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  • AngularJS databinding

    - by user3652865
    How can I add multiple values to one object in an Array. I am having Environment and Cluster, I am able to assign multiple clusters to one environment. Now I want to add application name to this environment and cluster pair. I am having page called "Add Application". Here I am using select menu to for environment and Cluster. My first question is, when I select environment then want to show only those clusters which are assigned to that environment name. And assign application name to that pair. Also should be able to edit the Application field. I am using environmentServices and clusterServices to store updated data. link of JSFiddle: http://jsfiddle.net/avinashMaddy/J2KLK/5/ Please if someone can help me in this. Below is my code: <div class="maincontent" ng-controller="manageApplicationController"> <div class="article"> <form> <section> <!-- Environment --> <div class="col-md-4"> <label>Environment:</label> <select ng-model="newApp.selectedEnvironment" class="form-control" ng-options="environment.name for environment in environments"> <option value='' disabled style='display:none;'> Select Environment </option> </select> <span> <select ng-switch-when="true" disabled ng-model="newApp.selectedEnvironment" class="form-control" ng-options="environment.name for environment in environments"> <option value='' disabled style='display:none;'> Select Environment </option> </select> </span> </div> <!-- Cluster --> <div class="col-md-4"> <label>Cluster:</label> <span ng-switch on="newApp.showCancel"> <select ng-switch-default ng-model="newApp.selectedCluster" class="form-control" ng-options="cluster for cluster in clusters"> <option value='' disabled style='display:none;'> Select Environment </option> </select> <select ng-switch-when="true" disabled ng-model="newApp.selectedCluster" class="form-control" ng-options="cluster for cluster in clusters"> <option value='' disabled style='display:none;'> Select Environment </option> </select> </span> </div> <!-- Application Name --> <div class="col-md-4"> <label>Application Name:</label> <input type="text" class="form-control" name="applicationName" placeholder="Application" ng-model="app.name" required> <br/> <input type="hidden" ng-model="app.id" /> </div> </section> <!-- submit button --> <section class="col-md-12"> <button type="button" class="btn btn-default pull-right" ng-click="saveNewApplicatons()">Save</button> </section> </form> </div> <!-- table --> <div class="article"> <table class="table table-bordered table-striped"> <tr> <th colspan="6"> <div class="pull-left">Cluster Info</div> </th> </tr> <tr> <th>Environment</th> <th>Cluster</th> <th>Application</th> <th>Edit</th> <th>Header Ifo</th> </tr> <tr ng-repeat="app in applications"> <td>{{app.environment}}</td> <td>{{app.cluster}}</td> <td>{{app.name}}</td> <td> <a href="" ng-click="edit(app.id)" title="Edit">edit</span></a> | <a href="" ng-click="remove(app.id)" title="Delete">delete</a> </td> <td> <!-- Add template --> <script type="text/ng-template" id="addHederInfo.html"> <div class="modal-header"> <h3>Add Header Info</h3> </div> <div class="modal-body"> <input type="text" class="form-control" name="eName" placeholder="Header Key" ng-model="$parent.header.key"> <br/> <input type="text" class="form-control" name="eName" placeholder="Header Value" ng-model="$parent.header.value"> <br /> <input type="hidden" ng-model="header.id" /> <section> <div class="pull-right"> <button class="btn btn-primary" ng-click="saveHeader()">Add</button> <button class="btn btn-warning" ng-click="cancel()">Close</button> </div> </section> </div> <div class="modal-footer"> <h3>Existing Header Info for </h3> <table class="table table-bordered table-striped"> <tr> <th>Header Key</th> <th>Header Vlaue</th> </tr> <tr ng-repeat="header in headers"> <td>{{header.key}}</td> <td>{{header.value}}</td> </tr> </table> </div> </script> <!