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• Can I create a collection in Scala that uses different equals/hashCode/compare implementations?

  - by Willis Blackburn

  I'm looking for as simple way to create an identity set. I just want to be able to keep track of whether or not I've "seen" a particular object while traversing a graph. I can't use a regular Set because Set uses "==" (the equals method in Scala) to compare elements. What I want is a Set that uses "eq." Is there any way to create a Set in Scala that uses some application-specified method for testing equality rather than calling equals on the set elements? I looked for some kind of "wrapEquals" method that I could override but did not find it. I know that I could use Java's IdentityHashMap, but I'm looking for something more general-purpose. Another idea I had was to just wrap each set element in another object that implements equals in terms of eq, but it's wasteful to generate tons of new objects just to get a new equals implementation. Thanks!

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• R: ca plotting text attributes

  - by chasec

  Does anyone know of a way to control the font size/color/weight of the row and column names when plotting a correspondence plot with the ca package? The following code will produce a very nice looking chart, though if there were more attributes (very heavy, super heavy, something more than super heavy) or more classes of workers (peons, underlings, etc) then the graph will get a little cluttered and hard to tell what was what. It would be nice if you could list all the attributes in a separate color than the categories of workers. library(ca) data("smoke") plot(ca(smoke) , map = "symmetric" , what =c("active","active") , mass = c(T,T) , contrib = "absolute" , col = c("red","blue") , pch = c(15,17,15,17) , labels = c(2,2) , arrows = c(T,F) ) Alternatively, does anyone know if there is a way to reproduce something along these lines with ggplot2? I didn't find anything on the website that seemed comparable, but I don't know much about the package. Thanks, -Chase

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• How can i automatically move files based on their name?

  - by Pasha

  I have 13 folders containing scanned photographs. Some photographs have been renamed to the date on which they were taken, resulting in YYYY.MM.DD.tif name. It could potentially be YYYY.MM.DD (###).tif where ### is just a number. Others are just named IMG_###.tif I would like to move the files with the YYYY.MM.DD name to a YYYY\MM\DD folder structure. While the files are being moved, I would also like to append the original folder name to the end of the file name. So, a file 01\2012.06.26 (1).tif should end up 2012\06\26\2012.06.26 (1) - 01.tif Is there a Windows tool that can help me with this? Or do I need to resort to writing a custom app?

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• Do you have suggestions for these assembly mnemonics?

  - by Noctis Skytower

  Greetings! Last semester in college, my teacher in the Computer Languages class taught us the esoteric language named Whitespace. In the interest of learning the language better with a very busy schedule (midterms), I wrote an interpreter and assembler in Python. An assembly language was designed to facilitate writing programs easily, and a sample program was written with the given assembly mnemonics. Now that it is summer, a new project has begun with the objective being to rewrite the interpreter and assembler for Whitespace 0.3, with further developments coming afterwards. Since there is so much extra time than before to work on its design, you are presented here with an outline that provides a revised set of mnemonics for the assembly language. This post is marked as a wiki for their discussion. Have you ever had any experience with assembly languages in the past? Were there some instructions that you thought should have been renamed to something different? Did you find yourself thinking outside the box and with a different paradigm than in which the mnemonics were named? If you can answer yes to any of those questions, you are most welcome here. Subjective answers are appreciated! Stack Manipulation (IMP: [Space]) Stack manipulation is one of the more common operations, hence the shortness of the IMP [Space]. There are four stack instructions. hold N Push the number onto the stack copy Duplicate the top item on the stack copy N Copy the nth item on the stack (given by the argument) onto the top of the stack swap Swap the top two items on the stack drop Discard the top item on the stack drop N Slide n items off the stack, keeping the top item Arithmetic (IMP: [Tab][Space]) Arithmetic commands operate on the top two items on the stack, and replace them with the result of the operation. The first item pushed is considered to be left of the operator. add Addition sub Subtraction mul Multiplication div Integer Division mod Modulo Heap Access (IMP: [Tab][Tab]) Heap access commands look at the stack to find the address of items to be stored or retrieved. To store an item, push the address then the value and run the store command. To retrieve an item, push the address and run the retrieve command, which will place the value stored in the location at the top of the stack. save Store load Retrieve Flow Control (IMP: [LF]) Flow control operations are also common. Subroutines are marked by labels, as well as the targets of conditional and unconditional jumps, by which loops can be implemented. Programs must be ended by means of [LF][LF][LF] so that the interpreter can exit cleanly. L: Mark a location in the program call L Call a subroutine goto L Jump unconditionally to a label if=0 L Jump to a label if the top of the stack is zero if<0 L Jump to a label if the top of the stack is negative return End a subroutine and transfer control back to the caller halt End the program I/O (IMP: [Tab][LF]) Finally, we need to be able to interact with the user. There are IO instructions for reading and writing numbers and individual characters. With these, string manipulation routines can be written. The read instructions take the heap address in which to store the result from the top of the stack. print chr Output the character at the top of the stack print int Output the number at the top of the stack input chr Read a character and place it in the location given by the top of the stack input int Read a number and place it in the location given by the top of the stack Question: How would you redesign, rewrite, or rename the previous mnemonics and for what reasons?

