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  • OK Programming language from USB stick with no installation

    - by tovare
    I'm looking for a compiler or interpreter for a language with basic math support and File IO which can be executed directly from a memorystick in either Linux or Windows. Built in functionality for basic datastructures and sorting/searching would be a plus. (I've read about movable python, but it only supports windows) Thank you

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  • linux tooling for starting as a net programmer

    - by alfredo dobrekk
    What are the linux developper tools to do the things i do with .NET in my windows environnement : I would like to port my client server application that runs under winform/nhibernate/sql server. Language c# Database SQL server ORM Nhibernate Source control SVN / Tortoise Unit testing Nunit Continuous integration Cruise Control Should i go java and eclipse ? Python and ??? Ruby and ??? Is there some IDE that allow me to manage all these processes under linux ?

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  • Why do some languages not use semicolons and braces?

    - by Incognito
    It is interesting that some languages do not use semicolons and braces, even though their predecessors had them. Personally, it makes me nervous to write code in Python because of this. Semicolons are also missing from Google's GO language, although the lexer uses a rule to insert semicolons automatically as it scans. Why do some languages not use semicolons and braces?

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  • Value object or not for 3d points ?

    - by Stefano Borini
    I need to develop a geometry library in python, describing points, lines and planes in 3d space, and various geometry operations. Related to my previous question. The main issue in the design is if these entities should have identity or not. I was wondering if there's a similar library out there (developed in another language) to take inspiration from, what is the chosen design, and in particular the reason for one choice vs. the other.

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  • Hidden features of Clojure

    - by danlei
    Which lesser-known but useful features of Clojure do you find yourselves using? Feel free to share little tricks and idioms, but try to restrict yourselves to Core and Contrib. I found some really interesting information in answers to these similar questions: Hidden features of Haskell Hidden features of Python Hidden features of Java Hidden features of C There are many more "Hidden feature" questions for other languages, so I thought it would be nice to have one for Clojure, too.

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  • GNU Smalltalk text interface hard to use

    - by None
    I built GNU Smalltalk from source on my Mac because I couldn't get it working using fink and I found VMs like Squeak hard to understand. When I run the gst command it works fine, but unlike command line interfaces such the Python and Lua ones, it is hard to use because when I use the left or right arrow keys, I want the cursor to move left or right, but instead it inserts text like "^[[D". I understand why it does this but is there any way to fix it so it is more usable?

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  • Trying to understand the usage of class_eval

    - by eMxyzptlk
    Hello everyone, I'm using the rails-settings gem, and I'm trying to understand how you add functions to ActiveRecord classes (I'm building my own library for card games), and I noticed that this gem uses one of the Meta-programming techniques to add the function to the ActiveRecord::Base class (I'm far from Meta-programming master in ruby, but I'm trying to learn it) module RailsSettings class Railtie < Rails::Railtie initializer 'rails_settings.initialize', :after => :after_initialize do Railtie.extend_active_record end end class Railtie def self.extend_active_record ActiveRecord::Base.class_eval do def self.has_settings class_eval do def settings RailsSettings::ScopedSettings.for_thing(self) end scope :with_settings, :joins => "JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND settings.thing_type = '#{self.base_class.name}')", :select => "DISTINCT #{self.table_name}.*" scope :with_settings_for, lambda { |var| { :joins => "JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND settings.thing_type = '#{self.base_class.name}') AND settings.var = '#{var}'" } } scope :without_settings, :joins => "LEFT JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND settings.thing_type = '#{self.base_class.name}')", :conditions => 'settings.id IS NULL' scope :without_settings_for, lambda { |var| { :joins => "LEFT JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND settings.thing_type = '#{self.base_class.name}') AND settings.var = '#{var}'", :conditions => 'settings.id IS NULL' } } end end end end end end What I don't understand is why he uses class_eval on ActiveRecord::Base, wasn't it easier if he just open the ActiveRecord::Base class and define the functions? Specially that there's nothing dynamic in the block (What I mean by dynamic is when you do class_eval or instance_eval on a string containing variables) something like this: module ActiveRecord class Base def self.has_settings class_eval do def settings RailsSettings::ScopedSettings.for_thing(self) end scope :with_settings, :joins => "JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND settings.thing_type = '#{self.base_class.name}')", :select => "DISTINCT #{self.table_name}.*" scope :with_settings_for, lambda { |var| { :joins => "JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND settings.thing_type = '#{self.base_class.name}') AND settings.var = '#{var}'" } } scope :without_settings, :joins => "LEFT JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND settings.thing_type = '#{self.base_class.name}')", :conditions => 'settings.id IS NULL' scope :without_settings_for, lambda { |var| { :joins => "LEFT JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND settings.thing_type = '#{self.base_class.name}') AND settings.var = '#{var}'", :conditions => 'settings.id IS NULL' } } end end end end I understand the second class_eval (before the def settings) is to define functions on the fly on every class that 'has_settings' right ? Same question here, I think he could use "def self.settings" instead of "class_eval.... def settings", no ?

