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  • Lucene setboost doesn't work

    - by Keven
    Hi all, OUr team just upgrade lucene from 2.3 to 3.0 and we are confused about the setboost and getboost of document. What we want is just set a boost for each document when add them into index, then when search it the documents in the response should have different order according to the boost I set. But it seems the order is not changed at all, even the boost of each document in the search response is still 1.0. Could some one give me some hit? Following is our code: String[] a = new String[] { "schindler", "spielberg", "shawshank", "solace", "sorcerer", "stone", "soap", "salesman", "save" }; List strings = Arrays.asList(a); AutoCompleteIndex index = new Index(); IndexWriter writer = new IndexWriter(index.getDirectory(), AnalyzerFactory.createAnalyzer("en_US"), true, MaxFieldLength.LIMITED); float i = 1f; for (String string : strings) { Document doc = new Document(); Field f = new Field(AutoCompleteIndexFactory.QUERYTEXTFIELD, string, Field.Store.YES, Field.Index.NOT_ANALYZED); doc.setBoost(i); doc.add(f); writer.addDocument(doc); i += 2f; } writer.close(); IndexReader reader2 = IndexReader.open(index.getDirectory()); for (int j = 0; j < reader2.maxDoc(); j++) { if (reader2.isDeleted(j)) { continue; } Document doc = reader2.document(j); Field f = doc.getField(AutoCompleteIndexFactory.QUERYTEXTFIELD); System.out.println(f.stringValue() + ":" + f.getBoost() + ", docBoost:" + doc.getBoost()); doc.setBoost(j); }

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  • How to pin NetBeans to Windows 7 taskbar?

    - by Vilx-
    I've googled around and it seems that I'm not the only one with the problem, however I couldn't find the solution. Maybe someone around here has figured it out. The problem is that netbeans.exe is actually a stub which is calling javaw.exe. When I try to pin the NetBeans process to the taskbar I actually pin "Java(TM) Platform SE Binary". That changes the icon and the pin doesn't work. The funny thing is that it works on another machine. I don't know whether it's because it's a different version of NetBeans, or a different version of Java. Has anyone figured this out? Added: I know this is sort of not programming related; on the other hand there are plenty of topics around here about how to better your programming environment, and this one is no worse than those. Oh, and btw - Windows 7 Enterprise x64; Java JDK 1.6.17; Netbeans 6.8

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  • A dynamic array of a class, inside another separate class?

    - by pinnacler
    I'm working on a robot localization simulator and I created a class called "landmark". The end result is going to be a robot that is always centered and always faces the top of the screen. As it turns, the birds eye view map will rotate around the robot. To accomplish this, I'm assuming I can rotate one class and have all elements inside rotate as well. So, the landmark class has properties x,y, label, and radius. This is suppose to simulate a tree location in a forest. To test everything, I need "forest data," and I wrote a script to generate 100 trees in a 100m x 100m area. The script automatically generates values within an acceptable range for x,y, radius. The generated data is stored in an object called tempForest and is 100x3. Ideally, I want to create a class called "landmarks" (plural) that has 100 landmark instances inside. How would I instantiate 100 instances of landmark in one instance of landmarks using that randomly generated data? Ideally, I'd just type treeBeacons = landmarks(); and it would randomly populate 100 (user definable, set in config file) instances with x, y, radius data. I'm not sure how to deal with a dynamic array of class "Landmark", inside another single class "landmarks." Any ideas?

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  • Terminate function on System.in .. possible?

