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• Extract a subset of XML file using XSL

  - by Lucas -luky- Noleto

  I have this XML file: <Response> <errorCode>error Code</errorCode> <errorMessage>msg</errorMessage> <ResponseParameters> <className> <attribute1>a</attribute1> <attribute2>b</attribute2> </className> </ResponseParameters> </Response> And I want the output to be: <className> <attribute1>a</attribute1> <attribute2>b</attribute2> </className> My current XSL file is including also "ResponseParameters" tag, which I do not want. EDIT: note that the node className is dynamic. I do not know what will be this name at runtime. <?xml version="1.0"?> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"> <xsl:output indent="yes" /> <xsl:template match="/"> <xsl:copy-of select="//ResponseParameters"> </xsl:copy-of> </xsl:template> </xsl:stylesheet>

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• ICollectionView.SortDescriptions sort does not work if underlying DataTable has zero rows

  - by BigBlondeViking

  We have a WPF app that has a DataGrid inside a ListView. private DataTable table_; We do a bunch or dynamic column generation ( depending on the report we are showing ) We then do the a query and fill the DataTable row by row, this query may or may not have data.( not the problem, an empty grid is expected ) We set the ListView's ItemsSource to the DefaultView of the DataTable. lv.ItemsSource = table_.DefaultView; We then (looking at the user's pass usage of the app, set the sort on the column) Sort Method below: private void Sort(string sortBy, ListSortDirection direction) { ICollectionView dataView = CollectionViewSource.GetDefaultView(lv.ItemsSource); dataView.SortDescriptions.Clear(); var sd = new SortDescription(sortBy, direction); dataView.SortDescriptions.Add(sd); dataView.Refresh(); } In the Zero DataTable rows scenario, the sort does not "hold"? and if we dynamically add rows they will not be in sorted order. If the DataTable has at-least 1 row when the sort is applied, and we dynamically add rows to the DataTable, the rows com in sorted correctly. I have built a standalone app that replicate this... It is an annoyance and I can add a check to see if the DataTable was empty, and re-apply the sort... Anyone know whats going on here, and am I doing something wrong? FYI: What we based this off if comes from the MSDN as well: http://msdn.microsoft.com/en-us/library/ms745786.aspx

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• Examples of localization in Perl using gettext and Locale::TextDomain, with fallback if Locale::Text

  - by Jakub Narebski

  The "On the state of i18n in Perl" blog post from 26 April 2009 recommends using Locale::TextDomain module from libintl-perl distribution for l10n / i18n in Perl. Besides I have to use gettext anyway, and gettext support in Locale::Messages / Locale::TextDomain is more natural than in gettext emulation in Locale::Maketext. The subsection "15.5.18 Perl" in chapter "15 Other Programming Languages" in GNU gettext manual says: Portability The libintl-perl package is platform independent but is not part of the Perl core. The programmer is responsible for providing a dummy implementation of the required functions if the package is not installed on the target system. However neither of two examples in examples/hello-perl in gettext sources (one using lower level Locale::Messages, one using higher level Locale::TextDomain) includes detecting if the package is installed on the target system, and providing dummy implementation if it is not. What is complicating matter (with respect to detecting if package is installed or not) is the following fragment of Locale::TextDomain manpage: SYNOPSIS use Locale::TextDomain ('my-package', @locale_dirs); use Locale::TextDomain qw (my-package); USAGE It is crucial to remember that you use Locale::TextDomain(3) as specified in the section "SYNOPSIS", that means you have to use it, not require it. The module behaves quite differently compared to other modules. Could you please tell me how one should detect if libintl-perl is present on target system, and how to provide dummy fallthrough implementation if it is not installed? Or give examples of programs / modules which do this?

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• Threading 101: What is a Dispatcher?

