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  • Use LINQ to count the number of combinations existing in two lists

    - by Ben McCormack
    I'm trying to create a LINQ query (or queries) that count the total number of occurences of a combinations of items in one list that exist in a different list. For example, take the following lists: CartItems DiscountItems ========= ============= AAA AAA AAA BBB AAA BBB BBB CCC CCC DDD The result of the query operation should be 2 since I can find two combinations of AAA and BBB (from DiscountItems) within the contents of CartItems. My thinking in approaching the query is to join the lists together to shorten CartItems to only include items from DiscountItems. The solution would be to find the CartItem in the resulting query that occurs the least amount of times, thus indicating how many combinations of items exist in CartItems. How can this be done? Here's the query I already have, but it's not working. query results in an enumeration with 100 items, far more than I expected. Dim query = From cartItem In Cart.CartItems Group Join discountItem In DiscountGroup.DiscountItems On cartItem.SKU Equals discountItem.SKU Into Group Select SKU = cartItem.SKU, CartItems = Group Return query.Min(Function(x) x.CartItems.Sum(Function(y) y.Quantity))

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  • jQuery works in FF but not in Safari

    - by Hristo
    I have some event handlers that work in FF and not in Safari. Simply put, I have a list of friends, some hard-coded, some pulled in from a database. Clicking on a buddy opens a chat window... this is much like the Facebook chat system. So in Firefox, everything works normally and as expected. In Safari, clicking on buddies that are hard-coded works fine, but clicking on buddies that are pulled in from the database doesn't pull up the chat window. <script type="text/javascript" src="js/jQuery.js"></script> <script type="text/javascript" src="js/chat.js"></script> <script type="text/javascript" src="js/ChatBar.js"></script> <script type="text/javascript" src="js/settings.js"></script> <script type="text/javascript"> var chat = new Chat(); var from = <?php echo "'" .$_SESSION['userid'] . "'"; ?>; chat.getUsers(<?php echo "'" .$_SESSION['userid'] . "'"; ?>); </script> So I load all my buddies with chat.getUsers. That function is: // get list of friends function getBuddyList(userName) { userNameID = userName; $.ajax({ type: "GET", url: "buddyList.php", data: { 'userName': userName, 'current': numOfUsers }, dataType: "json", cache: false, success: function(data) { if (numOfUsers != data.numOfUsers) { numOfUsers = data.numOfUsers; var list = "<li><span>Agents</span></li>"; for (var i = 0; i < data.friendlist.length; i++) { list += "<li><a class=\"buddy\" href=\"#\"><img alt=\"\" src=\"images/chat-thumb.gif\">"+ data.friendlist[i] +"</a></li>"; } $('#friend-list ul').append($(list)); } setTimeout('getBuddyList(userNameID)', 1000); } }); } buddyList.php just pulls in the Users from the database and returns an array with the user names. So the jQuery for clicking a buddy is: // click on buddy in #friends-panel $('#friends-panel a.buddy').click(function() { alert("Loaded"); // close #friends-panel $('.subpanel').hide(); $('#friends-panel a.chat').removeClass('active'); // if a chat window is already active, close it and deactivate $('#mainpanel li[class="active-buddy-tab"] div').not('#chat-box').removeAttr('id'); $('#mainpanel li[class="active-buddy-tab"]').removeClass('active-buddy-tab').addClass('buddy-tab'); // create active buddy chat window $('#mainpanel').append('<li class="active-buddy-tab"><a class="buddy-tab" href="#"></a><div id="chat-window"><h3><p id="to"></p></h3></div></li>'); // create name and close/minimize buttons $('.active-buddy-tab div h3 p#to').text($(this).text()); $('.active-buddy-tab div h3').append('<span class="close"> X </span><span class="minimize"> &ndash; </span>'); $('.active-buddy-tab').append('<span class="close"> X </span>'); // create chat area $('.active-buddy-tab div').append('<div id="chat-box"></div><form id="chat-message"><textarea id="message" maxlength="100"></textarea></form>'); // put curser in chat window $('.active-buddy-tab #message').focus(); // create a chat relationship return false; }); ... and the basic structure of the HTML is: <div id="footpanel"> <ul id="mainpanel"> <li id="friends-panel"> <a href="#" class="chat">Friends (<strong>18</strong>) </a> <div id="friend-list" class="subpanel"> <h3><span> &ndash; </span>Friends Online</h3> <ul> <li><span>Family Members</span></li> <!-- Hard coded buddies --> <li><a href="#" class="buddy"><img src="images/chat-thumb.gif" alt="" /> Your Friend 1</a></li> <li><a href="#" class="buddy"><img src="images/chat-thumb.gif" alt="" /> Your Friend </a></li> <!-- buddies will be added in dynamically here --> </ul> </div> </li> </ul> </div> I'm not too sure where to begin solving this issue. I thought it might be a rendering bug or something with the DOM but I've been staring at this code all day and I'm stuck. Any ideas on why it works in FF and not in Safari? btw... I'm testing on Snow Leopard. Thanks, Hristo

