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  • How do I learn Python from zero to web development? [closed]

    - by Terence Ponce
    I am looking into learning Python for web development. Assuming I already have some basic web development experience with Java (JSP/Servlets), I'm already familiar with web design (HTML, CSS, JS), basic programming concepts and that I am completely new to Python, how do I go about learning Python in a structured manner that will eventually lead me to web development with Python and Django? I'm not in a hurry to make web applications in Python so I really want to learn it thoroughly so as not to leave any gaps in my knowledge of the technologies involving web development in Python. Are there any books, resource or techniques to help me in my endeavor? In what order should I do/read them? UPDATE: When I say learning in a structured manner, I mean starting out from the basics then learning the advanced stuff without leaving some of the important details/features that Python has to offer. I want to know how to apply the things that I already know in programming to Python.

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  • Performing client-side OAuth authorized Twitter API calls versus server side, how much of a difference is there in terms of performance?

    - by Terence Ponce
    I'm working on a Twitter application in Ruby on Rails. One of the biggest arguments that I have with other people on the project is the method of calling the Twitter API. Before, everything was done on the server: OAuth login, updating the user's Twitter data, and retrieving tweets. Retrieving tweets was the heaviest thing to do since we don't store the tweets in our database, so viewing the tweets means that we have to call the API every time. One of the people in the project suggested that we call the tweets through Javascript instead to lessen the load on the server. We used GET search, which, correct me if I'm wrong, will be removed when v1.0 becomes completely deprecated, but that really isn't a concern now. When the Twitter API has migrated completely to v1.1 (again, correct me if I'm wrong), every calls to the API must be authenticated, so we have to authenticate our Javascript requests to the API. As said here: We don't support or recommend performing OAuth directly through Javascript -- it's insecure and puts your application at risk. The only acceptable way to perform it is if you kept all keys and secrets server-side, computed the OAuth signatures and parameters server side, then issued the request client-side from the server-generated OAuth values. If we do exactly what Twitter suggests, the only difference between this and doing everything server-side is that our server won't have to contact the Twitter API anymore every time the user wants to view tweets. Here's how I would picture what's happening every time the user makes a request: If we do it through Javascript, it would be harder on my part because I would have to create the signatures manually for every request, but I will gladly do it if the boost in performance is worth all the trouble. Doing it through Ruby on Rails would be very easy since the Twitter gem does most of the grunt work already, so I'm really encouraging the other people in the project to agree with me. Is the difference in performance trivial or is it significant enough to switch to Javascript?

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  • Why would you hire in-house software developers instead of outsourcing them to develop a product for your company?

    - by Terence Ponce
    Why would you hire in-house over outsourcing in developing a product for your company? I can only think of a few but I'm not entirely sure if they're good enough reason. This is actually for a debate that I'm going to have in class. I'm more inclined on the outsourcing part but unfortunately, I was asked to switch to the in-house side of the debate. Any ideas? UPDATE Thanks for the answers guys. The debate went well because of them. I'm pretty sure our side won the debate because of the points presented here.

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  • My partition table is facing limitations; having problems creating more partitions

    - by Terence
    I first noticed an issue when trying to install Linux Mint 14 as a third OS alongside Ubuntu 12.10 and Windows 7 - I was unable to create another partition to install Mint to. Poking around, I realised that I had reached the limit of primary partitions: (from left to right of the table) 1) a ~100 MB primary partition that I meant to use for storing Grub files but never got down to, 2) a 25 GB extended partition, with the entire partition containing an ext4 Ubuntu partition, 3) a ~513 GB partition containing Windows 7, 4) some ~50 GB of unallocated space, and finally 5) a 4 GB swap partition. I decided to wipe off the first ~100 MB partition, which I didn't need anyway. This brought me to a dilemma, however: as Ubuntu, during initial installation, had created an extended partition for itself, which meant that I could not create any more. Having an extended partition for Ubuntu is virtually useless as there is only enough space to contain Ubuntu itself, and the benefits of extended are worthless here. And if I go ahead and install Mint now, I would face the same issue of too many primary partitions in the future should I want to create any more. What I'd really like to do is this: convert the current extended partition into a normal primary partition, and create a new extended partition in the unallocated space for all future partitions. Is this possible, and if so how? Thanks in advance!