  - by Water Cooler v2

  Once upon a time, I remembered this stuff by heart. Over time, my understanding has diluted and I mean to refresh it. As I recall, any so called single threaded application has two threads: a) the primary thread that has a pointer to the main or DllMain entry points; and b) For applications that have some UI, a UI thread, a.k.a the secondary thread, on which the WndProc runs, i.e. the thread that executes the WndProc that recieves messages that Windows posts to it. In short, the thread that executes the Windows message loop. For UI apps, the primary thread is in a blocking state waiting for messages from Windows. When it recieves them, it queues them up and dispatches them to the message loop (WndProc) and the UI thread gets kick started. As per my understanding, the primary thread, which is in a blocking state, is this: C++ while(getmessage(/* args &msg, etc. */)) { translatemessage(&msg, 0, 0); dispatchmessage(&msg, 0, 0); } C# or VB.NET WinForms apps: Application.Run( new System.Windows.Forms() ); Is this what they call the Dispatcher? My questions are: a) Is my above understanding correct? b) What in the name of hell is the Dispatcher? c) Point me to a resource where I can get a better understanding of threads from a Windows/Win32 perspective and then tie it up with high level languages like C#. Petzold is sparing in his discussion on the subject in his epic work. Although I believe I have it somewhat right, a confirmation will be relieving.

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• Looking for a communication framework for delphi

  - by Ryan

  I am looking for a communication framework for delphi, we know there are so many communication frameworks for other languages , wcf, ecf and so forth, but i have nerver found the one for delphi till now , anybody who knows about it can give me an ider? There are some requirements i need ,as follows: Building an application(server or client) without caring how to do communications with each other between two endpoints. Imagine that we use mailbox for exchanging messages,it seems that the communication is transparent. Supports communication protocol extending. We often need to exchange the messages between 2 devices, but the communication protocol is not a public or general one, so we need to extend the framework,to implement a communication protocol for receiving or sending a message completely. Supports asynchronous and synchronous communication Supports transmission protocol extending. The transmission protocol can implemented by winsocket, pipes, com, windows message, mailslot and so forth. In client application, we can write code snips like follows: var server: TDelphiCommunicationServer; session : ICommunicationSession; request, response: IMessage; begin session := server.CreateSession('IP', Port); request := TLoginRequest.Create; session.SynSendMessage(request); session.WaitForMessage(response, INFINITE); ....... end; In above code snips , TLoginRequest has implemented the message interface.

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• PHP4 including file during session

  - by Matherw

  I am trying to put second language on my webpage. I decided to use different files for different languages told apart by path - language/pl/projects.ln contains Polish text, language/en/projects.ln - English. Those extensions are just to tell language files from other, the content is simple php: $lang["desc"]["fabrics"]["title"] = "MATERIALY"; $lang["desc"]["fabrics"]["short_text"] = "Jakis tam tekst na temat materialów"; $lang["desc"]["services"]["title"] = "USLUGI"; $lang["desc"]["services"]["short_text"] = "Jakis tam tekst na temat uslóg"; And then on the index page I use it like so: session_start(); if (isset($_SESSION["lang"])) { $language = $_SESSION["lang"]; } else { $language = "pl"; } include_once("language/$language/projects.ln"); print $lang["desc"]["fabrics"]["title"]; The problem is that if the session variable is not set everything works fine and array item content is displayed but once I change and set $_SESSION["lang"] nothing is displayed. I tested if the include itself works as it should by putting print "sth"; at the beginning of projects.ln file and that works all right both with $_SESSION["lang"] set and unset. Please help.

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• Question regarding the iPhone In App Purchase capabilities

  - by Wesley

  Hi everyone. I am working on releasing an app that will greatly benefit from using the in app purchase model. The app is a sort of book viewer, and the content I would like to make available for purchase will be more books in various languages. Each book is stored in sqlite format, in separate .db files. Now, the way that my developer has set it all up is that he added a line onto the bottom of the info.plist file called databases. Inside that database section, I can type in 'es' as the key, and for the value the name of the spanish database, and it populates in a uitableview in spanish, using NSLocale. So it is very easy to setup and implement different databases, which is great, but now I am confused about how I can implement my in app purchase model. Sorry about the long winded intro, here is my question: Is it possible to have an in app purchase add a line to my info.plist file? Or if not, is it possible to have the purchase reveal a new and updated plist file altogether that I would have already setup correctly? Any help here would be appreciated. Thanks

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• Implementing a 2 Legged OAuth Provider