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  • why won't my ajax work asynchronously

    - by payling
    I'm having trouble understanding why my code will not work asynchronously. When running asynchronously the get_price.php always receives the same $_GET value even though the alert before outputs a unique $_GET value. var arraySize = "<? echo count($_SESSION['items']); ?>"; //get items count var pos = 0; var pid; var qty; getPriceAjax(); function getPriceAjax() { pid = document.cartItemForm.elements[pos].id; //product id qty = document.cartItemForm.elements[pos].value; //quantity alert('Product: ' + pid + ' Quantity: ' + qty); $.ajax({ url:"includes/ajax_php/get_price.php", type:"GET", data:'pid='+pid+'&qty='+qty, async:true, cache:false, success:function(data){ while(pos < arraySize) { document.getElementById(pid + 'result').innerHTML=data; pos++; getPriceAjax(); } } }) }

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  • php database session handling problem in IE8!

    - by psyb0rg
    I've got an html page from where Im making this call periodically: function logon(id) { $.get("data.php", { action: 'online', userID: id}, function(data){ $("#msg").html(data); }); } What this does is it calls this SQL script in data.php: $sql = "update user_sessions set expires=(expires + 2) where userID = $userID"; mysql_query($sql, $conn) or die(mysql_error()); echo $sql; I can see by the echo that the sql syntax and values are correct, but THE CHANGES TO THE expires FIELD ARE NOT DONE, ONLY IN IE8!! It works fine in other ff, safari, chrome, ie6 and 7. There is nothing browser specific about making this sql call, but the user_sessions table is used to store PHP's sessions. Im only increasing the session expiry time when the call is made. What in IE8's session handling is preventing the session time from changing? Is there any caching or cookie problem that needs to be changed?

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  • Initialize a Variable Again.

    - by SoulBeaver
    That may sound a little confusing. Basically, I have a function CCard newCard() { /* Used to store the string variables intermittantly */ std::stringstream ssPIN, ssBN; int picker1, picker2; int pin, bankNum; /* Choose 5 random variables, store them in stream */ for( int loop = 0; loop < 5; ++loop ) { picker1 = rand() % 8 + 1; picker2 = rand() % 8 + 1; ssPIN << picker1; ssBN << picker2; } /* Convert them */ ssPIN >> pin; ssBN >> bankNum; CCard card( pin, bankNum ); return card; } that creates a new CCard variable and returns it to the caller CCard card = newCard(); My teacher advised me that doing this is a violation of OOP principles and has to be put in the class. He told me to use this method as a constructor. Which I did: CCard::CCard() { m_Sperre = false; m_Guthaben = rand() % 1000; /* Work */ /* Convert them */ ssPIN >> m_Geheimzahl; ssBN >> m_Nummer; } All variables with m_ are member variables. However, the constructor works when I initialize the card normally CCard card(); at the start of the program. However, I also have a function, that is supposed to create a new card and return it to the user, this function is now broken. The original command: card = newCard(); isn't available anymore, and card = new CCard(); doesn't work. What other options do I have? I have a feeling using the constructor won't work, and that I probably should just create a class method newCard, but I want to see if it is somehow at all possible to do it the way the teacher wanted. This is creating a lot of headaches for me. I told the teacher that this is a stupid idea and not everything has to be classed in OOP. He has since told me that Java or C# don't allow code outside of classes, which sounds a little incredible. Not sure that you can do this in C++, especially when templated functions exist, or generic algorithms. Is it true that this would be bad code for OOP in C++ if I didn't force it into a class?

