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  • why is optional chaining required in an if let statement

    - by b-ryan ca
    Why would the Swift compiler expect me to write if let addressNumber = paul.residence?.address?.buildingNumber?.toInt() { } instead of just writing: if let addressNumber = paul.residence.address.buildingNumber.toInt() { } The compiler clearly has the static type information to handle the conditional statement for the first dereference of the optional value and each following value. Why would it not continue to do so for the following statements?

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  • Detect changes to user input controls in Silverlight?

    - by code
    I have a childwindow with a number of Textboxes, Comboboxes, and DatePickers. I want to know if a user has changed any value in these (to know if I need to save to db) One way I could think of doing this are in the 'on chg' event handlers and set bool. But if a user changes the value, in say a combobox, then changes back to the original this would still be seen as a change. Are there other alternatives? (note the project is not set up as MVVM) Thanks

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  • Get 10 Most Entered Entries PHP MYSQL

    - by Belgin Fish
    Hi, I'm just wondering if it's possible to retrieve the the most entered entries from the mysql database It's like this : ID - Value Id is auto increment, and value is the text that is being entered, i'd like to have it display the top 10 most entered terms, how could i do that?

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  • meteor mongodb _id changing after insert (and UUID property as well)

    - by lommaj
    I have meteor method that does an insert. Im using Regulate.js for form validation. I set the game_id field to Meteor.uuid() to create a unique value that I also route to /game_show/:game_id using iron router. As you can see I'm logging the details of the game, this works fine. (image link to log below) Meteor.methods({ create_game_form : function(data){ Regulate.create_game_form.validate(data, function (error, data) { if (error) { console.log('Server side validation failed.'); } else { console.log('Server side validation passed!'); // Save data to database or whatever... //console.log(data[0].value); var new_game = { game_id: Meteor.uuid(), name : data[0].value, game_type: data[1].value, creator_user_id: Meteor.userId(), user_name: Meteor.user().profile.name, created: new Date() }; console.log("NEW GAME BEFORE INSERT: ", new_game); GamesData.insert(new_game, function(error, new_id){ console.log("GAMES NEW MONGO ID: ", new_id) var game_data = GamesData.findOne({_id: new_id}); console.log('NEW GAME AFTER INSERT: ', game_data); Session.set('CURRENT_GAME', game_data); }); } }); } }); All of the data coming out of the console.log at this point works fine After this method call the client routes to /game_show/:game_id Meteor.call('create_game_form', data, function(error){ if(error){ return alert(error.reason); } //console.log("post insert data for routing variable " ,data); var created_game = Session.get('CURRENT_GAME'); console.log("Session Game ", created_game); Router.go('game_show', {game_id: created_game.game_id}); }); On this view, I try to load the document with the game_id I just inserted Template.game_start.helpers({ game_info: function(){ console.log(this.game_id); var game_data = GamesData.find({game_id: this.game_id}); console.log("trying to load via UUID ", game_data); return game_data; } }); sorry cant upload images... :-( https://www.evernote.com/shard/s21/sh/c07e8047-de93-4d08-9dc7-dae51668bdec/a8baf89a09e55f8902549e79f136fd45 As you can see from the image of the console log below, everything matches the id logged before insert the id logged in the insert callback using findOne() the id passed in the url However the mongo ID and the UUID I inserted ARE NOT THERE, the only document in there has all the other fields matching except those two! Not sure what im doing wrong. Thanks!

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  • Help with ejb 3, weblogic and spring.

