When the device disconnect, device.Detach(channel); //this calls channel.ReleaseReference() I am not convinced by the reference count model. Are there any better way to handle this problem in .NET World?

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  • Do jQuery and JavaScript have different namespaces?

    - by Brett
    I have this code in jQuery.. $(document).ready(function(){ var fieldCounter = 0; ... I have a jQuery function that increments this value. This works, but I can't access this value on the page from a non-jQuery function? The reverse is also true, if I scope it in JavaScript e.g. <script type="text/javascript"> var fieldCounter = 0; I can access it from javascript but jQuery can't view it? I'm probably doing something really dumb?

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  • Insert Comment Reply Form Into Page Using Jquery

    - by Joe
    I have been making a threaded comment system as a way to learn php and javascript/jquery properly. Ive done bits and bobs in the past but ive made a new years resolution to learn it properly. Im having trouble inserting a reply form into the comment tree below the comment being replied to. I know this is probably pretty basic but how do you insert html into a page when someone clicks a link. This code wasn't working for me: $(document).ready(function(){ $(function() { $('a#reply').click(function() { $(this).append("the html blah"); }); }); }); Anyone see where im going wrong?

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  • Get all window handles for a process

    - by Jeremy
    Using Microsoft Spy++, I can see that the following windows that belong to a process: Process XYZ window handles, displayed in tree form just like Spy++ gives me: A B C D E F G H I J K I can get the process, and the MainWindowHandle property points to the handle for window F. If I enumerate the child windows using I can get a list of window handles for G through K, but I can't figure out how to find the window handles for A through D. How can I enumerate windows that are not children of the handle specified by MainWindowHandle of the Process object? To enumerate I'm using the win32 call: [System.Runtime.InteropServices.DllImport(strUSER32DLL)] public static extern int EnumChildWindows(IntPtr hWnd, WindowCallBack pEnumWindowCallback, int iLParam);

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  • Binomial test in Python

    - by Morlock
    I need to do a binomial test in Python that allows calculation for 'n' numbers of the order of 10000. I have implemented a quick binomial_test function using scipy.misc.comb, however, it is pretty much limited around n = 1000, I guess because it reaches the biggest representable number while computing factorials or the combinatorial itself. Here is my function: from scipy.misc import comb def binomial_test(n, k): """Calculate binomial probability """ p = comb(n, k) * 0.5**k * 0.5**(n-k) return p How could I use a native python (or numpy, scipy...) function in order to calculate that binomial probability? If possible, I need scipy 0.7.2 compatible code. Many thanks!

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  • Need help with cycle in JS

    - by antiarchitect
    I have such function, that adds a grid of droppables: function AddClassroomDrops(grid, weeks, days, times) { for(week = 1; week <= weeks; week++) { for (day = 1; day <= days; day++) { for (time = 1; time <= times; time++ ) { Droppables.add('container_grid'+ grid + '_week' + week + '_day' + day + '_time' + time, { accept: 'pair', hoverclass : 'hovered_receiver', onDrop: function(pair, receiver) { new Ajax.Request( '/pairs/'+pair.id+'/update_on_drop', { method : 'put', parameters : { classroom : grid, week : week, day : day, time : time, container : receiver.id } } ); } }); } } } } The problem is that params of Ajax.Request (week, day, time) are always equal to weeks + 1, times + 1, days + 1. But they must vary according to the cycle.

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  • Embedding an existing exe file into another C++ program

    - by Milad
    Is there a way to link an existing .exe file with other C++ source files during compilation? What I'm actually trying to do is to compress and decompress some files in my console program using LZMA(7zip) SDK but unfortunately it's very difficult to use for a newbie. There is a command line version of LZMA called 7za.exe and I am wondering if I can somehow embed it into my program and use it like a function. It can be easily used with system() function (which seems to be a very dangerous thing to use) but then if I send my program to someone who doesn't have 7za.exe in the right folder it won't work. I came across CreateProcess() function in windows.h header files but it seems to achieve what system() does in a more proper and advanced way. I don't know if it can actually link the exe file like an object file during compilation

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