    - by Ronald
    I am currently working on a project where I have to make an agent to interact with a server. Each 50ms, the server will receive the last thing I outputted to System.out and send me a new set of lines as a 'state' through the System.in printstream to analyze and send my next message to System.out. Also, if the server receives multiple outputs from me, it only regards the most recent one. .. As for my question: My program originally constructed a tree and then analyzed each leaf node to see which would be optimal, and then waited around for the next input, but I can recursively do a deeper tree search that would make my output 'better' (and again and again to keep returning a better result). Using this and the fact that if the server receives multiple outputs, it only takes the most recent one, I could do each level, print my result and start the next level. But here comes my problem... I can't be stuck in some complex algorithm while I am supposed to receiving the next input as I will then miss it. So I was wondering if there is a way to cancel anything else I am doing when I receive something via System.in and then go back to the beginning of the function and start the search again with the new set of input (and rinse and repeat..) I hope this all makes sense, Thank ye all

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  • JMeter CSV Data Set is corrupting Japanese strings stored as proper UTF-8, I get Question Marks instead

    - by Mark Bennett
    I read in search terms from a simple text file to send to a search engine. It works fine in English, but gives me ???? for any Japanese text. Text with mixed English and Japanese does show the English text, so I know it's reading it. What I'm seeing: Input text: Snow Leopard ??????????????? Turns into: Snow Leopard ??????????????? This is in my POST field of an HTTP. If I set JMeter to encode the data, it just puts in the percent sequence for question marks. Interesting note: In the example above there are 15 Japanese characters, and then 15 question marks, so at some point it's being seen as full characters and not just bytes. About the Data: The CSV file is very simple in structure. There's only one field / one column, which I name TERM, and later use as ${TERM} I don't really need full CSV because it's only one string per line. There's no commas or quotes. When I run the Unix "file" command on the file, it says UTF-8 text. I've also verified it in command line and graphical mode on two machines. JMeter CSV Dataset Config: Filename: japanese-searches.csv File encoding: UTF-8 (also tried without) Variable names: TERM Delimiter: , Allow Quoted Data: False (I also tried True, different, but still wrong) Recycle at EOF: True Stop at EOF: False Staring mode: All threads A few things I've tried: Tried Allow quoted Data. It changed to other strange characters. -Dfile.encoding=UTF-8 Tried encoding the POST, but it just turned into a bunch of %nn for question marks And I'm not sure how "debug" just after the each line of the CSV is read in. I think it's corrupted right away, but I'm not sure. If it's only mangled when I reference it, then instead of ${TERM} perhaps there's some other "to bytes" function call. I'll start checking into that. I haven't done anything with the JMeter functions yet.

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  • With NHibernate, how can I add a child object when updating a parent object?

    - by BMZ
    I have a simple Parent/Child relationship between a Person object and an Address object. The Person object exists in the DB. After doing a Get on the Person, I add a new Address object to the Address sub-object list of the parent, and do some other updates to the Person object. Finally, I do an Update on the Person object. With a SQL trace window, I can see the update to the Person object to the Person table and the Insert of the Address record to the Address table. The issue is that, after the update is performed, the AddressId (primary key on the Address object) is still set to 0, which is what it defaults to when you first initialize the Address object. I have verified that when I do an Add, this value is set correctly. Is this a known issue when trying to add sub-objects as part of an NHibernate UPDATE? Sample code and mapping files are below Thanks <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"> <class name="BusinessEntities.Wellness.Person,BusinessEntities.Wellness" table="Person" lazy="true" dynamic-insert="true" dynamic-update="false"> <id name="Personid" column="PersonID" type="int"> <generator class="native" /> </id> <version type="binary" generated="always" name="RecordVersion" column="`RecordVersion`"/> <property type="int" not-null="true" name="Customerid" column="`CustomerID`" /> <property type="AnsiString" not-null="true" length="9" name="Ssn" column="`SSN`" /> <property type="AnsiString" not-null="true" length="30" name="FirstName" column="`FirstName`" /> <property type="AnsiString" not-null="true" length="35" name="LastName" column="`LastName`" /> <property type="AnsiString" length="1" name="MiddleInitial" column="`MiddleInitial`" /> <property type="DateTime" name="DateOfBirth" column="`DateOfBirth`" /> <bag name="PersonAddresses" inverse="true" lazy="true" cascade="all"> <key column="PersonID" /> <one-to-many class="BusinessEntities.Wellness.PersonAddress,BusinessEntities.Wellness" / </bag> </class> </hibernate-mapping> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"> <class name="BusinessEntities.Wellness.PersonAddress,BusinessEntities.Wellness" table="PersonAddress" lazy="true" dynamic-insert="true" dynamic-update="false"> <id name="PersonAddressId" column="PersonAddressID" type="int"> <generator class="native" /> </id> <version type="binary" generated="always" name="RecordVersion" column="`RecordVersion`" /> <property type="AnsiString" not-null="true" length="1" name="AddressTypeid" column="`AddressTypeID`" /> <property type="AnsiString" not-null="true" length="60" name="AddressLine1" column="`AddressLine1`" /> <property type="AnsiString" length="60" name="AddressLine2" column="`AddressLine2`" /> <property type="AnsiString" length="60" name="City" column="`City`" /> <property type="AnsiString" length="2" name="UsStateId" column="`USStateID`" /> <property type="AnsiString" length="5" name="UsPostalCodeId" column="`USPostalCodeID`" /> <many-to-one name="Person" cascade="none" column="PersonID" /> </class> </hibernate-mapping> Person newPerson = new Person(); newPerson.PersonName = "John Doe"; newPerson.SSN = "111111111"; newPerson.CreatedBy = "RJC"; newPerson.CreatedDate = DateTime.Today; personDao.AddPerson(newPerson); Person updatePerson = personDao.GetPerson(newPerson.PersonId); updatePerson.PersonAddresses = new List<PersonAddress>(); PersonAddress addr = new PersonAddress(); addr.AddressLine1 = "1 Main St"; addr.City = "Boston"; addr.State = "MA"; addr.Zip = "12345"; updatePerson.PersonAddresses.Add(addr); personDao.UpdatePerson(updatePerson); int addressID = updatePerson.PersonAddresses[0].AddressId;

