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  • Javascript comma operator

    - by Claudiu
    When combining assignment with comma (something that you shouldn't do, probably), how does javascript determine which value is assigned? Consider these two snippets: function nl(x) { document.write(x + "<br>"); } var i = 0; nl(i+=1, i+=1, i+=1, i+=1); nl(i); And: function nl(x) { document.write(x + "<br>"); } var i = 0; nl((i+=1, i+=1, i+=1, i+=1)); nl(i); The first outputs 1 4 while the second outputs 4 4 What are the parentheses doing here?

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  • Non-linear regression models in PostgreSQL using R

    - by Dave Jarvis
    Background I have climate data (temperature, precipitation, snow depth) for all of Canada between 1900 and 2009. I have written a basic website and the simplest page allows users to choose category and city. They then get back a very simple report (without the parameters and calculations section): The primary purpose of the web application is to provide a simple user interface so that the general public can explore the data in meaningful ways. (A list of numbers is not meaningful to the general public, nor is a website that provides too many inputs.) The secondary purpose of the application is to provide climatologists and other scientists with deeper ways to view the data. (Using too many inputs, of course.) Tool Set The database is PostgreSQL with R (mostly) installed. The reports are written using iReport and generated using JasperReports. Poor Model Choice Currently, a linear regression model is applied against annual averages of daily data. The linear regression model is calculated within a PostgreSQL function as follows: SELECT regr_slope( amount, year_taken ), regr_intercept( amount, year_taken ), corr( amount, year_taken ) FROM temp_regression INTO STRICT slope, intercept, correlation; The results are returned to JasperReports using: SELECT year_taken, amount, year_taken * slope + intercept, slope, intercept, correlation, total_measurements INTO result; JasperReports calls into PostgreSQL using the following parameterized analysis function: SELECT year_taken, amount, measurements, regression_line, slope, intercept, correlation, total_measurements, execute_time FROM climate.analysis( $P{CityId}, $P{Elevation1}, $P{Elevation2}, $P{Radius}, $P{CategoryId}, $P{Year1}, $P{Year2} ) ORDER BY year_taken This is not an optimal solution because it gives the false impression that the climate is changing at a slow, but steady rate. Questions Using functions that take two parameters (e.g., year [X] and amount [Y]), such as PostgreSQL's regr_slope: What is a better regression model to apply? What CPAN-R packages provide such models? (Installable, ideally, using apt-get.) How can the R functions be called within a PostgreSQL function? If no such functions exist: What parameters should I try to obtain for functions that will produce the desired fit? How would you recommend showing the best fit curve? Keep in mind that this is a web app for use by the general public. If the only way to analyse the data is from an R shell, then the purpose has been defeated. (I know this is not the case for most R functions I have looked at so far.) Thank you!

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  • Save scrollbar Div, in a MasterPage

    - by Luis
    have got succesfull done it in the content pages, but in the masterpage, I am not able to done it. I tried this way, it was like I did for content pages. <script type="text/javascript"> // This Script is used to maintain Grid Scroll on Partial Postback var scrollTop; //Register Begin Request and End Request Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(BeginRequestHandler); Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler); //Get The Div Scroll Position function BeginRequestHandler(sender, args) { var m = document.getElementById('<%=PanelMenuLeft.ClientID%>'); m.scrollTop = scrollTop; } //Set The Div Scroll Position function EndRequestHandler(sender, args) { var m = document.getElementById('<%=PanelMenuLeft.ClientID%>'); m.scrollTop = scrollTop; } </script>

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  • JS Anonymous Scope...

    - by Simon
    this Application.EventManager.on('Click', function(args) { // event listener, args is JSON TestAction.getContents(args.node.id, function(result, e) { console.log(result); this.add({ title: args.node.id, html: result }).show(); }); }); I'm really struggling with scope and anonymous functions... I want this (on the 1st line) to be the same object as this (on the 5th line)... .call() and .apply() seemed to be the right sort of idea but I don't want to trigger the event... just change it's scope.... For a bit of contexts... the this in question is a TabContainer and TestAction is a RPC that returns content... Thanks....