  - by Rob Wilkerson

  I'm trying to find my way around the OAuth spec, its requirements and any implementations I can find and, so far, it really seems like more trouble than its worth because I'm having trouble finding a single resource that pulls it all together. Or maybe it's just that I'm looking for something more specialized than most tutorials. I have a set of existing APIs--some in Java, some in PHP--that I now need to secure and, for a number of reasons, OAuth seems like the right way to go. Unfortunately, my inability to track down the right resources to help me get a provider up and running is challenging that theory. Since most of this will be system-to-system API usage, I'll need to implement a 2-legged provider. With that in mind... Does anyone know of any good tutorials for implementing a 2-legged OAuth provider with PHP? Given that I have securable APIs in 2 languages, do I need to implement a provider in both or is there a way to create the provider as a "front controller" that I can funnel all requests through? When securing PHP services, for example, do I have to secure each API individually by including the requisite provider resources on each? Thanks for your help.

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• Yii: Multi-language website - best practices.

  - by michal

  Hi, I find Yii great framework, and the example website created with yiic shell is a good point to start... however it doesn't cover the topic of multi-language websites, unfortunately. The docs covers the topic of translating short messages, but not keeping the multi-lingual content ... I'm about to start working on a website which needs to be in at least two languages, and I'm wondering what is the best way to keep content for that ... The problem is that the content is mixed extensively with common elements (like embedded video files). I need to avoid duplicating those commons ... so far I used to have an array of arrays containing texts (usually no more than 1-2 short paragraphs), then the view file was just rendering the text from an array. Now I'd like to avoid keeping it in arrays (which requires some attention when putting double quotations " " and is inconvenient in general...). So, what is the best way to keep those short paragraphs? Should I keep them in DB like (id | msg_id | language | content ) and then select them by msg_id & language? That still requires me to create some msg_id's and embed them into view file ... Is there any recommended paradigm for which Yii has some solutions? Thanks, m.

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• Why Does My Website Redirect me to my localhost?

  - by Noah Brainey

  Alright, my website has some issues that I'm not sure what's causing them. Visit this page http://online-file-sharing.net/tos.html and click one of the bottom footer links... it redirects you to your localhost in the address bar. I have no idea why it does this. I'm hosting this website on my own server, which is this computer, and using Xampp. If this information helps. Anyways any help would be greatly appreciated! I'm also using DYNDNS as my nameservers. I've already ask this question on superuser and webapps QnA sites neither could help. They said to come here. Another thing to note is that this website runs on one script and not multiple scripts (upload.cgi). However there are three files that aren't dynamic and aren't part of the upload.cgi file... these are about.html, browse.html and tos.html. Another thing to note is that my homepage which is upload.cgi can only be accessed by manually typing in online-file-sharing.net/cgi-bin/upload.cgi (which isn't it's real location but it seems to recognize it this way... but redirects me to my localhost). .htaccess file code: DirectoryIndex upload.cgi My upload.cgi path code: my $version = "4.14"; $ENV{PATH} = '/bin:/usr/bin'; delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'}; ($ENV{DOCUMENT_ROOT}) = ($ENV{DOCUMENT_ROOT} =~ /(.*)/); # untaint. #$ENV{SCRIPT_NAME} = '/cgi-bin/upload.cgi'; use lib './perlmodules'; #use Time::HiRes 'gettimeofday'; #my $hires_start = gettimeofday(); my (%PREF,%TEXT) = (); The script I'm using is FileChucker. I hope this information is enough to find an answer... if not please let me know and I'll post as much information as you need!

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• Seperating Javascript and Html, when dynamically adding html via javascript

  - by optician

  I am currently building a very dynamic table for a list application, which will basically perform basic CRUD functions via AJAX. What I would like to do is separate the visual design and javascript to the point where I can change the design side without touching the JS side. This would only work where the design stays roughly the same(i would like to use it for rapid protyping) Here is an example. <table> <tr><td>record-123</td><td>I am line 123</td><td>delete row</td></tr> <tr><td>record-124</td><td>I am line 124</td><td>delete row</td></tr> <tr><td>record-125</td><td>I am line 125</td><td>delete row</td></tr> <tr><td>add new record</td></tr> </table> Now, when I add a new record, I would like to insert a new row of html, but I would rather not put this html into the javascript file. What I am considering is creating a row like this on the page, near the table. <tr style='visble:none;' id='template-row'><td>record-id</td><td>content-area</td><td>delete row</td></tr> And when I come to add the new row, I search the page for the tags with the id=template-row , and then grab it, do a string replace on it, and then put it in the right place in the page. As long as the design doesn't shift radically, and I keep the placeholder strings the same, it means designs can be quickly modified without touching the js. Can any give any advice on a methodology like this?

