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  • Custom installation directories

    - by Alex Farber
    Let's say I am writing installation script for the program which contains executable file and shared library. By default, this script places executable to /usr/local/bin, and shared library to /usr/local/lib. In this case my program may be executed by any user by typing its name in the command line. Suppose that user selects custom installation directory, like ~/myprogram/. Is it user's responsibility to ensure that my program may be executed, or my installation script must do this?

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  • How to override j_security_check in glassfish?

    - by Alex B
    I'm currently using FORM based authentication in glassfish v2.1 to log users in and it works fine. I want to switch to ProgrammaticLogin and I want to be able to get the initially requested URL (i.e. before redirecting to login page) and use it in my programmatic login code so that the user is redirected back to the requested page after authentication. I've seen the source code for j_security_check - in my case that's FormAuthenticator (catalina codebase) and it saves the initial request in a SavedRequest object in the session but that session is a StandardSession rather than HttpSession so there's no direct way to access it. Or should I change the authentication mechanism from FORM to something else? Thanks!

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  • Turn Function or Stored Procedure Result into "live" Result for LINQ

    - by Alex
    Is it possible to turn result sets obtained in LINQ through a stored procedure or function call into a "live" set of objects of which I can retrieve Foreign Key related objects? If, for example, my stored procedure returns a set of rows (= LINQ objects) of type "Contact", then I can't seem to obtain Contact.BillingAddress (which is related by Foreign Key). Any idea how to make this work?

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  • Why would a variable in Scala code mysteriously become null?

    - by Alex R
    I've isolated the problem down to this: Predef.println("the value of argv1 here is " + argv(1)); var n: $ = undef; n = argv(1); Predef.println("the value of argv1 here is " + argv(1)); Predef.println("the value of n here is " + n); Predef.println("the class of n here is " + n.getClass); Here's the definition of $: class $ { println("constructed a new $ of type: " + this.getClass); def value: $ = this; def toValue: Value = { new ConstStringValue(this.toString()) }; def -(sym: Symbol): $ = { println("looked up: " + sym); this } def -(sym: $): $ = { println("looked up: " + sym); this } def update(sym: Symbol, any: Any) { println("update called: " + sym + "=" + any); } def apply(sym: Symbol) = { this } def apply(obj: $) = { this } def apply() = { this } def +(o:$) = this.toValue.div(o.toValue) def *(o:$) = this.toValue.mul(o.toValue) def >(o:$) = this.toValue.gt(o.toValue) def <(o:$) = this.toValue.lt(o.toValue) def ++() = { this } def -=(o:$) = { this } } When run, the code prints: the value of argv1 here is 10 the value of argv1 here is 10 the value of n here is null java.lang.NullPointerException at test_1_php$.include(_tmp.scala:149) at php.script.main(php.scala:57) at test_1_php.main(_tmp.scala) [...] Why would n mysteriously lose its value (or fail to take one on)?

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  • Sql Server 2008 Cross-database table linking (relationships)

    - by Alex
    Hi guys, I have a bit of an issue, and to be honest I don't think there's an answer, but I'll give it a try anyway. So I have two databases [A]-Company and [B]-Product. Both databases have a Country table which is then linked to other tables in each individual database. The problem is that the data between the two Country tables is a complete duplicate. So, I essentially have to duplicate some of the relationships in each database, and maintenance on top of that is just difficult... So, I'm curious is there a way to create a cross-database relationship between tables so I can have only one set of Country+Helper tables that govern both databases? Thanks in advance!

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  • Why are symbols not frozen strings?

