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• What is a Web Framework ? How does it compare with LAMP

  - by Nishant

  I started web development in LAMP/WAMP and it was logical to me . There is a Web Server program called Apache which does the networking part of setting up a service on port 80 ( common port ) . If the request is regular HTML it uses the HTTP headers to transport files .And if the request for the file is a PHP one , it has a mod_php with which Apache invokes the PHP interpreter to process the file and it gives back HTML which is again transferred as usual HTML . Now the question is what is a Web Framework ? I came across Python based website creation and there is Flask . What is a flask , how does it compare with LAMP . Further are DJango / Ruby on Rails different from flask ? Can someone answer me and also give some good places to read on these .Thanks for your answers in advance . Further is things like LAMP slower than the common FRAMEWORKS because they claimn easy deplyment fo web apps .

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• Parsing a CSV File to a Rails Database

  - by Schroedinger

  G'day guys, I'm using fasterCSV and a rake script to parse a csv with about 30 columns into my rails db for a 'Trade' item. The script works fine when all of the values are set to strings, but when I change it to a decimal, int or other value, everything goes to hell. Wondering if fasterCSV has built in int etc parsing or whether I'll have to manage these within my model. Basically, I'm given a giant amount of trades data, need to import it, and then need to provide feedback with say the average trade volume, the times, etc. I understand I can do that all with the wonderful records provided to me by activeRecord but wondered if there was an easier way to populate a rather large Database with a given CSV? Several of the fields don't have values for certain rows, fasterCSV seems to work perfectly when they're all strings, but not when I try to get decimal or other.

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• Vb.net on running shows updation exception

  - by harun123

  I've a website in vb.net. While running the website i get the following error: "Current Recordset does not support updating. This may be a limitation of the provider, or of the selected locktype." My DB connection.inc file looks as follows: <%@ Import namespace="ADODB" % Dim strDataSource As String Dim cnnCRM As ADODB.Connection <% cnnCRM = New ADODB.Connection strDataSource = Server.MapPath(".") & "/database/crm.mdb" 'strDataSource="c://crm/crm.mdb" cnnCRM.Open("PROVIDER=MICROSOFT.JET.OLEDB.4.0;DATA SOURCE=" & strDataSource) % I've tried giving the record set object all the properties it required. Still the same error. Can anybody tell me how i can get rid of this error?.....

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• Flashing and closing PyS60 SIS

  - by Matrich

  I created a py script for S60 2nd Edition FP3 with a background image, database, sound files which are stored in a folder on c drive. After several hours, I have managed to convert it into sis which I sent to my mobile phone. First, I installed the sis on the external memory and it failed to work. I read online that it should be on the same drive as python runtime. So I installed it on phone memory but it just flashes and then closes. I made another sis with a database and it worked so I suspect it could be because it cant find the background image and sound files in the folder. How can I know the cause of this? Also, how can I include the background image and sound files with the sis so that they are automatically installed when installing the sis file?

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• Calculating spam probability

  - by Hobhouse

  I am building a website in python/django and want to predict wether a user submission is valid or wether it is spam. Users have an accept rate on their submissions, like this website has. Users can moderate other users' submissions; and these moderations are later metamoderated by an admin. Given this: user A with an submission accept rate of 60% submits something. user B moderates A's post as a valid submission. However, his moderations are often wrong, and his moderations' accept rate is a mere 30%. user C moderates A's post as spam. User C is usually right. His moderations' accept rate is 80%. How can I predict the chance of A's post being spam?

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• What is the method of choice to adjust CSS changes in vaadin?

  - by Karussell

  I am struggling with some minor layout changes in vaadin which has to be done on Java AND Css side. Everytime I need to adjust a layout thing like padding-top, background color or bold text of one component I need to set the style via Java code too: userLink.setStyleName("textbold"); The changes in my styles.css (under VAADIN/themes/app/) would then be: @import "../runo/styles.css"; .textbold { font-weight: bold; } ... Is this the correct way of changing the CSS or is there another way? Can I do this without affecting the Java code?

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• Django + Pydev/Eclipse + Google App Engine - possible?