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  • M a java developer struggling with jQuery :(

    - by Mustafa
    Guys i am very new to jQuery.I have started using the auto complete feature.What i want is while i click on an item provided by the auto complete the page should submit to another page.I am using : $().ready(function() { $("#name").autocomplete("contacts.jsp"); $("#name").result(function(event, data, formatted) { if (data) $(this).parent().next().find("input").val(data[1]); }); $("#name").setOptions({ mustMatch : false, max: 8, onClick:selectItem, autoFill: false }); }); And this gives me good data like :Aditi XaveirAsif Garhietc for 'A'Now what i want is on clicking Aditi Xaveir, the page should submit to AditiXaveir's profile page.How do i do that?

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  • drag and drop working funny when using variable draggables and droppables

    - by Lina
    Hi, i have some containers that contain some divs like: <div id="container1"> <div id="task1" onMouseOver="DragDrop("+1+");">&nbsp;</div> <div id="task2" onMouseOver="DragDrop("+2+");">&nbsp;</div> <div id="task3" onMouseOver="DragDrop("+3+");">&nbsp;</div> <div id="task4" onMouseOver="DragDrop("+4+");">&nbsp;</div> </div> <div id="container2"> <div id="task5" onMouseOver="DragDrop("+5+");">&nbsp;</div> <div id="task6" onMouseOver="DragDrop("+6+");">&nbsp;</div> </div> <div id="container3"> <div id="task7" onMouseOver="DragDrop("+7+");">&nbsp;</div> <div id="task8" onMouseOver="DragDrop("+8+");">&nbsp;</div> <div id="task9" onMouseOver="DragDrop("+9+");">&nbsp;</div> <div id="task10" onMouseOver="DragDrop("+10+");">&nbsp;</div> </div> i'm trying to drag tasks and drop them in one of the container divs, then reposition the dropped task so that it doesn't affect the other divs nor fall outside one of them and to do that i'm using the event onMouseOver to call the following function: function DragDrop(id) { $("#task" + id).draggable({ revert: 'invalid' }); for (var i = 0; i < nameList.length; i++) { $("#" + nameList[i]).droppable({ drop: function (ev, ui) { var pos = $("#task" + id).position(); if (pos.left <= 0) { $("#task" + id).css("left", "5px"); } else { var day = parseInt(parseInt(pos.left) / 42); var leftPos = (day * 42) + 5; $("#task" + id).css("left", "" + leftPos + "px"); } } }); } } where: nameList = [container1, container2, container3]; the drag is working fine, but the drop is not really, it's just a mess! any help please?? when i hardcode the id and the container, then it works beautifully, but as soon as i use id in drop then it begins to work funny! any suggestions??? thanks a million in advance Lina

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  • Insert element into a tree from a list in Standard ML

    - by vichet
    I have just started to learn SML on my own and get stuck with a question from the tutorial. Let say I have: tree data type datatype node of (tree*int*tree) | null insert function fun insert (newItem, null) = node (null, newItem, null) | insert (newItem, node (left, oldItem, right)) = if (newItem <= oldItem) then node (insert(newItem,left),oldItem, right) else node (left, oldItem, insert(newItem, right) an integer list val intList = [19,23,21,100,2]; my question is how can I add write a function to loop through each element in the list and add to a tree? Your answer is really appreciated.

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  • Find the minimum gap between two numbers in an AVL tree

    - by user1656647
    I have a data structures homework, that in addition to the regular AVL tree functions, I have to add a function that returns the minimum gap between any two numbers in the AVL tree (the nodes in the AVL actually represent numbers.) Lets say we have the numbers (as nodes) 1 5 12 20 23 21 in the AVL tree, the function should return the minimum gap between any two numbers. In this situation it should return "1" which is |20-21| or |21-20|. It should be done in O(1). Tried to think alot about it, and I know there is a trick but just couldn't find it, I have spent hours on this. There was another task which is to find the maximum gap, which is easy, it is the difference between the minimal and maximal number.

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  • How to recognize touch events and control a script object inside UIWebView?