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  • I need a few minutes of dedicated server a week, but not for hosting, just to convert ogg etc

    - by talkingnews
    I'm completely happy with my webhosting, it's just that I need to do one little thing they won't allow, and that's run an instance of Sox to convert about 30 mp3s to ogg files, in various directories, a couple of times a week, to be done automatically in response to the detection of the upload of an mp3. Probably looking at a minute of server time over the whole week. I've had unhelpful suggestions on other forums like "why not leave your home PC on 24 hours a day and then use all your isp bandwidth to do this", which doesn't work for me. I know that I can host files on, say, Amazon S3, but is there something similar for my needs? All it would need to do would be: wget/ftp the mp3 files, convert them to ogg, ftp the files back to my hosting. Of course, all this wouldn't be needed if there was such a thing as a compiled binary of Sox (or any mp3ogg converter) for Centos which I could upload without needing root access, but I've given up asking that one, but always open to suggestions!

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  • Are there supposed to be more restrictions on operator->* overloads?

    - by Potatoswatter
    I was perusing section 13.5 after refuting the notion that built-in operators do not participate in overload resolution, and noticed that there is no section on operator->*. It is just a generic binary operator. Its brethren, operator->, operator*, and operator[], are all required to be non-static member functions. This precludes definition of a free function overload to an operator commonly used to obtain a reference from an object. But the uncommon operator->* is left out. In particular, operator[] has many similarities. It is binary (they missed a golden opportunity to make it n-ary), and it accepts some kind of container on the left and some kind of locator on the right. Its special-rules section, 13.5.5, doesn't seem to have any actual effect except to outlaw free functions. (And that restriction even precludes support for commutativity!) So, for example, this is perfectly legal (in C++0x, remove obvious stuff to translate to C++03): #include <utility> #include <iostream> #include <type_traits> using namespace std; template< class F, class S > typename common_type< F,S >::type operator->*( pair<F,S> const &l, bool r ) { return r? l.second : l.first; } template< class T > T & operator->*( pair<T,T> &l, bool r ) { return r? l.second : l.first; } template< class T > T & operator->*( bool l, pair<T,T> &r ) { return l? r.second : r.first; } int main() { auto x = make_pair( 1, 2.3 ); cerr << x->*false << " " << x->*4 << endl; auto y = make_pair( 5, 6 ); y->*(0) = 7; y->*0->*y = 8; // evaluates to 7->*y = y.second cerr << y.first << " " << y.second << endl; } I can certainly imagine myself giving into temp[la]tation. For example, scaled indexes for vector: v->*matrix_width[5] = x; Did the standards committee forget to prevent this, was it considered too ugly to bother, or are there real-world use cases?

