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  • How to replace&add the dataframe element by another dataframe in Python Pandas?

    - by bigbug
    Suppose I have two data frame 'df_a' & 'df_b' , both have the same index structure and columns, but some of the inside data elements are different: >>> df_a sales cogs STK_ID QT 000876 1 100 100 2 100 100 3 100 100 4 100 100 5 100 100 6 100 100 7 100 100 >>> df_b sales cogs STK_ID QT 000876 5 50 50 6 50 50 7 50 50 8 50 50 9 50 50 10 50 50 And now I want to replace the element of df_a by element of df_b which have the same (index, column) coordinate, and attach df_b's elements whose (index, column) coordinate beyond the scope of df_a . Just like add a patch 'df_b' to 'df_a' : >>> df_c = patch(df_a,df_b) sales cogs STK_ID QT 000876 1 100 100 2 100 100 3 100 100 4 100 100 5 50 50 6 50 50 7 50 50 8 50 50 9 50 50 10 50 50 How to write the 'patch(df_a,df_b)' function ?

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  • What if I made an explicit reference to 'this' for use inside an inner class?

    - by badp
    So far, I've used this approach to access this from the scope of an inner class: class FooManagementWindow extends JFrame { JButton rejectFoo; //... void getFooAcceptingPanel(){ //... final FooManagementWindow referenceToThis = this; rejectFoo = new JButton("Reject"); rejectFoo.addEventListener(new EventListener() { @Override public void actionPerformed(ActionEvent arg) { referenceToThis.setEnabled(false); //this requires a network call //... referenceToThis.setEnabled(true); //the user may resume his work } }); //... } } However, I just learned that instead of declaring referenceToThis, a direct reference is kept for me as: FooManagementWindow.this I have no reason to think my less standard approach may lead to errors or weird corner cases. Or are there?

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  • Reverse Proxy (mod_rewrite) and Rails (absolute paths)

    - by SooDesuNe
    I have front end rails app, that reverse proxies to any of a number of backend rails apps depending on URL, for example http://www.my_host.com/app_one reverse proxies to http://www.remote_host_running_app_one.com such that a URL like http://www.my_host.com/app_one/users will display the contents of http://www.remote_host_running_app_one.com/users I have a large, and ever expanding number of backends, so they can not be explicitly listed anywhere other than a database. This is no problem for mod_rewrite using a prg:/ rewrite map reverse proxy. The question is, the urls returned by rails helpers have the form /controller/action making them absolute to the root. This is a problem for the page served by mod_rewrite because links on the proxied page appear as absolute to the domain. i.e.: http://www.my_host.com/app_one/controller/action has links that end up looking like /controller/action/ when they need to look like /app_one/controller/action mod_proxy_html seems like the right idea, but it doesn't seem to be as dynamic as I would need, since the rules need to be hard coded into the config files. Is there a way to fix this server-side, so that the links will be routed correctly?

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  • Find changed properties of a class

    - by Rohit
    I am using asp.net 3.5 I have a license class containing 10 properties and not marked as serializable. I have to log property changes to the database. License is an entity class,and it is not in my scope to modify it. So I cannot mark it as serializabel neither i can use IpropertyChanged Interface. Now i cannot store it in viewstate as it is not serializable. I wanted to store it so that i can compare it with new values and see which value has changed. How to proceed with this.

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  • In grails how to insert additional parameters (from session) in all url's

    - by HeDinges
    I would like to add an additional parameter in my url, the use case is the following: When user do their login they also specify a 'company' name and from that moment on, all urls should map to: /$company/$controller/$action/$id The main idea is to have the current company name available in all url's, have it bookmarkable, and not to have to pass the company name everywhere as a request parameter. Also, once users are logged in it is acceptable to have the chosen company name in session scope. What is the right way of inserting this parameter in all our urls? I tried to modify my UrlMappings mapping, but I didn't found a way to insert the company name. Thanks,

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  • Receiving SQL Server events from a CLR function

    - by Pablo Lerner
    I wrote a CLR class with several methods, which are linked as functions in a SQL Server 2005 database. When several of these functions are used in scope of one transaction or connection, I need another one to be automatically executed to clean up some stuff, at the time of transaction or connection close (either time is good for now, later I will decide which is best). I figure that receiving events from another new CLR functions can do, but I don't know how to achieve that. Can anyone point me to information on modules, documents or whatever, that can help me understand how to receive transaction or connection closing events in a CLR class, or how to execute a particular function when these events occur?