-- /Add template --> <script type="text/ng-template" id="editHederInfo.html"> <div class="modal-header"> <h3>Edit Header Info</h3> </div> <div class="modal-body"> <input type="text" class="form-control" name="eName" placeholder="Header Key" ng-model="$parent.header.key"> <br/> <input type="text" class="form-control" name="eName" placeholder="Header Value" ng-model="$parent.header.value"> <br /> <input type="hidden" ng-model="header.id" /> <section> <div class="pull-right"> <button class="btn btn-primary" ng-click="saveHeader()">Update</button> <button class="btn btn-warning" ng-click="cancel()">Close</button> </div> </section> </div> <div class="modal-footer"> <h3>Existing Header Info for</h3> <table class="table table-bordered table-striped"> <tr> <th>Header Key</th> <th>Header Vlaue</th> <th>Edit</th> </tr> <tr ng-repeat="header in headers"> <td>{{header.key}}</td> <td>{{header.value}}</td> <td> <a href="" ng-click="editHeader(header.id)" title="Edit"><span class="glyphicon glyphicon-edit" ></span></a> | <a href="" ng-click="removeHeader(header.id)" title="Edit"><span class="glyphicon glyphicon-trash"></span></a> </td> </tr> </table> </div> </script> <!-- Add template --> <!-- /Add template --> <a href="" ng-click="addInfo()">Add</a> | <a href="" ng-click="editInfo()">Edit</a> </td> </tr> </table> </div> </div> Controller.js: var apsApp = angular.module('apsApp', []); apsApp.service('clusterService', function(){ var clusters=[]; //simply returns the environment list this.list = function () { return clusters; }; }); apsApp.service('environmentService', function(){ var environments=[ {name :'DEV',}, {name:'PROD',}, {name:'QA',}, {name:'Linux_Dev',} ]; //simply returns the environment list this.list = function () { return environments; }; apsApp.controller('manageApplicationController', function ($scope, environmentService, clusterService) { var uid = 0; $scope.environments= environmentService.list(); $scope.clusters= clusterService.list(); $scope.newApp = {}; $scope.newApp.selectedEnvironment = $scope.environments[0]; $scope.newApp.selectedCluster = $scope.clusters[0]; $scope.newApp.buttonLabel = 'Save'; $scope.newApp.showCancel = false; /*$scope.applications=[ {'name': 'Enterprice App Store' }, {'name': 'UsageGateway'}, {'name': 'Click 2 Fill'}, {'name': 'ATT SmartWiFi'} ];*/ //add new application $scope.saveNewApplicatons = function() { if ($scope.select.id == undefined) { //if this is new application, add it in applications array $scope.clusters.push({ id: uid++, cluster: $scope.newApp.cluster, environment: $scope.newApp.selectedEnvironment }); } else { $scope.clusters[$scope.select.id].cluster = $scope.select.cluster; $scope.newApp.id = undefined; $scope.newApp.buttonLabel = 'Save Cluster'; $scope.newApp.showCancel = false; }; //clear the add appplicaitons form $scope.newApp.selectedEnvironment = $scope.environments[0]; }; //delete application $scope.remove = function (id) { //search app with given id and delete it for (i in $scope.clusters) { if ($scope.clusters[i].id == id) { confirm("This Cluster will get deleted permanently"); $scope.clusters.splice(i, 1); $scope.clust = {}; } } }; $scope.cancelUpdate = function () { $scope.newApp.buttonLabel = 'Save Cluster'; $scope.newApp.showCancel = false; $scope.newApp.id = undefined; $scope.newApp.cluster = ""; $scope.newApp.selectedEnvironment = $scope.environments[0]; }; });