    - by Markus S.
    Situation: I have an UIView with an UIWebView in it. When the viewDidLoad the Javascript Object inside the UIWebView is called (Microsoft Seadragon AJAX JS). For your Understanding: Seadragon loads a specified megapixel image(JPEG) and in a Desktop Browser like Firefox i can Zoom into the image and I can drag the crop for example from the middle to the left. In the iPhone Simulator (for iPad) only the Zooming Function is working on one single tap but when i try to drag the crop (with left mouse button click and holding it) I'm dragging the whole UIWebView but not the crop of course! Is that feature which the simulator isn't able to handle or what's yout solutin guys? Special Thanks!! P.S.: It's a bit jiggling when the zooming function of Seadragon is called. Is that authentic to the real performance of the iPad or does the simulator not have the power as the iPad has?

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  • Dealing with HTTP Status Codes in PHPUnit_Extensions_Selenium2TestCase

    - by frosty
    I have a series of tests that I'm running for an Open Source Project, I'd like to get the status code of the curl request that is made to determine the difference of a code change breaking functionality vs a code change breaking the site completely. class ExampleTest extends PHPUnit_Extensions_Selenium2TestCase { public function setUp() { $this->setBrowser('firefox'); $this->setBrowserUrl('http://localhost'); } public function testForError() { $this->url('/'); $this->assertNotEmpty($this->title()); } } That's an example of how I'm going about it now, but I'd like to have some concrete information. Short of getting the information from the CURL request, I'm not really sure how to go about this...

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  • Rotation Matrix calculates by column not by row

    - by pinnacler
    I have a class called forest and a property called fixedPositions that stores 100 points (x,y) and they are stored 250x2 (rows x columns) in MatLab. When I select 'fixedPositions', I can click scatter and it will plot the points. Now, I want to rotate the plotted points and I have a rotation matrix that will allow me to do that. The below code should work: theta = obj.heading * pi/180; apparent = [cos(theta) -sin(theta) ; sin(theta) cos(theta)] * obj.fixedPositions; But it wont. I get this error. ??? Error using == mtimes Inner matrix dimensions must agree. Error in == landmarkslandmarks.get.apparentPositions at 22 apparent = [cos(theta) -sin(theta) ; sin(theta) cos(theta)] * obj.fixedPositions; When I alter forest.fixedPositions to store the variables 2x250 instead of 250x2, the above code will work, but it wont plot. I'm going to be plotting fixedPositions constantly in a simulation, so I'd prefer to leave it as it, and make the rotation work instead. Any ideas? Also, fixed positions, is the position of the xy points as if you were looking straight ahead. i.e. heading = 0. heading is set to 45, meaning I want to rotate points clockwise 45 degrees. Here is my code: classdef landmarks properties fixedPositions %# positions in a fixed coordinate system. [x, y] heading = 45; %# direction in which the robot is facing end properties (Dependent) apparentPositions end methods function obj = landmarks(numberOfTrees) %# randomly generates numberOfTrees amount of x,y coordinates and set %the array or matrix (not sure which) to fixedPositions obj.fixedPositions = 100 * rand([numberOfTrees,2]) .* sign(rand([numberOfTrees,2]) - 0.5); end function obj = set.apparentPositions(obj,~) theta = obj.heading * pi/180; [cos(theta) -sin(theta) ; sin(theta) cos(theta)] * obj.fixedPositions; end function apparent = get.apparentPositions(obj) %# rotate obj.positions using obj.facing to generate the output theta = obj.heading * pi/180; apparent = [cos(theta) -sin(theta) ; sin(theta) cos(theta)] * obj.fixedPositions; end end end P.S. If you change one line to this: obj.fixedPositions = 100 * rand([2,numberOfTrees]) .* sign(rand([2,numberOfTrees]) - 0.5); Everything will work fine... it just wont plot.

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  • Returning errors from AMFPHP on purpose.