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  • How can a wix custom action dll call be made to use the debug runtime via a merge module?

    - by Benj
    I'm trying to create a debug build with a corresponding debug installer for our product. I'm new to Wix so please forgive any naivety contained herein. The debug Dlls in my project are dependent on both the VS2008 and the VS2008SP1 debug runtimes. I've created a merge module feature in wix to bundle those runtimes with my installer. <Include xmlns="http://schemas.microsoft.com/wix/2006/wi"> <!-- Include our 'variables' file --> <!--<?include variables.wxi ?>--> <!--<Fragment>--> <DirectoryRef Id="TARGETDIR"> <!-- Always install the 32 bit ATL/CRT libraries, but only install the 64 bit ones on a 64 bit build --> <Merge Id="AtlFiles_x86" SourceFile="$(env.CommonProgramFiles)\Merge Modules\Microsoft_VC90_ATL_x86.msm" DiskId="1" Language="1033"/> <Merge Id="AtlPolicy_x86" SourceFile="$(env.CommonProgramFiles)\Merge Modules\policy_9_0_Microsoft_VC90_ATL_x86.msm" DiskId="1" Language="1033"/> <Merge Id="CrtFiles_x86" SourceFile="$(env.CommonProgramFiles)\Merge Modules\Microsoft_VC90_DebugCRT_x86.msm" DiskId="1" Language="1033"/> <Merge Id="CrtPolicy_x86" SourceFile="$(env.CommonProgramFiles)\Merge Modules\policy_9_0_Microsoft_VC90_DebugCRT_x86.msm" DiskId="1" Language="1033"/> <Merge Id="MfcFiles_x86" SourceFile="$(env.CommonProgramFiles)\Merge Modules\Microsoft_VC90_DebugMFC_x86.msm" DiskId="1" Language="1033"/> <Merge Id="MfcPolicy_x86" SourceFile="$(env.CommonProgramFiles)\Merge Modules\policy_9_0_Microsoft_VC90_DebugMFC_x86.msm" DiskId="1" Language="1033"/> <!-- If this is a 64 bit build, install the relevant modules --> <?if $(env.Platform) = "x64" ?> <Merge Id="AtlFiles_x64" SourceFile="$(env.CommonProgramFiles)\Merge Modules\Microsoft_VC90_ATL_x86_x64.msm" DiskId="1" Language="1033"/> <Merge Id="AtlPolicy_x64" SourceFile="$(env.CommonProgramFiles)\Merge Modules\policy_9_0_Microsoft_VC90_ATL_x86_x64.msm" DiskId="1" Language="1033"/> <Merge Id="CrtFiles_x64" SourceFile="$(env.CommonProgramFiles)\Merge Modules\Microsoft_VC90_DebugCRT_x86_x64.msm" DiskId="1" Language="1033"/> <Merge Id="CrtPolicy_x64" SourceFile="$(env.CommonProgramFiles)\Merge Modules\policy_9_0_Microsoft_VC90_DebugCRT_x86_x64.msm" DiskId="1" Language="1033"/> <Merge Id="MfcFiles_x64" SourceFile="$(env.CommonProgramFiles)\Merge Modules\Microsoft_VC90_DebugMFC_x86_x64.msm" DiskId="1" Language="1033"/> <Merge Id="MfcPolicy_x64" SourceFile="$(env.CommonProgramFiles)\Merge Modules\policy_9_0_Microsoft_VC90_DebugMFC_x86_x64.msm" DiskId="1" Language="1033"/> <?endif?> </DirectoryRef> <Feature Id="MS2008_SP1_DbgRuntime" Title="VC2008 Debug Runtimes" AllowAdvertise="no" Display="hidden" Level="1"> <!-- 32 bit libraries --> <MergeRef Id="AtlFiles_x86"/> <MergeRef Id="AtlPolicy_x86"/> <MergeRef Id="CrtFiles_x86"/> <MergeRef Id="CrtPolicy_x86"/> <MergeRef Id="MfcFiles_x86"/> <MergeRef Id="MfcPolicy_x86"/> <!-- 64 bit libraries --> <?if $(env.Platform) = "x64" ?> <MergeRef Id="AtlFiles_x64"/> <MergeRef Id="AtlPolicy_x64"/> <MergeRef Id="CrtFiles_x64"/> <MergeRef Id="CrtPolicy_x64"/> <MergeRef Id="MfcFiles_x64"/> <MergeRef Id="MfcPolicy_x64"/> <?endif?> </Feature> <!--</Fragment>--> </Include> If I'm doing a debug build of the installer, I include that feature like so: <!-- The 'Feature' that contains the debug CRT/ATL libraries --> <?if $(var.Configuration) = "Debug"?> <?include ..\includes\MS2008_SP1_DbgRuntime.wxi?> <?endif?> The only problem is that my installer also includes a custom action which is also dependent on the debug runtime: <!-- Private key installer --> <Binary Id="InstallPrivateKey" SourceFile="..\InstallPrivateKey\win32\$(var.Configuration)\InstallPrivateKey.dll"></Binary> <CustomAction Id='InstallKey' BinaryKey='InstallPrivateKey' DllEntry='InstallPrivateKey'/> So how can I package the debug run time in such a way that the custom action also has access to it?