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  • How to update a number in html via javascript?

    - by Will Merydith
    After a voter votes, I want to update the count. <form class="vote-form" action=""> <div id="{{key}}" class="vote-count">{{votes}}</div> <input class="vote-button" type="submit" class="text-button" value="vote+"/> <input type="hidden" class="brag" name="brag" value="{{key}}"> <input type="hidden" class="voter" name="voter" value="{{current_user.fb_id}}"> </form> <script type="text/javascript"> $(function() { $('.error').hide(); $(".vote-form").submit(function() { var inputs = $(this).find('input:hidden'); var key = $('input.brag', this).val(); $.ajax({ type: "POST", url: "/bean", data: inputs, success: function() { //not sure how to do this, I want to increment {{votes}} $('#' + key).innerHTML = "foo"; } }); return false; }); }); </script>

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  • Send multiple fields with the same name via jQuery

    - by Swell
    Hi, how to send multiple fields with the same name via jQuery like this: <input type="file" name="file[]" /> <input type="file" name="file[]" /> <input type="file" name="file[]" /> jQuery: function upload() { $.post('upload.php', { file[]: uplaodForm.file[].value }, function(output) { $('#result').html(output).show(); }); } upload.php: $file[$i] = $_FILES['file']['name'][$i]; thank you,

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  • Populating a Combobox inside a Gridview

    - by Nawait
    i'm having a few problems working with a gridview and a combobox inside of it. Here is the code for my ListView control: <ListView Height="139" HorizontalAlignment="Left" Margin="10,158,0,0" Name="lvAppointment" VerticalAlignment="Top" Width="250" MinWidth="350"> <ListView.View> <GridView> <GridViewColumn Header="Appointment" Width="120"> <GridViewColumn.CellTemplate> <DataTemplate> <DatePicker SelectedDate="{Binding Path=Appointment}"/> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> <GridViewColumn Header="Type" Width="170"> <GridViewColumn.CellTemplate> <DataTemplate> <ComboBox ???/> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> <GridViewColumn Header="Done" Width="50"> <GridViewColumn.CellTemplate> <DataTemplate> <CheckBox IsChecked="{Binding Path=Done}" IsThreeState="False"/> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> </GridView> </ListView.View> I'm popluating the list from a sql ce database via c# with the following code using (SqlCeCommand sqlCeAppointment = new SqlCeCommand("SELECT appid,appointment,done,apptype.type FROM appointment INNER JOIN apptype ON appointment.refatid = apptype.atid WHERE refeventid = @eventid;", sqlCeConn)) { sqlCeAppointment.Parameters.AddWithValue("@eventid", ((cListEventItem)lvEvent.SelectedItems[0]).id); using (SqlCeDataReader sqlCeAppointmentReader = sqlCeAppointment.ExecuteReader()) { lvAppointment.Items.Clear(); while (sqlCeAppointmentReader.Read()) { lvAppointment.Items.Add(new cListAppointmentItem { id = sqlCeAppointmentReader.GetGuid(sqlCeTerminReader.GetOrdinal("appid")), Appointment = sqlCeAppointmentReader.GetDateTime(sqlCeTerminReader.GetOrdinal("appointment")), Type = sqlCeAppointmentReader.GetString(sqlCeTerminReader.GetOrdinal("type")), Done = sqlCeAppointmentReader.GetByte(sqlCeTerminReader.GetOrdinal("done")) }); } } } I can popluate the list just fine. But i want "Type" to be a combobox so the user can select the apropriate type of the appointment (its a list of appointments connected to an event). This combobox should be filled with data thats inside a table of the sql ce database (apptype). This table is not static, the users can add and delete items from this list. I have tried a few ways i found via google, but failed. I guess i'm having problems understanding how this works/should work. I hope someone can help me :( Thanks in advance

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  • Filtering NSMutableArray based on enum property

    - by Marty
    I've got an NSMutableArray filled with objects of type "GameObject". GameObject has a number of properties, one of which being "gameObjectType" . "gameObjectType" is of type GameObjectTypeEnum. I want to be able to filter this NSMutableArray so only GameObjects of a certain type are returned. I've got the following in place, but it's giving me a "BAD ACCESS" error: NSPredicate *predicate = [NSPredicate predicateWithFormat:@"gameObjectType = %@", gameObjectType]; return [gameObjects filteredArrayUsingPredicate:predicate]; Is it possible to pass a "custom" type (ie, this enum I've defined) into the predicateWithFormat call?

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  • What is the below code

    - by Priyanka
    Hello, I am getting an issue wherein I am using FCKEditor, and once I type in something, in the source of FCKEditor, something like below is getting iserted automatically. <input type="hidden" id="gwProxy" /><!--Session data--><input type="hidden" id="jsProxy" /> <div id="refHTML">&nbsp;</div> Some hidden tag is getting inserted, which isnot getting diplayed here in my question. Can anyone tell me about this. Thanks in Advance

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  • SQL query not working

    - by Ziv
    hi, I'm trying to create a query in an access database for a C# dataset using the query editor but the created method says there is a problem and isn't created correctly. SELECT Discs.* FROM Discs WHERE (Title=@Title OR @Title IS NULL) AND (Type=@Type OR @Type IS NULL) AND (ContainerID=@ContainerID OR @ContainerID IS NULL) AND NOT (@Title IS NULL AND @Type IS NULL AND @ContainerID IS NULL) the error is: Generated SELECT statement. Error in WHERE clause near '@'. Unable to parse query text. the generated select method doesn't have any parameters and is unusable. I've tried the exact same SQL statement in the access query and it worked flawlessly, what am I supposed to be doing differently when transferring it to C#?