    - by Morieris
    When using flash remoting with amfphp, what can I write in php that will trigger the 'status' method that I set up in my Responder in Flash? Or more generally, how can I determine if the service call has failed? The ideal solution for me would be to throw some exception in php serverside, and catch that exception in flash clientside... How do other people handle server errors with flash remoting? var responder = new Responder( function() { trace("some normal execution finished successfully. this is fine."); }, function(e) { trace("how do I make this trigger when my server tells me something bad happened?"); } ); myService = new NetConnection; myService.connect("http://localhost:88/amfphp/gateway.php"); myService.call("someclass.someservice", responder);

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  • A Simple PHP Array Manipulation

    - by Ygam
    Hi guys! how would you turn this array: array( 0 => Title1, 1 => Title2, 3 => Address1, 4 => Address2, ) to this array: array ( 0 => array( 'title' => 'Title1' 'address' =>'Address1' ), 1 => array( 'title' => 'Title2', 'address' => 'Address2' ) ); when you were initially given $_POST['title'] = array('Title1', 'Title2); $_POST['address'] = array('Address1', 'Address2'); which when merged would give you the first array I have given I was able to solve this via a high level Arr:Rotate function in Kohana framework, along with Arr::merge function but I can't quite understand the implementation. Please help

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  • zoom_changed only triggers once in google maps api version 3 using MVC

    - by fredrik
    Hi, I'm trying to use the MVC objects in google maps version 3. What I can't seem to figure out is why my zoom_changed method is only invoked once. When I first load the map the zoom_changed method is invoked. But not when I zoom on the map. function MarkerWidget (options) { this.setValues(options); this.set('zoom', this.map.zoom); var marker = new google.maps.Marker({ icon : this.icon, mouseOverIcon : this.mouseOverIcon, orgIcon : this.orgIcon }); marker.bindTo('map', this); marker.bindTo('position', this); google.maps.event.addListener(marker, 'mouseover', this.onmouseover); google.maps.event.addListener(marker, 'mouseout', this.onmouseout); } MarkerWidget.prototype = new google.maps.MVCObject(); MarkerWidget.prototype.zoom_changed = function () { $.log(this, new Date()); } Shouldn't the map object fire the zoom event and notify all object's that has "this.set('zoom', this.map.zoom)" ? ..fredrik

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  • remove cssclass from one anchor and assign to another in jquery...

    - by Pandiya Chendur
    Here are my anchors, <a ID="lnkbtn0" class="page-numbers" href="#">1</a> <a ID="lnkbtn1" class="page-numbers" href="#">2</a> <a ID="lnkbtn2" class="page-numbers" href="#">3</a> <a ID="lnkbtn3" class="page-numbers" href="#">4</a> And my click function i am adding a cssclass to show that it is the current anchor $("a.page-numbers").click(function() { $(this).addClass('page-numbers current'); }); What happens is when i click the next anchor the same class has been added to the current and the previous anchor... What can be done to remove the cssclass page-numbers current and assign cssclass page-numbers to the previous/all other anchors without changing the current one....

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  • PBKDF2-HMAC-SHA1

    - by Jason
    To generate a valid pairwise master key for a WPA2 network a router uses the PBKDF2-HMAC-SHA1 algorithm. I understand that the sha1 function is performed 4096 times to derive the PMK, however I have two questions about the process. Excuse the pseudo code. 1) How is the input to the first instance of the SHA1 function formatted? SHA1("network_name"+"network_name_length"+"network_password") Is it formatted in that order, is it the hex value of the network name, length and password or straight ASCII? Then from what I gather the 160 bit digest received is fed straight into another round of hashing without any additional salting. Like this: SHA1("160bit digest from last round of hashing") Rise and repeat. 2) Once this occurs 4096 times 256 bits of the output is used as the pairwise master key. What I don't understand is that if SHA1 produces 160bit output, how does the algorithm arrive at the 256bits required for a key? Thanks for the help.

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  • JQuery Ajax response not triggering success

    - by Mohammad
    This is my code, $.ajax({ type:"get", //this doesn't work //url:'http://example.com/json.php', //But this works url:'http://api.flickr.com/services/feeds/photos_public.gne?tags=cat&tagmode=any&format=json&jsoncallback=?', dataType:"jsonp", success:function(data){ alert('success'); }, error:function(){ alert('error'); } }); in json.php I have <?php header("Content-type: application/javascript"); ?> Then I've copied all the output of that flickr url. So the problem shouldn't be in the content of my code but how it's being sent. What do i need to fix here? Thanks in advance!

