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• load multiple directions in parallel in google map

  - by Maneesh

  My aim is to get distance between many locations thru GDirection object. Since I am using multiple objects, am not able to get distnace. Can someone help me out. Below is the code. for(ct=0;ct<size;ct++) { var gd=new GDirections(); gd.load("from: " + address + " to: " + offaddress[ct]); GEvent.addListener(directions,"load", function() { sor[ct]= gd.getDistance().html; }

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• Django DecimalField returns "None" instead of empty value

  - by Ed

  Is there a way to force django to display nothing instead of "None" for a Decimal Field that's been left blank? In my template, I show a list of all the values for a particular field. Each value is hyperlinked to a page that displays the results of a query filtered on that value. But because there are some entries with null value, my list includes actual DecimalField entries and "None" for all those that are empty. When a user clicks on None, django throws a validation error because you cannot query a DecimalField using a string. I could write if statements checking all instances of decimal fields for Nones and skipping them, but that is far from an elegant solution. Any advice? This is one part of the code, though there are other templates that derive the None value in slightly different manners: {% for item in choices %} <a href={% url app_views.field_choice item %}>{{ item }}</a><br> {% endfor %}

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• How do I migrate a ManyToOne to a ManyToMany relationship in Hibernate?

  - by spderosso

  I have a instance field of a class X that is mapped using Hibernate as a Many to One relationship. E.g: public class X{ ... @ManyToOne(optional=false) private Y iField; ... } That is correctly working with a particular schema. I know want to change this instance field iField to a List and a Many to Many relationship. public class X{ ... @ManyToMany(optional=false) private List<Y> iField; ... } What steps should I follow? Do I have to change the schema? in which way? In case you need more info let me know. Thanks!

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• MapKit Annotations and User location

  - by teddafan

  Hi all, I followed this tutorial to make my first app: http://icodeblog.com/2009/12/21/introduction-to-mapkit-in-iphone-os-3-0/ I would really like to know how to sort the annotations in the Table in order of distance to the user (the nearest annotation is the first one on the table) How is it possible to do that? I understand that I must use the CLLocation to find the user's location but then I have no idea. Could any one help me? Cheers, Thank you in advance for your much appreciated help, teddafan

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• bitwise AND in Javascript with a 64 bit integer

  - by Toby Hede

  I am looking for a way of performing a bitwise AND on a 64 bit integer in JavaScript. JavaScript will cast all of its double values into signed 32-bit integers to do the bitwise operations (details here).

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• Referencing the last row's data in Crystal Report

  - by yeahumok

  I have a report where the fields come from data pulled from a SQL server. I have a total field that i have added to the report...however i have an interesting conundrum--i was hoping someone had a formula i could use. Three of my columns do NOT need summation...however my project requirements are telling me instead to just pull the last number from the last row in the report and putting that in the total row. To better clarify: 1999 0.1% 0.2% 0.3% 2001 -2% 0.3% 3.4% Basically, in the total field, i'd be pulling the values from 2001 since it is the last report row. In my total row, i want to have -2%, 0.3% and 3.4% showing (since those are the last row's values). SO basically, i just want to pull the last report row's data (NOT total it). Anybody have a formula i can use for this?

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• Jquery UI accordion question - how would you approach this?

  - by E.J. Brennan

  I am using jquery UI accordion control in one of my apps asp.net apps. The data for the accordion comes from a database, and each database record has an ID, a Title Field and a content field. The title is the heading, and the content is the data that shows up when the draw is opened... I'd like to be able to call my page like this: http://www.mywebsite.com/mypage.aspx?ID=123 and have it display all the data (as it does now), but then have the default 'drawer' of the accordion open to the section that corresponds to the ID number passed in on the url...there are about 50 sections on the page. Any suggestions on how to approach this? My questions is specific to the jquery accordion function, the rest I know. So where would be the best place to 'tag' the drawer with the unique ID's, and then what is the snippet of javascript code (I assume) that I would use 'open' that drawer based on the ID passed in?? Thanks!

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• Question about C behaviour for unsigned integer underflow

  - by nn

  I have read in many places that integer overflow is well-defined in C unlike the signed counterpart. Is underflow the same? For example: unsigned int x = -1; // Does x == UINT_MAX? Thanks. I can't recall where, but i read somewhere that arithmetic on unsigned integral types is modular, so if that were the case then -1 == UINT_MAX mod (UINT_MAX+1).

