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rvm `require': no such file to load -- rubygems (LoadError)

- by xxd

run a ruby code got error "rvm `require': no such file to load -- rubygems (LoadError)" bash-3.2$ rvm --default ruby-2.0.0-p451 -bash-3.2$ rvm list rvm rubies =* ruby-2.0.0-p451 [ x86_64 ] -bash-3.2$ gem list --local *** LOCAL GEMS *** bigdecimal (1.2.0) bundler (1.5.3) bundler-unload (1.0.2) executable-hooks (1.3.1) gem-wrappers (1.2.4) io-console (0.4.2) json (1.7.7) minitest (4.3.2) net-ssh (2.9.1) psych (2.0.0) rake (0.9.6) rdoc (4.0.0) rubygems-bundler (1.4.2) rvm (1.11.3.9) test-unit (2.0.0.0) -bash-3.2$ gem list --local rubygems *** LOCAL GEMS *** rubygems-bundler (1.4.2) to run the script: ruby test.rb `require': no such file to load -- rubygems (LoadError) $ cat test.rb require 'rubygems' require 'net/ssh' Net::SSH.start(............. what's going on? please advice. thanks

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Can't access variables from dynamically loaded javascript

- by Menno

I'm using a fairly simple system to load javascript dynamically: include = function (url) { var e = document.createElement("script"); e.src = url; e.type="text/javascript"; document.getElementsByTagName("head")[0].appendChild(e); }; Let's say I have a file test.js which has the following contents: var foo = 4; Now, in my original script, I want to use include(test.js); console.log(foo); However, I get a 'foo has not been defined' error on this. I'm guessing it has to do with the dynamic script being included as the last child of the <head> tag. How can I get this to work?

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How to create diagrams for papers.

- by Simon

I want to create some diagrams for some papers. Diagrams will contain some text, e.g. some console output. I need images for using also in html files. There is TikZ so can create images like this: http://www.texample.net/tikz/examples/boxes-with-text-and-math/ http://www.texample.net/tikz/examples/rule-based-diagram/ http://www.texample.net/tikz/examples/scenario-tree/ but as a result I get some ps/pdf files, not images. What's more I want to generate the pictures from text files as I want to track changes in some VCS, any binary files are not suitable for that.

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jquery ajax call errors in chrome onenter with no responseText

- by wham12

I've built a login page that uses a .ajax call to a generic c# handler (.ashx) to validate the username and password before allowing the user to log in. If you click on the login link <a href="#" class="ui-state-default ui-corner-all CustomButton" onclick="goLogin();return false"> the .ajax call returns successfully and it logs the user in. I am trying to make it so the user can also just press the "enter" key from the password box: $("#pword").keydown(function(e) { if (e.keyCode == 13) { goLogin(); } }); Using Firefox, both ways work just fine and the user is logged in. With Chrome however, pressing "enter" hits the error function of my .ajax call and will not log the user in. The parameters and responses look identical through Firefox's console, as expected. What would be causing this and/or how can I debug it in Chrome?

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Can Spring access-denied-handler refer to popup?

- by Rens Groenveld

I am working with Spring Security 3.1.x and have implemented method annotation securities. As I want, when I perform a certain action while being logged in as a used that doesn't have the rights, I get a 403 acces is denied in my console! Perfect! Now I would like to catch this 403, and give the user a popup with a custom message. I don't want to redirect users to a page saying that they have no rights. Is there any way the access-denied-handler of Spring can take care of a popup? Or can it only redirect to another page? Maybe there are other options for me? Thanks in advance!

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How to control utf-8 string paddings

- by Kev

I got three UTF-8 stings: hello, world hello, ?? hello, ?rld I only want the first 10 chars so that the bracket in one column: [hello, wor] [hello, ? ] [hello, ?r] In console: width('??')==width('worl') width('? ')==width('wor') #a white space behind '?' python's format() doesn't help when UTF-8 chars mixed in >>> for s in ['[{0:<{1}.{1}}]'.format(s, 10) for s in ['hello, world', 'hello, ??', 'hello, ?rld']]: ... print(s) ... [hello, wor] [hello, ?? ] [hello, ?rl] So, I wonder if there is a standard way to do the UTF-8 padding staff?