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• Reporting Services 2008 & 2012 side by side

  - by Iulian Ilies

  I have installed Sql Server 2008 & 2012 side by side on the same machine, and that's includes the reporting service for each. Both are instances are named instances: MSSQLSERVER2008 and MSSQLSERVER2012. I didn't configure the 2008 one but configured 2012 first and this one is working fine. However later on when I wanted to configure the 2008 reporting service instance I was not able to do so; it simply cannot find it. Both services are displayed as running, nevertheless while being in Reporting Services Configuration Manager only the 2012 instance is displayed. I tried stopping the 2012 but still no luck, 2008 won't show up in the RS configuration manager. Any suggestions? Thanks in advance Iulian

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• Tidying up old apache logs managed by vlogger

  - by Andre Lackmann

  We're using vlogger to manage our apache logs which keeps everything nice and neat but pretty much breaks the ability to use logrotate from as far as I can see. eg. our virtual access.logs each sit within their own dir and are named similar to: /virtual.com/ 20100501-access.log 20100502-access.log 20100503-access.log 20100504-access.log etc.. Has anyone created a cleanup script to go through the /var/log/httpd/ sub dirs and remove old logs? We like using vlogger, but cleaning up olds logs after it is a pain!

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• Can a webite have too many bindings?

  - by justSteve

  IIS7.x on a win08 web version on a dedicated server. I have a site that's serving a few dozen affiliates - many of which are hitting me via a subdomain from their own root domain - all of which have a subdomain specific to their account. E.G. my affiliate named 'Acme' hits my site via: myApp.Acme.com (his root, my app) Acme.MyDomain.com (his account within my root domain) Currently I'm adding each of these as a binding entry in IIS (targeting a discrete IP, not '*'). As I ramp this up to include more affiliates I'm wondering if I should be concerned about how many binding this site handles. Proabaly, in Acme's case I can do without the 'Acme.MyDomain.com' because, in reality, all traffic takes place via myApp.Acme.com. Mine is a niche site - very volume compared to most. At what point do I worry about all those bindings? thx

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• Copying single files into a folder that changes name every time the batch file is executed

  - by Daniel Jochem

  Can you please help, I am using this to put the text files made by the batch file into the folder created by the batch file as well. but my problem is that the name is changed of the new folder every time because it is named by the date and time it was created. This is the code: @echo off for /F " tokens=1,2,3* delims=/, " %%i IN ('date /T') DO ( set CUR_DAY_OF_WEEK=%%i set CUR_MONTH=%%j set CUR_DAY=%%k set CUR_YEAR=%%l) for /F " tokens=1,2,3* delims=:, " %%i IN ('time /T') DO ( set CUR_HOUR=%%i set CUR_MIN=%%j set AM_PM=%%k) if not exist E:\Private goto :F cd E:\Private md "E:\Private\%CUR_HOUR%.%CUR_MIN%%AM_PM% %j%%CUR_MONTH%-%CUR_DAY%-%CUR_YEAR%" goto :start :F if not exist F:\Private goto :G cd F:\Private md "F:\Private\%CUR_HOUR%.%CUR_MIN%%AM_PM% %j%%CUR_MONTH%-%CUR_DAY%-%CUR_YEAR%" goto :start :G cd G:\Private md "G:\Private\%CUR_HOUR%.%CUR_MIN%%AM_PM% %j%%CUR_MONTH%-%CUR_DAY%-%CUR_YEAR%" goto :start :start start /min A /stext A.txt start /min B /stext B.txt start /min C /stext C.txt start /min D /stext D.txt (As the directory (E:-G:) changes, how can I check all without an error? And once that is found, then put all these text files into the date folder.

