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• Building using CMake-GUI

  - by goodwince

  I am trying to build Marble on Windows (XP) and have been extremely unsuccessful. Following the instructions written here. I am wanting to build it as QT only. Configuration of the build tree fails. I am using the cmake-gui since I have never tried to compile using cmake it's possible it could be something in there. I found a similar issue; however, they compiled QT using Visual Studio and I am using QT Creator which compiles with MinGW so I need to compile in a different manner. CMake-GUI configuration source-code: MyDirectory/Marble where to build: MyDirectory/Build I also added an entry as.. DQTONLY and it's value set to ON

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• Using Objective-C blocks with old compiler

  - by H2CO3

  I'm using the opensource iPhone toolchain on Linux for developing for jailbroken iPhones. I'd like to take advantage of the new (4.0, 5.0) iOS SDK features, but I can't as my old build of GCC doesn't understand the ^ block syntax. I noticed that blocks are just of type id (struct objc_object *). I know this from two resources: first, class-dump reports them as id, second, Apple docs clarify that "blocks can be retained". My quiestion is, how can I take advantage of blocks using this knowledge? I thought of something like: // this is in SDK 4.x/5.x - (void) doSomethingWithBlock:((int)(^block)(int)); // and I modify it like: - (void) doSomethingWithBlock(id)block; the question is: HOW TO ACTUALLY CALL IT? How do I create blocks? I can, of course, create function pointers (IMPs in particular), but how to achieve the object-like memory layout?

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• Can you return an assignable lvalue in Scala?

  - by Alex R

  (note, lvalue is actually a term from the C grammar, I don't know what it's called in Scala!) Trying to learn Scala... this evening I'm working on an internal DSL for a dynamically scoped language that might resemble PHP syntax. My REPL is: Welcome to Scala version 2.7.6.final (Java HotSpot(TM) Client VM, Java 1.6.0). I have some made-up example code: class $(any: Any) { def update(sym: Symbol, any: Any) { println("line 2 executed");} def -(sym: Symbol) : $ = { println("line 1 executed"); return this } def update(any: Any) { println("line 3 executed");} } The following works as expected: scala var a = new $(0) a: $ = $@19238ad scala a('x) = "blah" line 2 executed On the other hand, why does the following not invoke the 1-parameter update method? scala a = 1 :6: error: type mismatch; found : Int(1) required: $ a = 1 ^ Ultimately, I would like this to work: a-'x = "blah" Thanks

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• Python 3.1.1 Class Question

  - by Protean

  I'm a new Python programmer who is having a little trouble using 'self' in classes. For example: class data: def __init__(self): self.table = [] def add(self, file): self.table.append(file) data.add('yes') In this function I want to have table be a variable stored in the class data and use add to modify it. However, when I run this script it gives me the error: Traceback (most recent call last): File "/Projects/Python/sfdfs.py", line 7, in <module> data.add('yes') TypeError: add() takes exactly 2 positional arguments (1 given) I assume that I am trying to call the function the wrong way in this instance, as this syntax is very similar to an example in the python documentation: http://docs.python.org/3.1/tutorial/classes.html

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• Large svn external

  - by MPelletier

  I have a project which uses a large library residing in its own repository. Using: Tortoise-SVN, the server is running an enterprise edition of VisualSVN The project itself has the "standard" structure: trunk tags branches In each branch, tag, and trunk is the library, set as an external (svn:external property). If I get the entire tree, I get the library several times, which is just getting too ridiculously repetitive. Is there a recommended structure for this? Or perhaps a way not to get all externals (because other externals are much smaller, easier to manipulate)?

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• perl one liner alternative to this bash "chain"?

  - by Michael Mao

  Hello everyone: I am trying to comprehend Perl following the way describe in the book "Minimal Perl". I've uploaded all source txt files onto my own server : results folder I got the output from using several bash commands in a "chain" like this: cat run*.txt | grep '^Bank[[:space:]]Balance'| cut -d ':' -f2 | grep -E '\$[0-9]+' I know this is far from the most concise and efficient, but at least it works... As our uni subject now moves onto the Perl part, I'd like to know if there is a way to get the same results in one line? I am trying something like the following code but stuck in the middle: Chenxi Mao@chenxi-a6b123bb /cygdrive/c/eMarket/output $ perl -wlne 'print; if $n=~/^Bank Balance/' syntax error at -e line 1, near "if $n" Execution of -e aborted due to compilation errors.

