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  • What Gotchas When Learning C++, If I came from PHP/Java?

    - by silent
    Hi, I need to learn C++ in order to learn building Nokia WRT and or maemo application. I need to know what gotchas and what aspect of C++ that I need/have to learn or focus more. One thing I got in my mind is that C++ doesn't have garbage collector. Therefor, I need to focus on variable type. But, is there any others that really important and I can't ignore it?

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  • How to handle ordering of @Rule's when they are dependant on eachother

    - by Lennart Schedin
    I use embedded servers that run inside Junit test cases. Sometimes these servers require a working directory (for example the Apache Directory server). The new @Rule in Junit 4.7 can handle these cases. The TemporaryFolder-Rule can create a temporary directory. A custom ExternalResource-Rule can be created for server. But how do I handle if I want to pass the result from one rule into another: import static org.junit.Assert.assertEquals; import java.io.*; import org.junit.*; import org.junit.rules.*; public class FolderRuleOrderingTest { @Rule public TemporaryFolder folder = new TemporaryFolder(); @Rule public MyNumberServer server = new MyNumberServer(folder); @Test public void testMyNumberServer() throws IOException { server.storeNumber(10); assertEquals(10, server.getNumber()); } /** Simple server that can store one number */ private static class MyNumberServer extends ExternalResource { private TemporaryFolder folder; /** The actual datafile where the number are stored */ private File dataFile; public MyNumberServer(TemporaryFolder folder) { this.folder = folder; } @Override protected void before() throws Throwable { if (folder.getRoot() == null) { throw new RuntimeException("TemporaryFolder not properly initialized"); } //All server data are stored to a working folder File workingFolder = folder.newFolder("my-work-folder"); dataFile = new File(workingFolder, "datafile"); } public void storeNumber(int number) throws IOException { dataFile.createNewFile(); DataOutputStream out = new DataOutputStream(new FileOutputStream(dataFile)); out.writeInt(number); } public int getNumber() throws IOException { DataInputStream in = new DataInputStream(new FileInputStream(dataFile)); return in.readInt(); } } } In this code the folder is sent as a parameter into the server so that the server can create a working directory to store data. However this does not work because Junit processes the rules in reverse order as they are defined in the file. The TemporaryFolder Rule will not be executed before the server Rule. Thus the root-folder in TempraryFolder will be null, resulting that any files are created relative to the current working directory. If I reverse the order of the attributes in my class I get a compile error because I cannot reference a variable before it is defined. I'm using Junit 4.8.1 (because the ordering of rules was fixed a bit from the 4.7 release)

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  • MySQL LEFT JOIN error

    - by Alex
    Hello, I've got some SQL that used to work with an older MySQL version, but after upgrading to a newer MySQL 5 version, I'm getting an error. Here's the SQL: SELECT portfolio.*, projects.*, types.* FROM projects, types LEFT JOIN portfolio ON portfolio.pfProjectID = projects.projectID WHERE projects.projectType = types.typeID AND types.typeID = #URL.a# ORDER BY types.typeSort, projects.projectPriority ASC and the new error I'm receiving: Unknown column 'projects.projectID' in 'on clause' How can I convert this to compatible SQL for the newer MySQL version? Thanks very much!

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  • Transformation of records 1 column 3 row -> 1 row 3 column

    - by Nehal Rupani
    First look at below query SELECT count(id) as total_record, id, modeller, MONTHNAME(completed_date) as current_month, Quarter(completed_date) as current_quarter, Difficulty, YEAR(completed_date) as current_year FROM model WHERE modeller != '' AND completed_date BETWEEN '2010-04-01' AND '2010-05-31' AND Difficulty != '' Group by Difficulty, Month(completed_date) Order by Month(completed_date) ASC Results I am getting is Modeller Month Year Difficulty ------------------------------------- XYZ Jan 2010 23 XYZ Jan 2010 14 XYZ Jan 2010 15 ABC Feb 2010 5 ABC Feb 2010 14 ABC Feb 2010 6 I want result like Modeller Month Year Difficulty -------------------------------------- XYZ Jan 2010 23, 14, 15 ABC Feb 2010 5, 14, 6 My database is Mysql for application i am developing so any help would be greatly appericated.