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  • Slickgrid, confirm before edit

    - by Evan
    I am making a slick grid and need the ability to add rows with a code column. For this to be possible the code column needs to be editable for the entire table. I am trying to work out a way that I can confirm the edit with a standard javascript confirm popup box. I tried putting one into the onedit event within the slickgrid constructor and that executed after the edit. I am led to believe that the edit function is independent from calling the edit stored procedure of the database. Is there a better way to go about this? RF_tagsTable = new IndustrialSlickGrid( LadlesContainerSG , { URL: Global.DALServiceURL + "CallProcedure" , DatabaseParameters: { Procedure: "dbo.TableRF_tags" , ConnectionStringName: Global.ConnectionStringNames.LadleTracker } , Title: "RF tags" , Attributes: { AllowDelete: true , defaultColumnWidth: 120 , editable: true , enableAddRow: true , enableCellNavigation: true , enableColumnReorder: false , rowHeight: 25 , autoHeight: true , autoEdit: false , forceFitColumns: true } , Events: { onRowEdited : rowEdited /*function(){ //this is my failed attempt var r=confirm("Edit an existing tag?") if (r){ alert(r); } else { alert(r); } }*/ , onRowAdded : rowAdded } });

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  • jQuery FadeIn, FadeOut Div - IE7 bug

    - by user1058223
    I have a div that will fade in and out on hover in FF, but in IE7 it just hides and shows with no animation. Here is my code: #nav-buttons { display:none; width:894px; position:relative; z-index:1000; } ---------- <div id="contents"> <div id="nav-buttons"> <a href="javascript:void(0)" id="left-button"></a> <a href="javascript:void(0)" id="right-button"></a> </div> other html.... </div> ---------- $(document).ready(function() { $("#contents").hover(function() { $("#nav-buttons").fadeToggle("slow"); }); });

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  • Option Value Changed - ODBC Error 2169

    - by fredrick-ughimi
    Hello Edgar, Thank you for your response. I am using Powerbasic (www.powerbasic.com) as my compiler and SQLTools as a third party tool to access ADS through ODBC. I must stat that this error also appers when I take other actions like Update, Delete, Find, etc. But I don't get this error when I am using MS Access. Here is my save routine: [Code] Local sUsername As String Local sPassword As String Local sStatus As String Local sSQLStatement1 As String sUsername = VD_GetText (nCbHndl, %ID_FRMUPDATEUSERS_TXTUSERNAME) If Trim$(sUsername) = "" Then MsgBox "Please, enter Username", %MB_ICONINFORMATION Or %MB_TASKMODAL, VD_App.Title Control Set Focus nCbHndl, %ID_FRMUPDATEUSERS_TXTUSERNAME Exit Function End If sPassword = VD_GetText (nCbHndl, %ID_FRMUPDATEUSERS_TXTPASSWORD) If Trim$(sPassword) = "" Then MsgBox "Please, enter Password", %MB_ICONINFORMATION Or %MB_TASKMODAL, VD_App.Title Control Set Focus nCbHndl, %ID_FRMUPDATEUSERS_TXTPASSWORD Exit Function End If sStatus = VD_GetText (nCbHndl, %ID_FRMUPDATEUSERS_CBOSTATUS) sSQLStatement1 = "INSERT INTO [tblUsers] (Username, Password, Status) " + _ "VALUES ('" + sUsername + "','" + sPassword + "','" + sStatus +"')" 'Submit the SQL Statement to the database SQL_Stmt %SQL_STMT_IMMEDIATE, sSQLStatement1 'Check for errors If SQL_ErrorPending Then SQL_MsgBox SQL_ErrorQuickAll, %MSGBOX_OK End If [/code] Best regards,