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• wpf - window to be tight round user control

  - by Andy Clarke

  Hi, I've got a user control that I'm loading into a Window dynamically - I wanted to set the Window so that it didn't have a size and then I thought the window to resize accordingly depending on the UserControl. However it dosn't - can anyone assist please? I've made a very basic example - I've cut out the dynamic bits and just put a UserControl in a Window. What do I need to do to get the window to be tight around the UserControl? Thanks, Andy <UserControl x:Class="WpfApplication1.UserControl1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Height="300" Width="300" Background="LightBlue"> <Grid> </Grid> </UserControl> <Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:WpfApplication1="clr-namespace:WpfApplication1" Title="Window1" > <Grid> <WpfApplication1:UserControl1> </WpfApplication1:UserControl1> </Grid> </Window>

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• Populating array of input fields as alternate fields using jQuery UI datepicker

  - by Micor

  I am using jquery ui datepicker in order to populate start and end dates for multiple events on the same page, the number of events is dynamic and I need to post day, month and year as separate fields, so I have something like this: <input type="text" name="event[0].startDate" class="date"/> <input type="hidden" name="event[0].startDate_day" class="startDate_day" /> <input type="hidden" name="event[0].startDate_month" class="startDate_month" /> <input type="hidden" name="event[0].startDate_year" class="startDate_year" /> <input type="text" name="event[0].endDate" class="date"/> <input type="hidden" name="event[0].endDate_day" class="endDate_day" /> <input type="hidden" name="event[0].endDate_month" class="endDate_month" /> <input type="hidden" name="event[0].endDate_year" class="startDate_year" /> event[1]... event[2]... I started working on jQuery functionality and this is what I have so far, which will populate alternate fields for startDate by class, of course it will not do what I need because I need to populate by field name rather then class: $(".date").datepicker({ onClose: function(dateText,picker) { $('.startDate_month').val( dateText.split(/\//)[0] ); $('.startDate_day').val( dateText.split(/\//)[1] ); $('.startDate_year').val( dateText.split(/\//)[2] ); }}); I need help figuring out how can I get the name of the input field within datepicker function so the alternate field assignment done by that field name + _day, month, year so this function can work for all the events on the page, making function above look more like: $(".date").datepicker({ onClose: function(dateText,picker) { $('input[' + $name + '_month' + ']').val( dateText.split(/\//)[0] ); $('input[' + $name + '_day' + ']').val( dateText.split(/\//)[1] ); $('input[' + $name + '_year' + ']').val( dateText.split(/\//)[2] ); }}); Hope that makes sense :) Thanks

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• Excel export displaying '#####...'