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• Why is there no IronPerl (Perl for .Net)?

  - by Renaud Bompuis

  I'm a bit disappointed that there doesn't seem to be any effort to make Perl a first-class citizen of the .Net world. I've read a few 'reasons' in the past but I don't see why they can't be overcome (different garbage collectors, hard-to-parse syntax, part of CPAN modules couldn't be ported, different communities, ...). Activestate has a Perl.Net product but it's a hack (in the good sense) around a standard interpreter and some syntactic sugar to interoperate with .Net assemblies. A few years ago they stopped they visual studio integration of Perl citing lack of interest. That was a while ago, before all the changes to .Net to make it more 'dynamic'. Am I the only one who yearns for IronPerl?

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• Size of static libraries generated by XCode

  - by shaft80

  I have a project tree in XCode that looks like this: AppProject depends on ObjcWrapper that in turn depends on PureCppLib. ObjcWrapper and PureCppLib are static library projects. Combined, all sources barely reach 15k lines of code, and, as expected, the size of resulting binary is about 750Kb in release mode and slightly over 1Mb in debug mode. So far, so good. However, ObjcWraper.a and PureCppLib.a are over 6Mb each in either mode. So the first question is why it is so. But more importantly, how can I ensure that those static libs do not include parts or all of the source code? Thanks in advance!

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• Remove characters after specific character in string, then remove substring?

  - by sah302

  I feel kind of dumb posting this when this seems kind of simple and there are tons of questions on strings/characters/regex, but I couldn't find quite what I needed (except in another language: http://stackoverflow.com/questions/2176544/remove-all-text-after-certain-point). I've got the following code: [Test] public void stringManipulation() { String filename = "testpage.aspx"; String currentFullUrl = "http://localhost:2000/somefolder/myrep/test.aspx?q=qvalue"; String fullUrlWithoutQueryString = currentFullUrl.Replace("?.*", ""); String urlWithoutPageName = fullUrlWithoutQueryString.Remove(fullUrlWithoutQueryString.Length - filename.Length); String expected = "http://localhost:2000/somefolder/myrep/"; String actual = urlWithoutPageName; Assert.AreEqual(expected, actual); } I tried the solution in the question above (hoping the syntax would be the same!) but nope. I want to first remove the queryString which could be any variable length, then remove the page name, which again could be any length. How can I get the remove the query string from the full URL such that this test passes?

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• Optimizing performance of large ASP.NET applications

  - by NLV

  Hello, I'm building a asp.net web application with lots and lots of controls and huge volumes of data. My application is very slow and it is taking a large amount of time to load the data into the .net controls like grid, tree view etc. I also have some ajaxified pages and controls in my application. I want to reduce the page load time in each postbacks. What are the standards/best practices to be followed while developing large asp.net applications? Thank you. NLV

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• Python Fabric error

  - by jwesonga

  I'm running fabric (Django deployment to apache) and everything seems to work fine until I get to the task for installing the site: def install_site(): "Add the virtualhost file to apache" require('release', provided_by=[deploy, setup]) sudo('cd %(path)/releases/%(release)/%(release); cp %(project_name)/%(virtualhost_path)/%(project_domain) /etc/apache2/sites-available/%(project_domain)s') sudo('cd /etc/apache2/sites-available; a2ensite %(project_domain)') I keep getting this error: [173.203.124.16] sudo: cd %(path)/releases/%(release)/%(release); [173.203.124.16] err: /bin/bash: -c: line 0: syntax error near unexpected token `(' [173.203.124.16] err: /bin/bash: -c: line 0: `cd %(path)/releases/%(release)/%(r elease);' Warning: sudo() encountered an error (return code 2) while executing 'cd %(path) /releases/%(release)/%(release);' I've gone through the fabfile.py over and over and I can't see why the error is coming...any ideas?

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• jQuery datepicker getMinDate '+1d'

  - by Adrian Adkison

  Once I have set the minDate property of a datepicker with the convenient string syntax $(elem).datepicker('option','minDate','+1d +3m'); how can I get the date object of the minDate? To help illustrate, there is a method $(elem).datepicker('getDate'); which returns the date that is entered in the input in the format of a date object. I would like the same thing but for datepicker('getMinDate'). There is an option like this $(elem).datepicker('option','minDate'); but this returns '+1d +3m' which is not helpful. I need the actual date object to compare with another date object. Any ideas?