  - by Lee Tang

  Has anyone been able to get Google App Engine/Django working in Pydev/Eclipse? I tried this but had difficulty getting Pydev to recognize all of the externally linked folders (django plugins) that I was referencing. I ended up copying all of those folders into the project en masse, rather than referencing them, resulting in a massively bloated project folder - it was really an unworkable solution that eventually made me give up the whole project. So, I'm wondering if anyone has tried this or has any idea what I might have been doing wrong. (Keep in mind this was my first attempt at using Pydev, Django, App Engine and Python!!)

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• How to ensure that no non-ascii unicode characters are entered ?

  - by Jacques René Mesrine

  Given a java.lang.String instance, I want to verify that it doesn't contain any unicode characters that are not ASCII alphanumerics. e.g. The string should be limited to [A-Za-z0-9.]. What I'm doing now is something very inefficient: import org.apache.commons.lang.CharUtils; String s = ...; char[] ch = s.toCharArray(); for( int i=0; i<ch.length; i++) { if( ! CharUtils.isAsciiAlphanumeric( ch[ i ] ) throw new InvalidInput( ch[i] + " is invalid" ); } Is there a better way to solve this ?

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• How to set a local image in pynotify?

  - by George Edison

  If I run the following in python in Ubuntu 10.04: >>> import pynotify >>> p = pynotify.Notification ("Notice","","/home/george/Pictures/test.png") >>> p.show() true The message displays as expected, except the image does not appear in the OSD. How can I display a local image? In fact, for what I need, it would be better if I could display a remote image. (via HTTP) How can I do that?

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• When compiling programs to run inside a VM, what should march and mtune be set to?

  - by Russ

  With VMs being slave to whatever the host machine is providing, what compiler flags should be provided to gcc? I would normally think that -march=native would be what you would use when compiling for a dedicated box, but the fine detail that -march=native is going to as indicated in this article makes me extremely wary of using it. So... what to set -march and -mtune to inside a VM? For a specific example... My specific case right now is compiling python (and more) in a linux guest inside a KVM-based "cloud" host that I have no real control over the host hardware (aside from 'simple' stuff like CPU GHz m CPU count, and available RAM). Currently, cpuinfo tells me I've got an "AMD Opteron(tm) Processor 6176" but I honestly don't know (yet) if that is reliable and whether the guest can get moved around to different architectures on me to meet the host's infrastructure shuffling needs (sounds hairy/unlikely). All I can really guarantee is my OS, which is a 64-bit linux kernel where uname -m yields x86_64.