  - by Cypher

  I'm trying to export an Excel database into .txt (Tab Delimited), but some of my cells are quite large. When I export into a txt some of the cells are exported as '#######....' which is surprisingly useless. Has this happened to anyone else? Do you know an easy fix? Data from one cell of my column: Accounting, African Studies, Agricultural/Bioresource Engineering, Agricultural Economics, Agricultural Science, Anatomy/Cell Biology, Animal Biology, Animal Science, Anthropology, Applied Zoology, Architecture, Art History, Atmospheric/Oceanic Science, Biochemistry, Biology, Botanical Sciences, Canadian Studies, Chemical Engineering, Chemistry/Bio-Organic/Environmental/Materials,ChurchMusicPerformance, Civil Engineering/Applied Mechanics, Classics, Composition, Computer Engineering,ComputerScience, ContemporaryGerman Studies, Dietetics, Early Music Performance, Earth/Planetary Sciences, East Asian Studies, Economics, Electrical Engineering, English Literature/ Drama/Theatre/Cultural Studies, Entrepreneurship, Environment, Environmental Biology, Finance, Food Science, Foundations of Computing, French Language/Linguistics/Literature/Translation, Geography, Geography/ Urban Systems, German, German Language/Literature/Culture, Hispanic Languages/Literature/Culture,History,Humanistic Studies, Industrial Relations, Information Systems, International Business, International Development Studies, Italian Studies/Medieval/Renaissance, Jazz Performance, Jewish Studies, Keyboard Studies, Kindergarten/Elementary Education, Kindergarten/Elementary Education/Jewish Studies,Kinesiology, Labor/Management Relations, Latin American/Caribbean Studies, Linguistics, Literature/Translation, Management Science, Marketing, Materials Engineering,Mathematics,Mathematics/Statistics,Mechanical Engineering, Microbiology, Microbiology/Immunology, Middle Eastern Studies, Mining Engineering, Music, Music Education, MusicHistory,Music Technology,Music Theory,North American Studies, Nutrition,OperationsManagement,OrganizationalBehavior/Human Resources Management, Performing Arts, Philosophy, Physical Education, Physics, Physiology, Plant Sciences, Political Science, Psychology, Quebec Studies, Religious Studies/Scriptures/Interpretations/World Religions,ResourceConservation,Russian, Science for Teachers,Secondary Education, Secondary Education/Music, Secondary Education/Science, SocialWork, Sociology, Software Engineering, Soil Science, Strategic Management, Teaching of French/English as a Second Language, Theology, Wildlife Biology, Wildlife Resources, Women’s Studies.

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• getting base url of web site's root (absolute/relative url)

  - by uzay95

  I want to completely understand how to use relative and absolute url address in static and dynamic files. ~ : / : .. : in a relative URL indicates the parent directory . : refers to the current directory / : always replaces the entire pathname of the base URL // : always replaces everything from the hostname onwards This example is easy when you are working without virtual directory. But i am working on virtual directory. Relative URI Absolute URI about.html http://WebReference.com/html/about.html tutorial1/ http://WebReference.com/html/tutorial1/ tutorial1/2.html http://WebReference.com/html/tutorial1/2.html / http://WebReference.com/ //www.internet.com/ http://www.internet.com/ /experts/ http://WebReference.com/experts/ ../ http://WebReference.com/ ../experts/ http://WebReference.com/experts/ ../../../ http://WebReference.com/ ./ http://WebReference.com/html/ ./about.html http://WebReference.com/html/about.html I want to simulate a site below, like my project which is working on virtual directory. These are my aspx and ascx folder http://hostAddress:port/virtualDirectory/MainSite/ASPX/default.aspx http://hostAddress:port/virtualDirectory/MainSite/ASCX/UserCtrl/login.ascx http://hostAddress:port/virtualDirectory/AdminSite/ASPX/ASCX/default.aspx These are my JS Files(which will be use both with the aspx and ascx files): http://hostAddress:port/virtualDirectory/MainSite/JavascriptFolder/jsFile.js http://hostAddress:port/virtualDirectory/AdminSite/JavascriptFolder/jsFile.js this is my static web page address(I want to show some pictures and run inside some js functions): http://hostAddress:port/virtualDirectory/HTMLFiles/page.html this is my image folder http://hostAddress:port/virtualDirectory/Images/PNG/arrow.png http://hostAddress:port/virtualDirectory/Images/GIF/arrow.png if i want to write and image file's link in my ASPX file i should write aspxImgCtrl.ImageUrl = Server.MapPath("~")+"/Images/GIF/arrow.png"; But if i want to write the path hard coded or from javascript file, what kind of url address it should be?

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• Changes in resolving .resx in Visual Studio 2010?

