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  • Treat multiple IEnumerable objects as a single IEnumerable

    - by MainMa
    Hi, My question seems to be something easy, but I can't figure it out. Let's say I have a "root" IEnumerable of objects. Each object has IEnumerable of strings. How can I obtain a single IEnumerable of those strings? A possible solution is to do: public IEnumerable<string> DoExample() { foreach (var c in rootSetOfObjects) { foreach (var n in c.childSetOfStrings) { yield return n; } } } But maybe there is a magic solution with Linq?

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  • Passing single attributes to associated factories

    - by lambdabutz
    I'm looking for a way to pass fields into the factories of associated models without having to explicitly call the factory itself. For example, lets say I have some factories like so: Factory.define :person do |person| person.name "Default Bob" person.sex "M" person.house {|p| p.association(:house)} end Factory.define :house do |house| house.color "Red" house.has_ac true house.suburb {|h| h.association(:suburb)} end Factory.define :suburb do |suburb| suburb.name "Little boxes" end This is fine and all, but if I want to use factories to create someone in a specific house in a specific suburb I have do this: sub = Factory(:suburb, :name => "Blue town") house = Factory(:house, :color => "Blue", :suburb => sub) person = Factory(:person, :name => "Bill", :house => house) While this isn't bad in this small case, my actual models sometimes have 7 or 8 associations, and when I want to create an object whose associations I only care about a single attribute, the code for this starts to get really heavy. Is there somewhat I can pass attributes to nested Factories without having to recall the Factory itself?

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  • Single dimension peak fitting

    - by bufferz
    I have a single dimensional array of floating point values (c# doubles FYI) and I need to find the "peak" of the values ... as if graphed. I can't just take the highest value, as the peak is actually a plateau that has small fluctuations. This plateau is in the middle of a bunch of noise. I'm looking find a solution that would give me the center of this plateau. An example array might look like this: 1,2,1,1,2,1,3,2,4,4,4,5,6,8,8,8,8,7,8,7,9,7,5,4,4,3,3,2,2,1,1,1,1,1,2,1,1,1,1 where the peak is somewhere in the bolded section. Any ideas?

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  • Will Multi threading increase the speed of the calculation on Single Processor

    - by Harsha
    On a single processor, Will multi-threading increse the speed of the calculation. As we all know that, multi-threading is used for Increasing the User responsiveness and achieved by sepating UI thread and calculation thread. But lets talk about only console application. Will multi-threading increases the speed of the calculation. Do we get culculation result faster when we calculate through multi-threading. what about on multi cores, will multi threading increse the speed or not. Please help me. If you have any material to learn more about threading. please post. Thanks in advance, Harsha

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  • Android-iPhone single codebase

    - by Lorenzo
    Is there a way, apart from using HTML and JavaScript on a web control, to have an (almost) single codebase for an application that should run on iOS and Android? The big issue is of course that they use a different language (Java for Android, Objective-C for iOS) for application development. It would be nice to have some sort of meta-language that will be translated in Java and in Objective-C. What about Flash? Adobe wasn't supposed to release a tool to create flash-based apps in iOS?

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  • [Single|Double|Or no] Quotes when using grep?

    - by Hamy
    Grep acts differently depending on what kind of quotes I surround the regex with. I can't seem to get a clear understanding of why this is. Here is an example of the problem: hamiltont$ grep -e show\( test.txt variable.show(); variable.show(a); variable.show(abc, 132); variableshow(); hamiltont$ grep -e "show\(" test.txt grep: Unmatched ( or \( hamiltont$ grep -e 'show\(' test.txt grep: Unmatched ( or \( I am just assuming there is some proper way to enclose the regex with single/double quotes. Any help? FWIW, grep --version returns grep (GNU grep) 2.5.1

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  • Unescpaing huge single-line string on Linux

    - by Lajos Nagy
    I ended up with a huge, single line string literal (don't ask me how) where everything is escaped (mostly), including new lines and double quotes. Problem is, I want the original string. The string is huge so I'm not even sure how to begin. Here's what I have: "This\n is \"nice\",\nain\'t it?" This is what I want: This is "nice", ain't it? Again, the problem is that other shell sensitive stuff is not escaped (like $, or !), and that the string is couple of megabytes.

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  • Single-letter prefix for PHP class constants?