    - by Alex Chaffee
    I understand the theoretical difference between Strings and Symbols. I understand that Symbols are meant to represent a concept or a name or an identifier or a label or a key, and Strings are a bag of characters. I understand that Strings are mutable and transient, where Symbols are immutable and permanent. I even like how Symbols look different from Strings in my text editor. What bothers me is that practically speaking, Symbols are so similar to Strings that the fact that they're not implemented as Strings causes a lot of headaches. They don't even support duck-typing or implicit coercion, unlike the other famous "the same but different" couple, Float and Fixnum. The mere existence of HashWithIndifferentAccess, and its rampant use in Rails and other frameworks, demonstrates that there's a problem here, an itch that needs to be scratched. Can anyone tell me a practical reason why Symbols should not be frozen Strings? Other than "because that's how it's always been done" (historical) or "because symbols are not strings" (begging the question). Consider the following astonishing behavior: :apple == "apple" #=> false, should be true :apple.hash == "apple".hash #=> false, should be true {apples: 10}["apples"] #=> nil, should be 10 {"apples" => 10}[:apples] #=> nil, should be 10 :apple.object_id == "apple".object_id #=> false, but that's actually fine All it would take to make the next generation of Rubyists less confused is this: class Symbol < String def initialize *args super self.freeze end (and a lot of other library-level hacking, but still, not too complicated) See also: http://onestepback.org/index.cgi/Tech/Ruby/SymbolsAreNotImmutableStrings.red http://www.randomhacks.net/articles/2007/01/20/13-ways-of-looking-at-a-ruby-symbol Why does my code break when using a hash symbol, instead of a hash string? Why use symbols as hash keys in Ruby? What are symbols and how do we use them? Ruby Symbols vs Strings in Hashes Can't get the hang of symbols in Ruby

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  • data directory in automake

    - by Alex Farber
    I have some data files that should be distributed with my program. Using dist_pkgdata_DATA in Makefile.am, I get these files installed to /usr/local/data/share/package-name. The problem is that data is read-only, and my program needs to modify it. Playing with dist_sharedstate_DATA, dist_localstate_DATA, dist-data_DATA varibles, I got different installation directories, like /usr/local/com, usr/local/var, but data is always read-only. How can I distribute modifiable data files with my package? I need some common directory for all users, or maybe local data in a user directory.

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  • Javascript function as a parameter to another function?

    - by Alex
    Hello there, I'm learning lots of javascript these days, and one of the things I'm not quite understanding is passing functions as parameters to other functions. I get the concept of doing such things, but I myself can't come up with any situations where this would be ideal? My question is: When do you want to have your javascript functions take another function as a parameter? Why not just assign a variable to that functions return value and pass that variable to the function like so: // Why not do this var foo = doStuff(params); callerFunction(foo); //instead of this callerFunction(doStuff); I'm confused as to why I would ever choose to do things as in my second example. Why would you do this? What are the use cases? Thanks!!

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  • Call jquery datepicker from link and send the date through a post call

    - by Alex
    Hi all, I need to make the datepicker show when I click on a link and then send the selected date to a different page through a post call. T tried to use this code for the link call: $(".click-on-link").click(function(){ $('#datepicker').datepicker({ changeMonth: true, changeYear: true, dateFormat: 'dd/mm/yy', firstDay: 1 }); }); but it's not working. Any idea? Thanks!

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  • Cast LINQ Function Result to Domain Object

    - by Alex
    Hello, I have a table valued function to perform full text search on SQL server. The result type of my full text search function in LINQ is a special autogenerated type which includes KEY and RANK in addition to my regular domain object properties. So, if my regular domain object is PERSONS (with properties FirstName, LastName etc.), I also have a result object PERSONS_FTSResult with the same properties + KEY and RANK. Is there an easy way to cast it back to PERSONS?

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  • Dynamic Linq query issue

    - by Alex
    Hey All, Im trying to query the Netflix OData feed. I have the following query that works fine in LinqPad: from g in Genres from t in g.Titles where g.Name == "Horror" && t.AverageRating == 2 && t.ReleaseYear == 2004 select t But, when I move it over to my Silverlight app, the user selects what to search on so I may or may not have all of the params. That being the case, I need to construct the query at runtime. Ive looked the the Dynamic Query stuff and that will do fine...the issue that I have is that I need an initial acceptable query to append to and this doesn't fly: from g in Genres from t in g.Titles select t; Any additional thoughts would be appreciated. Thanks in advance

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  • How to start/stop CrossSlide (jQuery)

    - by Alex
    I found that CrossSlide causes video playback on the same page to stutter quite badly. My thought was to have the cross slide effect on the same page stop or pause during video play back, annd then start again when video stops. Id doesn't look like there is any start stop function included. Does any one know how I might be able to accomplish this? Thanks.