    - by berserkpi
    So,hi there. I've created a simple EJB3 test project, the code is simple: @Stateless @Remote( { ISumaSimple.class }) public class SumaSimpleBean implements ISumaSimple { /** * Default constructor. */ public SumaSimpleBean() { // TODO Auto-generated constructor stub } @Override public int sumar(int a, int b) { // TODO Auto-generated method stub return a + b; } } public interface ISumaSimple { public int sumar(int a, int b); } Ok, my client is a stand alone spring aplication which configuration is: <bean id="sumaSimpleServicio" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiEnvironment"> <props> <prop key="java.naming.factory.initial"> org.apache.openejb.client.RemoteInitialContextFactory </prop> <prop key="java.naming.provider.url"> ejbd://localhost:4201 </prop> </props> </property> <property name="jndiName" value="SumaSimpleBeanRemote" /> </bean> <bean id="clienteService" class="qtx.cliente.simple.ClienteService"> <property name="sumaSimpleServicio" ref="sumaSimpleServicio"></property> </bean> All worked smoothly, but then I tried deploying using weblogic 10.3, I just changed these values: weblogic.jndi.WLInitialContextFactory t3://localhost:7010 In weblogic jndi tree my ejb is under: SimpleEJB3SimpleEJB_jarSumaSimple3_ISumaSimple Of course I added wlclient.jar to my spring client classpath. I think I am missing something in weblogic case, but dunno. My spring client is throwing this exception: Caused by: org.springframework.beans.TypeMismatchException: Failed to convert property value of type [qtx.ejb.simple._SumaSimple3_gwze0z_ISumaSimpleIntf_Stub] to required type [qtx.servicio.simple.ISumaSimple] for property 'sumaSimpleServicio'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [qtx.ejb.simple._SumaSimple3_gwze0z_ISumaSimpleIntf_Stub] to required type [qtx.servicio.simple.ISumaSimple] for property 'sumaSimpleServicio': no matching editors or conversion strategy found at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:391) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1288) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1249) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1010) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:472) ... 14 more Caused by: java.lang.IllegalArgumentException: Cannot convert value of type [qtx.ejb.simple._SumaSimple3_gwze0z_ISumaSimpleIntf_Stub] to required type [qtx.servicio.simple.ISumaSimple] for property 'sumaSimpleServicio': no matching editors or conversion strategy found at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:219) at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:138) at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:386) ... 18 more Any help would be appreciated.

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  • jquery on click sibling selection

    - by Deviland
    I generate a Table from a database to look like this <table id="items"> <thead> <tr> <th>Details</th> <th>Goldmine ID</th> <th>&nbsp;</th> </tr> </thead> <tbody> <tr> <td class="evenrow">This is a test Description generated through UNIT Tests for the category description</td> <td class="evenrow"><input type="text" value="" id="106" class="gminput"></td> <td class="butCell evenrow"><button class="saveButton updateitem">Update</button></td> </tr> <tr> <td class="oddrow">This is a test Description generated through UNIT Tests for the category description</td> <td class="oddrow"><input type="text" value="" id="107" class="gminput"></td> <td class="butCell oddrow"><button class="saveButton updateitem">Update</button></td> </tr> <tr> <td class="evenrow">This is a test Description generated through UNIT Tests for the category description</td> <td class="evenrow"><input type="text" value="" id="108" class="gminput"></td> <td class="butCell oddrow"><button class="saveButton updateitem">Update</button></td> </tr> </tbody> </table> I am trying to get the input box value and id returned by the relevant row's button click so far I have tried this but failed $('body').on('click', '.updateitem', function(event) { event.preventDefault(); $(this).parent().siblings().forEach(function(index) { alert(($(this).val())); }); var par = sib.parent('td'); par.addClass('redBorder'); });

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  • how to get the css keys and values for any html tag

    - by artsince
    I would like to dump all css key/value pairs for an html tag. In particular, I would like to learn the css properties for <audio> tag, so I can try to customize the look. document.getElementById('myaudio').style returns a CSSStyleDeclaration object but length returns 0 and I cannot figure out to iterate over the key/value pairs. Thank you

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  • question for jsp coding

    - by sheetal
    I am reteriving the set of values inside a table from database in a jsp page then it is in the form of link. Now I want to click that value and move to another jsp page. How to code the program so that it can recognise that value and it can move to the next desired page. But I unable to do that. please help me....