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  • VS2008 C++ MFC Access Violation ONLY when stepping through debug mode

    - by HotOil
    Hi. This is crazy. It started happening in my main project, so I created a tiny sample brand-new project to reproduce it in and sure enough.. It does NOT happen in a sample project I created that is only a Win32 console app. I'm running this on Win7x64, if that matters. VS2008 SP1. Here goes. I create a small dialog app with a button. Put a breakpoint in the handler function for that button. The button handler function looks like this: void CTestProjectDlg::OnBnClickedButton1() { int i=2; m_csHello.Format(_T("Hello World!")); << breakpoint here UpdateData(FALSE); } Click the button, hit the breakpoint. F10 to step, and boom: "First-chance exception at 0x0398f77b in TestProject.exe: 0xC0000005: Access violation." It gives me the option to Break or Continue. If I Continue, it just hits it again, only not "First Chance". Yes I have that exception checked in the Debug-Exceptions dlg. If I Break, the call stack just shows me the line where the breakpoint is. If I F10 again.. I get the exception again, only now the callstack shows me in the _AfxDispatchCmdMsg() function, and my original OnBnClickedButton1() is not in the callstack anymore. It doesn't matter where I put the breakpoint. If, instead of F10, I just continue with F5, it works normally. Now.. if I build a Release version and run in debugging mode: I hit the breakpoint, and all the pointers, variable values look normal. F10, and these turn to garbage. The this pointer is now zero. The m_csHello is now However, in Release mode, an exception is not caught, and it all runs fine. The "hello World string gets displayed in the dialog box as it should. I have put in an inquiry to see if some patch was installed on my box by the IT dept in the last day or two. This wasn't happening 2 days ago. What do you think? Is VS2008 corrupted? Thanks.

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  • Event Listener in Google Charts API

    - by DeanGrobler
    I'm busy using Google Charts in one of my projects to display data in a table. Everything is working great. Except that I need to see what line a user selected once they click a button. This would obviously be done with Javascript, but I've been struggling for days now to no avail. Below I've pasted code for a simple example of the table, and the Javascript function that I want to use (that doesn't work). <html> <head> <script type='text/javascript' src='https://www.google.com/jsapi'></script> <script type='text/javascript'> google.load('visualization', '1', {packages:['table']}); google.setOnLoadCallback(drawTable); var table = ""; function drawTable() { var data = new google.visualization.DataTable(); data.addColumn('string', 'Name'); data.addColumn('number', 'Salary'); data.addColumn('boolean', 'Full Time Employee'); data.addRows(4); data.setCell(0, 0, 'Mike'); data.setCell(0, 1, 10000, '$10,000'); data.setCell(0, 2, true); data.setCell(1, 0, 'Jim'); data.setCell(1, 1, 8000, '$8,000'); data.setCell(1, 2, false); data.setCell(2, 0, 'Alice'); data.setCell(2, 1, 12500, '$12,500'); data.setCell(2, 2, true); data.setCell(3, 0, 'Bob'); data.setCell(3, 1, 7000, '$7,000'); data.setCell(3, 2, true); table = new google.visualization.Table(document.getElementById('table_div')); table.draw(data, {showRowNumber: true}); } function selectionHandler() { selectedData = table.getSelection(); row = selectedData[0].row; item = table.getValue(row,0); alert("You selected :" + item); } </script> </head> <body> <div id='table_div'></div> <input type="button" value="Select" onClick="selectionHandler()"> </body> </html> Thanks in advance for anyone taking the time to look at this. I've honestly tried my best with this, hope someone out there can help me out a bit.

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  • How to remove child(Movieclip) and add to new parent (Movieclip)

    - by vineth
    Hi, I need to remove the child(movieClip) from the parent(movieClip) while dragging and add the same child(movieClip) to another movieclip when dropped. this method is used for dragging function pickUp(event:MouseEvent):void { event.target.startDrag(); } when i drop it function dropIt(event:MouseEvent):void { event.target.parent.removeChild(event.target); //for removing from previous parent clip event.target.dropTarget.parent.addChild(event.target); // add to new Moviclip } But the clip is not visible or not available while dropping... Help me to overcome from this Problem.