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• CakePHP HABTM: Editing one item casuses HABTM row to get recreated, destroys extra data

  - by leo-the-manic

  I'm having trouble with my HABTM relationship in CakePHP. I have two models like so: Department HABTM Location. One large company has many buildings, and each building provides a limited number of services. Each building also has its own webpage, so in addition to the HABTM relationship itself, each HABTM row also has a url field where the user can visit to find additional information about the service they're interested and how it operates at the building they're interested in. I've set up the models like so: <?php class Location extends AppModel { var $name = 'Location'; var $hasAndBelongsToMany = array( 'Department' => array( 'with' => 'DepartmentsLocation', 'unique' => true ) ); } ?> <?php class Department extends AppModel { var $name = 'Department'; var $hasAndBelongsToMany = array( 'Location' => array( 'with' => 'DepartmentsLocation', 'unique' => true ) ); } ?> <?php class DepartmentsLocation extends AppModel { var $name = 'DepartmentsLocation'; var $belongsTo = array( 'Department', 'Location' ); // I'm pretty sure this method is unrelated. It's not being called when this error // occurs. Its purpose is to prevent having two HABTM rows with the same location // and department. function beforeSave() { // kill any existing rows with same associations $this->log(__FILE__ . ": killing existing HABTM rows", LOG_DEBUG); $result = $this->find('all', array("conditions" => array("location_id" => $this->data['DepartmentsLocation']['location_id'], "department_id" => $this->data['DepartmentsLocation']['department_id']))); foreach($result as $row) { $this->delete($row['DepartmentsLocation']['id']); } return true; } } ?> The controllers are completely uninteresting. The problem: If I edit the name of a Location, all of the DepartmentsLocations that were linked to that Location are re-created with empty URLs. Since the models specify that unique is true, this also causes all of the newer rows to overwrite the older rows, which essentially destroys all of the URLs. I would like to know two things: Can I stop this? If so, how? And, on a less technical and more whiney note: Why does this even happen? It seems bizarre to me that editing a field through Cake should cause so much trouble, when I can easily go through phpMyAdmin, edit the Location name there, and get exactly the result I would expect. Why does CakePHP touch the HABTM data when I'm just editing a field on a row? It's not even a foreign key!

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• Facebook connect integration (registration & login)

  - by nikospkrk

  Hi, I'm really struggling to make facebook connection working for my system. What I want to do : When the user is not yet registered on facebook : Fetch some user profile fields into my database (ideqally via my registration page already working for non facebook users) Log the user into my website Redirect the user into my homepage What I've done so far : Set up the application in FB Add the Facebook class from the github website and integrate some code to make it working Add additionnal paremeters to login/register facebook link. I'm struggling to redirect the user after authorizing, to my register page (register/?facebook). The "Post-Authorize Redirect URL" field doesn't seem to work properly, I maybe do not fill the right field? My other question is, if my registration page uses a redirection show (index.php redirect to register.php), do the information given by facebook through the $_POST method would be available in the register.php page ? I don't think so, do you ? Regards, Nicolas.

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• Pros and cons of ways of storing an unsigned int without an unsigned int data type

  - by fields

  I have values that are 64-bit unsigned ints, and I need to store them in mongodb, which has no unsigned int type. I see three main possibilities for storing them in other field types, and converting on going in and out: Using a signed int is probably easiest and most space efficient, but has the disadvantage that they're not human readable and if someone forgets to do the conversion, some of them will work, which may obscure errors. Raw binary is probably most difficult for inexperienced programmers to deal with, and also suffers from non-human-readability. A string representation is the least space efficient (~40 bytes in unicode vs 8 bytes per field), but then at least all of the possible values will map properly, and for querying only a conversion to string is required instead of a more complicated conversion. I need these values to be available from different platforms, so a single driver-specific solution isn't an option. Any major pros and cons I've missed? Which one would you use?

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• MYSQL query to get all entries with specific time, from PHP?

  - by meds

  I'm trying to query a mysql table which places its date in the following format: yyyy-mm-dd hh:mm:ss So it's date and time, and that's all in a single field. Now from php I want to get the time and query the table to only return entries where the date field is less than 24 hours old. I'm having issues with the system because PHPs get time seems to return the values seperately and I'm struggling to figure out how to make it work with mysql queries. This seems fairly simple but I'm quite new to php so sorry if I'm completely missing something..

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• C# Language Design: explicit interface implementation of an event

  - by ControlFlow

  Small question about C# language design :)) If I had an interface like this: interface IFoo { int Value { get; set; } } It's possible to explicitly implement such interface using C# 3.0 auto-implemented properties: sealed class Foo : IFoo { int IFoo.Value { get; set; } } But if I had an event in the interface: interface IFoo { event EventHandler Event; } And trying to explicitly implement it using field-like event: sealed class Foo : IFoo { event EventHandler IFoo.Event; } I will get the following compiler error: error CS0071: An explicit interface implementation of an event must use event accessor syntax I think that field-like events is the some kind of dualism for auto-implemented properties. So my question is: what is the design reason for such restriction done?