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  • creating button

    - by eomer
    hi I started to learn as3 using fdt i managed to put texts on screen now i want to show the text after the button is clicked but the button does not appear here is the code ` package { import flash.events.MouseEvent; import flash.media.Camera; import mx.controls.Button; import flash.display.Sprite; import flash.text.TextField; public class test2 extends Sprite { private var tField:TextField; public function click(e:MouseEvent):void { tField = new TextField(); tField.text="ffff"; addChild(tField); } public function test2():void { var aa:Button=new Button(); aa.label="deneme"; aa.x=100; aa.y=200; aa.addEventListener(MouseEvent.CLICK, click) } } } ` help me pleaseee

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  • Delphi JavaDoc Parser

    - by Christian Sciberras
    I need to parse JavaDoc (documentation) comment syntax with Delphi 7. It is well known in the java world as "JavaDoc", but I'm actually doing this for PHP, ie, parsing JavaDoc in some PHP code. Call it PHPDoc if you want to. To see how these comments work, you can see RAD IDEs like NetBeans etc. Example of JavaDoc for addition function: /** * Adds to numbers together. * @param integer $a The first number. * @param integer $b The second number. * @return integer The resulting number. */ function add($a,$b){ return $a+$b; } Please note that the parser need not be full, ie, parsing all of the PHP code. I mean, it's perfectly fine if it accepted the comment text only as input. Cheers, Chris.

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  • dynamically embedding youtube videos with jquery

    - by danwoods
    Hello all, I'm trying to retrieve a listing of a user's youtube videos and embed them in a page using jQuery. My code looks something like this: $(document).ready(function() { //some variables var fl_obj_template = $('<object width="260" height="140">' + '<param name="movie" value=""></param>' + '<param name="allowFullScreen" value="true"></param>' + '<param name="allowscriptaccess" value="always"></param>' + '<embed src="" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="260" height="140"></embed>' + '</object>'); var video_elm_arr = $('.video'); //hide videos until ready $('.video').addClass('hidden'); //pull video data from youtube $.ajax({ url: 'http://gdata.youtube.com/feeds/api/users/username/uploads?alt=json', dataType: 'jsonp', success: function(data) { $.each(data.feed.entry, function(i,item){ //only take the first 7 videos if(i > 6) return; //give the video element a flash object var cur_flash_obj = fl_obj_template; //assign title $(video_elm_arr[i]).find('.video_title').html(item.title.$t); //clean url var video_url = item.media$group.media$content[0].url; var index = video_url.indexOf("?"); if (index > 0) video_url = video_url.substring(0, index); //and asign it to the player's parameters $(cur_flash_obj).find('object param[name="movie"]').attr('value', video_url); $(cur_flash_obj).find('object embed').attr('src', video_url); //alert(cur_flash_obj); //insert flash object in video element $(video_elm_arr[i]).append(cur_flash_obj); //and show $(video_elm_arr[i]).removeClass('hidden'); }); } }); }); (of course with 'username' being the actual username). The video titles appear correctly but no videos show up. What gives? The target html looks like: <div id="top_row_center" class="video_center video"> <p class="video_title"></p> </div>

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  • Grab only 2 items from Jquery Loop

    - by Bry4n
    Here is my Jquery $th.each(function(idx) { var notSelected = $(this).text(); if ((notSelected.indexOf(to) != -1) || (notSelected.indexOf(from) != -1)) { if (idx < 10) { $(this).show(); // and show its corresponding td $td.eq(idx).show(); } } }); It is part of a tableFilter type function for a HTML table. However I want it to only display only 2 of the results. I tried instantiating some kind of index counter but I was unsuccessful. Any help or thoughts would be appreciated.