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• [ext js] Renderer for ColumnTree?

  - by Chris Cowdery-Corvan

  Hello! I'm trying to add a custom renderer to a ColumnTree in Ext JS. Since it appears(?) that this isn't supported, does anyone know of any workaround to use a renderer? Here's a snippet of code - let's just say (hypothetically) that I have a renderer I'd like to use for the documentsVersion tab below - does anyone have any ideas? return new Ext.tree.ColumnTree({ autoHeight: false, rootVisible: showRoot, autoScroll: false, id: (!treeId)? window.mainTreeId: treeId, loader: (!loader)?window.docTreeLoader:loader, columns: [{ header:"${documentsTitle}", width: windowWidth * 0.40 }, { header:"${documentsVersion}", width: windowWidth * 0.10, dataIndex:'version' }, Thanks!

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• How to share cookies across multiple Apache Virtual Hosts

  - by puk

  This question is generally phrased as "How to share cookies across multiple subdomains" and the answer is generally to use the leading dot like so setcookie( 'id', 0, time()+30*3600, '/', '.example.com' ); which means that the cookie is available to all subdomains of example.com. However, the / path I suspect adds the constraint that all subdomains must be physically under the same tree. The PHP documentation states path The path on the server in which the cookie will be available on. If set to '/', the cookie will be available within the entire domain. If set to '/foo/', the cookie will only be available within the /foo/ directory and all sub-directories such as /foo/bar/ of domain. The default value is the current directory that the cookie is being set in. Is it possible to share cookies if one has two (Apache) Virtual Hosts set up with document roots at, for example www.one.example.com ? /var/www/example1 www.two.example.com ? /var/www/example2

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• Shopping Portal based on XML Data - XSLT or PHP?

  - by buggy1985

  For my bachelor thesis I want to implement a shopping (price comparison) portal prototype based on XML Data. The main requirement is to get a very clear and customizable HTML template, which should be hosted by the customer on his own webserver. I'm not very sure if XSLT meets this requirements, as it generates a lot of xsl-related code. It is not easy to understand for people with little HTML skills. I have some experience with the PHP templating engine Smarty. The syntax is much better, but I'm not sure if it's a good idea to parse the XML data with PHP, as it is very complex. Which language should I choose for a web application with high complexity? XSLT or PHP?

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• Batch file conversion to vbscript

  - by blademasterson

  I need to convert a batch file to vbscript but am unfamiliar with both. If I can understand what is going on in the batch file I can work out the vbscript easy enough. Problem is the batch file runs a few cscript commands which is supposed to have a syntax of cscript [script name] [host options] [script arguments] However whomever wrote the batch file doesn't use it in a standard manner so if someone could explain the use of the command I can work out the rest. Sample line: Filename and actual url's removed for safety sake cscript file.vbs -a -r url -h url -o raw

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• Reading multiple Emacs info files simultaneously

  - by pajato0

  For reading programming (and other) documentation, the Emacs INFO mode is outstanding. So outstanding that I would like to be able to read say, the Emacs Lisp info file and the org-mode info files simultaneously without traversing back up to the beginning of the info tree. Either I've missed something obvious or I will need to hack some Emacs Lisp to achieve the goal. And yet again, someone may have already cracked this nut. So I guess my question is: what is the state of the practice for reading mulitple INFO files in Emacs simultaneously?

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• Studying MySQL, SQLite source code to learn about RDBMS implementation

  - by Yang

  I know implementing database is a huge topic, but I want to have a basic understanding of how database systems work (e.g. memory management, binary tree, transaction, sql parsing, multi-threading, partitions, etc) by investigating the source code of the database. Since there are a few already proven very robust open source databases like mysql, sqlite and so on. However, the code are very complicated and I have no clue where to start. Also I find that the old school database textbooks are only explaining the theory, not the implementation details. Can anyone suggest how I should get started and if there are any books that emphasis on the technology and techniques of building dbms used in modern database industry?

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• Accessing a file in Windows and Linux when working with JAVA+Eclipse.

  - by Gabriel A. Zorrilla

  Hi there. I'm doing some JAVA coding at home and at work. At home i have Linux, work, Windows. The rootpath to X file in Windows is c:\Documents And Settings\User\My Documents\Dropbox\file.xxx and in Linux is something like /media/My Documents/Dropbox/file.xxx So, every time i edit in either system, i have to manually change the root of the file in a new File(FILEPATH) statement. Is there a workaround for this? I bet if the file root is relative to the project resource tree would do the trick, but that's an Eclipse based solution, not JAVA, i believe.