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  • What are the exact versions of stuff you have to install in order to be able to step-debug a Scala p

    - by Alex R
    How do YOU debug a Scala program? I mean YOU as in the person posting the Answer :) Please answer only from personal experience, not from stuff you've heard or read on the Internet. You should not believe everything you read on the Internet, especially tales of complex open-source software configurations that actually work :-) The are many Java tools which claim to support Scala in some way or another, but I have so far struck out in trying to get any one of them to actually let me set a breakpoint in Scala code and step through it. These are big, major open-source IDEs I'm talking about here. The main problem in getting a debugger to work seems to be the "version hell" with fast-changing IDEs, Plug-Ins, JDKs, and the Scala language itself. Hence, the more detailed re-statement of the question is appropriate: What is the exact version number of the IDE, Plug-In, JDK, Scala, and even Operating System, that you are successfully using? My question is related to this one, but wider in scope: http://stackoverflow.com/questions/2272705/how-to-debug-scala-code-when-outside-of-an-ide Thanks

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  • JSP cant find bean Class using "" modifiers

    - by Ravana
    Hey I'm using Netbeans for my IDE and I'm getting an error when I try to run my EJB program. I get an error when I declare and give the path of the class in my JSP to a bean. <jsp:useBean id="book" class="BookBean.Book" scope="application" /> <jsp:setProperty name="book" property="*" /> When I run the program I get this error javax.servlet.ServletException: java.lang.InstantiationException: class BookBean.Book : java.lang.IllegalAccessException: Class java.beans.Beans can not access a member of class BookBean.Book with modifiers "" and java.lang.InstantiationException: class BookBean.Book : java.lang.IllegalAccessException: Class java.beans.Beans can not access a member of class BookBean.Book with modifiers "" I removed the "" and put in '' to see if that works, but it doesn't. Any idea? I also put a breakpoint there and it def. is the root of the problem. Thanks.

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  • Why can't I have static public fields in my managed beans?

    - by AlanObject
    I just started using the Netbeans 7.1 beta and it is calling out errors of a type which I have never seen before. Specifically: A managed bean with a public field should not declare any scope other than @Dependent. The fields it is complaining about are public static final. I can understand the restriction on non-static fields, but I can't think of a good reason this would not be allowed for a static field. Unfortunately I use a lot of them since I don't like having constants in my code. I note that even though I get the red dot in the margin in the editor, the maven-driven build still works and GlassFish still runs my application the way I would expect. So what is my denoument on this issue? Am I going to have to move my static fields elsewhere or is there another way of handling this?

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  • Server IP must be a LAN IP (Port Forwarding Netgear)

    - by rphello101
    I'm trying to set up a server (Apache) on my computer (fairly new to it). As I understand it, for it to be accessible to other computers, I need to forward port 80. When I try to forward the port though, I get the error: Server IP must be a LAN IP. I noticed in ipconfig that my default gateway is different than my wireless router. My computer is not hardwired, not on WiFi. Furthermore, I do not, at this point, have a static IP. I read that it should still work with a dynamic IP until it changes. Any ideas on what I can do?

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  • Should I make my MutexLock volatile?

    - by sje397
    I have some code in a function that goes something like this: void foo() { { // scope the locker MutexLocker locker(&mutex); // do some stuff.. } bar(); } The function call bar() also locks the mutex. I am having an issue whereby the program crashes (for someone else, who has not as yet provided a stack trace or more details) unless the mutex lock inside bar is disabled. Is it possible that some optimization is messing around with the way I have scoped the locker instance, and if so, would making it volatile fix it? Is that a bad idea? Thanks.

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  • Which TCP ports to use?

    - by rowatt
    Is there a TCP port range which I can be sure will not be used by anything else for traffic between two machines? If I am reading RFC6335 correctly, I can be sure that no other applications will use specific ports in the Dynamic/Private/Ephemeral range of 49152-65535. However, if I understand correctly, it also states (section 8.1.2) that an application shouldn't assume that any given port in that range is available at any given time, which would mean I can't be 100% sure that it will be unused all the time. Specifically, I want to assign specific SSH traffic to a different port for the security benefit and so I can classify it differently for QoS purposes, and not have to worry about changing the port in the future.