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  • jQuery UI sortable issue

    - by colourandcode
    When I try to use a sortable event . (For instance the stop() event) It only works when I bind it using : $('.selector').bind('sortstop', function(event, ui) { ... }); rather than $('.selector').sortable({ stop: function(event, ui) { ... } }); Is there a missing piece in this? The only reason I ask is because when I bind using the actual bind() method it's not giving me access to the event or ui parameters I pass in. I'm always returned undefined.

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  • my javascript code is working in internet explorer but not working in mozilla

    - by goutham
    function buildMenu() { speed=35; topdistance=100; items=6; y=-50; ob=1; if (navigator.appName == "Netscape") { v=".top=",dS="document.",sD=""; } else { v=".pixelTop=",dS="",sD=".style"; } } function scrollItems() { if (ob<items+1) { objectX="object"+ob; y+=10; eval(dS + objectX + sD + v + y); if (y<topdistance) setTimeout("scrollItems()",speed); else y=-50, topdistance+=40, ob+=1, setTimeout("scrollItems()",speed); } }

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  • DllImport Based on OS Platform

    - by Ngu Soon Hui
    I have a mixture of unmanaged code ( backend) and managed code ( front end), as such, I would need to call the unmanaged code from my managed code, using interop techniques and DllImport attribute. Now, I've compiled two versions of unmanaged code, for both 32 and 64 bit OS; they are named service32.dll and service64.dll respectively. So, in my .Net code, I would have to do a DllImport for both dlls: [DllImport(@"service32.dll")] //for 32 bit OS invocation public static void SimpleFunction(); [DllImport(@"service64.dll")] //for 64 bit OS invocation public static void SimpleFunction(); And call them depending on which platform my application is running on. The issue now is that for every unmanaged function, I have to declared it twice, one for 32 bit OS and one for 64 bit OS. This is a duplication of work, and everytime I change the signature of an unmanaged function, I have to modified it in two places. Is there anyway that I can change the argument in DllImport so that the correct dll will be invoked automagically, depending on the platform?

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  • External SWF Loading problem

    - by Glycerine
    I have an SWF loading in an SWF containing a papervision scene. I've done it before yet problem is, I get an error - I'm not sure what the issue really is. private function downloadSWF(url:String):void { trace(url); var urlRequest:URLRequest = new URLRequest(url); var loader:Loader = new Loader(); loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, loaderProgressEventHandler); loader.load(urlRequest); } private function loaderProgressEventHandler(ev:ProgressEvent):void { loader.preloaderCircle.percent = ev.bytesLoaded / ev.bytesTotal; } When the application runs the code - I get the error: TypeError: Error #1009: Cannot access a property or method of a null object reference. at com.dehash.pv3d.examples.physics::WowDemo() Why am I getting this if the loading hasn't even complete yet? Thanks in advance guys.

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  • How do I use compiler intrinsic __fmul_?

    - by Eric Thoma
    I am writing a massively parallel GPU application. I have been optimizing it by hand. I received a 20% performance increase with _fdividef(x, y), and according to The Cuda C Programming Guide (section C.2.1), using similar functions for multiplication and adding is also beneficial. The function is stated as this: "_fmulrn,rz,ru,rd". __fdividef(x,y) was not stated with the arguments in brackets. I was wondering, what are those brackets? If I run the simple code: int t = __fmul_(5,4); I a compiler error about how _fmul is undefined. I have the CUDA runtime included, so I don't think it is a setup thing; rather it is something to do with those square brackets. How do I correctly use this function? Thank you.