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  • Json object merge with unqiue id

    - by Hitu
    I have multiple json Objects json1 = [ {'category_id':1,'name':'test1' }, {'category_id':1,'name':'test2' }, {'category_id':1,'name':'test3' }, {'category_id':2,'name':'test2' }, {'category_id':3,'name':'test1' } ]; json2 = [{'category_id':1,'type':'test1'}]; json3 = [ {'category_id':1,'color':'black'}, {'category_id':2,'color':'black'}, {'category_id':3,'color':'white'} ]; I am expecting output like this final = [ {'category_id':1,'name':'test1','type':'test`','color':'black' }, {'category_id':1,'name':'test2','type':'test`','color':'black' }, {'category_id':1,'name':'test3','type':'test`','color':'black' }, {'category_id':2,'name':'test2','color':'black' }, {'category_id':3,'name':'test1','color':'white' } ]; As i have long json object. Looping is good idea or not ? Does there is any inbuilt function for doing the same.

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  • i get error when i try to upload a file?

    - by getaway
    I keep getting an error:Notice: Undefined index: on line 35 line 35: $handle = new Upload($_FILES['my_field']); this is my input field <input type="file" size="32" name="my_field" value="" /> I do not understand this error, thanks!!! EDIT: <form name="upload" id="upload" enctype="multipart/form-data" method="post" action="actions/upload.php" /> <p><input type="file" size="32" name="my_field" value="" /></p> <p class="button"><input type="hidden" name="action" value="image" /> <br> <input style="margin-left:224px;" type="submit" name="submit" value="upload" />

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  • How do you create a generic method in a class?

    - by Seth Spearman
    Hello, I am really trying to follow the DRY principle. I have a sub that looks like this? Private Sub DoSupplyModel OutputLine("ITEM SUMMARIES") Dim ItemSumms As New SupplyModel.ItemSummaries(_currentSupplyModel, _excelRows) ItemSumms.FillRows() OutputLine("") OutputLine("NUMBERED INVENTORIES") Dim numInvs As New SupplyModel.NumberedInventories(_currentSupplyModel, _excelRows) numInvs.FillRows() OutputLine("") End Sub I would like to collapse these into a single method using generics. For the record, ItemSummaries and NumberedInventories are both derived from the same base class DataBuilderBase. I can't figure out the syntax that will allow me to do ItemSumms.FillRows and numInvs.FillRows in the method. FillRows is declared as Public Overridable Sub FillRows in the base class. Thanks in advance. EDIT Here is my end result Private Sub DoSupplyModels() DoSupplyModelType("ITEM SUMMARIES",New DataBlocks(_currentSupplyModel,_excelRows) DoSupplyModelType("DATA BLOCKS",New DataBlocks(_currentSupplyModel,_excelRows) End Sub Private Sub DoSupplyModelType(ByVal outputDescription As String, ByVal type As DataBuilderBase) OutputLine(outputDescription) type.FillRows() OutputLine("") End Sub But to answer my own question...I could have done this... Private Sub DoSupplyModels() DoSupplyModelType(Of Projections)("ITEM SUMMARIES") DoSupplyModelType(Of DataBlocks)("DATA BLOCKS") End Sub Private Sub DoSupplyModelType(Of T as DataBuilderBase)(ByVal outputDescription As String, ByVal type As T) OutputLine(outputDescription) dim type as New T(_currentSupplyModel,_excelRows) type.FillRows() OutputLine("") End Sub Is that right? Does the New T() work? Seth

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  • Sort objects and polymorphism

    - by ritmbo
    Suppose I have a class A. And B and C are child of A. Class A has a generic algorithm for sorting arrays of type A, so that I could use it for B and C without writing again the algorithm for each. In the algorithm, sometimes I have to swap. The problem is that I can only see the objects as type A, and if I do: A aux = array[i] array[i] = array[j] array[j] = aux I think I have a problem. Because array[i], maybe its of type B, and aux is of type A, so I think I'm losing information. I'm sure u understand this situation... how can I sort a generic array of objects using a father method algorithm?