  - by MADMap

  Hi, I'm working on a quite simple Webpage (MVC2), using localisation based on ResourceFiles. I have the MVC2 Project and the Resources in a seperate Assembly. The Resources contains 3 languages (Resource.resx, Resource.de.resx, Resource.en.resx, Resource.ja.resx) and I'm querying them via the ResourceManager. Call from the .aspx <% Resources.Res resman = new Resources.Res(); %> <%=resman.GetString("String1", new System.Globalization.CultureInfo("en")) %><br /> <%=resman.GetString("String1", new System.Globalization.CultureInfo("ja")) %><br /> <%=resman.GetString("String1", new System.Globalization.CultureInfo("de")) %><br /> ResourceManager: public class Res { private readonly ResourceManager Manager = Resources.Resource1.ResourceManager; public string GetString(string id, CultureInfo info) { return Manager.GetString(id, info); } } And for the compiled Version in VS2008 I get smth like this: String1EN String1JA String1DE Compiled in Visual Studio 2008, this works fine: but I'm having Troubles if I compile the Solution in Visual Studio 2010 (also 3.5 as TargetFramework). There the result shows smth like: String1DEFAULT String1JA String1DEFAULT I don't know what it can be: is this still a bug from the VS2010 RC or am I doing smth. wrong here?

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• Separating Javascript and Html, when dynamically adding html via javascript

  - by optician

  I am currently building a very dynamic table for a list application, which will basically perform basic CRUD functions via AJAX. What I would like to do is separate the visual design and javascript to the point where I can change the design side without touching the JS side. This would only work where the design stays roughly the same(i would like to use it for rapid protyping) Here is an example. <table> <tr><td>record-123</td><td>I am line 123</td><td>delete row</td></tr> <tr><td>record-124</td><td>I am line 124</td><td>delete row</td></tr> <tr><td>record-125</td><td>I am line 125</td><td>delete row</td></tr> <tr><td>add new record</td></tr> </table> Now, when I add a new record, I would like to insert a new row of html, but I would rather not put this html into the javascript file. What I am considering is creating a row like this on the page, near the table. <tr style='visble:none;' id='template-row'><td>record-id</td><td>content-area</td><td>delete row</td></tr> And when I come to add the new row, I search the page for the tags with the id=template-row , and then grab it, do a string replace on it, and then put it in the right place in the page. As long as the design doesn't shift radically, and I keep the placeholder strings the same, it means designs can be quickly modified without touching the js. Can any give any advice on a methodology like this?

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• Any way to avoid creating a huge C# COM interface wrapper when only a few methods needed?

  - by Paul Accisano

  Greetings all, I’m working on a C# program that requires being able to get the index of the hot item in Windows 7 Explorer’s new ItemsView control. Fortunately, Microsoft has provided a way to do this through UI Automation, by querying custom properties of the control. Unfortunately, the System.Windows.Automation namespace inexplicably does not seem to provide a way to query custom properties! This leaves me with the undesirable position of having to completely ditch the C# Automation namespace and use only the unmanaged COM version. One way to do it would be to put all the Automation code in a separate C++/CLI module and call it from my C# application. However, I would like to avoid this option if possible, as it adds more files to my project, and I’d have to worry about 32/64-bit problems and such. The other option is to make use of the ComImport attribute to declare the relevant interfaces and do everything through COM-interop. This is what I would like to do. However, the relevant interfaces, such as IUIAutomation and IUIAutomationElement, are FREAKING HUGE. They have hundreds of methods in total, and reference tons and tons of interfaces (which I assume I would have to also declare), almost all of which I will never ever use. I don’t think the UI Automation interfaces are declared in any Type Library either, so I can’t use TLBIMP. Is there any way I can avoid having to manually translate a bajillion method signatures into C# and instead only declare the ten or so methods I actually need? I see that C# 4.0 added a new “dynamic” type that is supposed to ease COM interop; is that at all relevant to my problem? Thanks

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• What is the recommended coding style for PowerShell?