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• SQL Like question

  - by mike

  Is there a way to reverse the SQL Like operator so it searches a field backwards? For example, I have a value in a field that looks like this "Xbox 360 Video Game". If I write a query like below, it returns the result fine. SELECT id FROM table WHERE title like "%Xbox%Game%" However, when I search like this, it doesn't find any results. SELECT id FROM table WHERE title like "%Video%Xbox%" I need it to match in any direction. How can I get around this?

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• What are the prerequisites for learning embedded systems programming ?

  - by WarDoGG

  I have completed my graduation in Computer engineering. We had some basic electronics courses in Digital signal processing, Information theory etc but my primary field is Programming. However, i was looking to get into Embedded sytems programming with NO knowledge of how it is done. However, i am very keen on going into this field. My questions : what are the languages used to program embedded system programs ? Will i be able to learn without having any basics in electronics ? any other prerequisites that i should know ?

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• How come module-level validators are evaluated only after property-level validators?

  - by jonathanconway

  I'm using the module-level validator: 'PropertiesMustMatch' on my view-model, like so: [PropertiesMustMatch("Password", "PasswordConfirm")] public class HomeIndex { [Required] public string Name { get; set; } public string Password { get; set; } public string PasswordConfirm { get; set; } } I'm noticing that if I submit the form without Name filled in, the ValidationSummary() helper returns only the following error: The Name field is required. However, if I fill in Name, then ValidationSummary() will return a PropertiesMustMatch error: 'Password' and 'PasswordConfirm' do not match. So it looks like the property-level validators are being evaluated first, then the model-level validators. I would much prefer if they were all validated at once, and ValidationSummary would return: The Name field is required. 'Password' and 'PasswordConfirm' do not match. Any ideas what I can do to fix this? I'm studying the MVC 2 source-code to try to determine why this happens.

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• angular, try to display object in ng-repeat fails

  - by Simone M

  i'm writing an mobile application in javascript with angularJS and ionicframework (last beta v.11), i create dinamically an object and want to display all objects inside in a ng-repeat. Why nr-repeat don't display anything? This is screen from my object: I use this code for put values in scope: $scope.distanceSuppliers = myCar; And this is the code in html: <ion-item ng-repeat="(id, supplier) in distanceSuppliers"> <div class="items item-button-right" ng-click="openDetails(id)"> {{supplier.name}}<br /> {{supplier.address}}<br /> </div> </ion-item> This is my complete code for JS: .controller('suppliers', function($scope, cw_db, $ionicPopup, $ionicActionSheet, appdelegate, $rootScope, $firebase, $location, $ionicLoading, cw_position) { $ionicLoading.show({ template: 'Updating data..' }); var geocoder; var tot = 0; var done = 0; geocoder = new google.maps.Geocoder(); cw_db.getData(cw_db.getSuppliers(), "", function(suppliers) { cw_position.getPosition(function (error, position) { suppliers.on('value', function(supp) { $scope.distanceSuppliers = {}; tot = 0; done = 0; supp.forEach(function(childSnapshot) { tot++; var childData = childSnapshot.val(); if (childData.address) { calculateDistance(childData, position.coords.latitude, position.coords.longitude); } }); }); $ionicLoading.hide(); }); }); function calculateDistance(childData, usrLat, usrLon) { var service = new google.maps.DistanceMatrixService(); service.getDistanceMatrix( { origins: [new google.maps.LatLng(usrLat, usrLon)], destinations: [childData.address], travelMode: google.maps.TravelMode.DRIVING, unitSystem: google.maps.UnitSystem.METRIC, avoidHighways: false, avoidTolls: false }, function(response, status) { if (status != google.maps.DistanceMatrixStatus.OK) { alert('Error was: ' + status); } else { done++; var results = response.rows[0].elements; childData.distance = results[0].distance.value; $scope.distanceSuppliers.push(childData); if (done == tot) { console.log($scope.distanceSuppliers); } } }); } $scope.openDetails = function(index) { //appdelegate.setCallId(index); //$location.path("/app/supplierDetails"); } }) what's wrong?

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• How to assign default values and define unique keys in Entity Framework 4 Designer

  - by csharpnoob

  Hello, I've had a look at the Entity Framework 4. While generating code for the SQL Server 2008 I came to the point where I want to define some default values for some fields. how to define in the designer for a Created DateTime Field the DateTime.Now default value? - Error 54: Default value (DateTime.Now) is not valid for DateTime. The value must be in the form 'yyyy-MM-dd HH:mm:ss.fffZ' how to make for code generation a string Field unique. Like E-Mail or Username can exists only once in the table. I've search alot in the internet and also checked my books Pro Entity Framework 4.0 and Programming Entity Framework. But none of them seems to come up with the default value issue, or using sql commands as default values for database generation. Another thing is, how to prevent on database generation always from droping tables? Instead i want to append non existing fields and keep the data. Thanks for any suggestions.