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  • HTML5 Video Javascript

    - by user373721
    Hi, I am not experienced in Javascript, I have the following script to play video files on Andriod phone, and it works fine. <script type="text/javascript"> function PlayMyVideo(arg) { var myVideo = document.getElementById([arg]); myVideo.play(); } </script> <video id="what" src="what.mp4" poster="" /> <input type="button" onclick="PlayMyVideo('what')" value="Play" /> I am trying to write the tag on the fly: <script type="text/javascript"> function PlayVideo() { new_video = document.createElement('video'); new_video.setAttribute('scr', 'what.mp4'); new_video.play(); } </script> <input type="button" onclick="PlayVideo()" value="Play2" /> Nothing happen, would appreciate your suggestions. Thanks in advance

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  • <script> Tag cannot be self closed?

    - by Joe Hopfgartner
    I had this code in my Website <script type="text/javascript" src="http://code.jquery.com/jquery-1.4.4.min.js"/> <script type='text/javascript' src='/lib/player/swfobject.js'></script> swfobject was not working (not loaded). After altering the code to: <script type="text/javascript" src="http://code.jquery.com/jquery-1.4.4.min.js"></script> <script type='text/javascript' src='/lib/player/swfobject.js'></script> It worked fine. The document was parsed as HTML5. I think its funny. Okay, granted a tag that is closed and a self closing tag are not the same. So i would understand if jquery couldnt load. Altough i find it rediciulous. But what i do not understand is that jquery loads but the following, correctly written tag, doesnt?

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  • Using SQLAlchemy, how can I return a count with multiple columns

    - by Andy
    I am attempting to run a query like this: SELECT comment_type_id, name, count(comment_type_id) FROM comments, commenttypes WHERE comment_type_id=commenttypes.id GROUP BY comment_type_id Without the join between comments and commenttypes for the name column, I can do this using: session.query(Comment.comment_type_id,func.count(Comment.comment_type_id)).group_by(Comment.comment_type_id).all() However, if I try to do something like this, I get incorrect results: session.query(Comment.comment_type_id, Comment.comment_type, func.count(Comment.comment_type_id)).group_by(Comment.comment_type_id).all() I have two problems with the results: (1, False, 82920) (2, False, 588) (3, False, 4278) (4, False, 104370) Problems: The False is not correct The counts are wrong My expected results are: (1, 'Comment Type 1', 13820) (2, 'Comment Type 2', 98) (3, 'Comment Type 2', 713) (4, 'Comment Type 2', 17395) How can I adjust my command to pull the correct name value and the correct count?

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  • Cannot get document.getElementById() to find my textarea

    - by Slruh
    Maybe I've been working on my site for to long, but I can't get the following to work. I am having my textarea fire an onkeyup() event called limiter which is supposed to check the textarea and limit the text in the box, while updated another readonly input field that shows the amount of characters left. This is the javascript code: <script type="text/javascript"> var count = "500"; function limiter(){ var comment = document.getElementById("comment"); var form = this.parent; var tex = comment.value; var len = tex.length; if(len > count){ tex = tex.substring(0,count); comment.value =tex; return false; } form.limit.value = count-len; } </script> The form looks like this: <form id="add-course-rating" method="post" action="/course_ratings/add/8/3/5/3" accept- charset="utf-8"><div style="display:none;"><input type="hidden" name="_method" value="POST" /> //Other inputs here <div id="comment-name" style="margin-top:10px"> <div id="comment-name-text"> <b>Comments</b><br /> Please leave any comments that you think will help anyone else. </div> <style type="text/css"> .rating-form-box textarea { -moz-border-radius:5px 5px 5px 5px; } </style> <div class="rating-form-box"> <textarea name="data[CourseRatings][comment]" id="comment" onkeyup="limiter()" cols="115" rows="5" ></textarea> <script type="text/javascript"> document.write("<input type=text name=limit size=4 readonly value="+count+">"); </script> </div> <input type="submit" value="Add Rating" style="float: right;"> </form> If anyone can help that would be great.