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  • Are there ways to write php/python code to run as hooks in the Apache Request Processing pipeline?

    - by SB
    Does anybody know of any modules that provide the functionality to write python or PHP code to run as hooks in the Apache request processing pipeline? For instance, mod_perl lets me write PerlModules, which can contain handlers for the header parsing phase, content delivery, and even filters. I would like to do something similar in other scripting languages. I could write it in C, but the goal is to deploy a module that would work across a number of systems. If I deliver it as binary in C, then it would require 64/32-bit versions and some other issues. With perl, I can just require certain modules installed and mod_perl2.

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  • Eclipse: Organising Files

    - by someguy
    I want to import a project that I'm planning to build upon. The problem is that it is very messy; with source files, class files and libraries under one directory. How would I organise these files using Eclipse? I know you can change the source folder and output folder, but when I do change the source folder, the files that I want inside it do not physically move to that folder. Output folder is fine, though. Also, I would like a separate folder for libraries. I'm not sure how I would go about this, however. Here's how I would like it: src: This folder will contain source files. bin: This folder will contain binary (class) files. lib: This folder will contain external libraries.

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  • Matlab matrix translation and rotation multiple times

    - by pinnacler
    I have a map of individual trees from a forest stored as x,y points in a matrix. I call it fixedPositions. It's cartesian and (0,0) is the origin. I would like 0/360 degrees to be the top of the screen and 90 degrees to be to the right. Given a velocity and a heading, i.e. .5 m/s and 60 degrees (2 o'clock equivalent on a watch), how do I rotate that x,y points, so that the new origin is centered at (.5cos(60),.5sin(60)) and 60 degrees is now at the top of the screen? Then if I were to give you another heading and speed, i.e. 0 degrees and 2m/s, it should calculate it from the last point, not the original fixedPositions origin. I've wasted my day trying to figure this out. I wish I took matrix algebra but I'm at a loss. I tried doing cos(30) and even those wouldn't compute correctly, which after an hour I realize were in radians.

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  • Can this extension method be improved?