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  • Backtracking infinite loop

    - by Greenhorn
    This is Exercise 28.1.2 from HtDP. I've successfully implemented the neighbors function and all test cases pass. (define Graph (list (list 'A (list 'B 'E)) (list 'B (list 'E 'F)) (list 'C (list 'D)) (list 'D empty) (list 'E (list 'C 'F)) (list 'F (list 'D 'G)) (list 'G empty))) (define (first-line n alist) (cond [(symbol=? (first alist) n) alist] [else empty])) ;; returns empty if node is not in graph (define (neighbors n g) (cond [(empty? g) empty] [(cons? (first g)) (cond [(symbol=? (first (first g)) n) (first-line n (first g))] [else (neighbors n (rest g))])])) ; test cases (equal? (neighbors 'A Graph) (list 'A (list 'B 'E))) (equal? (neighbors 'B Graph) (list 'B (list 'E 'F))) (equal? (neighbors 'C Graph) (list 'C (list 'D))) (equal? (neighbors 'D Graph) (list 'D empty)) (equal? (neighbors 'E Graph) (list 'E (list 'C 'F))) (equal? (neighbors 'F Graph) (list 'F (list 'D 'G))) (equal? (neighbors 'G Graph) (list 'G empty)) (equal? (neighbors 'H Graph) empty) The problem comes when I copy-paste the code from Figure 77 of the text. It is supposed to determine whether a destination node is reachable from an origin node. However it appears that the code goes into an infinite loop except for the most trivial case where the origin and destination nodes are the same. ;; find-route : node node graph -> (listof node) or false ;; to create a path from origination to destination in G ;; if there is no path, the function produces false (define (find-route origination destination G) (cond [(symbol=? origination destination) (list destination)] [else (local ((define possible-route (find-route/list (neighbors origination G) destination G))) (cond [(boolean? possible-route) false] [else (cons origination possible-route)]))])) ;; find-route/list : (listof node) node graph -> (listof node) or false ;; to create a path from some node on lo-Os to D ;; if there is no path, the function produces false (define (find-route/list lo-Os D G) (cond [(empty? lo-Os) false] [else (local ((define possible-route (find-route (first lo-Os) D G))) (cond [(boolean? possible-route) (find-route/list (rest lo-Os) D G)] [else possible-route]))])) Does the problem lie in my code? Thank you.

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  • Problem for opening jQuery dialog box in ie8

    - by user291247
    Hello, I am using jQuery dialog box and having problem to open it in ie8 in other browsers it will opens but having problem in ie8 only. Also I have one more problem some times ajax request is not working in my dialog box on any browser. code. // Dialog $('#login_div').dialog({ autoOpen: false, width: 600, buttons: { "Cancel": function() { $(this).dialog("close"); } } }); // Dialog Link - login_div $('#dialog_link').click(function(){ $('#login_div').dialog({ autoOpen: false }); //$('#login_div').show(); $('#login_div').dialog('open'); return false; });

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  • mysql_close(): supplied argument is not a valid MySQL-Link resource

    - by Illes Peter
    Here's what I'm trying to do: I've got a db.php file that does all the db manipulation. It has 2 static methods, connect and deconnect. In my other file i simply use db::connect() and db::deconnect(). The mysql_close($con) in the deconnect method just doesn't know who $con is. Since I don't want to instantiate my class static is the only way to go. Declaring 'private $con' in class db doesn't seem to have an effect. Any ideas? class db { public static function connect() { $dbData = parse_ini_file($_SERVER['DOCUMENT_ROOT'].'/config.ini'); $con = mysql_connect($dbData['host'],$dbData['user'],$dbData['pass']); $db = mysql_select_db($dbData['db']); if ((!$con) || (!$db)) return 0; else return 1; } public static function deconnect() { mysql_close($con); } }

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  • Form still posts back with return false in JS

    - by jiewmeng
    it seems like #frmToDo still posts backs <form id="frmToDo" name="frmToDo"> ... <a id="btnSubmit" href="javascript:document.frmToDo.submit();">Add</a> google.load("jquery", 1); google.load("jqueryui", 1); google.setOnLoadCallback(function() { ... $("#frmToDo").submit(function() { return false; ... why will this happen? might it be because of href="javascript:document.frmToDo.submit(). how can i submit the form with that link (i didnt use <input type="submit" /> because of styling problems, it seems like buttons are harder to style, esp in different browsers) the AJAX way?