    - by keithjgrant
    I've noticed many (all?) PHP constants have a single-letter prefix, like E_NOTICE, T_STRING, etc. When defining a set of class constants that work in conjunction with one another, do you prefer to follow similar practice, or do you prefer to be more verbose? class Foo { // let's say 'I' means "input" or some other relevant word const I_STRING = 'string'; const I_INTEGER = 'integer'; const I_FLOAT = 'float'; } or class Bar { const INPUT_STRING = 'string'; const INPUT_INTEGER = 'integer'; const INPUT_FLOAT = 'float'; }

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  • Deploying .NET components (upgrade the component for only a single client application)

    - by Vytas999
    I use Visual Studio .NET to create a component that will be shared by two client applications. Eventually, I plan to deploy new version of this component. However, not all of the new versions will be compatible with both client applications. When I deploy component and the client applications, I must ensure that I can upgrade the component for a single client application. I must also minimize the need for configuration changes when I deploy new version of the component. What are possible ways to achieve this goal?

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  • C# XML Serialisation Only Serialise Single Element in List

    - by guazz
    Given some sample XML such as: <XML> <EMPLOYEES> <EMPLOYEE isBestEmployee="false">John"<"/EMPLOYEE> <EMPLOYEE isBestEmployee="true">Joe"<"/EMPLOYEE> <EMPLOYEE isBestEmployee="false">Bill"<"/EMPLOYEE> </EMPLOYEES> </XML> How do I serialise just the employee with isBestEmployee="true" to a single Employee object?

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  • Extract single element from XMLHttpRequest

    - by m6a-uds
    Hi! I am actually making a Sidebar Gadget, (which is AJAX-based) and I am looking for a way to extract a single element from an AJAX Request. The only way I found yet was to do something like that: var temp = document.createElement("div"); temp.innerHTML = HttpRequest.innerText; document.body.appendChild(temp); temp.innerHTML = document.getElementByID("WantedElement").innerText; But it is pretty ugly, I would like to extract WantedElement directly from the request without adding it to the actual document... Thank you!

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  • Use one single DLL library to import other libraries at runtime

    - by Yifan
    I am writing a Win32 DLL library that can be redistributed. I am using different versions of the windows API because I want to support Windows 7 functions, but still have support for Windows 2000 (with some function disabled). What I have currently is MyLib2000.dll, MyLibXP.dll, and MyLibVista.dll, and my application chooses which library to load at runtime. I want a way to have a single DLL (MyLib.dll) that stores the other three in itself and when it's being loaded, it extracts the correct DLL out of itself and loads it. I know this is not the best way to do this, so suggestions on another method of doing this is welcome.

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  • Eclipse+Subversive- Multiple src paths in a single project each from a separate parts of a single re

    - by guinaut
    In a nutshell, I would like to have a single eclipse project with multiple src directories each managed by subversive (or subclipse). If the code base were small, I would use several projects. However, the code base is not small (50+ src paths). Does anyone know how to do this with the Subversion plugins for eclipse? All of the src paths derive from modules that in turn have a common point node in the repository. However, the modules are versioned, so I can’t checkout all of them. It looks as though Subclipse and Subversive do not support multiple src paths. Can anyone confirm this? Solutions?

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  • ASP.NET single quotes are converted to &#39;

    - by Monty
    Note: Most probably this will be a double question, but since I haven't found a clear answer, I'm asking it anyway. In ASP.NET I'd like to add some JavaScript to the onclick event of a CheckBox. I've simplified the case to this: <asp:CheckBox ID="TestCheckBox" runat="server" onclick="alert('test');" Text="Test" /> The resulting HTML is as follows: <input id="MainContainer_TestCheckBox" type="checkbox" name="ctl00$MainContainer$TestCheckBox" onclick="alert(&#39;test&#39;);" /><label for="MainContainer_TestCheckBox">Test</label> What particularly bothers me is that a single quote 'automatically' gets converted into '&#39;'. If I omit the onclick in the markup and assign it in Page_Load, the exact same results show in the HTML. protected void Page_Load(object sender, EventArgs e) { this.TestCheckBox.Attributes["onclick"] = "alert('test');"; } Anyone got a clue about what's happening? Or how to fix/ avoid it?