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  • DotNetNuke will not save from editor

    - by Staffan
    A DNN site version 05.02.00(275) When editing a HTML module the following happens: If I make the changes and save before the cookie "portalaliasid" expires (within 1 minute) all is well. BUT if I stay in the editor for a longer time, say 2 minutes, and posting I end up at the editor again with the old content. All my previous work is lost. Now I'm lost - is this a bug, a bad setting or what? /Staffan

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  • How large is a "buffer" in PostgreSQL

    - by Konrad Garus
    I am using pg_buffercache module for finding hogs eating up my RAM cache. For example when I run this query: SELECT c.relname, count(*) AS buffers FROM pg_buffercache b INNER JOIN pg_class c ON b.relfilenode = c.relfilenode AND b.reldatabase IN (0, (SELECT oid FROM pg_database WHERE datname = current_database())) GROUP BY c.relname ORDER BY 2 DESC LIMIT 10; I discover that sample_table is using 120 buffers. How much is 120 buffers in bytes?

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  • changing cell background color in qt

    - by Moayyad Yaghi
    hello .. i'm new to pyqt , and i'm still facing some newbie problems :D i have a QTableWidget that is item delegated on a QChoice control ( hope i said it right ) i need to have the cell background color changes whenever a user change the choice control selection briefly: how to change a cell background color in a table widget ?? i use pyqt4 and python 2.6 thanx in advance

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  • Route Angular to New Controller after Login

    - by MizAkita
    I'm kind of stuck on how to route my angular app to a new controller after login. I have a simple app, that uses 'loginservice'... after logging in, it then routes to /home which has a different template from the index.html(login page). I want to use /home as the route that displays the partial views of my flightforms controllers. What is the best way to configure my routes so that after login, /home is the default and the routes are called into that particular templates view. Seems easy but I keep getting the /login page when i click on a link which is suppose to pass the partial view into the default.html template: var app= angular.module('myApp', ['ngRoute']); app.config(['$routeProvider', function($routeProvider) { $routeProvider.when('/login', { templateUrl: 'partials/login.html', controller: 'loginCtrl' }); $routeProvider.when('/home', { templateUrl: 'partials/default.html', controller: 'defaultCtrl' }); }]); flightforms.config(['$routeProvider', function($routeProvider){ //sub pages $routeProvider.when('/home', { templateUrl: 'partials/default.html', controller: 'defaultCtrl' }); $routeProvider.when('/status', { templateUrl: 'partials/subpages/home.html', controller: 'statusCtrl' }); $routeProvider.when('/observer-ao', { templateUrl: 'partials/subpages/aobsrv.html', controller: 'obsvaoCtrl' }); $routeProvider.when('/dispatch', { templateUrl: 'partials/subpages/disp.html', controller: 'dispatchCtrl' }); $routeProvider.when('/fieldmgr', { templateUrl: 'partials/subpages/fieldopmgr.html', controller: 'fieldmgrCtrl' }); $routeProvider.when('/obs-backoffice', { templateUrl: 'partials/subpages/obsbkoff.html', controller: 'obsbkoffCtrl' }); $routeProvider.when('/add-user', { templateUrl: 'partials/subpages/users.html', controller: 'userCtrl' }); $routeProvider.otherwise({ redirectTo: '/status' }); }]); app.run(function($rootScope, $location, loginService) { var routespermission=['/home']; //route that require login $rootScope.$on('$routeChangeStart', function(){ if( routespermission.indexOf($location.path()) !=-1) { var connected=loginService.islogged(); connected.then(function(msg) { if(!msg.data) $location.path('/login'); }); } }); }); and my controllers are simple. Here's a sample of what they look like: var flightformsControllers = angular.module('flightformsController', []); flightforms.controller('fieldmgrCtrl', ['$scope','$http','loginService', function($scope,loginService) { $scope.txt='You are logged in'; $scope.logout=function(){ loginService.logout(); } }]); Any ideas on how to get my partials to display in the /home default.html template would be appreciated.

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  • [Django] How to post to a facebook page

    - by patrick
    Hi! I need to post a status update of one of my facebook page when I create a model into my django project, but I don't know how to do it using the new facebook graph api: http://github.com/facebook/python-sdk/blob/master/src/facebook.py can you explain to me how to do it? Thanks in advance :)

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  • What features would you like to see added to C++?