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jQuery Running a function in a context and adding to a variable

- by Mark

For this question I'm going to give a simplified example of what I want to do, and the function I want to learn to write. var collection = ''; <div id='container'> <span>1</span> <span>2</span> <span>3</span> </div> What I want to do this, for every span in the div, take its text, add it to the collection. So ideally it would look like: $('#container').addtoCollection(collection); The method would be something like: $(this).find('span').each(function () { collection = collection + $(this).text(); }). Where the first this would equal #container. So in the end you can do: console.log(collection); and get: 123 How do I write the function that does this? Thanks!

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Windows Phone 7 Application + WCF + SSL + Username Authentication

- by s7orm

Hello, I have developed a test service with WCF, which I try to consume from a Windows Phone 7 Application, however when calling a method from the service I get a weird exception: There was no endpoint listening at https://server/Service.svc that could accept the message. This is often caused by an incorrect address or SOAP action. The WCF service uses a custom binding with UserNameOverTransport authentication and SSL. For the authorization I am using an implementation of the UserNamePasswordValidator. If I try to consume the service from a console or silverlight application (cross domain policy is enabled) - it works fine (authorization as well). And the most weird thing is that the ServiceReferences.ClientConfig file generated for the WP7 App is exactly the same as the config file generated for the silverlight application. I have no idea what is wrong with my service...

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Reflection: How to get the underlying type of a by-ref type

- by Qwertie

I was surprised to learn that "ref" and "out" parameters are not marked by a special attribute, despite the existence of ParameterInfo.IsOut, ParameterInfo.IsIn (both of which are always false as far as I can see), ParameterAttributes.In and ParameterAttributes.Out. Instead, "ref" parameters are actually represented by a special kind of "Type" object and "out" parameters are just ref parameters with an additional attribute (what kind of attribute I don't yet know). Anyway, to make a by-ref argument you call Type.MakeByRefType(), but my question is, if you already have a by-ref type, how do you get back to the original Type? Hint: it's not UnderlyingSystemType: Type t = typeof(int); Console.WriteLine(t.MakeByRefType().UnderlyingSystemType==t); // FALSE

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C++ coverage tool that WORKS?!

- by Poni

Been searching for a good coverage tool for a while now. I'm with VC++ 2008. Tried already: NCover, PureCoverage, PartCover and a few others I can't remember their names. None works! Not even with a very basic console application that does almost nothing. Tried to get an evaluation copy from BullsEye and few more others - not only that they require you to ask for it (no automatic process), they don't even answer after you request AND after you ask what's going on, through the support mail. So the question is: Is there any tool, which I can immediately download an evaluation for it, that actually works on VC 2008 projects? Something that will get me going within 10 minutes? It's funny but it seems to be a very non-trivial request in the area of this kind of software.

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Which Namespaces Must Be Used to Connect to SQL Server with ADO.NET?

- by every_answer_gets_a_point

i am using this example to connect c# to sql server. can you please tell me what i have to include in order to be able to use sqlconnection? it must be something like: using Sqlconnection; ??? string connectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=""C:\SQL Server 2000 Sample Databases\NORTHWND.MDF"";Integrated Security=True;Connect Timeout=30;User Instance=True"; SqlConnection sqlCon = new SqlConnection(connectionString); sqlCon.Open(); string commandString = "SELECT * FROM Customers"; SqlCommand sqlCmd = new SqlCommand(commandString, sqlCon); SqlDataReader dataReader = sqlCmd.ExecuteReader(); while (dataReader.Read()) { Console.WriteLine(String.Format("{0} {1}", dataReader["CompanyName"], dataReader["ContactName"])); } dataReader.Close(); sqlCon.Close();

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How to use all the cores in Windows 7?

- by Anon

I am not sure if this belongs to Stackoverflow or Superuser but I thought I would ask here. I have a console based application written in C which currently takes about an hour to terminate in Windows 7 64-bit OS. The task manager reports that the application is using only 25% of the available CPU. I would like to reduce the run time by increasing cpu usage. Is there any way to let the application use all four cores (the laptop has Core i5) instead of just one? I am assuming that task manager reports 25% because only one core is allocated to the program.