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• plot 3D and combine in matlab

  - by George

  Hello ,i have this matrix "experiment=2*rand(npoints,3)-1". I want to plot in in 3D,so i use "mesh(experiment)". How can i take red points in my plot? Also,i want to implement in the above plot , a sphere with radius 1 at 0,0,0. I did : mesh(experiment) hold on [x,y,z]=sphere; r=1; mesh(r*x,r*y,r*z) hold off but 1) i am not taking radius 1 2) the figures just showing in the same graph but don't combine Thanks

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• exported variable not persisted after script execution

  - by Daniele

  I'm facing a wierd issue. I've a vm with solaris 11, and trying to write some bash scripts. if, on the shell, I type : export TEST=aaa and subsequently run: set I correctly see a new environment variable named TEST whose value is aaa. If, however I do basically the same thing in a script. when the script terminates, I do not see the variable set. To make a concrete example, if in a file test.sh I have: #!/usr/bin/bash echo 1: $TEST #variable not defined yet, expect to print only 1: echo 2: $USER TEST=sss echo 3: $TEST export TEST echo 4: $TEST it prints: 1: 2: daniele 3: sss 4: sss and after its execution, TEST is not set in the shell. Am I missing something? I tried both to do export TEST=sss and the separate variable set/export with no difference.

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• open flash chart help needed

  - by Carlos Barbosa

  def reparto_de_ventas_por_marca #obtener los montos de las ventas en el periodo comprendido y sumarlas @ventas = Venta.find(:all) @marcas = Marca.find(:all) title = Title.new("Ingresos de este mes: #{@total}") pie = Pie.new pie.start_angle = 35 pie.animate = true pie.tooltip = '#val# de #total#<br>#percent# de 100%' pie.colours = ["#245a9c", "#fff"] pie.values = [ @marcas.each do |result| PieValue.new(result.ventas.count, result.name) end ] chart = OpenFlashChart.new chart.title = title chart.add_element(pie) chart.x_axis = nil render :text => chart.to_s end It just doesn't works i need to get the values to create a graph with flash chart. any help will be appreciated.

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• Mysterious @ character in the Windows Registry

  - by Karel

  When I navigate to "HKEY_LOCAL_MACHINE\SOFTWARE\Classes\WMP.PlayCD\Shell\Play" in The Windows Registry, I find one REG_EXPAND_SE named MUIVerb on my Windows 7 system. However in its contents it's carrying "@%windir%\system32\wmploc.dll,-6503" Now my question is: What does this @ character mean or do? I am an MS-DOS grown up and I haven't seen such a notation before. Should I interprete it as the @ like in an e-mail address? What is the final result. Does it become "C:\%windir%\system32\wmploc.dll,-6503" eventually ?

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• NHibernate parent-childs save redundant sql update executed

  - by Broken Pipe

  I'm trying to save (insert) parent object with a collection of child objects, all objects are new. I prefer to manually specify what to save\update and when so I do not use any cascade saves in mappings and flush sessions by myself. So basically I save this object graph like: session.Save(Parent) foreach (var child in Parent.Childs) { session.Save(child); } session.Flush() I expect this code to insert Parent row, then each child row, however NHibernate executes this SQL: INSERT INTO PARENT.... INSERT INTO CHILD .... UPDATE CHILD SET ParentId=@1 WHERE Id=@2 This update statement is absolutely unnecessary, ParentId was already set correctly in INSERT. How do I get rid of it? Performance is very important for me.

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• Is there a way to bundle pdf tiles to a Kindle friendly file?