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  • Convert from float to QByteArray

    - by radix07
    Is there a quick way to convert a float value to a byte wise (hex) representation in a QByteArray? Have done similar with memcpy() before using arrays, but this doesn't seem to work too well with QByteArray. For example: memcpy(&byteArrayData,&floatData,sizeof(float)); Can go the other way just fine using: float *value= (float *)byteArrayData.data(); Am I just implementing this wrong or is there a better way to do it using Qt? Thanks

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  • C# xml Class to substitute ini files

    - by Eduardo
    Hi guys, I am learning Windows Forms in C#.NET 2008 and i want to build a class to work with SIMPLE xml files (config file like INI files), but i just need a simple class (open, getvalue, setvalue, creategroup, save and close functions), to substitute of ini files. I already did something and it is working but I am having trouble when I need to create different groups, something like this: <?xml version="1.0" encoding="utf-8"?> <CONFIG> <General> <Field1>192.168.0.2</Field1> </General> <Data> <Field1>Joseph</Field1> <Field2>Locked</Field2> </Data> </CONFIG> how can i specify that i want to read the field1 of [data] group? note that i have same field name in both groups (Field1)! I am using System.Linq, something like this: To open document: XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(FilePath); To save document: xmlDoc.Save(FilePath); To get value: public string getValue(string Field) { string result = ""; try { XmlNodeList xmlComum = xmlDoc.GetElementsByTagName(Field); if (xmlComum.Item(0) == null) result = ""; else result = xmlComum.Item(0).InnerText; } catch (Exception ex) { return ""; } return result; } To set value: public void setValue(string Group, string Field, string FieldValue) { try { XmlNodeList xmlComum = xmlDoc.GetElementsByTagName(Field); if (xmlComum.Item(0) == null) { xmlComum = xmlDoc.GetElementsByTagName(Group); if (xmlComum.Item(0) == null) { // create group createGroup(Group); xmlComum = xmlDoc.GetElementsByTagName(Group); } XmlElement xmlE = xmlDoc.CreateElement(Field); XmlText xmlT = xmlDoc.CreateTextNode(FieldValue); xmlE.AppendChild(xmlT); xmlComum.Item(0).AppendChild(xmlE); } else { // item already exists, just change its value xmlComum.Item(0).InnerText = Value; } xmlDoc.Save(FilePath); } catch (Exception ex) { } } The CreateGroup code: public void createGroup(string Group) { try { XmlElement xmlComum = xmlDoc.CreateElement(Group); xmlDoc.DocumentElement.AppendChild(xmlComum); xmlDoc.Save(FilePath); } catch (Exception ex) { } } Thank You!

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  • Silverlight 4: Binding to a calculation of control properties

    - by Rich.Carpenter
    What I would like to do is pretty simple. Given textboxes for ItemPrice, Tax and Total, I need the text value for Total to be bound to ItemPrice + Tax and the Tax value to display ItemPrice * taxRate. Could someone offer a brief explanation as to how this would be accomplished or point me to an appropriate example? I see property binding examples all over the place, but none that show binding to a calculation of the properties of two controls.

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  • Handling scroll event on listview in c#

    - by murasaki5
    I have a listview that generates thumbnail using a backgroundworker. When the listview is being scrolled i want to pause the backgroundworker and get the current value of the scrolled area, when the user stopped scrolling the listview, resume the backgroundworker starting from the item according to the value of the scrolled area. Is it possible to handle scroll event of a listview? if yes how? if not then what is a good alternative according to what i described above?

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  • Can we find out the difference between 2 RGb colors to find out a 3rd color?

    - by AK
    2 colors are mixed together. If i have the RGB for the resultant color and RGB for one of the colors mixed, then somehow i could calculate the 2nd color? I will try to explain visually what i am trying to say. Here is a flickr link http://www.flickr.com/photos/48150615@N08/4407414157 I know that the circle in the middle has an opacity of 20% Is there any way to know the color value of the circle so that i can deduct that to get the same color value as the background color.

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  • AWK -- How to do selective multiple column sorting?

    - by nawesita
    In awk, how can I do this: Input: 1 a f 1 12 v 2 b g 2 10 w 3 c h 3 19 x 4 d i 4 15 y 5 e j 5 11 z Desired output, by sorting numerical value at $5: 1 a f 2 10 w 2 b g 5 11 z 3 c h 1 12 v 4 d i 4 15 y 5 e j 3 19 x Note that the sorting should only affecting $4, $5, and $6 (based on value of $5), in which the previous part of table remains intact.

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  • ANTLR expressions rewrite intermediate tree

    - by user313856
    For expressions like 3+4 I would like to use the value 7 in an intermediate representation tree. I cannot work out how to get the returns value into a rewrite rule. expression returns [int v]: etc. How do I get expression.v into WR? At the moment I get (+ 3 4), I want (7) |^( WRITE c=expression) - ^(WRINT ^(INTC ^($c)) the next step is to emit 7 in an assembler.