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  • JS / JQuery character problem

    - by Jimmy Farax
    I have a code which has a character that JS is not handling properly. $(document).ready(function(){ $.getJSON("http://sjama.tumblr.com/api/read/json?callback=?", function (data){ for (var i=0; i<data.posts.length; i++){ var blog = data.posts[i]; var id = blog.id; var type = blog.type; var photo = blog.photo-url-250; if (type == "photo"){ $("#blog_holder").append('<div class="blog_item_holder"><div class="blog_item_top"><img src='+photo+'/></div><div class="blog_item_bottom">caption will go here</div></div>'); } } }); <!-- end $.getJSON }); The problem is with this line: var photo = blog.photo-url-250; after "blog." it reads the "url" part weirdly because of the dash (-) in between. What can I do to sort this problem out?

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  • def constrainedMatchPair(firstMatch,secondMatch,length):

    - by smart
    matches of a key string in a target string, where one of the elements of the key string is replaced by a different element. For example, if we want to match ATGC against ATGACATGCACAAGTATGCAT, we know there is an exact match starting at 5 and a second one starting at 15. However, there is another match starting at 0, in which the element A is substituted for C in the key, that is we match ATGC against the target. Similarly, the key ATTA matches this target starting at 0, if we allow a substitution of G for the second T in the key string. consider the following steps. First, break the key string into two parts (where one of the parts could be an empty string). Let's call them key1 and key2. For each part, use your function from Problem 2 to find the starting points of possible matches, that is, invoke starts1 = subStringMatchExact(target,key1) and starts2 = subStringMatchExact(target,key2) The result of these two invocations should be two tuples, each indicating the starting points of matches of the two parts (key1 and key2) of the key string in the target. For example, if we consider the key ATGC, we could consider matching A and GC against a target, like ATGACATGCA (in which case we would get as locations of matches for A the tuple (0, 3, 5, 9) and as locations of matches for GC the tuple (7,). Of course, we would want to search over all possible choices of substrings with a missing element: the empty string and TGC; A and GC; AT and C; and ATG and the empty string. Note that we can use your solution for Problem 2 to find these values. Once we have the locations of starting points for matches of the two substrings, we need to decide which combinations of a match from the first substring and a match of the second substring are correct. There is an easy test for this. Suppose that the index for the starting point of the match of the first substring is n (which would be an element of starts1), and that the length of the first substring is m. Then if k is an element of starts2, denoting the index of the starting point of a match of the second substring, there is a valid match with one substitution starting at n, if n+m+1 = k, since this means that the second substring match starts one element beyond the end of the first substring. finally the question is Write a function, called constrainedMatchPair which takes three arguments: a tuple representing starting points for the first substring, a tuple representing starting points for the second substring, and the length of the first substring. The function should return a tuple of all members (call it n) of the first tuple for which there is an element in the second tuple (call it k) such that n+m+1 = k, where m is the length of the first substring.

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  • MD5 hash differences between Python and other file hashers

    - by Sam
    I have been doing a bit of programming in Python (still a n00b at it) and came across something odd. I made a small program to find the MD5 hash of a filename passed to it on the command line. I used a function I found here on SO. When I ran it against a file, I got a hash "58a...113". But when I ran Microsoft's FCIV or the md5sum.py in \Python26\Tools\Scripts\, I get a different hash, "591...ae6". The actual hashing part of the md5sum.py in Scripts is m = md5.new() while 1: data = fp.read(bufsize) if not data: break m.update(data) out.write('%s %s\n' % (m.hexdigest(), filename)) This looks functionally identical to the code in the function given in the other answer... What am I missing? (This is my first time posting to stackoverflow, please let me know if I am doing it wrong.)

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