  - by stej

  Is there any recommended coding style how to write PowerShell scripts? It's not about how to structure the code (how many functions, if to use module, ...). It's about 'how to write the code so that it is readable'. In programming languages there are some recommended coding styles (what to indent, how to indent - spaces/tabs, where to make new line, where to put braces,...), but I haven't seen any suggestion for PowerShell. What I'm interested particularly in: How to write parameters function New-XYZItem ( [string] $ItemName , [scriptblock] $definition ) { ... (I see that it's more like 'V1' syntax) or function New-PSClass { param([string] $ClassName ,[scriptblock] $definition )... or (why to add empty attribute?) function New-PSClass { param([Parameter()][string] $ClassName ,[Parameter()][scriptblock] $definition )... or (other formatting I saw maybe in Jaykul's code) function New-PSClass { param( [Parameter()] [string] $ClassName , [Parameter()] [scriptblock] $definition )... or ..? How to write complex pipeline Get-SomeData -param1 abc -param2 xyz | % { $temp1 = $_ 1..100 | % { Process-somehow $temp1 $_ } } | % { Process-Again $_ } | Sort-Object -desc or (name of cmdlet on new line) Get-SomeData -param1 abc -param2 xyz | % { $temp1 = $_ 1..100 | % { Process-somehow $temp1 $_ } } | % { Process-Again $_ } | Sort-Object -desc | and what if there are -begin -process -end params? how to make it the most readable? Get-SomeData -param1 abc -param2 xyz | % -begin { init } -process { Process-somehow2 ... } -end { Process-somehow3 ... } | % -begin { } .... or Get-SomeData -param1 abc -param2 xyz | % ` -begin { init } ` -process { Process-somehow2 ... } ` -end { Process-somehow3 ... } | % -begin { } .... the indentitation is important here and what element is put on new line as well. I have covered only questions that come on my mind very frequently. There are some others, but I'd like to keep this SO question 'short'. Any other suggestions are welcome.

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• Good grammar for date data type for recursive descent parser LL(1)

  - by Totophil

  I'm building a custom expression parser and evaluator for production enviroment to provide a limited DSL to the users. The parser itself as the DSL, need to be simple. The parser is going to be built in an exotic language that doesn't support dynamic expression parsing nor has any parser generator tools available. My decision is to go for recursive descent approach with LL(1) grammar, so that even programmers with no previous experience in evaluating expression could quickly learn how the code works. It has to handle mixed expressions made up of several data types: decimals, percentages, strings and dates. And dates in the format of dd/mm/yyyy are easy to confuse with a string of devision ops. Is where a good solution to this problem? My own solution that is aimed at keeping the parser simple involves prefixing dates with a special symbol, let's say apostrophe: <date> ::= <apostr><digit><digit>/<digit><digit>/<digit><digit><digit><digit> <apostr> ::= ' <digit> ::= '0'..'9'

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• Hidden features of Perl?

  - by Adam Bellaire

  What are some really useful but esoteric language features in Perl that you've actually been able to employ to do useful work? Guidelines: Try to limit answers to the Perl core and not CPAN Please give an example and a short description Hidden Features also found in other languages' Hidden Features: (These are all from Corion's answer) C# Duff's Device Portability and Standardness Quotes for whitespace delimited lists and strings Aliasable namespaces Java Static Initalizers JavaScript Functions are First Class citizens Block scope and closure Calling methods and accessors indirectly through a variable Ruby Defining methods through code PHP Pervasive online documentation Magic methods Symbolic references Python One line value swapping Ability to replace even core functions with your own functionality Other Hidden Features: Operators: The bool quasi-operator The flip-flop operator Also used for list construction The ++ and unary - operators work on strings The repetition operator The spaceship operator The || operator (and // operator) to select from a set of choices The diamond operator Special cases of the m// operator The tilde-tilde "operator" Quoting constructs: The qw operator Letters can be used as quote delimiters in q{}-like constructs Quoting mechanisms Syntax and Names: There can be a space after a sigil You can give subs numeric names with symbolic references Legal trailing commas Grouped Integer Literals hash slices Populating keys of a hash from an array Modules, Pragmas, and command-line options: use strict and use warnings Taint checking Esoteric use of -n and -p CPAN overload::constant IO::Handle module Safe compartments Attributes Variables: Autovivification The $[ variable tie Dynamic Scoping Variable swapping with a single statement Loops and flow control: Magic goto for on a single variable continue clause Desperation mode Regular expressions: The \G anchor (?{}) and '(??{})` in regexes Other features: The debugger Special code blocks such as BEGIN, CHECK, and END The DATA block New Block Operations Source Filters Signal Hooks map (twice) Wrapping built-in functions The eof function The dbmopen function Turning warnings into errors Other tricks, and meta-answers: cat files, decompressing gzips if needed Perl Tips See Also: Hidden features of C Hidden features of C# Hidden features of C++ Hidden features of Java Hidden features of JavaScript Hidden features of Ruby Hidden features of PHP Hidden features of Python

