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  • "One of the request inputs not valid" error when attempting to update Azure Table Storage

    - by sako73
    I am attempting to update an entry in Azure Table Storage. The function is: public void SaveBug(DaBug bug) { bug.PartitionKey = "bugs"; bug.Timestamp = DateTime.UtcNow; if (bug.RowKey == null || bug.RowKey == string.Empty) { bug.RowKey = Guid.NewGuid().ToString(); _context.AddObject(c_TableName, bug); } else { _context.AttachTo(c_TableName, bug); _context.UpdateObject(bug); } _context.SaveChanges(); } If it is a new entry (the "bug.RowKey == null" path), then it works fine. If it is an update to an existing entity, then the "AttachTo", and the "UpdateObject" calls work, but when it gets to "SaveChanges", it throws the "One of the request inputs not valid" exception. The class that is being stored is: [DataContract] [DataServiceKey("RowKey")] public class DaBug { [DataMember] public bool IsOpen { get; set; } [DataMember] public string Title { get; set; } [DataMember] public string Description { get; set; } [DataMember] public string SubmittedBy { get; set; } [DataMember] public DateTime SubmittedDate { get; set; } [DataMember] public string RowKey { get; set; } public DateTime Timestamp { get; set; } public string PartitionKey { get; set; } } Does anyone know what the problem is? Thanks for any help.

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  • how to do asynchronous http requests with epoll and python 3.1

    - by flow
    there is an interesting page http://scotdoyle.com/python-epoll-howto.html about how to do asnchronous / non-blocking / AIO http serving in python 3. there is the tornado web server which does include a non-blocking http client. i have managed to port parts of the server to python 3.1, but the implementation of the client requires pyCurl and seems to have problems (with one participant stating how ‘Libcurl is such a pain in the neck’, and looking at the incredibly ugly pyCurl page i doubt pyCurl will arrive in py3+ any time soon). now that epoll is available in the standard library, it should be possible to do asynchronous http requests out of the box with python. i really do not want to use asyncore or whatnot; epoll has a reputation for being the ideal tool for the task, and it is part of the python distribution, so using anything but epoll for non-blocking http is highly counterintuitive (prove me wrong if you feel like it). oh, and i feel threading is horrible. no threading. i use stackless. people further interested in the topic of asynchronous http should not miss out on this talk by peter portante at PyCon2010; also of interest is the keynote, where speaker antonio rodriguez at one point emphasizes the importance of having up-to-date web technology libraries right in the standard library.

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  • C#: Regex to extract portions of file name

    - by jakesankey
    I have text files formatted as such: R156484COMP_004A7001_20100104_065119.txt I need to consistently extract the R****COMP, the 004A7001 number, 20100104 (date), and don't care about the 065119 number. the problem is that not ALL of the files being parsed have the exact naming convention. some may be like this: R168166CRIT_156B2075_SU2_20091223_123456.txt or R285476COMP_SU1_125A6025_20100407_123456.txt So how could I use regex instead of split to ensure I am always getting that serial (ex. 004A7001), the date (ex. 20100104), and the R****COMP (or CRIT)??? Here is what I do now but it only gets the files formatted like my first example. if (file.Count(c => c == '_') != 3) continue; and further down in the code I have: string RNumber = Path.GetFileNameWithoutExtension(file); string RNumberE = RNumber.Split('_')[0]; string RNumberD = RNumber.Split('_')[1]; string RNumberDate = RNumber.Split('_')[2]; DateTime dateTime = DateTime.ParseExact(RNumberDate, "yyyyMMdd", Thread.CurrentThread.CurrentCulture); string cmmDate = dateTime.ToString("dd-MMM-yyyy");

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  • Spring Test / JUnit problem - unable to load application context

    - by HDave
    I am using Spring for the first time and must be doing something wrong. I have a project with several Bean implementations and now I am trying to create a test class with Spring Test and JUnit. I am trying to use Spring Test to inject a customized bean into the test class. Here is my test-applicationContext.xml: <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="............."> <bean id="MyUuidFactory" class="com.myapp.UuidFactory" scope="singleton" > <property name="typeIdentifier" value="CLS" /> </bean> <bean id="ThingyImplTest" class="com.myapp.ThingyImplTest" scope="singleton"> <property name="uuidFactory"> <idref local="MyUuidFactory" /> </property> </bean> </beans> The injection of MyUuidFactory instance goes along with the following code from within the test class: private UuidFactory uuidFactory; public void setUuidFactory(UuidFactory uuidFactory) { this.uuidFactory = uuidFactory; } However, when I go to run the test (in Eclipse or command line) I get the following error (stack trace omitted for brevity): Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'MyImplTest' defined in class path resource [test-applicationContext.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'java.lang.String' to required type 'com.myapp.UuidFactory' for property 'uuidFactory'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [com.myapp.UuidFactory] for property 'uuidFactory': no matching editors or conversion strategy found Funny thing is, the Eclipse/Spring XML editor shows errors of I misspell any of the types or idrefs. If I leave the bean in, but comment out the dependency injection, everything work until I get a NullPointerException while running the test...which makes sense.