  - by Maciej Swic

  I'm downloading PDF approach plates from Navigraph, and i have a folder per airport with files named after their corresponding approach / departure etc. Now I'd like to take such a folder with a bunch of PDF files, automatically generate an index and combine them to a single .mobi file that i can send to my Kindle. The index created can be very simple and consist of the file name (without the extension). Tapping an index item should jump to the correct page for that chart. I know there is a host of apps that combine comic book jpg's to ebooks, but is there anything that does the above please?

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• Count the number of rows of a CSV file, with d3.js

  - by user2934073

  Suppose I have this CSV file Day,What 2013-10-27,Apple 2013-10-27,Cake 2013-10-27,Apple 2013-10-28,Apple 2013-10-28,Apple 2013-10-28,Blueberry 2013-10-28,Orange I would like to drawn with D3.js a time-series graph. All I need to do is to display the sum of the number of rows for each day. As an example, the 27 of November should have 3 as value, the 28th should have 4. Is there a way I can archive it? I've been trying to create a new dataset out of the CSV one with no positive results. var dataset; d3.csv("data.csv", function(d) { return { Day: new Date(d.Day), What: d.What }; }, function(error, rows) { dataset = rows; // I SUPPOSE THE FUNCTION THAT GENERATE THE NEW DATASET SHOULD GO THERE });

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• test if master dns has trasnfered copt to slave

  - by su55

  Hello, I setup my master and slave using freebsd. im currently running the Bind 9.X version, so far everything is working successfully. Just one small problem. I cant get the master copy of my dns to transfer it to the slave server. i included transfer-allow {192.168.1.111;}; // this is the slave servers ip i ran the rndc reload command to check but i dont see the copy in the /etc/named/master/? Any help would be necessary and if you like the layout of my dns, I can provide that too.

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• Skype account migration / username change

  - by Kristian Glass

  Some time ago now I created myself a Skype account. I've since amassed a number of contacts, and also realised that the username I chose really isn't one I wish to continue using, for a variety of reasons. Services like Twitter and GitHub offer username-change functionality; I can't find this in Skype. Am I missing something, or does it just not exist? If, as I suspect, it doesn't exist, is there anything I can do to migrate my contacts across to a new, more sensibly-named, account, or am I going to find myself having to manually publicise my account name change and adding contacts to the new account one-by-one?

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• Checking online users with Facebook Javascript SDK

  - by Roman

  Hi, I'm trying to build some kind of a social game in facebook, where I need that every user that has approved my APP is able to receive notifications from me. When the user approves my App, I save his UID in the DB for future reference. At some later time, I want to make it possible for other users find partners for a game - so I need a way to pick randomly some user from my DB and check if he's online. Then, send him a message and propose to play with the current player. So 2 questions: How can I check if some user is online, using Javascript SDK? It seems that in the new Graph API I can't get the users' online status. How can I then send him a message and propose to play the game? When he approves to play - he is being forwarded to the game page. Many thanks in advance, Roman

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• can QuickGraph support these requirements? (includes database persistence support)

  - by Greg

  Hi, Would QuickGraph be able to help me out with my requirements below? (a) want to model a graph of nodes and directional relationships between nodes - for example to model web pages/files linked under a URL, or modeling IT infrastructure and dependencies between hardware/software. The library would include methods such as * Node.GetDirectParents() //i.e. there could be more than one direct parent for a node * Node.GetRootParents() //i.e. traverse the tree to the top root parent(s) for the given node * Node.GetDirectChildren() * Node.GetAllChildren() (b) have to persist the data to a database - so it should support SQL Server and ideally SQLite as well. If it does support these requirement then I'd love to hear: any pointers to any parts of QuickGraph to dig into? what is the best concept re it's usage in terms of how to use database persistence - is it a simpler design to assume every search/method works directly on the database, or does QuickGraph support smarts to be able to work in memory and the "save" to database all changes at an appropriate point in time (e.g. like ADO.net does with DataTable etc) Thanks in advance

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• Windows Server 2008: Limit UDP/TCP packets per IP or ban