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  • obj-c, how do I create a property and synthesize an NSUInteger ?

    - by Jules
    I'm having some trouble using an NSUInteger, I've tried various things and googled, but not found the answer ? I have... I also tried ... nonatomic, retain @property (readwrite, assign) NSUInteger *anAmount; @synthesize anAmount; error: type of property 'anAmount' does not match type of ivar 'anAmount' Also when I release it in dealloc I get a warning.. warning: invalid receiver type 'NSUInteger'

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  • Int Showing as Long Odd Value

    - by Josh Kahane
    Hi I am trying to send an int in my iphone game for game center multiplayer. The integer is coming up and appearing as an odd long integer value rather than the expected one. I have this in my .h: typedef enum { kPacketTypeScore, } EPacketTypes; typedef struct { EPacketTypes type; size_t size; } SPacketInfo; typedef struct { SPacketInfo packetInfo; int score; } SScorePacket; Then .m: Sending data: scoreData *score = [scoreData sharedData]; SScorePacket packet; packet.packetInfo.type = kPacketTypeScore; packet.packetInfo.size = sizeof(SScorePacket); packet.score = score.score; NSData* dataToSend = [NSData dataWithBytes:&packet length:packet.packetInfo.size]; NSError *error; [self.myMatch sendDataToAllPlayers: dataToSend withDataMode: GKMatchSendDataUnreliable error:&error]; if (error != nil) { // handle the error } Receiving: SPacketInfo* packet = (SPacketInfo*)[data bytes]; switch (packet->type) { case kPacketTypeScore: { SScorePacket* scorePacket = (SScorePacket*)packet; scoreData *score = [scoreData sharedData]; [scoreLabel setString:[NSString stringWithFormat:@"You: %d Challenger: %d", score.score, scorePacket]]; break; } default: CCLOG(@"received unknown packet type %i (size: %u)", packet->type, packet->size); break; } Any ideas? Thanks.

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  • regex to match specific html tags

    - by Rco8786
    I need to match html tags(the whole tag), based on the tag name. For script tags I have this: <script.+src=.+(\.js|\.axd).+(</script>|>) It correctly matches both tags in the following html: <script src="Scripts/JScript1.js" type="text/javascript" /> <script type="text/javascript" src="Scripts/JScript2.js" /> However, when I do link tags with the following: <link.+href=.+(\.css).+(</link>|>) It matches all of this at once(eg it returns one match containing both items): <link href="Stylesheets/StyleSheet1.css" rel="Stylesheet" type="text/css" /> <link href="Stylesheets/StyleSheet2.css" rel="Stylesheet" type="text/css" /> What am I missing here? The regexes are essentially identical except for the text to match to? Also, I know that regex is not a great tool for HTML parsing...I will probably end up using the HtmlAgilityPack in the end, but this is driving me nuts and I want an answer if only for my own mental health!

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  • How to implement collection with covariance when delegating to another collection for storage?

    - by memelet
    I'm trying to implement a type of SortedMap with extended semantics. I'm trying to delegate to SortedMap as the storage but can't get around the variance constraints: class IntervalMap[A, +B](implicit val ordering: Ordering[A]) //extends ... { var underlying = SortedMap.empty[A, List[B]] } Here is the error I get. I understand why I get the error (I understand variance). What I don't get is how to implement this type of delegation. And yes, the covariance on B is required. error: covariant type B occurs in contravariant position in type scala.collection.immutable.SortedMap[A,List[B]] of parameter of setter underlying_=

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  • Jquery Validation

    - by Yashwant Chavan
    Hi, Is there is any to validate form using jquery on dynamic fields. I am creating form fields dynamically using Jsp. like <input type="text" name="name1" value=""> <input type="text" name="name2" value=""> <input type="text" name="name3" value=""> <input type="text" name="name4" value=""> so on.... I want to validate this form fields with required form field.

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  • How do I get intellisense to pop up?