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  • code review: Is it subjective or objective(quantifiable) ?

    - by Ram
    I am putting together some guidelines for code reviews. We do not have one formal process yet, and trying to formalize it. And our team is geographically distributed We are using TFS for source control (used it for tasks/bug tracking/project management as well, but migrated that to JIRA) with VS2008 for development. What are the things you look for when doing a code review ? These are the things I came up with Enforce FXCop rules (we are a Microsoft shop) Check for performance (any tools ?) and security (thinking about using OWASP- code crawler) and thread safety Adhere to naming conventions The code should cover edge cases and boundaries conditions Should handle exceptions correctly (do not swallow exceptions) Check if the functionality is duplicated elsewhere method body should be small(20-30 lines) , and methods should do one thing and one thing only (no side effects/ avoid temporal coupling -) Do not pass/return nulls in methods Avoid dead code Document public and protected methods/properties/variables What other things do you generally look for ? I am trying to see if we can quantify the review process (it would produce identical output when reviewed by different persons) Example: Saying "the method body should be no longer than 20-30 lines of code" as opposed to saying "the method body should be small" Or is code review very subjective ( and would differ from one reviewer to another ) ? The objective is to have a marking system (say -1 point for each FXCop rule violation,-2 points for not following naming conventions,2 point for refactoring etc) so that developers would be more careful when they check in their code.This way, we can identify developers who are consistently writing good/bad code.The goal is to have the reviewer spend about 30 minutes max, to do a review (I know this is subjective, considering the fact that the changeset/revision might include multiple files/huge changes to the existing architecture etc , but you get the general idea, the reviewer should not spend days reviewing someone's code) What other objective/quantifiable system do you follow to identify good/bad code written by developers? Book reference: Clean Code: A handbook of agile software craftmanship by Robert Martin

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  • Rle Encoding...What's the wrong?

    - by FILIaS
    I'm trying to make a Rle Encoder Programme.I read the way it works on notes on net. And i tried to fix my code! Regardless I think that the structure and logic of code are right,the code doesnt work! It appears some strange 'Z' as it runs. I really cant find what;s wrong! Could u please give me a piece of advice? Thanx in advance... #include <stdio.h> int main() { int count; unsigned char currChar,prevChar=EOF; while(currChar=getchar() != EOF) { if ( ( (currChar='A')&&(currChar='Z') ) || ( (currChar='a')&&(currChar='z') ) ) { printf("%c",currChar); if(prevChar==currChar) { count=0; currChar=getchar(); while(currChar!='EOF') { if (currChar==prevChar) count++; else { if(count<=9) printf("%d%c",count,prevChar); else { printf("%d%c",reverse(count),prevChar); } prevChar=currChar; break; } } } else prevChar=currChar; if(currChar=='EOF') { printf("%d",count); break; } } else { printf("Error Message:Only characters are accepted! Please try again! False input!"); break; } } return 0; } int reverse(int x) { int piliko,ypoloipo,r=0; x=(x<0)?-x:x; while (x>0) { ypoloipo=x%10; piliko=x/10; r=10*r+ypoloipo; x=piliko; } printf("%d",r); return 0; }

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  • GWT Internationalization throws an exception while rebinding

    - by Stephane Grenier
    I'm trying to internationalize a test application with GWT following the instruction and I have: com.example.client.MyConstants.java com.example.client.MyConstants_en.properties com.example.client.MyConstants_fr.properties com.example.client.MyAppEntryPoint.java In this code I have: public interface MyConstants extends Constants { @DefaultStringValue("HelloWorld") String hellowWorld(); } And public class MyAppEntryPoint implements EntryPoint { public void onModuleLoad() { MyConstants constants = GWT.create(MyConstants.class); VerticalPanel mainPanel = new VerticalPanel(); mainPanel.add(new Label(constants.hellowWorld())); RootPanel.get("myContainer").add(mainPanel); } } For MyApp.gwt.xml I have: <module rename-to="myModule"> <inherits name="com.google.gwt.xml.XML" /> <inherits name="com.google.gwt.i18n.I18N"/> <inherits name='com.google.gwt.user.theme.standard.Standard'/> <!-- Specify the app entry point class. --> <entry-point class='com.example.client.MyAppEntryPoint'/> <extend-property name="locale" values="en,fr"/> </module> In the html I have: ... It all seems to work as long as I don't include in the xml file. As soon as I do, I get the following exception: [ERROR] Generator 'com.google.gwt.i18n.rebind.LocalizableGenerator' threw threw an exception while rebinding 'com.example.client.myConstants' java.lang.NullPointerException: null ... Any help would be greatly appreciated on why it's throwing the exception. -