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  • mysql custom sorting first alpha then numeric using case when

    - by Nizzy
    How can you sort a query using ORDER BY CASE WHEN REGEXP? or other alternatives? I don't want to use UNION. Thank you mysql> SELECT `floor_id`, `floor_number` FROM `floors`; +----------+--------------+ | floor_id | floor_number | +----------+--------------+ | 1 | 4 | | 2 | 7 | | 3 | G | | 4 | 19 | | 5 | B | | 6 | 3 | | 7 | A | +----------+--------------+ Expected result: +----------+--------------+ | floor_id | floor_number | +----------+--------------+ | 7 | A | | 5 | B | | 3 | G | | 6 | 3 | | 1 | 4 | | 2 | 7 | | 4 | 19 | +----------+--------------+

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  • rails solr search limit total search results / get fixed number of results

    - by kLeos
    I'm trying to perform a search, order the results randomly, and only return a number of results, not all matches. Something like limit(2) I've tried using the Solr param 'rows' but that doesn't seem to do anything: @featured_articles = Article.search do with(:is_featured, true) order_by :random adjust_solr_params do |params| params[:rows] = 2 end end @featured_articles.total should be 2, but it returns more than 2 How can I get a randomized fixed number of results?

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  • Writing user agents to control Internet access

    - by gipsy
    Ho will I go about writing a light weight agent to be installed on machines (windows to begin with) that controls Internet access Also these agents need to communicate to central server over the Internet. What areas of technology I should start reading/learning in order to develop it myself?

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  • Strange problem publishing a fresh Ruby on Rails 3 application on localhost (Apache, Passenger and VirtualHosts)

    - by user502052
    I recently created a new Ruby on Rails 3 application locally on a Mac OS, named "test". Since I use apache2, in the private/etc/apache2/httpd.conf I set the VirtualHost for the "test" application: <VirtualHost *:443> ServerName test.pjtmain.localhost:443 DocumentRoot "/Users/<my_user_name>/Sites/test/public" RackEnv development <Directory "/Users/<my_user_name>/Sites/test/public"> Order allow,deny Allow from all </Directory> # SSL Configuration SSLEngine on ... </VirtualHost> <VirtualHost *:80> ServerName test.pjtmain.localhost DocumentRoot "/Users/<my_user_name>/Sites/test/public" RackEnv development <Directory "/Users/<my_user_name>/Sites/test/public"> Order allow,deny Allow from all </Directory> </VirtualHost> Of course I restart apache2, but trying to access to http://test.pjtmain.localhost/ I have this error message from: FIREFOX Oops! Firefox could not find test.pjtmain.localhost Suggestions: * Search on Google: ... SAFARI Safari can’t find the server. Safari can’t open the page “http://test.pjtmain.localhost/” because Safari can’t find the server “test.pjtmain.localhost”. I have other RoR3 applications setted like that above in the httpd.conf file and all them work. What is the problem (maybe it is not related to apache...)? Notes: 1. Using the 'Network Uility' I did a Ping with the following result: ping: cannot resolve test.pjtmain.localhost: Unknown host and I did a Lookup with the follonwing result: ; <<>> DiG 9.6.0-APPLE-P2 <<>> test.pjtmain.localhost +multiline +nocomments +nocmd +noquestion +nostats +search ;; global options: +cmd <MY_BROADBAND_TELECOMUNICATIONS_COMPANY_NAME>.com. 115 IN SOA dns1.<MY_BROADBAND_TELECOMUNICATIONS_COMPANY_NAME>.com. dnsmaster.<MY_BROADBAND_TELECOMUNICATIONS_COMPANY_NAME>.com. ( 2010110500 ; serial 10800 ; refresh (3 hours) 900 ; retry (15 minutes) 604800 ; expire (1 week) 86400 ; minimum (1 day) ) 2. I am using Phusion Passenger 3. Since I not changed nothing to the new "test" application, I expect to see the default RoR index.html page: 4. It seems that in the 'Console Messages' there is any warning or error

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  • printing stl containers with gdb 7.0

    - by Andrei
    I have installed GDB 7.0 and python per the following instructions. In the same manual, there is a mention of this file stl-views-1.0.3.gdb. What confuses me, is where should it be placed in order to enable pretty printing of stl containers. Would someone also explain to me all of this work? Thanks