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• if_attribute on declarative authorization

  - by Victor Martins

  I have a many-to-many relationship like this: A user has_many organizations through affiliations and vice-versa. I'm using declarative organizations and I only want a user to edit a particular organization if he is affiliated and the affiliationtype attribute of affiliation is a particular value. So affiliations has 3 columns , user_id, organization_id and affiliationtype_id I can do: o = Organization.find(:first) o.affiliatons[0].user and get the user now I wish to do this: has_permission_on [:organizations], :to => :edit do if_attribute (...) end That if_attribute should see if the current user is the organization.affiliation[?].user and if the organization.affiliation[?].affiliationtype_id = "3" I hope this is syntax issue ... I really need to get this working.

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• MIPS assembly: how to declare integer values in the .data section?

  - by Barney

  I'm trying to get my feet wet with MIPS assembly language using the MARS simulator. My main problem now is how do I initialize a set of memory locations so that I can access them later via assembly language instructions? For example, I want to initialize addresses 0x1001000 - 0x10001003 with the values 0x99, 0x87, 0x23, 0x45. I think this can be done in the data declaration (.data) section of my assembly program but I'm not sure of the syntax. Is this possible? Alternatively, in the .data section, how do I specify storing the integer values in some memory location (I don't care where, but I just want to reference them somewhere). So I'm looking for the C equivalent of "int x = 20, y=30, z=90;" I know how to do that using MIPS instructions but is it possible to declare something like that in the .data section of a MIPS assembly program?

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• Assign table values to multiple variables using a single SELECT statement and CASE?

  - by Darth Continent

  I'm trying to assign values contained in a lookup table to multiple variables by using a single SELECT having multiple CASE statements. The table is a lookup table with two columns like so: [GreekAlphabetastic] SystemID Descriptor -------- ---------- 1 Alpha 2 Beta 3 Epsilon This is my syntax: SELECT @VariableTheFirst = CASE WHEN myField = 'Alpha' THEN tbl.SystemID END, @VariableTheSecond = CASE WHEN myField = 'Beta' THEN tbl.SystemID END, @VariableTheThird = CASE WHEN myField = 'Epsilon' THEN tbl.SystemID END FROM GreekAlphabetastic tbl However, when I check the variables after this statement executes, I expected each to be assigned the appropriate value, but instead only the last has a value assigned. SELECT @VariableTheFirst AS First, @VariableTheSecond AS Second, @VariableTheThird AS Third Results: First Second Third NULL NULL 3 What am I doing wrong?

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• PHP eval issue with PHP + HTML code

  - by i-CONICA

  Hi, I've got PHP and HTML code stored in a database table. When I get this data, I need to echo the HTML and process the PHP. I thought I could use eval() for this, which works, if I do this eval("echo 'dlsj'; ? EVALED "); I get dlsjEVALED printed out. The problem is, I get a fatal error when I run longer scripts. Things like: Parse error: syntax error, unexpected '<' in /home/content.php(18) : eval()'d code on line 1 Any advice = awesome. Thanks.

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• ASP.NET MVC2 Data Access Layer

  - by Paul

  For a small/medium sized project I'm trying to figure out what is the 'ideal' way to have a domain layer and data access layer. My opinions on coupling tend to be more towards the view that the domain models should not be tightly coupled with the database layer, in other words the data access layer shouldn't actually know anything about the domain objects. I've been looking at Linq-to-sql and it wants to use its own models that it creates, and so it ends up VERY tightly coupled. Whilst I love the way you use linq-to-sql in code I really don't like the way it wants to make its own domain objects. What are some alternatives that I should consider? I tried use NHibernate but I did not like the way I had to use to query and get different objects. I honestly love the syntax and way you use linq, I just don't want it to be so tightly coupled to domain objects.

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• how to echo data that we read with file_get_contents

  - by Ronnie Chester Lynwood

  hello. im trying to echo YH if $url contains http://yahoo.com/ ! how can i do it? I've tried something like this; $url = "'".$get['url']."'"; $needle = "http://yahoo.com/"; $contents = file_get_contents($url); if(stripos($contents, $needle) !== false) { $qqq = "YH"; } but it's not working. can anybody help me with true syntax? thanks..

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