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  • Amazon Web services - retrieving a wishlist

    - by izb
    I've been tinkering with Yahoo Pipes and the Amazon E-Commerce Service (ECS) SDK to retrieve my wishlist. The problem is that although I can get all the items on my wishlist just fine, it seems to include items that I've deleted too. Has anyone else used this API and noticed this? Is there a way around it? UPDATE: Requested additional information in comments... Here is the URL I use to fetch the wishlist XML: http://webservices.amazon.co.uk/onca/xml?SubscriptionId=[my subs id]&Service=AWSECommerceService&ResponseGroup=ListItems&ProductPage=1&ProductGroup=Book&Operation=ListLookup&ListType=WishList&ListId=[my list id] And here is the relevant part of the XML response: <ListId>[my list id]</ListId> <ListName>Wishlist</ListName> <TotalItems>132</TotalItems> <TotalPages>14</TotalPages> <ListItem> <ListItemId>EPIE5559HKT391</ListItemId> <DateAdded>2003-11-17</DateAdded> <QuantityDesired>1</QuantityDesired> <QuantityReceived>0</QuantityReceived> <Item> <ASIN>5557205521</ASIN> <ItemAttributes> <Title>Horton hears a who</Title> </ItemAttributes> </Item> </ListItem> ... The rest of the XML is just either more list items like that, or information about the request at the top of the response.

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  • Maven WTP webapp with maven-eclipse-plugin but without m2eclipse

    - by chrsk
    I use the eclipse:eclipse goal to generate an Eclipse Project environment. The deployment works fine. The goal creates the var classpath entries for all needed dependencies. With m2eclipse there was the Maven Container which defines an export folder which was WEB-INF/lib for me. But i don't want to rely on m2eclipse so i don't want to use it anymore. the class path entries which are generated by eclipse:eclipse goal don't have such a export folder. While booting the servlet container with WTP it publishes all resources and classes except the libraries to the context. Whats missing to publish the needed libs, or isn't that possible without m2eclipse integration? IDE Configuration Eclipse 3.5 JEE Galileo Maven 2 m2eclipse The maven-eclipse-plugin configuration <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-eclipse-plugin</artifactId> <version>2.8</version> <configuration> <projectNameTemplate>opensaga-[artifactId]</projectNameTemplate> <useProjectReferences>false</useProjectReferences> <downloadSources>false</downloadSources> <downloadJavadocs>false</downloadJavadocs> <wtpmanifest>true</wtpmanifest> <wtpversion>2.0</wtpversion> <wtpapplicationxml>true</wtpapplicationxml> <wtpContextName>opensaga-[artifactId]</wtpContextName> <additionalProjectFacets> <jst.java>5.0</jst.java> <jst.web>2.3</jst.web> </additionalProjectFacets> </configuration> </plugin>

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  • Sphinx PHP Geodist problems

    - by James
    Below is my PHP function to call nearby points using Sphinx for MySQL. There are hundreds of thousands of nearby points which to what I can tell, are being indexed by Sphinx, but simply fails silently when searching with Sphinx. Other Sphinx queries I run against other indexes work completely fine. function nearby($latitude, $longitude, $radius) { global $sphinx; $sphinx->SetMatchMode(SPH_MATCH_ALL); $sphinx->SetArrayResult(true); $sphinx->SetLimits(0, 1000); $sphinx->SetGeoAnchor('latitude', 'longitude', (float) deg2rad($latitude), (float) deg2rad($longitude)); $circle = (float) $radius * 1.609344; $sphinx->SetFilterFloatRange('@geodist', 0.0, $circle); $matches = $sphinx->Query('', 'geo'); return $matches; } $nearby = nearby($latitude, $longitude, 10000); var_dump($nearby); This, when called with valid latitude and longitude co-ords and a very large radius for debugging produces: bool(false) Below is my sphinx.conf covering the geo part: source geo { type = mysql sql_host = 127.0.0.1 sql_user = user sql_pass = pass sql_db = db sql_port = 3306 sql_query_pre = set names utf8 sql_query_pre = set session query_cache_type=OFF sql_query = SELECT id,city,region,country,radians(longitude) AS longitude, radians(latitude) AS latitude FROM points; sql_attr_float = longitude sql_attr_float = latitude sql_ranged_throttle = 0 sql_query_info = SELECT * FROM points WHERE id = $id } index geo { source = geo path = /var/data/geo docinfo = extern #mlock = 0 #morphology = none min_word_len = 1 charset_type = utf-8 #charset_table = 0..9, A..Z->a..z, _, a..z, U+410..U+42F->U+430..U+44F, U+430..U+44F ignore_chars = U+00AD html_strip = 0 enable_star = 0 } indexer { mem_limit = 1024M } searchd { port = 3312 log = /var/log/searchd.log query_log = /var/log/query.log read_timeout = 5 max_children = 5 pid_file = /var/log/searchd.pid max_matches = 10000 seamless_rotate = 1 preopen_indexes = 0 unlink_old = 1 }