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  • Is there a way to force HTTPS protocol in a Kohana 2.3 site?

    - by alex
    I've got a site built on top of Kohana 2.3 which I now have to make all links https. I set this in application/config/config.php. $config['site_protocol'] = 'https'; This makes all links on the site use the https protocol. Except, when I first enter the site via http, it will not automatically forward to https. Is there a way to make Kohana do this, or do I just need to do some custom coding? I've found this .htaccess rule too, will it be fine to just drop this in? RewriteEngine On RewriteCond %{SERVER_PORT} !=443 RewriteRule ^ https://yourdomain.tld%{REQUEST_URI} [NS,R,L] Thanks.

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  • Future of VB.NET? [closed]

    - by Alex Yeung
    Hi all, I worked with C# for years. Last year, I changed my job and the company use VB.NET. Of course, theoretically C# and VB.NET are very similar and I easily adapted. However, I have worked for VB.NET for 1 year. I cannot see any future of VB.NET. As a programming language, it is so foo. Here is a list of what C# can do but VB.NET cannot Case insensitive variables how to think a new variable name? If I have a property called FolderPath, i need to establish another private variable called _folderPath or m_folderPath. In C#, FolderPath and folderPath are two variables. Moreover, it gets compile error if variable name is same as a class name. For example Dim guid = Guid.NewGuid(). (What the...) Again, I need to think a new variable name. Adhoc scope In C#, we could use {...} to create a adhoc scope and all resource in {...} will not affect the code outside. However there is not such syntax in VB.NET. I could only use If True Then and End If to make a local scope which is so unclear. In-Method Region Sometime, it is unavoidable to have a long long method. VB.NET does not support in-method region. I always need to scroll down for 1000 lines. It wastes my time. No multi-line string definition In C#, we could var s = @"..." to define a multi-line string. In VB.NET there is no direct method to do that. The indirect way is use XML-literal string. Dim s = <![CDATA[...]]>.Value. However it is unclear. No block comment In C#, we have line comment // and block comment /* ... */. However in VB.NET we only have line comment which is a very big trouble for me. No statement end symbol Statements are separated by line break in VB.NET; while statements are separated by ; in C#. Underscore I think many people know underscore _ is continue statement symbol. I really disagree with that. I know MS VB.NET language team is going to remove the underscore syntax from VB.NET. However what can we do now? Although underscore is removed in the future, what's the advantage of that? I cannot see any advantage! With scope With scope is an evil scope. Although it allows shorter statement, it is hard to trace. Default Namesapce in project level It is a nightmare for me. The only advantage of VB.NET is property initialization. I think C# cannot do that (correct me if I am wrong.) Public Property ThisIsMyProperty As String = "MyValue" Remarks: I don't think optional method parameters is an advantage of OOP. By those disadvantages, I cannot see the future of VB.NET. Anyone sees the future of VB.NET?

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  • Best WordPress "contact us" plugin?

    - by alex
    I've seen a few, and tried out Contact Form 7, which is pretty good but by default looks quite ugly. I've also had a quick dig, and it looks hard to add some hooks for CSS. It also doesn't use the label element. What is the best standards compliant easy skinnable contact Wordpress plugin in your experience?