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  • what factors should a fresher(for programmer job) consider and learn before saying yes to employer f

    - by Senthil
    what factors should a fresher(for programmer job) consider and learn before saying yes to employer for job offer? and to contract? and most importantly how should one get the details?how can I approach them? I know some employers dont want to give such details..right? I have shortlisted by a Software COmpany..that is parter with microsoft. and works on technology like VB ADO.DOTNET,and some other reporting stuffs.,sql servers etc.,Tell me about scope of that..because They are asking me to sign for 2 year certificate bond agreement..I want to be a great programmer and Project Leader after 5 years..advise me guys..Language/OS not problem for me,As I curious to learn more things. Most of the SO members are programmers..so yours advice is greatly appreciated

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  • Trouble Upgrading Rails 2 Routes for a Redmine Plugin

    - by user1858628
    I am trying to get a Redmine plugin designed for Rails 2 to work with Rails 3. https://github.com/dalyons/redmine-todos-scrum-plugin I've pretty much fixed most parts, but having no success whatsoever in getting the routes to work. The original routes for Rails 2 are as follows: map.resources :todos, :name_prefix => 'project_', :path_prefix => '/projects/:project_id', :member => {:toggle_complete => :post }, :collection => {:sort => :post} map.resources :todos, :name_prefix => 'user_', :path_prefix => '/users/:user_id', :controller => :mytodos, :member => {:toggle_complete => :post }, :collection => {:sort => :post} map.my_todos 'my/todos', :controller => :mytodos, :action => :index map.connect 'projects/:project_id/todos/show/:id', :controller => "todos", :action => "show" rake routes outputs the following: sort_project_todos POST /projects/:project_id/todos/sort(.:format) {:controller=>"todos", :action=>"sort"} project_todos GET /projects/:project_id/todos(.:format) {:controller=>"todos", :action=>"index"} POST /projects/:project_id/todos(.:format) {:controller=>"todos", :action=>"create"} new_project_todo GET /projects/:project_id/todos/new(.:format) {:controller=>"todos", :action=>"new"} toggle_complete_project_todo POST /projects/:project_id/todos/:id/toggle_complete(.:format) {:controller=>"todos", :action=>"toggle_complete"} edit_project_todo GET /projects/:project_id/todos/:id/edit(.:format) {:controller=>"todos", :action=>"edit"} project_todo GET /projects/:project_id/todos/:id(.:format) {:controller=>"todos", :action=>"show"} PUT /projects/:project_id/todos/:id(.:format) {:controller=>"todos", :action=>"update"} DELETE /projects/:project_id/todos/:id(.:format) {:controller=>"todos", :action=>"destroy"} sort_user_todos POST /users/:user_id/todos/sort(.:format) {:controller=>"mytodos", :action=>"sort"} user_todos GET /users/:user_id/todos(.:format) {:controller=>"mytodos", :action=>"index"} POST /users/:user_id/todos(.:format) {:controller=>"mytodos", :action=>"create"} new_user_todo GET /users/:user_id/todos/new(.:format) {:controller=>"mytodos", :action=>"new"} toggle_complete_user_todo POST /users/:user_id/todos/:id/toggle_complete(.:format) {:controller=>"mytodos", :action=>"toggle_complete"} edit_user_todo GET /users/:user_id/todos/:id/edit(.:format) {:controller=>"mytodos", :action=>"edit"} user_todo GET /users/:user_id/todos/:id(.:format) {:controller=>"mytodos", :action=>"show"} PUT /users/:user_id/todos/:id(.:format) {:controller=>"mytodos", :action=>"update"} DELETE /users/:user_id/todos/:id(.:format) {:controller=>"mytodos", :action=>"destroy"} my_todos /my/todos {:controller=>"mytodos", :action=>"index"} /projects/:project_id/todos/show/:id {:controller=>"todos", :action=>"show"} The nearest I have got for Rails 3 is follows: scope '/projects/:project_id', :name_prefix => 'project_' do resources :todos, :controller => 'todos' do member do post :toggle_complete end collection do post :sort end end end scope '/users/:user_id', :name_prefix => 'user_' do resources :todos, :controller => 'mytodos' do member do post :toggle_complete end collection do post :sort end end end match 'my/todos' => 'mytodos#index', :as => :my_todos match 'projects/:project_id/todos/show/:id' => 'todos#show' rake routes outputs the following: toggle_complete_todo POST /projects/:project_id/todos/:id/toggle_complete(.:format) todos#toggle_complete {:name_prefix=>"project_"} sort_todos POST /projects/:project_id/todos/sort(.:format) todos#sort {:name_prefix=>"project_"} todos GET /projects/:project_id/todos(.:format) todos#index {:name_prefix=>"project_"} POST /projects/:project_id/todos(.:format) todos#create {:name_prefix=>"project_"} new_todo GET /projects/:project_id/todos/new(.:format) todos#new {:name_prefix=>"project_"} edit_todo GET /projects/:project_id/todos/:id/edit(.:format) todos#edit {:name_prefix=>"project_"} todo GET /projects/:project_id/todos/:id(.:format) todos#show {:name_prefix=>"project_"} PUT /projects/:project_id/todos/:id(.:format) todos#update {:name_prefix=>"project_"} DELETE /projects/:project_id/todos/:id(.:format) todos#destroy {:name_prefix=>"project_"} POST /users/:user_id/todos/:id/toggle_complete(.:format) mytodos#toggle_complete {:name_prefix=>"user_"} POST /users/:user_id/todos/sort(.:format) mytodos#sort {:name_prefix=>"user_"} GET /users/:user_id/todos(.:format) mytodos#index {:name_prefix=>"user_"} POST /users/:user_id/todos(.:format) mytodos#create {:name_prefix=>"user_"} GET /users/:user_id/todos/new(.:format) mytodos#new {:name_prefix=>"user_"} GET /users/:user_id/todos/:id/edit(.:format) mytodos#edit {:name_prefix=>"user_"} GET /users/:user_id/todos/:id(.:format) mytodos#show {:name_prefix=>"user_"} PUT /users/:user_id/todos/:id(.:format) mytodos#update {:name_prefix=>"user_"} DELETE /users/:user_id/todos/:id(.:format) mytodos#destroy {:name_prefix=>"user_"} my_todos /my/todos(.:format) mytodos#index /projects/:project_id/todos/show/:id(.:format) todos#show I am guessing that I am not using :name_prefix correctly, resulting in duplicate paths which are then omitted. Any help would be greatly appreciated.