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  • Webservice Connection Refused

    - by sidcom
    I have developed a web app using a webservice. Everything works fine in the development environment. I have moved the webservice to the production server in a test folder behind my main website. I can browse to the published service localy on the production server and i can access the remote service from my development machine. If I run my web app in my development environment I can use the remote webservice no problem. If I move the web application to the production environment the browser outputs this error when the application performs the ajax login method. The following javascript error is output to the browser Error: Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 500 Source File: www.grav80.com/clients/callswharf/Redshift/Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=RadScriptManager1_HiddenField&compress=1&_TSM_CombinedScripts_=%3b%3bSystem.Web.Extensions%2c+Version%3d3.5.0.0%2c+Culture%3dneutral%2c+PublicKeyToken%3d31bf3856ad364e35%3aen-US%3a1247b7d8-6b6c-419f-a45f-8ff264c90734%3aea597d4b%3ab25378d2%3bTelerik.Web.UI%2c+Version%3d2009.2.826.35%2c+Culture%3dneutral%2c+PublicKeyToken%3d121fae78165ba3d4%3aen-US%3ad2d891f5-3533-469c-b9a2-ac7d16eb23ff%3a16e4e7cd%3a86526ba7%3aed16cbdc%3ab7778d6c Line: 15 The Following error appears in the event log Exception information: Exception type: WebException Exception message: Unable to connect to the remote server Request information: Request URL: www.grav80.com/clients/callswharf/redshift/login.aspx Request path: /clients/callswharf/redshift/login.aspx User host address: 77.68.58.231 User: Is authenticated: False Authentication Type: Thread account name: NT AUTHORITY\NETWORK SERVICE You can view the behaviour in the test environment here. http://www.grav80.com/clients/callswharf/redshift/ You can view the service here http://www.grav80.com/clients/callswharf/redshift/service/g80cms.asmx I hope some on can shine some light on this for me.

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  • A catalogue of Cassandra log messages: What is the correct interpretation?

    - by knorv
    The following is a complete catalogue of all log messages generated by Cassandra 0.6 when stress-testing a Cassandra installation over an extended period of time: AntiEntropyService: Sending AEService tree for (,) to: [] CassandraDaemon: Binding thrift service to localhost/N.N.N.N:N CassandraDaemon: Cassandra starting up... ColumnFamilyStore: has reached its threshold; switching in a fresh Memtable at CommitLogContext(file='.../cassandra/commitlog/CommitLog-N.log', position=N) ColumnFamilyStore: Enqueuing flush of Memtable()@N CommitLog: Discarding obsolete commit log:CommitLogSegment(.../cassandra/commitlog/CommitLog-N.log) CommitLog: Log replay complete CommitLog: Replaying .../cassandra/commitlog/CommitLog-N.log, ... CommitLogSegment: Creating new commitlog segment .../cassandra/commitlog/CommitLog-N.log CompactionManager: Compacted to .../cassandra/data//-N-Data.db. N/N bytes for N keys. Time: Nms. CompactionManager: Compacting [org.apache.cassandra.io.SSTableReader(path='.../cassandra/data//-N-Data.db'), ...] DatabaseDescriptor: Auto DiskAccessMode determined to be mmap GCInspector: GC for ConcurrentMarkSweep: N ms, N reclaimed leaving N used; max is N GCInspector: GC for ParNew: N ms, N reclaimed leaving N used; max is N Memtable: Completed flushing .../cassandra/data//-N-Data.db Memtable: Writing Memtable()@N SSTable: Deleted .../cassandra/data//-N-Data.db SSTableDeletingReference: Deleted .../cassandra/data//-N-Data.db SSTableReader: Sampling index for .../cassandra/data//-N-Data.db StorageService: Starting up server gossip SystemTable: Saved ClusterName found: Test Cluster SystemTable: Saved ClusterName not found. Using Test Cluster SystemTable: Saved Token found: N SystemTable: Saved Token not found. Using N For each of the log messages listed - what is the correct interpretation of the log message?