    - by TheLearner
    How do I get intellisense to pop up while I am coding? I know it pops up when I start typing a known type e.g.: if I type NSS it will finish it for me NSString. How do I get it to give me a bunch of options like in Visual Studio e.g.: if I type NS I want to see what my options are like NSString, NSInteger etc? And if I have not typed anything I still want a bunch of options like all the instance variables etc.

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  • Parameter pack argument consumption

    - by yuri kilochek
    It is possible to get the first element of the parameter pack like this template <typename... Elements> struct type_list { }; template <typename TypeList> struct type_list_first_element { }; template <typename FirstElement, typename... OtherElements> struct type_list_first_element<type_list<FirstElement, OtherElements...>> { typedef FirstElement type; }; int main() { typedef type_list<int, float, char> list; typedef type_list_first_element<list>::type element; return 0; } but not possible to similary get the last element like this template <typename... Elements> struct type_list { }; template <typename TypeList> struct type_list_last_element { }; template <typename LastElement, typename... OtherElements> struct type_list_last_element<type_list<OtherElements..., LastElement>> { typedef LastElement type; }; int main() { typedef type_list<int, float, char> list; typedef type_list_last_element<list>::type element; return 0; } with gcc 4.7.1 complaining: error: 'type' in 'struct type_list_last_element<type_list<int, float, char>>' does not name a type What paragraps from the standard describe this behaviour? It seems to me that template parameter packs are greedy in a sense that they consume all matching arguments, which in this case means that OtherElements consumes all three arguments (int, float and char) and then there is nothing left for LastElement so the compilation fails. Am i correct in the assumption? EDIT: To clarify: I am not asking how to extract the last element from the parameter pack, i know how to do that. What i actually want is to pick the pack apart from the back as opposed to the front, and as such recursing all the way to the back for each element would be ineffective. Apparentely reversing the sequence beforehand is the most sensible choice.

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  • sending the data from form to db in django

    - by BharatKrishna
    I have a form in which I can input text through text boxes. How do I make these data go into the db on clicking submit. this is the code of the form in the template. <form method="post" action="app/save_page"> <p> Title:<input type="text" name="title"/> </p> <p> Name:<input type="text" name="name"/> </p> <p> Phone:<input type="text" name="phone"/> </p> <p> Email:<input type="text" name="email"/> </p> <p> <textarea name="description" rows=20 cols=60> </textarea><br> </p> <input type="submit" value="Submit"/> </form> I have a function in the views.py for saving the data in the page. But I dont know how to impliment it properly: def save_page(request): title = request.POST["title"] name = request.POST["name"] phone = request.POST["phone"] email = request.POST["email"] description = request.POST["description"] Now how do I send these into the db? And what do I put in views.py so that those data goes into the db? so how do I open a database connection and put those into the db and save it? should I do something like : connection=sqlite3.connect('app.db') cursor= connection.cursor() ..... ..... connection.commit() connection.close() Thank you.

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  • PHP radio button check if null

    - by Dallox
    So in class we get this school task where we need to check if one of the fields in unfilled and display an error. No we did this but for some strange reason it doesnt display a error when a radio button is unchecked. (textfield null check works fine) I've tried with a friend many possabilities but they all doesnt seem to work. We have been stuck at this task for 2 hours. Now we have tried making seperate if's but that doesnt seem to work too. These are the important parts: <p> <input type="hidden" name="taal" value="false"> Choose a language <input type="radio" name="taal" value="N"> Dutch <input type="radio" name="taal" value="E"> English <input type="radio" name="taal" value="S"> Spanish if (@$_POST['taal'] == null){ echo "No Language gotten"; return; }

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  • How can I decrease time opening myisam table in an "union all" of the same table??

    - by parm.95
    I have a myisam table with 2.5M rows, I use an union all to get my results as following: (SELECT t.id FROM t WHERE type=1 LIMIT 10) UNION ALL (SELECT t.id FROM t WHERE type=2 LIMIT 10) ... UNION ALL (SELECT t.id FROM t WHERE type=25 LIMIT 10) the time to opening the table t is about 6ms. With a single request: SELECT t.id FROM t WHERE type=1 LIMIT 10 the time is about 1ms. What I don't understand is why mysql spend more time to the same table in union all. It should recognize that is the same table and so just opening at the first union. Does anybody can help me to decrease the time for opening table in a "union all"? Thanks in advance!

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