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  • Why use a do-end block in Lua?

    - by Mayron
    I keep trying to find answers for this but fail to do so. I wanted to know, what is the do-end block actually used for? It just says values are used when needed in my book so how could I use this? Do I use it to reduce the scope of local variables by placing a function in a do-end loop and place local variables outside of the function but inside this do-end block and the variables will be seen by the function? But then can the function still be called? Sorry for being very vague. I hope that makes sense. Maybe an illustrated example might be useful ^^

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  • Does JavaScript have an equivalent to Perl's DESTROY method?

    - by Eric Strom
    Is there any method that is called or event that is dispatched right before an Element is cleaned up by the JavaScript garbage collector? In Perl I would write: package MyObj; sub new {bless {}} sub DESTROY {print "cleaning up @_\n"} and then later: { my $obj = MyObj->new; # do something with obj } # scope ends, and assuming there are no external references to $obj, # the DESTROY method will be called before the object's memory is freed My target platform is Firefox (and I have no need to support other browsers), so if there is only a Firefox specific way of doing this, that is fine. And a little background: I am writing the Perl module XUL::Gui which serves as a bridge between Perl and Firefox, and I am currently working on plugging a few memory leaks related to DOM Elements sticking around forever, even after they are gone and no more references remain on the Perl side. So I am looking for ways to either figure out when JavaScript Elements will be destroyed, or a way to force JavaScript to cleanup an object.

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  • [C#] How to share a variable between two classes?

    - by Altefquatre
    Hello, How would you share the same object between two other objects? For instance, I'd like something in that flavor: class A { private string foo_; // It could be any other class/struct too (Vector3, Matrix...) public A (string shared) { this.foo_ = shared; } public void Bar() { this.foo_ = "changed"; } } ... // inside main string str = "test"; A a = new A(str); Console.WriteLine(str); // "test" a.Bar(); Console.WriteLine(str); // I get "test" instead of "changed"... :( I read there is some ref/out stuff, but I couldn't get what I'm asking here. I could only apply some changes in the methods scope where I was using ref/out arguments... I also read we could use pointers, but is there no other way to do it? Thanks Altefquatre

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  • Is it ok to store large objects (java component for example) in an Application variable?

    - by DustMason
    I am developing an app right now which creates and stores a connection to a local XMPP server in the Application scope. The connection methods are stored in a cfc that makes sure the Application.XMPPConnection is connected and authorized each time it is used, and makes use of the connection to send live events to users. As far as I can tell, this is working fine. BUT it hasn't been tested under any kind of stress. My question is: Will this set up cause problems later on? I only ask because I can't find evidence of other people using Application variables in this way. If I weren't using railo I would be using CF's event gateway instead to accomplish the same task.