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  • htaccess redirect http to https on a magento site

    - by joesalvator
    I have a magento site and i need to have it redirect to https, i have the cert installed but i am not sure how to mod the htaccess file? here is a copy of the root htaccess file thanks # uncomment these lines for CGI mode make sure to specify the correct cgi php binary file name it might be /cgi-bin/php-cgi Action php5-cgi /cgi-bin/php5-cgi AddHandler php5-cgi .php # GoDaddy specific options Options -MultiViews you might also need to add this line to php.ini cgi.fix_pathinfo = 1 if it still doesn't work, rename php.ini to php5.ini # this line is specific for 1and1 hosting #AddType x-mapp-php5 .php #AddHandler x-mapp-php5 .php # default index file DirectoryIndex index.php # adjust memory limit php_value memory_limit 64M php_value memory_limit 128M php_value max_execution_time 18000 # disable magic quotes for php request vars php_flag magic_quotes_gpc off # disable automatic session start before autoload was initialized php_flag session.auto_start off # enable resulting html compression #php_flag zlib.output_compression on # disable user agent verification to not break multiple image upload php_flag suhosin.session.cryptua off # turn off compatibility with PHP4 when dealing with objects php_flag zend.ze1_compatibility_mode Off # disable POST processing to not break multiple image upload SecFilterEngine Off SecFilterScanPOST Off # # Insert filter on all content ###SetOutputFilter DEFLATE # Insert filter on selected content types only #AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript # Netscape 4.x has some problems... #BrowserMatch ^Mozilla/4 gzip-only-text/html # Netscape 4.06-4.08 have some more problems #BrowserMatch ^Mozilla/4\.0[678] no-gzip # MSIE masquerades as Netscape, but it is fine #BrowserMatch \bMSIE !no-gzip !gzip-only-text/html # Don't compress images #SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary # Make sure proxies don't deliver the wrong content #Header append Vary User-Agent env=!dont-vary # make HTTPS env vars available for CGI mode SSLOptions StdEnvVars # enable rewrites Options +FollowSymLinks RewriteEngine on # you can put here your magento root folder path relative to web root #RewriteBase /magento/ # workaround for HTTP authorization in CGI environment RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}] # always send 404 on missing files in these folders RewriteCond %{REQUEST_URI} !^/(media|skin|js)/ # never rewrite for existing files, directories and links RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !-l # rewrite everything else to index.php RewriteRule .* index.php [L] # Prevent character encoding issues from server overrides If you still have problems, use the second line instead AddDefaultCharset Off #AddDefaultCharset UTF-8 # s ExpiresDefault "access plus 1 year" # By default allow all access Order allow,deny Allow from all

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  • How do I achieve a 'select or insert' task using LINQ to EF?

    - by ProfK
    I have an import process with regions, locations, and shifts, where a Shift object has a Location property, and a Location object has a Region property. If a region name does not exist, I create the region, and like wise a location. I thought I could neatly encapsulate the 'Select if exists, or create' logic into helper classes for Region and Location, but if I use local data contexts in these classes I run into attach and detach overheads that become unpleasent. If I include a data context dependency in these classes, my encapsulation feels broken. What is the ideal method for achieving this, or where is the ideal place to place this functionality? In my example I have leaned heavily on the foreign key crutch provided with .NET 4.0, and simply avoided using entities in favour of direct foreign key values, but this is starting to smell. Example: public partial class ActivationLocation { public static int GetOrCreate(int regionId, string name) { using (var ents = new PvmmsEntities()) { var loc = ents.ActivationLocations.FirstOrDefault(x => x.RegionId == regionId && x.Name == name); if (loc == null) { loc = new ActivationLocation {RegionId = regionId, Name = name}; ents.AddToActivationLocations(loc); ents.SaveChanges(SaveOptions.AcceptAllChangesAfterSave); } return loc.LocationId; } } }

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  • Adding new record to a VFP data table in VB.NET with ADO recordsets

    - by Gerry
    I am trying to add a new record to a Visual FoxPro data table using an ADO dataset with no luck. The code runs fine with no exceptions but when I check the dbf after the fact there is no new record. The mDataPath variable shown in the code snippet is the path to the .dbc file for the entire database. A note about the For loop at the bottom; I am adding the body of incoming emails to this MEMO field so thought I needed to break the addition of this string into 256 character Chunks. Any guidance would be greatly appreciated. cnn1.Open("Driver={Microsoft Visual FoxPro Driver};" & _ "SourceType=DBC;" & _ "SourceDB=" & mDataPath & ";Exclusive=No") Dim RS As ADODB.RecordsetS = New ADODB.Recordset RS.Open("select * from gennote", cnn1, 1, 3, 1) RS.AddNew() 'Assign values to the first three fields RS.Fields("ignnoteid").Value = NextIDI RS.Fields("cnotetitle").Value = "'" & mail.Subject & "'" RS.Fields("cfilename").Value = "''" 'Looping through 254 characters at a time and add the data 'to Ado Field buffer For i As Integer = 1 To Len(memo) Step liChunkSize liStartAt = i liWorkString = Mid(mail.Body, liStartAt, liChunkSize) RS.Fields("mnote").AppendChunk(liWorkString) Next 'Update the recordset RS.Update() RS.Requery() RS.Close()

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  • Is there a perfect algorithm for chess?