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  • Array Undefined index error (notice) in PHP

    - by Alex
    I have this function: function coin_matrix($test, $revs) { $coin = array(); for ($i = 0; $i < count($test); $i++) { foreach ($revs as $j => $rev) { foreach ($revs as $k => $rev) { if ($j != $k && $test[$i][$j] != null && $test[$i][$k] != null) { $coin[$test[$i][$j]][$test[$i][$k]] += 1 / ($some_var - 1); } } } } return $coin; } where $test = array( array('3'=>'1','5'=>'1'), array('3'=>'2','5'=>'2'), array('3'=>'1','5'=>'2'), array('3'=>'1','5'=>'1')); and $revs = array('3'=>'A','5'=>'B'); the problem is that when I run it, it returns these errors (notices): Notice: Undefined index: 1 at line 10 Notice: Undefined index: 1 at line 10 Notice: Undefined index: 2 at line 10 Notice: Undefined index: 2 at line 10 Notice: Undefined index: 2 at line 10 Notice: Undefined index: 1 at line 10 which is this line: $coin[$test[$i][$j]][$test[$i][$k]] += 1 / ($some_var - 1); Any suggestion is greatly appreciated! Thanks!

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  • Documenting Objective C classes, methods and variables

    - by Alex Reynolds
    What are good approaches to documenting ObjC classes, variables and methods, esp. for automated, downstream class creation, documentation creation, and general integration with Xcode? As an example, I like to use: #pragma mark - #pragma mark UITextField delegate methods for demarcating chunks of code of interest, for quick access from within Xcode.

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  • How can I test a CRON job with PHP?

    - by alex
    This is the first time I've ever used a CRON. I'm using it to parse external data that is automatically FTP'd to a subdirectory on our site. I have created a controller and model which handles the data. I can access the URL fine in my browser and it works (however I will be restricting this soon). My problem is, how can I test if it's working? I've added this to my controller for a quick and dirty log $file = 'test.txt'; $contents = ''; if (file_exists($file)) { $contents = file_get_contents($file); } $contents .= date('m-d-Y') . ' --- ' . PHP_SAPI . "\n\n"; file_put_contents($file, $contents); But so far only got requests logged from myself from the browser, despite having my CRON running ever minute. 03-18-2010 --- cgi-fcgi 03-18-2010 --- cgi-fcgi I've set it up using cPanel with the command index.php properties/update/ the 2nd portion is what I use to access the page in my browser. So how can I test this is working properly, and have I stuffed anything up? Note: I'm using Kohana 3. Many thanks

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  • Developing installation packages in Linux

    - by Alex Farber
    I need information about making installation packages for Linux. I want to make simple package, containing executable + shared libraries, and SDK package for programmers, with executables and h-files. How can this be done? Articles, books, samples - everything that can help to learn this issue.

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  • F# return type coercion

    - by Alex
    Hi, In F# I have a function that returns System.Linq.Expression instances: and System.Object with member this.ToExpression() = match this with | :? System.Int32 -> Expression.Constant(this) :> Expression | :? System.Boolean -> Expression.Constant(this) :> Expression | :? Tml.Runtime.Seq as s -> s.ToExpression() | _ -> failwith "bad expression" If I omit the type coercions on the return values F# will infer the return type of the function to ConstantExpression. My first thought was to explicitly mark the return type as being : #Expression, but that didn't work. Is there a more elegant way of doing this that doesn't involve manually casting return types to the most generic type? Thanks.

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  • Modify 3rd party code in subversion

    - by Alex
    I use a script for my homepage but I'd like to localize it. Furthermore the CSS uses images from a special folder which does not fit to my folder hierarchy. Because I don't want to adopt these paths and settings I'll have to modify the original sources. Currently my repository looks like this: /3rdParty /CompanyA /CompanyAProduct1 /v1_0 /v1_1 /MyProductA /branches /tags /trunk /import /export /source Via svn:externals I map all stuff I need (lib, dll, or code) into the import folder. Now I'd like to modify the files in the import folder but this will modify the original sources, too (as far as I know). What is the best solution to have the modified version in my import folder but the original sources remain unaffected? Should I make a branch of the 3rd party code? But then I have to update the original sources for every new release. Thanks!

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