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  • Website using open source Forums,Wikis and CMS (Single site)

    - by Daksh
    Hi, I want to develop a site using all three FOSS i.e. Forum,wikis and CMS.But i have few doubts. 1.Can you suggest which is the best software for each of the three(Forum,wikis and CMS).? 2.How should i make the front end preferably(i.e should i use Dreamweaver or just use the CMS for the front end too) 3.How do i integrate all the three(CMS,Forum and Wiki) into a single website. 4.Should i make my own CMS? 5.Site popularity and monetary techniques which really works. Please provide detailed explanations for your answers. Thanks in advance, Cheers!

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  • Multiple Producers Single Consumer Queue

    - by Talguy
    I am new to multithreading and have designed a program that receives data from two microcontroller measuring various temperatures (Ambient and Water) and draws the data to the screen. Right now the program is singly threaded and its performance SUCKS A BIG ONE. I get basic design approaches with multithreading but not well enough to create a thread to do a task but what I don't get is how to get threads to perform seperate task and place the data into a shared data pool. I figured that I need to make a queue that has one consumer and multiple producers (would like to use std::queue). I have seen some code on the gtkmm threading docs that show a single Con/Pro queue and they would lock the queue object produce data and signal the sleeping thread that it is finished then the producer would sleep. For what I need would I need to sleep a thread, would there be data conflicts if i didn't sleep any of the threads, and would sleeping a thread cause a data signifcant data delay (I need realtime data to be drawn 30 frames a sec) How would I go about coding such a queue using the gtkmm/glibmm library.

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  • Best approach to limit users to a single node of a given content type in Drupal

    - by Chaulky
    I need to limit users to a single node of a given content type. So a user can only create one node of TypeX. I've come up with two approaches. Which would be better to use... 1) Edit the node/add/typex menu item to check the database to see if the user has already created a node of TypeX, as well as if they have permissions to create it. 2) When a user creates a node of TypeX, assign them to a different role that doesn't have permissions to create that type of node. In approach 1, I have to make an additional database call on every page load to see if they should be able to see the "Create TypeX" (node/add/typex). But in approach 2, I have to maintain two separate roles. Which approach would you use?

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  • Consolidating files in a single directory before you link them into the final executable

    - by David
    I am working on Solaris 10, Sun Studio 11. I am refactoring some old code, and trying to write unit tests for them. My make file looks like: my_model.o:my_model.cc CC -c my_model.cc -I/../../include -library=stlport4 -instances=extern unit_test: unit_test.o my_model.o symbol_dictionary.o CC -o unit_test unit_test.o my_model.o symbol_dictionary.o -I../../include \ -library=stlport4 -instances=extern unit_test.o: unit_test.cc CC -c unit_test.cc -I/../../include -library=stlport4 -instances=extern symbol_dictionary.o: cd ../../test-fixtures && ($MAKE) symbol_dictionary.o mv ../../test-fixtures/symbol_dictionary.o . In the ../../test-fixtures makefile, I have the following target: symbol_dictionary.o: CC -c symbol_dictionary.cc -I/../../include -library=stlport4 -instances=extern I do the instances=extern because I had linking problems before, and this was the recommended solution. The consequence is in each directory that is being compiled, a SunWS_Cache directory is created to store the template instances. This is the long way to get to this question. Is it a standard practice to consolidate object files in a single directory before you link them?

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  • insert VBS variable within a single-quoted WMI query

    - by jiaoziren
    Hi all, I am really frustrated by the snippet below: Dim objFSO, varSrc, varDest, varExt Set objFSO = CreateObject("Scripting.FileSystemObject") varSrc = WScript.Arguments(0) varDest = WScript.Arguments(1) varExt = WScript.Arguments(2) If objFSO.FolderExists(varSrc) Then WScript.Echo varSrc strComputer = "." Set objWMIService = GetObject("winmgmts:" _ & "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2") Set colMonitoredEvents = objWMIService.ExecNotificationQuery _ ("SELECT * FROM __InstanceCreationEvent WITHIN 10 WHERE " _ & "Targetinstance ISA 'CIM_DirectoryContainsFile' AND " _ & "TargetInstance.GroupComponent= " _ & "'Win32_Directory.Name=""c:\\\\kk ""'") Do Set objLatestEvent = colMonitoredEvents.NextEvent WScript.Echo objLatestEvent.TargetInstance.PartComponent Loop Else WScript.Echo "Bazinga" End If I tried to replace c:\\kk with varSrc however it seems impossible for WSH to recognize it in WMI query - not to mention it was within a single quote! I have tried chr(34) and it didn't work. Please help if possible. Much appreciated!