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  • DLL configuration file in asp.net site

    - by Tominator
    Hi, I've made a .net 2.0 librabry project, that results in a dll. I've made an app.config file in my project, with settings used in the dll, with the intention that they can be changed later. I'm attempting to use the dll in an asp.net web application now, so I made the reference to my other project's output, and I see that the dll is copied over to the site's bin folder, and everything works. However, the configuration file is not copied. When I manually copy the app.config and rename it to myDll.config, it has no influence. The contents of the config file is approximately this: <?xml version="1.0" encoding="utf-8" ?> <configuration> <configSections> <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" > <section name="myDLL.My.MySettings" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" /> </sectionGroup> </configSections> <applicationSettings> <myDLL.My.MySettings> <setting name="myDLL_webservice_Service" serializeAs="String"> <value>https://myhost/Service.asmx</value> </setting> <setting name="ID" serializeAs="String"> <value>6</value> </setting> </myDLL.My.MySettings> </applicationSettings> </configuration> And I use its settings in the dll with this (vb.net code): Private _id As Long = My.Settings.ID How can I put my config information somewhere so it can be used? In the web.config of the site application? That has only the appSettings section, and it uses the syntax. It doesn't appear to work though. In a custom file format that I create and use? Not that pretty..

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  • How do you replace content without losing focus?

    - by Ryan
    For example: <input type="text" name="test" onChange="document.formname.test.value=.document.formname.test.value.replace('something','something else')" /> The replace function works but it loses focus on every change How do you make it not lose focus? What I'm trying to do is make it so that certain text is immediately replaced with new text when its typed but you can continue typing

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  • post row where radio button is checked

    - by ognjenb
    View: <form id="numbers-form" method="post" action="/Numbers/Numbers"> <table id="numbers"> <tr> <th> prvi_br </th> <th> drugi_br </th> <th> treci_br </th> </tr> <% int rb = 1; %> <% foreach (var item in Model) { %> <tr> <td> <%= Html.Encode(item.prvi_br) %> <input type="radio" name="<%= Html.Encode(rb) %>" value="<%= Html.Encode(rb) %>" id='<%= Html.Encode(item.prvi_br) %>'/> </td> <td> <%= Html.Encode(item.drugi_br) %> <input type="radio" name="<%= Html.Encode(rb)%>" value="<%= Html.Encode(rb) %>" id='<%= Html.Encode(item.drugi_br) %>'/> </td> <td> <%= Html.Encode(item.treci_br) %> <input type="radio" name="<%= Html.Encode(rb)%>" value="<%= Html.Encode(rb) %>" id='<%= Html.Encode(item.treci_br) %>'/> </td> </tr> <% rb++; %> <% } %> </table> <p> <input type="submit" value="Save" /> </p> </form> Controller action: [HttpPost] public ActionResult Numbers(int[] rb) { brojevi br = new brojevi(); for (int i = 1; i <= rb.Length; i++) //in this line I have error:Object reference not set to an instance of an object. { br.prvi_br = i; br.drugi_br = i+1; br.treci_br = i+3; } numbers.AddTobrojevi(br); numbers.SaveChanges(); return View(); } I try to post data row in wich radio button is checked but failed, what is wrong??

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  • deep or shallow copying?

    - by Dervin Thunk
    Dear all. I was wondering if there are examples of situations where you would purposefully pass an argument by value (deep copy) in C. For instance, passing a char to a function is usually cheaper in space than passing a char* (if there's no need to share the value), since char is 1 byte and pointers are, well, whatever they are in the architecture (4 in my 32 bit machine). ?(When) do you want to pass (big) deep copies to functions? if so, why?

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  • How to declare ASP classic constants to a data type?

    - by Guy
    In asp classic and vbscript, you can declare a Const with a hexidecial value, and a date type value: Const C_LIGHTCYAN = &hCCFFEE Const C_STARTDATE = #1 JAN 2000# But how can I declare currency, single or doubles data types? Const C_LONG = 1024 '# I want this to be a LONG, not an INT! I'm sure I've seen something like Const C_LNG = L12345 or some other prefix/suffix combination for longs or doubles but can't find the source now

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