    - by Newbie
    I have the following extension method public static class ListExtensions { public static IEnumerable<T> Search<T>(this ICollection<T> collection, string stringToSearch) { foreach (T t in collection) { Type k = t.GetType(); PropertyInfo pi = k.GetProperty("Name"); if (pi.GetValue(t, null).Equals(stringToSearch)) { yield return t; } } } } What it does is by using reflection, it finds the name property and then filteres the record from the collection based on the matching string. This method is being called as List<FactorClass> listFC = new List<FactorClass>(); listFC.Add(new FactorClass { Name = "BKP", FactorValue="Book to price",IsGlobal =false }); listFC.Add(new FactorClass { Name = "YLD", FactorValue = "Dividend yield", IsGlobal = false }); listFC.Add(new FactorClass { Name = "EPM", FactorValue = "emp", IsGlobal = false }); listFC.Add(new FactorClass { Name = "SE", FactorValue = "something else", IsGlobal = false }); List<FactorClass> listFC1 = listFC.Search("BKP").ToList(); It is working fine. But a closer look into the extension method will reveal that Type k = t.GetType(); PropertyInfo pi = k.GetProperty("Name"); is actually inside a foreach loop which is actually not needed. I think we can take it outside the loop. But how? PLease help. (C#3.0)

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  • What postgresql client version should I build against, if server is 8.x?

    - by Ben Voigt
    I'm planning updates to a system that is currently running with 8.x server on Windows, 8.x client on Windows, and 8.x client on Linux. Obviously that seems like a bad choice of platform in a mixed environment, but the Linux machine has no persistent writable storage (as an anti-rootkit measure). I'm concerned with compatibility between versions right now. Can a linux postgresql 9.0.x client connect to a Windows 8.x server? The server is using some third-party binary extensions, so upgrading it is a more involved task and will be done later. If combining a 9.0.x client and 8.x server is discouraged, would latest 8.x clients be able to continue to connect if I did upgrade the server first? META: What tag is appropriate for backward-compatibility questions?

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  • A feeling that I'm not that good developer

    - by Karim
    Hi, Im having a strange feeling, but let me first introduce myself as a software developer. I started to program when I was still a kid, I had about 10 or 11 years. I really enjoy my work and never get bored from it. It's amazing how somebody could be paid for what he really likes to do and would be doing it anyway even for free. WHen I first started to program, I was feeling proud of what I was doing, each application I built was for me a success and after 2-3 year I had a feeling that I'm a coding guru. It was a nice feeling ;-) But the more I was in the field, the more types of software I started to develop I was starting to have a feeling that I'm completely wrong in that I'm guru. I felt that I'm not even a mediocre developer. Each new field I start to work on is giving me this feeling. Like when I once developed a device driver for a client, I saw how much I need to learn about device drivers. When I developed a video filter for an application, I saw how much do I still need to learn about DirectShow, Color Spaces, and all the theory behind that. The worst thing was when I started to learn algorithms. It was several years ago. I knew then the basic structures and algorithms like the sorting, some types of trees, some hashtables, strings etc.. and when I really wanted to learn a group of structures I learned about 5-6 new types and saw that in fact even this small group has several hundred subtypes of structures. It's depressing how little time people have in their lives to learn all this stuff. I'm now a software developer with about 10 years of experience and I still feel that I'm not a proficient developer when I think about things that others do in the industry. Is this normal what I'm experiencing or is it a sign of a destructive excessive ambition? Thanks in advance for any comments.

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  • IE7: container of hidden Div displays incorrectly

    - by dmr
    There is a search box div that contains a boxhead div and a boxbody div. Inside the boxbody div, there is a searchToggle div. When the user clicks a certain link on the page, the display style property of the searchToggle div is toggled between block and none. The 2 background-images for the body of the search box are set via the css of the searchBox div and the boxbody div. In IE7, when the searchToggle div is hidden, the background-image from the searchBox div extends on the left more than it should. It shows up correctly when the display of the searchToggle div is block. Everything show up correctly, in both cases in IE8 and FF. Any ideas why this is happening? The relevant HTML: <div class="searchBox"> <div class="boxhead"> <h2></h2> </div> <div class="boxbody"> <div id="searchToggle" name="searchToggle"> </div> </div> </div> The relevant CSS: .searchBox { margin: 0 auto; width: 700px; background: url(/images/myImageRight-r.gif) no-repeat bottom right; font-size: 100%; text-align: left; overflow: hidden; } .boxbody { margin: 0; padding: 5px 30px 31px; background-image: url(/images/myImageLeft.gif); background-repeat: no-repeat; background-position: left bottom; }

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  • Homebrew build with different arch?