    - by Overflown
    Dear Stack Overflow community, I was recently in a discussion with a non-coder person on the possibilities of chess computers. I'm not well versed in theory, but think I know enough. I argued that there could not exist a deterministic Turing machine that always won or stalemated at chess. I think that, even if you search the entire space of all combinations of player1/2 moves, the single move that the computer decides upon at each step is based on a heuristic. Being based on a heuristic, it does not necessarily beat ALL of the moves that the opponent could do. My friend thought, to the contrary, that a computer would always win or tie if it never made a "mistake" move (however do you define that?). However, being a programmer who has taken CS, I know that even your good choices - given a wise opponent - can force you to make "mistake" moves in the end. Even if you know everything, your next move is greedy in matching a heuristic. Most chess computers try to match a possible end game to the game in progress, which is essentially a dynamic programming traceback. Again, the endgame in question is avoidable though. -- thanks, Allan Edit: Hmm... looks like I ruffled some feathers here. That's good. Thinking about it again, it seems like there is no theoretical problem with solving a finite game like chess. I would argue that chess is a bit more complicated than checkers in that a win is not necessarily by numerical exhaustion of pieces, but by a mate. My original assertion is probably wrong, but then again I think I've pointed out something that is not yet satisfactorily proven (formally). I guess my thought experiment was that whenever a branch in the tree is taken, then the algorithm (or memorized paths) must find a path to a mate (without getting mated) for any possible branch on the opponent moves. After the discussion, I will buy that given more memory than we can possibly dream of, all these paths could be found.

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  • Feature element repeatedly added with every feature activation/deactivation

    - by ccomet
    This is a very minor behavior when compared with the entire scope, but it is one that I'd like to put a stop to. I have created a very, very simple SharePoint Feature. It has two elements in its manifest: an aspx webpart page, and an elements xml. I'll paraphrase my elements xml, which just adds a module, below. <Elements xmlns="http://schemas.microsoft.com/sharepoint/"> <Module Name="Pass" Url="" Path=""> <File Url="pasq.aspx" NavBarHome="True" Type="Ghostable"> <AllUsersWebPart WebPartZoneID="Left" WebPartOrder="0"> <![CDATA[ WARGH THIS PART DOESN'T MATTER FOR THIS QUESTION! ]]> </AllUsersWebPart> </File> </Module> </Elements> Now, on the first time I deploy and activate this feature, it works properly. But if I have to deactivate and then reactivate the feature in order to fix some properties in the webpart, then I find myself with a second webpart on the page. Naturally, each similar cycle will just add more and more. I understand that a new webpart must be created in order to employ the changes I just made, but why is the old webpart still on the page? Can I make this older webpart go away automatically as part of the feature activation/deactivation process without needing to employ a Receiver class?

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  • SQLite table does not exist exception for existing SQLite database (and table)

    - by SK9
    I've followed the instructions given here for introducing an existing SQLite database to your Android app. When I query the table "android_metadata" this is fine. But when I run a similar query on my own table "words" (which has _id for primary integer key) I get a table does not exist exception and the app crashes. Why is that? Code: Cursor c = myDatabase.query("android_metadata", null, null, null, null, null, null, null); works but Cursor c = myDatabase.query("words", null, null, null, null, null, null, null); returns a table does not exist exception. This is how I'm creating the database (the references to paths and filenames are correct): private void copyDatabase() throws IOException{ //Open local db as the input stream InputStream myInput = mContext.getAssets().open(DB_NAME); //Path to the just created empty db String outFileName = DB_PATH + DB_NAME; //Open the empty db as the output stream OutputStream myOutput = new FileOutputStream(outFileName); //Transfer bytes from the inputfile to the outputfile byte[] buffer = new byte[1024]; int length; while ((length = myInput.read(buffer))>0){ myOutput.write(buffer, 0, length); } //Close the streams myOutput.flush(); myOutput.close(); myInput.close(); } (Note: To my eyes, the table is there. I'm looking right at it in my SQLite browser.)