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  • Configure Virtualbox guest with static IP, SSH and internet access from host

    - by koskoz
    I have an Ubuntu Server 12 virtualbox guest running on a Windows 7 host which has a dynamic IP (and I don't wanna change this considering it's a laptop and I'm changing network frenquently). I want to have a static IP for my VM and a SSH access from my host but I still want to have the internet access on my VM. I tried added a second host only adapter and configured /etc/network/interface to set eth1 to a static ip, but I can't connect via SSH to it. Setting only adapter1 to host only works for SSH and static IP but I lose the internet access.

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  • JSP doPost getAtribute null value

    - by newbie123
    I want to pass value to servlet but I keep get null value. <jsp:useBean id="Helper" class="model.Registration" scope="request"/> <form action="/Project/Registration" method="post" enctype="multipart/form-data"> <input type="text" size="20" name="name" value="<%=Helper.getName()%>"> <input type="submit"> </form> protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Registrationh2 = (Registration) request.getAttribute("Helper"); if(h2!=null){ System. out.println(h2.getName()); } else System. out.println("NULL"); } Is there anything wrong with my code?

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  • nginx not returning 304 on cached content

    - by Don H
    I'm using nginx as a reverse proxy with an Apache back-end handling some PHP files. The files return the right expiry headers and proxy_cache does a good job of caching them, but I've noticed that the cached content returns a 200 on every refresh, when it might be more efficient to return a 304 on the cached files. The files in question are generated by PHP. The urls do not have .php in them as they've been prettified. Any idea why nginx might not be returning 304 on repeated visits to a cached PHP output? To clarify: It's using proxy_cache for caching dynamic PHP pages (not static html pages generated by PHP). I'm setting expires headers in the PHP file of time + 24 hours. With that in mind, I was hoping nginx would be able to then return 304s on its cached versions during that 24 hour window.

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  • Getting Result of $q's Resolution or Rejection

    - by Kevin Meredith
    I'm looking at a $q example from Mastering Web Application Development with Angular. For this code, how can I retrieve the String result of pizzaOrderFulfillment.resolve(...) or pizzaOrderFulfillment.reject? var myApp = angular.module('myApp',[]); myApp.controller("MyCtrl", function ($scope, $q) { var Person = function(name) { this.eat = function(food) { return name + " is eating " + food; }; this.beHungry = function(reason) { return name + " is hungry because" + reason; }; }; // success var pizzaOrderFulfillment = $q.defer(); var pizzaDelivered = pizzaOrderFulfillment.promise; var man = new Person("man"); pizzaDelivered.then(man.eat, man.beHungry); pizzaOrderFulfillment.resolve("chicken"); // TODO: var successResult = "man is eating chicken" });

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  • How to store and access JSON data for a site?

    - by Callmeed
    I'm buiding an HTML/jQuery site where almost all the content comes from remote JSON data. I'm having trouble coming up with a good way to store and access the data in the future (scope-wise). Currently, I've written a jQuery plugin that gets the JSONP data when the site loads. But I have other functions and jQuery plugins that need to access this data. Where should this data be stored so other functions and plugins can access it? Should it be a global variable? If it matters, this site will only run on the iPad and the back-end of the site is in Rails.

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  • Persisting sensitve data in asp.net, odd implementation

    - by rawsonstreet
    For reasons not in scope of this question I have implemented a .net project in an iframe which runs from a classic asp page. The classic asp site persisted a few sensitive values by hitting the db on each page. I have passed there variables as xml to the aspx page, now I need to make these values available on any page of this .net site. I've looked into the cache object but we are on a web farm so I am not sure it would work. Is there a way I can can instantiate an object in a base page class and have other pages inherit from the base page to access these values? What is the best way to persist these values? A few more points to consider the site runs in https mode and I cannot use session variables, and I would like to avoid cookies if possible..

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  • How to suspend and resume browser tab groups?

    - by Robin Green
    Modern browsers such as Firefox and Chrome are able to shutdown and restore the same group of tabs they had before the next time you open them, and even sometimes remember additional tab state such as scroll position within the tab. I would like ideally to be able to select a group of tabs (about some coherent theme, perhaps) and save them away into some kind of "folder" that I could later open independently, without opening any other tabs. Obviously I can use bookmarks for this, but bookmarks are kind of old-fashioned. It would be excellent if it could also record forms that I had filled in but not submitted, scroll position, tab position within the tab group, and any other "dynamic" aspects of the current tab state.

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