    - by StasM
    I tried to install mysql-connector-c recipe via homebrew, and it builds just fine, but produces x86_64 library: $file ~/brew/lib/libmysql.dylib .../brew/lib/libmysql.dylib: Mach-O 64-bit dynamically linked shared library x86_64 I however need i386 library for my project. I tried to give it CFLAGS and LDFLAGS like this: CFLAGS="-arch i386 -arch x86_64" LDFLAGS="-arch i386 -arch x86_64" brew install mysql-connector-c but nothing changes - it still builds x86_64 only binary. Is there any way to make homebrew build either dual arch library or i386 library? I have kernel architecture set to x86_64, if it matters.

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  • Rails paginate existing array of ActiveRecord results

    - by SaoiseK
    Hello, I generally use will_paginate for the pagination in my app, but have hit a stumbler on my search feature. I'm using Thinking Sphinx for doing my full-text search, which returns results paginated. The problem I'm having is that after I've received the results from Thinking Sphinx, I need to merge them with some other results and re-order them. Once I've finished processing them I have an Array of results that is very different from the original from TS. As there could be 1000+ results in this Array Pagination is a necessity. The problem is that I can't figure out how to get will_paginate to play with an existing array. I've done some research and it seems the only solutions to this problem are from several years ago and are based around the old built-in Paginator class. The most recent one I could find that makes use of will_paginate was from devchix from mid-2007: http://www.devchix.com/2007/07/23/will_paginate-array/comment-page-1/ - I've given this a go but it doesn't seem to do anything for me. Are there any current methods for applying pagination (preferably via will_paginate) for existing arrays of AR results?

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  • iPhone: Does it ever make sense for an object to retain its delegate?

    - by randombits
    According to the rules of memory management in a non garbage collected world, one is not supposed to retain a the calling object in a delegate. Scenario goes like this: I have a class that inherits from UITableViewController and contains a search bar. I run expensive search operations in a secondary thread. This is all done with an NSOperationQueue and subclasses NSOperation instances. I pass the controller as a delegate that adheres to a callback protocol into the NSOperation. There are edge cases when the application crashes because once an item is selected from the UITableViewController, I dismiss it and thus its retain count goes to 0 and dealloc gets invoked on it. The delegate didn't get to send its message in time as the results are being passed at about the same time the dealloc happens. Should I design this differently? Should I call retain on my controller from the delegate to ensure it exists until the NSOperation itself is dealloc'd? Will this cause a memory leak? Right now if I put a retain on the controller, the crashes goes away. I don't want to leak memory though and need to understand if there are cases where retaining the delegate makes sense. Just to recap. UITableViewController creates an NSOperationQueue and NSOperation that gets embedded into the queue. The UITableViewController passes itself as a delegate to NSOperation. NSOperation calls a method on UITableViewController when it's ready. If I retain the UITableViewController, I guarantee it's there, but I'm not sure if I'm leaking memory. If I only use an assign property, edge cases occur where the UITableViewController gets dealloc'd and objc_msgSend() gets called on an object that doesn't exist in memory and a crash is imminent.

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  • How do I detect proximity of the mouse pointer to a line in Flex?

    - by Hanno Fietz
    I'm working on a charting UI in Flex. One of the features I want to implement is "snapping" of the mousepointer to the data points in the diagram. I. e., if the user hovers the mouse pointer over a line diagram and gets close to the data point, I want the pointer to move to the exact coordinates and show a marker, like this: Currently, the lines are drawn on a Shape, using the Graphics API. The Shape is a child DisplayObject of a custom UIComponent subclass with the exact same dimensions. This means, I already get mouseOver events on the parent of the diagram's canvas. Now I need a way to detect if the pointer is close to one of the data points. I. e. I need an answer to the question "Which data points lie within a radius of x pixels from my current position and which of them is closest?" upon each move of the mouse. I can think of the following possibilities: draw the lines not as simple lines in the graphics API, but as more advanced objects that can have their own mouseOver events. However, I want the snapping to trigger before the mouse is actually over the line. check the original data for possible candidates upon each mouse movement. Using binary search, I might be able to reduce the number of items I have to compare sufficently. prepare some kind of new data structure from the raw data that makes the above search more efficient. I don't know how that would look like. I'm guessing this is a pretty standard problem for a number of applications, but probably the actual code usually is inside of some framework. Is there anything I can read about this topic?