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  • comparison between string literal

    - by wiso
    This very simple code: #include <iostream> using namespace std; void exec(char* option) { cout << "option is " << option << endl; if (option == "foo") cout << "option foo"; else if (option == "bar") cout << "opzion bar"; else cout << "???"; cout << endl; } int main() { char opt[] = "foo"; exec(opt); return 0; } generate two warning: comparison with string literal results in unspecified behaviour. Can you explain why exactly this code doesn't work, but if I change char opt[] to char *opt it works, but generates the warning? Is it related to the \0 termination? What is the difference between the two declaration of opt? What if I use const qualifier? The solution is to use std::string?

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  • Finding and Printing all Links within a DIV

    - by Abs
    Hello all, I am trying to find all links in a div and then printing those links. I am using the Simple HTML Dom to parse the HTML file. Here is what I have so far, please read the inline comments and let me know where I am going wrong. include('simple_html_dom.php'); $html = file_get_html('tester.html'); $articles = array(); //find the div the div with the id abcde foreach($html->find('#abcde') as $article) { //find all a tags that have a href in the div abcde foreach($article->find('a[href]') as $link){ //if the href contains singer then echo this link if(strstr($link, 'singer')){ echo $link; } } } What currently happens is that the above takes a long time to load (never got it to finish). I printed what it was doing in each loop since it was too long to wait and I find that its going through things I don't need it to! This suggests my code is wrong. The HTML is basically something like this: <div id="abcde"> <!-- lots of html elements --> <!-- lots of a tags --> <a href="singer/tom" /> <img src="image..jpg" /> </a> </div> Thanks all for any help

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  • What's slowing for loops/assignment vs. C?

    - by Lee
    I have a collection of PHP scripts that are extremely CPU intensive, juggling millions of calculations across hundreds of simultaneous users. I'm trying to find a way to speed up the internals of PHP variable assignment, and looping sequences vs C. Although PHP is obviously loosely typed, is there any way/extension to specifically assign type (assign, not cast, which seems even more expensive) in a C-style fashion? Here's what I mean. This is some dummy code in C: #include <stdio.h> int main() { unsigned long add=0; for(unsigned long x=0;x<100000000;x++) { add = x*59328409238; } printf("x is %ld\n",add); } Pretty self-explanatory -- it loops 100 million times, multiples each iteration by an arbitrary number of some 59 billion, assigns it to a variable and prints it out. On my Macbook, compiling it and running it produced: lees-macbook-pro:Desktop lee$ time ./test2 x is 5932840864471590762 real 0m0.266s user 0m0.253s sys 0m0.002s Pretty darn fast! A similar script in PHP 5.3 CLI... <?php for($i=0;$i<100000000;$i++){ $a=$i*59328409238; } echo $a."\n"; ?> ... produced: lees-macbook-pro:Desktop lee$ time /Applications/XAMPP/xamppfiles/bin/php test3.php 5.93284086447E+18 real 0m22.837s user 0m22.110s sys 0m0.078s Over 22 seconds vs 0.2! I realize PHP is doing a heck of a lot more behind the scenes than this simple C program - but is there any way to make the PHP internals to behave more 'natively' on primitive types and loops?

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  • Uploadify plugin doesn't call Java Servlet

    - by sergionni
    Hello,i just started using Uploadify flash plugin instead of standard HTML UI. And met the next problem: when I click "Upload Files" link,that progress is shown and "completed" status is appeared, but in reality - it didn't happened anything,Java Servlet isn't called from backend. There is upload servlet and uploading performed next way earlier: < form enctype="multipart/form-data" method="post" target="uploadFrame" action="<%= request.getContextPath() %>/uploadFile?portletId=${portletId}&remoteFolder=${remoteFolder}">... After providing Uploadify plugin, UI now looks like: plugin part(configuration): <script> ... oScript.text+= "$j('#uploadify').uploadify({"; oScript.text+= "'uploader' : 'kne-portlets/js/lib/uploadify/scripts/uploadify.swf',"; oScript.text+= "'script' : '<%= request.getContextPath() %>/uploadFile?portletId=${portletId}&remoteFolder=<%= decodedString %>',"; oScript.text+= "'cancelImg': 'kne-portlets/js/lib/uploadify/cancel.png',"; oScript.text+= "'folder' : '<%= decodedString %>',"; oScript.text+= "'queueID' : 'fileQueue',"; oScript.text+= "'auto' : false,"; oScript.text+= "'multi' : false,"; //oScript.text+= "'sizeLimit' : 1000"; oScript.text+= "});"; oScript.text+= "});"; ... </script> 'scripts' parameter here points to Java Servlet on backend <%= decodedString %> is folder path, which value is \\file-srv\demo part for uploading: <input type="file" name="uploadify" id="uploadify" /> <a href="javascript:$j('#uploadify').uploadifyUpload();">Upload Files</a> Where is my fault? 'Script' param in plugin config points to Java Servlet on backend and it's done,but Servlet isn't triggered. error, when 'script' param isn't correct:http://img190.imageshack.us/i/errormm.png/ Thank you for assistance.