    - by George Edison
    Are there any features you would like to see added to C++? Maybe... A programming construct An extra operator A built-in function you think would be useful I realize questions like this are frowned upon, but I think this one is a genuine programming question that can be answered and the answers will spawn valuable discussion. (And it's community wiki.) Here is one of mine: How come C++ has no exponent operator, like Python's **?

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  • resolve snmp oids in perl

    - by Sec
    Is there a simple way/module to map snmp(MIB) strings to OIDs in perl? E.g. I start with "sysUpTime.0" and get "1.3.6.1.2.1.1.3.0". As far as I can see, Net::SNMP expects you to have them already mapped.

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  • How to get informative compile error messages when using flexmojos-maven-plugin?

    - by Tony
    I'am using flexmojos-maven-plugin to build my Flex module. So on the compile phase I'm getting org.apache.maven.plugin.MojoExecutionException: Error compiling! with no information on where (on what source file) the error happens and what is nature of the compile error. I'll appreciate if anyone can instruct me on how to make flexmojos-maven-plugin print more information about compile errors.

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  • Where does the creation of permissions live in Django?

    - by lazerscience
    I need to do some debugging, because the permissions for one of my models are created wrongly. So I tried to find the piece of code where Django creates the permissions upon syncdb and writes them in the database, but I haven't been successful at all; maybe I just overlooked the right lines of code, but if somebody can point me out the right module / line of code where this happens I'd be very happy!

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  • GHC.Generics and Type Families

    - by jberryman
    This is a question related to my module here, and is simplified a bit. It's also related to this previous question, in which I oversimplified my problem and didn't get the answer I was looking for. I hope this isn't too specific, and please change the title if you can think if a better one. Background My module uses a concurrent chan, split into a read side and write side. I use a special class with an associated type synonym to support polymorphic channel "joins": {-# LANGUAGE TypeFamilies #-} class Sources s where type Joined s newJoinedChan :: IO (s, Messages (Joined s)) -- NOT EXPORTED --output and input sides of channel: data Messages a -- NOT EXPORTED data Mailbox a instance Sources (Mailbox a) where type Joined (Mailbox a) = a newJoinedChan = undefined instance (Sources a, Sources b)=> Sources (a,b) where type Joined (a,b) = (Joined a, Joined b) newJoinedChan = undefined -- and so on for tuples of 3,4,5... The code above allows us to do this kind of thing: example = do (mb , msgsA) <- newJoinedChan ((mb1, mb2), msgsB) <- newJoinedChan --say that: msgsA, msgsB :: Messages (Int,Int) --and: mb :: Mailbox (Int,Int) -- mb1,mb2 :: Mailbox Int We have a recursive action called a Behavior that we can run on the messages we pull out of the "read" end of the channel: newtype Behavior a = Behavior (a -> IO (Behavior a)) runBehaviorOn :: Behavior a -> Messages a -> IO () -- NOT EXPORTED This would allow us to run a Behavior (Int,Int) on either of msgsA or msgsB, where in the second case both Ints in the tuple it receives actually came through separate Mailboxes. This is all tied together for the user in the exposed spawn function spawn :: (Sources s) => Behavior (Joined s) -> IO s ...which calls newJoinedChan and runBehaviorOn, and returns the input Sources. What I'd like to do I'd like users to be able to create a Behavior of arbitrary product type (not just tuples) , so for instance we could run a Behavior (Pair Int Int) on the example Messages above. I'd like to do this with GHC.Generics while still having a polymorphic Sources, but can't manage to make it work. spawn :: (Sources s, Generic (Joined s), Rep (Joined s) ~ ??) => Behavior (Joined s) -> IO s The parts of the above example that are actually exposed in the API are the fst of the newJoinedChan action, and Behaviors, so an acceptable solution can modify one or all of runBehaviorOn or the snd of newJoinedChan. I'll also be extending the API above to support sums (not implemented yet) like Behavior (Either a b) so I hoped GHC.Generics would work for me. Questions Is there a way I can extend the API above to support arbitrary Generic a=> Behavior a? If not using GHC's Generics, are there other ways I can get the API I want with minimal end-user pain (i.e. they just have to add a deriving clause to their type)?

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  • How does Microsoft generate the Event ID for winqual events?

    - by Tim
    I am curious about the IDs that are used to identify items in winqual. I assume it is some sort of hash. Is this published? Hash of the module name, its version and an offset? That seems appropriate but the size is too small to cover the possibilities unless some truncation/lossy algorithm is used. This seems to be generated with the minidump on the client machine.

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