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• DynamicMethod NullReferenceException

  - by Jeff

  Can anyone tell me what's wrong with my IL code here? IL_0000: nop IL_0001: ldarg.1 IL_0002: isinst MyXmlWriter IL_0007: stloc.0 IL_0008: ldloc.0 IL_0009: ldarg.2 IL_000a: ldind.ref IL_000b: unbox.any TestEnum IL_0010: ldfld Int64 value__/FastSerializer.TestEnum IL_0015: callvirt Void WriteValue(Int64)/System.Xml.XmlWriter IL_001a: nop IL_001b: ret I'm going crazy here, since I've written a test app which does the same thing as above, but in C#, and in reflector the IL code from that looks just like my DynamicMethod's IL code above (except my test C# app uses a TestStruct with a public field instead of the private value field on the enum above, but I have skipVisibility set to true)... I get a NullReferenceException. My DynamicMethod's signature is: public delegate void DynamicWrite(IMyXmlWriter writer, ref object value, MyContract contract); And I'm definitely not passing in anything null. Thanks in advance!

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• How to check for empty values on two fields then prompt user of error using javascript

  - by Matthew

  Hello guys, I hope I can explain this right I have two input fields that require a price to be entered into them in order for donation to go through and submit. The problem that I am having is that I would like the validation process check to see if one of the two fields has a value if so then proceed to submit. If both fields are empty then alert. This is what I have in place now: function validate_required(field,alerttxt) { with (field) { if (value==null||value=="") {alert(alerttxt);return false;} else {return true} } } function validate_form(thisform) { with (thisform) { if (validate_required(input1,"Need a donation amount to continue")==false) {input1.focus();return false;} else if (validate_required(input2,"Need a donation amount to continue")==false) {input2.focus();return false;} } } I would like to ultimately like to get this over to Jquery as well Thanks guys any help would do Matt

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• Order a MySQL result by Date and Time in PHP

  - by DomingoSL

  Hi, i have this code: $datos = mysql_query("SELECT * FROM `usuarios` LIMIT 0, 30 "); Who is a simple MySQL query in php, but i need the result organized by date and time. There is a field in my table who has this value (automatic inserted when the user sing up in my page). So the table is something like this: Id Name DT 1 Domingo 2010-04-26 23:00:00 2 Cesar 2010-04-25 12:00:00 3 Nataly 2010-04-26 08:00:00 DT is a "datetime" field. How can i get the result order by new to old? Thanks!

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• Lost cert for published app

  - by John in MD

  I have a free app published in Android market. I have lost the certificate used to sign the current version but I want to publish an updated version. Android market refuses to accept my upgrade because it is signed by a new certificate. I realize the users will have to uninstall the current version to get the upgrade but it's not clear how to get the updated version into the market so that the current users will find it. What are my options? Thanks, John

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• FxCop giving a warning on private constructor CA1823 and CA1053

  - by Luis Sánchez

  I have a class that looks like the following: Public Class Utilities Public Shared Function blah(userCode As String) As String 'doing some stuff End Function End Class I'm running FxCop 10 on it and it says: "Because type 'Utilities' contains only 'static' ( 'Shared' in Visual Basic) members, add a default private constructor to prevent the compiler from adding a default public constructor." Ok, you're right Mr. FxCop, I'll add a private constructor: Private Utilities() Now I'm having: "It appears that field 'Utilities.Utilities' is never used or is only ever assigned to. Use this field or remove it." Any ideas of what should I do to get rid of both warnings?

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• Change input text to regular text on blur and ability to edit jQuery

  - by eknown

  I'm creating a form where I'm eliminating the use of a save button. The form is made up of input text boxes and textareas. After the user enters data into the input field, I want to trigger an onBlur function and change the input into a span that contains the information that the user entered. I also want to have the ability to edit this information, so if the user clicks on the newly created span with text, it will turn back into the input field with the current information for their editing pleasure. For reference, I'm looking to have a functionality pretty much like on editing a photo title on Flickr. If possible, I'd also like to have the textbox show "saving..." for half a second after the blur to reflect interaction with server.

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• Computed properties in NHibernate

  - by Liron Levi

  I'm having a problem in mapping an existing data class member to the database.. I have a database table where one of the columns is a string type, but actually stores a comma separated list of numbers. My data class shows this field as a list of integers. The problem is that I couldn't find any hook in NHibernate that allows me to invoke the custom code that is required to replace the string field by the list and vice versa. To illustrate (simplified of course): The database table: CREATE TABLE dummy ( id serial, numlist text -- (can store values such as '1,2,3') ) The data class: class Dummy { public int Id; public List<int> NumbersList; } Can anyone help?

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