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• My programme is for java

  - by Siddharth Pandey

  I wrote a codding on notepad and i was base on Candidate details i was trying to run the code like for example to say if u r in the school and we need the details for the candidate so all the details like name Id address age dateofbirth and soooo So my exatlly problem is that i have allready created the code and i have written it on the notepad so when ever i am going the command prompt and giving its path and all the details still it always show some problem like class interfierence or expected iw will paste the codding over here and pls if u can help me correct the coding it will be pleasure thank u. import java.swing.*; import javac.awt.*; public CandidateDetails extends JApplets; { JPanel Panel; JLabel LabelStudentID; JLabel LabelStudentNames; JLabel LabelStudentAddress; JLabel LabelStudentAge; JLabel LabelStudentDateofBirth; JLabel LabelStudentMobile no; JLabel LabelStudentCrouse; JTextField textStudentID; JTextField textStudentNames; JTextField textStudentAddress; JTextField textStudentAge; JTextField textStudentDateofBirth; JTextField textStudentMobileNo; JTextField textStudentCrouse; } public void init(); { Label StudentID = new JLabel("Student ID"); Label StudentNames = new JLabel("Student Names"); Label StudentAddress = new JLabel("Student Address"); Label StudentAge = new JLabel("Student Age"); Label StudentDateofBirth = new JLabel("Student DateofBirth"); Label StudentMobileNo = new JLabel("Student MobileNo"); Label StudentCourse = new JLabel("Student Course"); JTextField text("ID"); JTextField text("Names"); JTextField text("Address"); JTextField text("Age"); JTextField text("DateofBirth"); JTextField text("MobileofBirth"); JTextField text("Course"); } { GridBag layourt.NORTHWEST; b1=1; b2=2; gbc.gridconstraint(label Student ID); add.panel(ID); GridBag layourt.NORTHWEST; b1=1; b2=3; gbc.gridconstraint(text Student ID); add.panel(ID); GridBag layourt.NORTHWEST; b1=2; b2=3; gbc.gridconstraint(label Student Names); add.panel(Names); GridBag layourt.NORTHWEST; b1=3; b2=4; gbc.gridconstraint(text Student Names); add.panel(Names); GridBag layourt.NORTHWEST; b1=3; b2=5; gbc.gridconstraint(label Student Address); add.panel(Address); GridBag layourt.NORTHWEST; b1=3; b2=4; gbc.gridconstraint(text Student Address); add.panel(Address); GridBag layourt.NORTHWEST; b1=4; b2=5; gbc.gridconstraint(label Student DateofBirth); add.panel(DateofBirth); GridBag layourt.NORTHWEST; b1=5; b2=6; gbc.gridconstraint(text Student DateofBirth); add.panel(DateofBirth); GridBag layourt.NORTHWEST; b1=5; b2=4; gbc.gridconstraint(label Student MobileNo); add.panel(MobileNo); GridBag layourt.NORTHWEST; b1=5; b2=6; gbc.gridconstraint(text Student MobileNo); add.panel(MobileNo); GridBag layourt.NORTHWEST; b1=6; b2=7; gbc.gridconstraint(label Student Course); add.panel(Course); GridBag layourt.NORTHWEST; b1=7; b2=8; gbc.gridconstraint(text Student Course); add.panel(Course); }

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• Why is my code not printing anything to stdout?

  - by WM

  I'm trying to calculate the average of a student's marks: import java.util.Scanner; public class Average { public static void main(String[] args) { int mark; int countTotal = 0; // to count the number of entered marks int avg = 0; // to calculate the total average Scanner Scan = new Scanner(System.in); System.out.print("Enter your average: "); String Name = Scan.next(); while (Scan.hasNextInt()) { mark = Scan.nextInt(); countTotal++; avg = avg + ((mark - avg) / countTotal); } System.out.print( Name + " " + avg ); } }

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• Should I start a General Software Developer User Group? [closed]

  - by Jeb

  I'm moving to a small town (Panama City, Florida) at some point in the future. I've found a Linux user group, and a .Net user group, but I'd like to spend my time outside of the office learning about Python, Android, JQuery -- mostly things that aren't owned by .Net. I'm debating trying to start another user group of some sort there, primarily to attract programmers who use technologies other than .Net. What are some of the more general programming user groups in existence already? I'm looking for something I could franchise.

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• How can this closure test be written in other languages?

  - by Jian Lin

  I wonder how the following closure test can be written in other languages, such as C and Java. Can the same result be expected also in Perl, Python, and PHP? Ideally, we don't need to make a new local variable such as x and assign it the value of i inside the loop, but just so that i has a new copy in the new scope each time. (if possible). (some discussion is in this question.) The following is in Ruby, the "1.8.6" on the first line of result is the Ruby version which can be ignored. p RUBY_VERSION $foo = [] (1..5).each do |i| $foo[i] = lambda { p i } end (1..5).each do |j| $foo[j].call() end the print out is: [MacBook01:~] $ ruby scope.rb "1.8.6" 1 2 3 4 5 [MacBook01:~] $ Contrast that with another test, with i defined outside: p RUBY_VERSION $foo = [] i = 0 (1..5).each do |i| $foo[i] = lambda { p i } end (1..5).each do |j| $foo[j].call() end the print out: [MacBook01:~] $ ruby scope2.rb "1.8.6" 5 5 5 5 5 [MacBook01:~] $

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• Displaying Photos on iPhone

  - by Bjorn S.

  Hi all, I'm working on an iPhone app and I need to be able to display images to users. I have already gotten the code that takes the photo and stores it into the filesystem working well. Now I just need to figure out how to display the image. I've looked at the Three20 project I've read about on a few of the posts here, but it seems a bit cumbersome and like an extra dependency to import link and combine all of the Three20 library into my little app. Are there any other ways or a more streamlined library that will let me display photos to my users? Thanks! B.