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  • jquery issue, disable on mouseenter queue

    - by jason
    When you mouseenter .li_group class it does a slide down effect on 1 single <li> tag, everything goes smoothly, but during the delay if you take your mouse off and on .li_group it "queues" the effect and slides the li down, delay, slides it down again etc etc... I have tried every way i can think of, even stop(); but it still does it... the reason i use mouseenter instead of hover, is because it works better for ul / li list $(".li_group").live('mouseenter',function(){ var id = "#ec1"; $(id).slideDown(); }).live('mouseleave',function(){ if (jQuery.support.cssFloat==true || getInternetExplorerVersion() > 7) { //ie < 8 endless up/down on close var id = "#ec1"; $(id).delay(5000).slideUp('fast'); } });

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  • jQuery AJAX call undefined error with special characters

    - by David
    Hi, I tried to make an AJAX call using jQuery, the data has special characters, e.g {'data':'<p>test</p>'}. It seems failed to pass this data in the first place. It will work if i just pass {'data':'test'}. encodeURIComponent and JSON.stringify failed here due to the special character < > /. Could anyone please help with it? Thanks. $.ajax({ type: "POST", url: "services.aspx", data: "data=" + encodeURIComponent(JSON.stringify(obj)), dataType: "text", error: function(xhr, textStatus, errorThrown) { alert("ERROR"); }, success: function(data) { } }); Regards, David

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  • Is it possible to search through json result with jQuery

    - by mickyjtwin
    What I'm trying to achieve, is to output a json list that contains a list of Css classes, and their corresponding url records, i.e. var jsonList = [{"CSSClass":"testclass1","VideoUrl":"/Movies/movie.flv"},{"CSSClass":"testclass2","VideoUrl":"/Movies/movie2.flx"}]; //]]> foreach item in the list I am adding a click event to the class... $.each(script, function() { $("." + this.CSSClass, "#pageContainer").live('click', function(e) { videoPlayer.playMovie(this); return false; }); }); What I'm wondering, is if I can somehow get the corresponding url from the jsonlist, without having to loop through them all again, searching for CSSClass, or adding the url to the link as an attribute?

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  • Using DLL that using COM in C#

    - by chekalin-v
    I have been writing DLL on C++, that will be use in C#. DLL have some function, where I call hres = CoInitializeEx(NULL, COINIT_MULTITHREADED); and next call hres = CoInitializeSecurity( NULL, -1, // COM authentication NULL, // Authentication services NULL, // Reserved RPC_C_AUTHN_LEVEL_PKT, // Default authentication RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation NULL, // Authentication info EOAC_NONE, // Additional capabilities NULL // Reserved ); There are no error then I trying to use this dll in C++. But if I call function from DLL via C# application I see Error (80010106) Cannot change thread mode after it is set. I changed hres = CoInitializeEx(NULL, COINIT_MULTITHREADED); to hres = CoInitialize(NULL); After this changes error appear after CoInitializeSecurity: (80010119) Security must be initialized before any interfaces are marshalled or unmarshalled. It cannot be changed once initialized. How resolve this trouble?

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  • Which is faster in Python: x**.5 or math.sqrt(x)?

    - by Casey
    I've been wondering this for some time. As the title say, which is faster, the actual function or simply raising to the half power? UPDATE This is not a matter of premature optimization. This is simply a question of how the underlying code actually works. What is the theory of how Python code works? I sent Guido van Rossum an email cause I really wanted to know the differences in these methods. My email: There are at least 3 ways to do a square root in Python: math.sqrt, the '**' operator and pow(x,.5). I'm just curious as to the differences in the implementation of each of these. When it comes to efficiency which is better? His response: pow and ** are equivalent; math.sqrt doesn't work for complex numbers, and links to the C sqrt() function. As to which one is faster, I have no idea...

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