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Getting percentages.

- by user287798

Hi, i have got a standing answer in this thread. http://stackoverflow.com/questions/2396203/get-the-count-of-elements-where-candidate-has-won But i am failing to get the percentage, what am i doing wrong. I have the code below. var s4 = from can in allCandidates let noDists= ((from d in root.Elements("Provinces") select d.Attribute("Province").Value).Distinct()).Count() let count = (from winner in (from p in root.Descendants("Province_Data") let maxVotes = (from c in p.Elements("Candidate") select c) .Max(x => ((int)x.Element("votes"))) select (from c in p.Elements("Candidate") select c).Where(x => ((int)x.Element("votes")) == maxVotes) .First().Element("name").Value ) where winner == can select winner).Count() orderby count descending select new { Candidate = can, NumberOfProvincesWon = count,Percentage= (count/noDists)*100}; foreach (var d in s4) Console.WriteLine(" {0}", d.ToString());

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XMLHttpRequest progressive download?

- by StackedCrooked

Just for fun I was creating a JavaScript console for controlling my PC. It involves a small webserver that takes command strings and forwards those to the system using popen calls (to be more specific popen4 on a Ruby mongrel server). The stdout channels are redirected to the http response. The problem is that the response only arrives once the entire contents of stdout has been sent. This is ok for small commands, but not for a command like find / which lists all the files in the system. In such situations it would be nice to have the results shown progressively in the webview (just like in the regular terminal). I thought that using XMLHttpRequest synchronously might result in progressive downloading, but it doesn't seem so. Is there any way to make it work?

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Why do values in the row I insert not match the values in the insert query?

- by user202411

I just can't understand why is my database (mysql) behaving like this! My console shows that the record is created properly (please, notice the "remote_id" value): Tweet Create (0.3ms) INSERT INTO `tweets` (`remote_id`, `text`, `user_id`, `twitter_account_id`) VALUES (12325438258, 'jamaica', 1, 1) But when I check the record, it shows that the remote_id is 2147483647 intead of the provided value (12325438258 in the example above)... This table has many entries, but this field is always written with 2147483647... It was supposed to fill this space with an unique id (which I guarantee you is being generated properly).

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Javascript function returning number with two decimals...?

- by muzzledBYbrass

I have a function to return points along a line and my return comes back with two decimal points...? For example, a return of my variable px will be something like -88.4029.032940598. vx is the x vector and mult is the distance of the line plus distance to calculate the point. Here is the operation that is returning these values: var mult = parseFloat(mag + theUnit); var px = coord_one.x_point + (vx * mult); console.log(px); Never have seen this before- I appreciate any and all help!

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Export Certificate Windows Server 2008

- by user1432032

I need to export the private key of a self-created SSL-certificate on a Windows Server 2008. However at Microsoft Management Console (the certificate is located, if it matter, in Personal-Certificate folder) the option "Yes, export the private key" is greyed out. Reading the provided help section it tells that the certificate needed to "be made exportable" during creation. However it also says that it is ONLY a limitation if it was created using Windows Server 2003. It doesn´t say anything how to fix it though on a Windows 2008 Server. The certificate is self-signed. I want to export to PKCS12 format. I´m accessing MMC as administrator so there should not be any permission issues. How can I make this certificate "exportable"?

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find a specific string pattern in an array jquery

- by Bwyss

Apologies if this is a duplicate, but I can't seem to find the solution. I am trying to find a specific string pattern in an array. I want to find all values in data that contain 'underscore r underscore'. I then want to create a new array that contains only those keys and values. var data = ["something", "bar_r_something"]; var resultArray = new Array(); for (var i = 0; i < data.length; i++) { var bar = /_r_/; if ($.inArray(bar, data[i].length) > 0) { console.log("found _r_"); resultArray.push(data[i]); } }; I just can't seem to get that $.inArray to work, it seems to always kick out -1.