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  • Sharing same vector control between different places

    - by Alexander K
    Hi everyone, I'm trying to implement the following: I have an Items Manager, that has an Item class inside. Item class can store two possible visual representations of it - BitmapImage(bitmap) and UserControl(vector). Then later, in the game, I need to share the same image or vector control between all possible places it takes place. For example, consider 10 trees on the map, and all point to the same vector control. Or in some cases this can be bitmap image source. So, the problem is that BitmapImage source can be easily shared in the application by multiple UIElements. However, when I try to share vector control, it fails, and says Child Element is already a Child element of another control. I want to know how to organize this in the best way. For example replace UserControl with other type of control, or storage, however I need to be sure it supports Storyboard animations inside. The code looks like this: if (bi.item.BitmapSource != null) { Image previewImage = new Image(); previewImage.Source = bi.item.BitmapSource; itemPane.ItemPreviewCanvas.Children.Add(previewImage); } else if (bi.item.VectorSource != null) { UserControl previewControl = bi.item.VectorSource; itemPane.ItemPreviewCanvas.Children.Add(previewControl); } Thanks in advance

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  • Why is my ftp connection timing out?

    - by NEPatriot
    This is the log info: Status: Connected Status: Retrieving directory listing... Command: PWD Response: 257 "/" is your current location Command: TYPE I Response: 200 TYPE is now 8-bit binary Command: PASV Response: 227 Entering Passive Mode (173,201,145,1,199,43) Command: MLSD Error: Connection timed out Error: Failed to retrieve directory listing The strange thing is that I've set the transfer mode to active... I've called my hosting company support and they're able to connect to this server using my ftp credentials. I've also tried to connect on another machine on my network and have the same issue. Could it be the firewall? My ISP?

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  • Mac firewall blocking nginx (port 80) from external side

    - by Alex Ionescu
    I installed nginx using ports and started it with sudo. Accessing the nginx welcome page from localhost works perfectly, however accessing it from an external computer fails. Doing an nmap on the computer from the outside reveals 80/tcp filtered http So clearly the mac firewall is blocking the port. I then proceed to add the nginx executable to the firewall exception list as seen in this image, however the nmap still shows up as port 80 being filtered and I'm unable to access the webpage. The exact binary that is in the list is /opt/local/sbin/nginx which to my knowledge seems correct Any ideas what I should do? Thanks! P.S. Turning the firewall off does allow me to access the website from the outside world, however that isn't an ideal solution.

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  • Subscribe to feed in Thunderbird from the command line?

    - by Coderer
    From reading around the web, it looks like Firefox's "quick view" of an RSS feed sometimes lets you "Subscribe to this feed using" Thunderbird. For whatever reason, that's not an automatically-added option with my setup (FF 3.5.something + Thunderbird 3.0.something on Linux), so I figured I could just "Choose Application...", point at the Thunderbird binary, and be on my way. Not so -- nothing appears to happen. If I run thunderbird from the command line as thunderbird "http://path/to/feed" the app launches as normal. If it's already running, absolutely nothing happens. Is this impossible? Is there some mojo I can pass Firefox to tell it that Thunderbird exists? Should I just suck it up and copy/paste the URLs manually?

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  • recover deleted files from other computer

    - by Giorgi
    Hello, I moved a html file from my computer to another and accidentally deleted it from that computer which I accessed from my computer like this: \name\folder As a result the file did not go recycle bin. I tried ntfsundelete and it did found the file on my computer but when I recovered, it looks like as if you opened binary file with notepad. I then tried Recuva and it says that part of the file is overwritten. Is there any chance to recover it? Can I recover it from another computer? Thanks.

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