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  • CakePHP: Using two tables for a single model

    - by mwaterous
    I'm just picking up development in CakePHP right now so forgive me if this seems obvious; it did to me when I first read about has, belongsTo, hasMany, etc. The problem is I would like to associate two tables with a single model, and was wondering if there was a way to configure this so that when CakePHP did it's queries it automatically performed a join on the two tables. I don't want to create a separate model for the second table as it is merely a meta information table - the master table will contain the primary information required, the meta table will be populated with secondary information that is not required and therefore may or may not be set for every row of the master table.

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  • rails large amount of data in single insert activerecord gave out

    - by Nik
    So I have I think around 36,000 just to be safe, a number I wouldn't think was too large for a modern sql database like mysql. Each record has just two attributes. So I do: so I collected them into one single insert statement sql = "INSERT INTO tasks (attrib_a, attrib_b) VALUES (c1,d1),(c2,d2),(c3,d3)...(c36000,d36000);" ActiveRecord::Base.connection.execute sql from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract_adapter.rb:219:in `log' from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/mysql_adapter.rb:323:in `execute_without_analyzer from c:/r/projects/vendor/plugins/rails-footnotes/lib/rails-footnotes/notes/queries_note.rb:130:in `execute' from C:/Ruby/lib/ruby/1.8/benchmark.rb:308:in `realtime' from c:/r/projects/vendor/plugins/rails-footnotes/lib/rails-footnotes/notes/queries_note.rb:130:in `execute' from (irb):53 from C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/vendor/tzinfo-0.3.12/tzinfo/time_or_datetime.rb:242 I don't know if the above info is enough, please do ask for anything that I didn't provide here. So any idea what this is about? THANK YOU!!!!

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  • MySQL, join one item to multiple items in a single query

    - by bschaeffer
    Say I've got two tables. One contains a list of items, and one contains pictures of the items. Something like this: Items +----+---------+ | id | name | +----+---------+ | 1 | oranges | | 2 | apples | +----+---------+ Pictures +----+---------+ | id | item_id | +----+---------+ | 1 | 1 | | 2 | 2 | | 3 | 2 | +----+---------+ My question is this: is it possible in a single query to select item 2 from Items and join all the rows in the Pictures table whose item_id references that same id? I am sure I've tried almost everything I can think of, but nothing is coming to mind. I apologize if the answer to this is simple, but It's just escaping me right now.

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  • Architecture of a single-page JavaScript web application?

    - by fig-gnuton
    How should a complex single-page JS web application be structured on the client-side? Specifically I'm curious about how to cleanly structure the application in terms of its model objects, UI components, any controllers, and objects handling server persistence. MVC seemed like a fit at first. But with UI components nested at various depths (each with their own way of acting on/reacting to model data, and each generating events which they themselves may or may not handle directly), it doesn't seem like MVC can be cleanly applied. (But please correct me if that's not the case.) -- (This question resulted in two suggestions of using ajax, which is obviously needed for anything other than the most trivial one-page app.)

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  • removing the single quote from a list of

    - by tanky
    I need to append/format a url with a list of ids for an api call however, when i put the list at the end of the api https://api.twitter.com/1.1/users/lookup.json?user_id=%s'%a i just get an empty string as a response. i have tried turning the list into a string and removing the square brackets doing a = str(followers['ids'])[1:-1] but i still get the same problem. and im assuming that its being caused by the single quote at the start. i have tried removing the apostrophe from the string doing a.replace("'", "") and now i have run out of ideas thanks

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  • multiple rows of a single table

    - by Amanjot Singh
    i am having a table with 3 col. viz id,profile_id,plugin_id.there can be more than 1 plugins associated with a single profile now how can i fetch from the database all the plugins associated with a profile_id which comes from the session variable defined in the login page when I try to apply the query for the same it returns the data with the plugin_id of the last record the query is as follows SqlCommand cmd1 = new SqlCommand("select plugin_id from profiles_plugins where profile_id=" + Convert.ToInt32(Session["cod"]), con); SqlDataReader dr1 = cmd1.ExecuteReader(); if (dr1.HasRows) { while (dr1.Read()) { Session["edp1"] = Convert.ToInt32(dr1[0]); } } dr1.Close(); cmd1.Dispose();

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