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Leaving SQL Management open on the internet

- by Tim Fraud

I am a developer, but every so often need access to our production database -- yeah, poor practice, but anyway... My boss doesn't want me directly on the box using RDP, and so we decided to just permit MS SQL Management Console access so that I can do my tasks. So right now we have the SQL box somewhat accessible on the internet (on port 1433 if I am not mistaken), which opens a security hole. But I am wondering, how much of an uncommon practice is this, and what defaults should I be concerned about? We use MSSQL2008 and I created an account that has Read-Only access, because my production tasks only need that. I didn't see any unusual default accounts with default passwords on the system, so I would be interested to hear your take. (And of-course, is there a better way?)

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how to get id of the saved record in rails

- by railsnew

I am doing this from the console but i'd like to do this in my code too. Basically I am trying to add a record to the table and then get the id back. >> @record = Physician.create(:pname => "someone2") => #<Physician id: nil, pname: "someone2", pgroup: nil, created_at: nil, updated_at: nil, userid: nil, storeid: nil, licexpdate: nil, address: nil> >> @record.save => false >>

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Windows equivalent of inb(), outb(), low level i/o

- by Sebastian Dwornik

I have some Linux code that monitors our hardware by collecting temperatures, voltages, and fan speeds, from the motherboard using inb(), outb(), inl(), etc. low level i/o functions. My challenge is to port that code over to run under Windows as a simple console app. But am puzzled in what functions Win32 (or .NET) provide that allow me permission to access direct memory mapped ports. I don't want to code a system driver either. My Windows tool preference is VS2008. (fyi) Is this possible?

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Linq to xml : can't load all elements

- by aleo

hello i'm trying to load some elements from a xml file. but it XDocument.Load seems not treating xml file properly in this case, the method returns the content of the xml file as one node. here is my xml content: <processes> <process>winamp</process> <process>Acrobat</process> <process>WinRAR</process> </processes> and the code that reads the file: XDocument loaded = XDocument.Load("/process_list.xml"); var x = from a in loaded.Descendants("processes") select a.Element("process"); foreach (var t in x) { Console.WritleLine(t.Value.ToString()); } thank you

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Rscript does not recognize setGeneric function

- by Branko K.

I am trying to convert an R script into something that a client can run in batch mode. My code uses generic functions and one snippet which is near the beginning goes like: setGeneric("testInput", function(inputData, params = list()) standardGeneric("testInput")) I've been using R CMD BATCH and it works fine. However I couldn't find an easy way to make my script print the output on the console, so based on that (and suggestion that Rscript.exe is the "proper" way to run R batch files) I decided to switch to Rscript. However when running the very same .R file with Rscript I get the following: Error: could not find function "setGeneric" Execution halted I know there is probably a trivial reason behind this but I just cannot figure it out. Can someone please point me to where the mistake is? Thanks so much in advance. Cheers!

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size of structures in .NET

- by redpaladin

My problem is very simple. My problem is to send a structure between a program in C to a C# program. I made a struct in C#: public struct NetPoint { public float lat; // 4 bytes public float lon; // 4 bytes public int alt; // 4 bytes public long time; // 8 bytes } Total size of the struct must be 20 bytes. When I do a sizeof() of this struct: System.Diagnostics.Debug.WriteLine("SizeOf(NetPoint)=" + System.Runtime.InteropServices.Marshal.SizeOf(new NetPoint())); The debug console shows: SizeOf(NetPoint)=24 But I expected to have 20 bytes. Why do I see a difference?

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problme with javascript map/object

- by akshay

I am using javascript map to store keys and values.Later on I check if specified key is present in map or not, but it sometimes gives correct result but sometimes it dont.I tried to print the map using console.log(mapname), it shows all keys, but i i try to check if some specified key is presnt sometimes it gives wrong answer. Am using following code: //following code is called n times in loop with different/same vales of x myMap : new Object(); var key = x ; //populated dynamically actually myMap[key] ="dummyval"; if(myIdMap[document.getElementById("abc").value.trim()]!=null) alert('present' ); else alert('not present'); What can be the possible problem?

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