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  • Microsoft Excel; Two conditions have to be true then be counted

    - by Chris Jones
    I'm working on a spreadsheet that two conditions have to true in order to be counted. If the month is January, and the number next to it is less than or equal to 30, then it's counted. Same rule applies for all the other months. Thus far, I have: =COUNTIFS(Sheet1!D2:D7,(SUMPRODUCT(--(MONTH(D2:D7)=1))),Sheet1!E2:E7,(COUNTIFS(E2:E7,"<=30"))) For example: Column D Jan 1, 2014 Feb 3, 2014 Feb 16, 2014 Mar 5, 2014 Mar 13, 2014 Mar 29, 2014 Column E 37 25 30 31 1 16 Outcome Jan 0 Feb 2 Mar 2

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  • Apache and PHP write permission?

    - by thedp
    Hello, I have a php script that writes to a file. But when I try to actually write to the file I get permission denied. How can I tell what user name I need to add to the file permission in order for the php to write to it? Thank you.

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  • I need to auto_increment a field in MySQL that is not primary key

    - by behrk2
    Hey everyone, Right now, I have a table whose primary key is an auto_increment field. However, I need to set the primary key as username, date (to ensure that there cannot be a duplicate username with a date). I need the auto_increment field, however, in order to make changes to row information (adding and deleting). What is normally done with this situation? Thanks!

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  • KeyPressed Event

    - by Asim Sajjad
    My Problem is that I want to check if the Arrow up or down key is press then I want to increment or decrement value in the textbox control. I have registered keyup event but I have to release the arrow up key in order to change the value, What I want is if User pressed up arrow key then it will increment the value until user release up arrow key and same for the down arrow key. Any idea?

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  • Where can I get the CUR files for the Firefox cursor values?

    - by harpo
    I'm using some of Firefox's specially-defined values for cursor, in particular -moz-zoom-in -moz-zoom-out -moz-grab -moz-grabbing In order to display these on other browsers, I'd like to deploy the equivalent CUR files — but I can't seem to find these online, or in my copy of Firefox. Anyone know where these are available?

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  • QueryString From Shared Function

    - by Kezzer
    I'm trying to get a query string from a shared function in a code-behind model using VB.NET. You have to use HttpContext.Current.Request.QueryString("Query") in order to get it from a shared function, however doing HttpContext.Current.Request.QueryString.Count gives back 0, which obviously isn't right in my case as there's many that exist. Is there some sort of issue with using this static call from a shared function?

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  • Mysql count columns

    - by Sergio
    I have a table for image gallery with four columns like: foid | uid | pic1 | pic2 | pic3 | date | ----------------------------------------------- 104 | 5 | 1.jpg | 2.jpg | 3.jpg | 2010-01-01 105 | 14 | 8.jpg | | | 2009-04-08 106 | 48 | x.jpg | y.jpg | | 2010-08-09 Mysql query for the user's galleries looks like: SELECT * FROM foto WHERE uid = $id order by foid DESC The thing that I want to do is count the number of images (PIC1, PIC2, PIC3) in every of the listed galleries. What is the best way for doing that?

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  • how to use timeuuid names in cassandra

    - by Marcin
    Hi guys, I have a problem, I would like to build logging system which will be using timeuuid type as a column name which will allow me ask for it later. Since for range queries order by time I need to use timeuuid type I would like to ask you how can I specify range queries for timeuuid column names if timeuuid is every time unique and I don't realy know the column name because of that I just know the time when it has been stored ? please help

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  • Enity framework not loading relationship even when using include

    - by dilbert789
    I have this code: Category selectedCategory = (from c in DB.Category.Include("SubCategory") join a in DB.Accessory on c.AccCatUID equals a.Category.AccCatUID where a.AccUID == currentAccessory.AccUID select c).FirstOrDefault(); It works fine, selectedCategory gets populated as expected. BUT selectedCategory has a child table 'SubCategory' which does not get loaded even though there is the include there. It is not loaded until I do this: selectedCategory.SubCategory.Load(); Why do I have to call load explicitly in order to load the child table?

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