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• java: relationship of the Runnable and Thread interfaces

  - by Karl Patrick

  I realize that the method run() must be declared because its declared in the Runnable interface. But my question comes when this class runs how is the Thread object allowed if there is no import call to a particular package? how does runnable know anything about Thread or its methods? does the Runnable interface extend the Thread class? Obviously I don't understand interfaces very well. thanks in advance. class PrimeFinder implements Runnable{ public long target; public long prime; public boolean finished = false; public Thread runner; PrimeFinder(long inTarget){ target = inTarget; if(runner == null){ runner = new Thread(this); runner.start() } } public void run(){ } }

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• format.js generate 406 Not Acceptable error

  - by Denis

  Hello, following code generate a 406 Not Acceptable error. What can be wrong with my code? def remote_create @photo = Photo.new(params[:photo]) respond_to do |format| if @photo.save # add @photo's thumbnail to last import tag format.js { render :update do |page| page.insert_html :bottom, 'polaroids' , :partial => 'polaroid', :locals => {:photo => @photo} end } else format.html end end end Started POST "/photos/remote_create" for 127.0.0.1 at 2010-03-14 14:02:08 Processing by PhotosController#remote_create as HTML Parameters: {"photo"=>{"photo"=>#<File:/var/folders/BT/BTpdsWBkF6myaI-sl3+1NU+++TI/-Tmp-/RackMultipart20100314-285-1y9eq1x-0>, "name"=>"4204497503_a0c43c561d.jpg"}} SQL (0.6ms) INSERT INTO "photos" ("created_at", "filename", "height", "name", "photo_content_type", "photo_file_name", "photo_file_size", "photo_updated_at", "size", "updated_at", "width") VALUES ('2010-03-14 13:02:08.449499', NULL, NULL, '4204497503_a0c43c561d.jpg', 'application/octet-stream', '4204497503_a0c43c561d.jpg', 136710, '2010-03-14 13:02:08.446370', NULL, '2010-03-14 13:02:08.449499', NULL) [paperclip] Saving attachments. [paperclip] saving /Users/denisjacquemin/Documents/code/projects/photos/public/system/photos/224/original/4204497503_a0c43c561d.jpg Completed in 101ms with 406

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• Django - Tips to avoid repeating code in views

  - by D Roddis

  I'm moving from a PHP background into Django development via python, mostly for the sake of tackling a MVC (or MVT) that I feel makes the most sense, although in this pattern I've started to notice a lot of repeated code in my views. For example, when logged in I have information regarding the user that I would like to appear on every page, although when using render_to_response and in every view this is required I have to grab the information and pass it to the render_to_response function. I'm wondering what would be the most efficient way to cut down on the duplicate code which would in essence be required in all views in a particular app. Thanks in advance.

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• from ggplot2 to OOo workflow?

  - by Andreas

  This is not really a programming question, but I try here none the less. I once used latex for my reports. But the people I work with needs to make small edits and do not have latex skillz. Openoffice is then the way to go. But saving ggplot images with dpi 100 makes for really ugly graphs. dpi = 600 is a no go (e.g. huge legend). So what to do? I currently save (still via ggsave) to eps - which openoffice can import. But performance is not good at all. Googling I found a bug for the poor eps performance in OOo, and also talk about a non-implemented svg feature. But none helps me right now. If you work with ggplot2 and OOo - What do you do? I have been unsuccesfull with pdf conversion for some reason.

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• Custom User Management for Google App Engine Java

  - by Gopi

  I am using GAE Java for a multi-user application. There are multiple users with different roles. Each user can login, do some operations and logout. The business restricts me from using Google User Service and I need to implement my own for authentication and session management. Can anyone please share with me how should I go about implementing my own user management? I have read its very tricky to implement own user management. Any pointers in terms of best approaches/ design / existing frameworks if any ? I could see some similar posts but they are for python.