  - by WBAR

  How I can limit UDP/TCP packets per IP send to my host (or better PORT) per second or minute ? Would be nice to ban that IP for 12/24 hours or even for ever. I got Windows Server 2008 and I'm very poor in Windows administration but quite good in Linux. EDIT: By basic problem is that They sending a lot of rubbish UPD and TCP packets.. TCP packets without SYNCH, fragmented UDP packets so my servers stop responding.. So I need to cut off users (IPs) sending more than X packets per second. I need solution witch provides me, somehow, configurable: X packets of certain type (UDP, TCP or both - lets say parameter named Z ) are allowed to be received by IP on Y port, otherwise this packet should be DROPPED. My virtual hosts are hosted by VirtualBox and I'm able to forward all incoming packets certain type and certain port to the specific Virtual Host, but I need to DROP them before my VirtualBox receive them.

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• DB auto failover in c# does not work when the principal server physically goes offline

  - by user62521

  I'm setting up DB auto failover in C# with SQL Server 2008 and I have a 'high safety with automatic failover mirror' using a witness setup and my connection string looks like "Server=tcp:DC01; Failover Partner=tcp:DC02; database=dbname; uid=sewebsite;pwd=somerndpwd;Connect Timeout=10;Pooling=True;" During testing, when I turn off the SQL Server service on the principal server the auto failover works like a charm, but if I take the principal server offline (by shutting down the server or killing the network card) auto failover does not work and my website just times out. I found this article where the second last post suggests that its because we are using named pipes which does not work when the principal goes offline, but we force TCP in our connection string. What am I missing to get this DB auto failover working?

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• How do I open a file with a program via a shortcut from the cmd prompt

  - by PassByReference0

  Here's my predicament: When I add a program's location to my PATH, I can do the following in cmd prompt to open a file in my current directory: notepad++ open_me.txt And this opens open_me.txt in notepad++. However, I don't want to have to add every single program I want to run to my path. What I want is to add a folder called C:\Users\Me\Documents\Programs to my path and just drop shortcuts to various programs into that folder and have them function the same as adding them to my path. So I dropped a link to notepad++.exe named "np" in my folder, and what I got was this: I have to run it with start np (instead of just np) But more importantly, if I try start np open_me.txt, it opens notepad++.exe but looks for open_me.txt in notepad++'s directory. How can I do this properly? (Also, I'd like to be opening notepad++.exe with the shortened name of np)

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• Incremental backup and sync software

  - by martjno

  I need a free software for Windows (with gui or command line) that does incremental backup copying all files and storing changed or deleted files in a directory named like last change date (or a progressive number). To be more precise: D:\ is my Data drive E:\ is my Backupdrive. If i want to backup all my data from D:\: E:\d_lastbackup\ will contain a plain copy of all the files and folder content (no compression or archiving, same files attributes) of D E:\d_20090822\ will contain all files (with their full path) that are changed or deleted in the last version (since the previous one) E:\d_20090820\ will contain all files (with their full path) that are changed or deleted in the last version (since the previous one) and so on... I had a software working prefectly with an old USB harddsik by Maxtor, but it works only on that device. Any suggestion?

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• what is a performance way to 'tree-walking' through my Entity Framework data

  - by Greg

  Hi, I have a Entity Framework design with a few tables that define a "graph". So there can be a large chain of relationships between objects in the few tables via concept of parent/child relationships. What is a performance way to 'tree-walking' through my Entity Framework data? That is I assume I wouldn't want to load the full set of all NODES and RELATIONSHIPS from the database for the purpose of walking the tree, where the end result may only be identifying leaf nodes? Or would this be OK with the way lazy loading may work at the column/parameter level? Else how could I load just the skeleton of the objects and then when needing to refer to any attributes have them lazy load then?

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• remove files in unix

  - by nikhil

  Hi all, I often face this problem. I have a set of files in a folder and would like to delete all of them except a few. for example..if i have files named according to the date of creation(like 11-1-11.tar, 10-1-11.tar and so on). Now i would like to delete files like 10-1-11, 9-1-11 and so on but not some other files. Basically i would like to enforce what all should be deleted and what should be retained. How would i do this?

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