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• Displaying single-instance business object data on SSRS

  - by Lachlan

  I have a SQL Server Reporting Services local (i.e. RDLC) report displayed in a ReportViewer, with two subreports. I am using business objects to populate the datasets. What is the best way to populate single-instance data on my report, e.g. a dynamic title, or a text box that lists a calculated value, not based on the report data? I am currently displaying data using the following style: public class MyRecordList { string Name { get; set; } List<MyRecord> Records { get; set;} } public MyRecord { string Description { get; set;} string Value { get; set;} } I set the datasource to the Records in an instance of MyRecordsList, and they print out find in a table. But adding a textbox and and referring to Name displays nothing. I also tried turning Name into a List, and referring to the first in the list, using: =First(Fields!Name.Value, "Report1_MyRecordList") but still nothing is printed on the report.

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• JAVA Regular Expression Errors

  - by Berkay

  I'm working on a simply password strength checker and i can not success applying regular expressions. In different resources different kinds of regular expressions are defined. i also find javascript regular expressions but had some problems to adapt. First, these are the regular expressions i need for JAVA: at least one lower case letter at least one upper case letter at least one number at least three numbers at least one special character at least two special characters both letters and numbers both upper and lower case letters, numbers, and special characters My goal is not being a regular expression expert i just want to use the parts i need.If you direct me good tutorials which discusses above for java, will be appreciated. Second, in this link some of them are mentioned but i'm getting problems to apply them. here does not catch the lower case letter (my pass: A5677a) if (passwd.matches("(?=.*[a-z])")) // [verified] at least one lower case letter {Score = Score+5;} Also here i'm getting error : illegal escape character. if (passwd.matches("(?=.*\d)")) // [verified] at least one number Finally, are these expressions all different in different kind of programming or script languages?

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• Why is setting HTML5's CanvasPixelArray values ridiculously slow and how can I do it faster?

  - by Nixuz

  I am trying to do some dynamic visual effects using the HTML 5 canvas' pixel manipulation, but I am running into a problem where setting pixels in the CanvasPixelArray is ridiculously slow. For example if I have code like: imageData = ctx.getImageData(0, 0, 500, 500); for (var i = 0; i < imageData.length; i += 4){ imageData.data[i] = buffer[i]; imageData.data[i + 1] = buffer[i + 1]; imageData.data[i + 2] = buffer[i + 2]; } ctx.putImageData(imageData, 0, 0); Profiling with Chrome reveals, it runs 44% slower than the following code where CanvasPixelArray is not used. tempArray = new Array(500 * 500 * 4); imageData = ctx.getImageData(0, 0, 500, 500); for (var i = 0; i < imageData.length; i += 4){ tempArray[i] = buffer[i]; tempArray[i + 1] = buffer[i + 1]; tempArray[i + 2] = buffer[i + 2]; } ctx.putImageData(imageData, 0, 0); My guess is that the reason for this slowdown is due to the conversion between the Javascript doubles and the internal unsigned 8bit integers, used by the CanvasPixelArray. Is this guess correct? Is there anyway to reduce the time spent setting values in the CanvasPixelArray?

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• Run Sinatra via a Rake Task to Generate Static Files?

  - by viatropos

  I'm not sure I can put this correctly but I'll give it a shot. I want to use Sinatra to generate static html files once I am ready to deploy an application, so the resulting final website would be pure static HTML. During development, however, I want everything to be dynamic so I can use Haml and straight Ruby code to make things fast/dry/clear. I don't want to use Jekyll or some of the other static site generators out there because they don't have as much power as Sinatra. So all I basically need to be able to do is run a rake task such as: rake sinatra:generate_static_files. That would run the render commands for Haml and everything else, and the result would be written to files. My question is, how do I do that with Sinatra in a Rake task? Can I do it in a Rake task? The problem is, I don't know how to include the Sinatra::Application in the rake task... The only other way I could think of doing it is using net/http to access a URL that does all of that, but that seems like overkill. Any ideas how on to solve this?

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