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• C++ : Lack of Standardization at the Binary Level

  - by Nawaz

  Why ISO/ANSI didn't standardize C++ at the binary level? There are many portability issues with C++, which is only because of lack of it's standardization at the binary level. Don Box writes, (quoting from his book Essential COM, chapter COM As A Better C++) C++ and Portability Once the decision is made to distribute a C++ class as a DLL, one is faced with one of the fundamental weaknesses of C++, that is, lack of standardization at the binary level. Although the ISO/ANSI C++ Draft Working Paper attempts to codify which programs will compile and what the semantic effects of running them will be, it makes no attempt to standardize the binary runtime model of C++. The first time this problem will become evident is when a client tries to link against the FastString DLL's import library from a C++ developement environment other than the one used to build the FastString DLL. Are there more benefits Or loss of this lack of binary standardization?

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• matplotlib: working with range in x-axis

  - by user324333

  Hey Guys, I'm trying to do a basic line graph here, but I can't seem to figure out how to adjust my x axis. And here is the error I get when I try adjusting my range. from pylab import * plot ( range(0,11),[9,4,5,2,3,5,7,12,2,3],'.-',label='sample1' ) plot ( range(0,11),[12,5,33,2,4,5,3,3,22,10],'o-',label='sample2' ) xlabel('x axis') ylabel('y axis') title('my sample graphs') legend(('sample1','sample2')) savefig("sampleg.png",dpi=(640/8)) show() File "C:\Python26\lib\site-packages\matplotlib\axes.py", line 228, in _xy_from_xy raise ValueError("x and y must have same first dimension") ValueError: x and y must have same first dimension I want my range to be a list of strings: ["12/1/2007","12/1/2008", "12/1/2009","12/1/2010"] Any suggestions?

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• Bound a treeview control to user-defined complex type using EF 4

  - by GIbboK

  Hi, I use Asp.net, SQL 2008 and EF 4. I need display hierarchy data in a treeview control, Data is stored in a DB that use HierarchyId. Unfortunately, EF4 doesn't support HierarchyId. So in this case, I thought to have a stored procedure that deals with my hierarchy and return a result set back to EF that EF4 can turn into a collection of user-defined complex type that can then be bound directly to the treeview control. I imported a SPROC in EF 4 using Import Function and now I have a Complex DataType called: CategoryHierarchy_Result An image of my Model: Here some data from the Complex Type (in a GridView for example GridView1.DataSource = context.CategoryHierarchy(1);): My questions is: How to display my data from my Complex Type in a TreeView Control, showing a Tree structure that respect CategoryNodeString? I am a beginner an I never use TreeView before, any help or resource would be appreciated! Thanks!. Here some useful resource: http://www.robbagby.com/entity-framework/entity-framework-modeling-action-stored-procedures/

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• wxHaskell on OS X

  - by Bill

  I want to use wxHaskell on OS X (Snow Leopard, MacBook Pro). I was able to install the library successfully and the script below: module Main where import Graphics.UI.WX main :: IO () main = start hello hello :: IO () hello = do f <- frame [text := "Hello!"] quit <- button f [text := "Quit", on command := close f] set f [layout := widget quit] does result in a window being displayed with a single button, as specified. However, nothing happens when I click the button - I don't even get the visual response of the button turning blue to indicate that it's been depressed (haha, no pun intended). I've heard that you have to run a package called "macosx-app" on wxHaskell binaries to get them to run, but I can't find this anywhere. It's not on my machine or (as far as I can tell) in the WX or wxHaskell distros. Anyone know what I need to do to get this to work?

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• How to instantly termainate an un-supervised script on demand?

  - by errr

  I have a GUI which resembles an interpreter. It allows the user to write a script in Jython (implementation of Python in Java) and run it whenever he wants. Apart from that, I also wish to allow the user to instantly terminate the run whenever he wants. Thing is, I don't really know how to do it. The script is being run on a different Thread, but I don't know of any secure way to stop/interrupt/terminate a thread in the middle of its run, let alone not knowing what is being run by the thread/script (it could be a simple task or maybe some sort of a heavy SQL query against a DB, and a DB is something which requires careful resource handling). How can I instantly terminate such run on demand?

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