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  • Using a custom MvcHttpHandler v2.0 Breaking change from 1.0 to 2.0 ?

    - by Myster
    Hi I have a site where part is webforms (Umbraco CMS) and part is MVC This is the HttpHandler to deal with the MVC functionality: public class Mvc : MvcHttpHandler { protected override void ProcessRequest(HttpContext httpContext) { httpContext.Trace.Write("Mvc.ashx", "Begin ProcessRequest"); string originalPath = httpContext.Request.Path; string newPath = httpContext.Request.QueryString["mvcRoute"]; if (string.IsNullOrEmpty(newPath)) newPath = "/"; httpContext.Trace.Write("Mvc.ashx", "newPath = "+newPath ); HttpContext.Current.RewritePath(newPath, false); base.ProcessRequest(HttpContext.Current); HttpContext.Current.RewritePath(originalPath, false); } } Full details of how this is implemented here This method works well in an MVC 1.0 website. However when I upgrade this site to MVC 2.0 following the steps in Microsoft's upgrade documentation; everything compiles, except at runtime I get this exception: Server Error in '/' Application. The resource cannot be found. Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly. Requested URL: /mvc.ashx Version Information: Microsoft .NET Framework Version:2.0.50727.4927; ASP.NET Version:2.0.50727.4927 This resource and it's dependencies are found fine in MVC 1.0 but not in MVC 2.0, is there an extra dependency I'd need to add? Is there something I'm missing? Is there a change in the way MVC 2.0 works?

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  • Using named_scopes on the join model of a has_many :through

    - by uberllama
    Hi folks. I've been beating my head against the wall on something that on the surface should be very simple. Lets say I have the following simplified models: user.rb has_many :memberships has_many :groups, :through => :memberships membership.rb belongs_to :group belongs_to :user STATUS_CODES = {:admin => 1, :member => 2, :invited => 3} named_scope :active, :conditions => {:status => [[STATUS_CODES[:admin], STATUS_CODES[:member]]} group.rb has_many :memberships has_many :users, :through => :memberships Simple, right? So what I want to do is get a collection of all the groups a user is active in, using the existing named scope on the join model. Something along the lines of User.find(1).groups.active. Obviously this doesn't work. But as it stands, I need to do something like User.find(1).membrships.active.all(:include => :group) which returns a collection of memberships plus groups. I don't want that. I know I can add another has_many on the User model with conditions that duplicate the :active named_scope on the Membership model, but that's gross. has_many :active_groups, :through => :memberships, :source => :group, :conditions => ... So my question: is there a way of using intermediary named scopes when traversing directly between models? Many thanks.

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  • No flow definition found. Spring web flow

    - by user184794
    Hi, I am new to Spring webflow and now I am trying the example in Spring recipes book and I know this is a basic question. I am getting the error as follows, org.springframework.webflow.definition.registry.NoSuchFlowDefinitionException: No flow definition '${flowExecutionUrl}&_eventId=next' found at org.springframework.webflow.definition.registry.FlowDefinitionRegistryImpl.getFlowDefinitionHolder(FlowDefinitionRegistryImpl.java:126) at org.springframework.webflow.definition.registry.FlowDefinitionRegistryImpl.getFlowDefinition(FlowDefinitionRegistryImpl.java:61) at org.springframework.webflow.executor.FlowExecutorImpl.launchExecution(FlowExecutorImpl.java:138) at org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:193).... Shown below is my configurations, <bean name="flowController" class="org.springframework.webflow.mvc.servlet.FlowController"> <property name="flowExecutor" ref="flowExecutor"></property> </bean> <webflow:flow-executor id="flowExecutor" /> <webflow:flow-registry id="flowRegistry" > <webflow:flow-location path="/WEB-INF/flows/welcome/welcome.xml"></webflow:flow-location> </webflow:flow-registry> /WEB-INF/flows/welcome/welcome.xml, <view-state id="welcome"> <transition on="next" to="introduction" /> <transition on="skip" to="menu" /> </view-state> <view-state id="introduction"> <on-render> <evaluate expression="libraryService.getHolidays()" result="requestScope.holidays" /> </on-render> <transition on="next" to="menu" /> </view-state> <view-state id="menu"></view-state> In welcome.jsp, <a href="${flowExecutionUrl}&_eventId=next">Next</a> <a href="${flowExecutionUrl}&_eventId=skip">Skip</a> Please let me know what is going wrong. I am using 2.0.9 Release. Thanks in advance, SD

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