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  • RuntimeBinderException with dynamic in C# 4.0

    - by Terence Lewis
    I have an interface: public abstract class Authorizer<T> where T : RequiresAuthorization { public AuthorizationStatus Authorize(T record) { // Perform authorization specific stuff // and then hand off to an abstract method to handle T-specific stuff // that should happen when authorization is successful } } Then, I have a bunch of different classes which all implement RequiresAuthorization, and correspondingly, an Authorizer<T> for each of them (each business object in my domain requires different logic to execute once the record has been authorized). I'm also using a UnityContainer, in which I register various Authorizer<T>'s. I then have some code as follows to find the right record out of the database and authorize it: void Authorize(RequiresAuthorization item) { var dbItem = ChildContainer.Resolve<IAuthorizationRepository>() .RetrieveRequiresAuthorizationById(item.Id); var authorizerType = type.GetType(String.Format("Foo.Authorizer`1[[{0}]], Foo", dbItem.GetType().AssemblyQualifiedName)); dynamic authorizer = ChildContainer.Resolve(type) as dynamic; authorizer.Authorize(dbItem); } Basically, I'm using the Id on the object to retrieve it out of the database. In the background NHibernate takes care of figuring out what type of RequiresAuthorization it is. I then want to find the right Authorizer for it (I don't know at compile time what implementation of Authorizer<T> I need, so I've got a little bit of reflection to get the fully qualified type). To accomplish this, I use the non-generic overload of UnityContainer's Resolve method to look up the correct authorizer from configuration. Finally, I want to call Authorize on the authorizer, passing through the object I've gotten back from NHibernate. Now, for the problem: In Beta2 of VS2010 the above code works perfectly. On RC and RTM, as soon as I make the Authorize() call, I get a RuntimeBinderException saying "The best overloaded method match for 'Foo.Authorizer<Bar>.Authorize(Bar)' has some invalid arguments". When I inspect the authorizer in the debugger, it's the correct type. When I call GetType().GetMethods() on it, I can see the Authorize method which takes a Bar. If I do GetType() on dbItem it is a Bar. Because this worked in Beta2 and not in RC, I assumed it was a regression (it seems like it should work) and I delayed sorting it out until after I'd had a chance to test it on the RTM version of C# 4.0. Now I've done that and the problem still persists. Does anybody have any suggestions to make this work? Thanks Terence

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  • Deploy .net 4 via Acrive Directory group policy or WSUS

    - by Terence Johnson
    Is there a way to automatically deploy .net 4 using Active Directory group policy or WSUS? I want to push it out to lots of machines without having to go around to each one. Background: I have a VSTO ClickOnce application I want to deploy to non-admin users, but it uses .net 4, which won't install without admin rights, so ClickOnce fails for non-admins unless .net 4 is already installed.

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  • Windows Service and Group Policy unable to access network share on Win2008 Domain

    - by Terence Johnson
    I have one computer on my domain that has suddenly stopped receiving software updates via group policy. Domain logins still work, and group policy on the machine is still being updated, so it knows that there are new packages to install and where to look for them, but every time it tries to install a package, it throws a 1622 error (location not found). Logged in users can reach the same network shares, and every other computer on network is installing the packages. Further investigation found that other services running as "System" on the problematic computer are also unable to authenticate to network shares. How do I diagnose/fix this computer's account in Active Directory? The computer account exists, and is a member of "Domain Computers" - or is there something else I should be looking at?

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  • hplip gui required plugin

    - by Terence Stamp
    I downloaded hplip gui to manage my printer, but in order to set it up correctly, you must click the green puzzle piece labeled "install required plugin." Once you do, you are presented with two options: download it from HP's server or locate the file locally on your hard disk. In the past, I have had success with downloading it from HP's server. Currently, my luck is not as good. My question is simple. Where can I find the plugin on the Internet so that I might download it and install it using the second option of installing from my hard drive?

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  • RabbitMQ - How I do configure servers for zero-downtime upgrades?

    - by Terence Johnson
    Having read through the docs and RabbitMQ in Action, creating a RabbitMQ cluster seems straightforward enough, but upgrading or patching an existing RabbitMQ cluster seems to require the whole cluster to be restarted. Is there a way to combine clustering, shovel, federation, and load balancing to make a rolling upgrade possible without losing queues or messages, or have I missed something slightly more obvious?

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  • Password Protect XML-RPC

    - by Terence Eden
    I have a service running on a server which I want to access via XML-RPC. I've installed all the necessary bits. Within /etc/apache2/httpd.conf I have the single line SCGIMount /RPC2 127.0.0.1:5000 I can run xmlrpc commands from my server - and any server which connects to /RPC2. What I want to do is password protect the directory to stop unauthorised usage. Within /etc/apache2/httpd.conf I've added <Location /RPC2> AuthName "Private" AuthType Basic AuthBasicProvider file AuthUserFile /home/me/myhtpasswd Require user me </Location> Trying to access /RPC2 brings up the "Authorization Required" box and it accepts my username and password. However, xmlrpc now doesn't work! If I run xmlrpc localhost some_command on my server, I get the error Failed. Call failed. HTTP response code is 401, not 200. (XML-RPC fault code -504) Is there any way I can password protect my /RPC2 directory and have xmlrpc commands work?

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  • options for deploying application

    - by terence
    I've created a simple web application, a self-contained tool with a user system. I host it publicly for everyone to use, but I've gotten some requests to allow companies to host the entire application privately on their internal systems. I have no idea what I'm doing - I have no experience with deployment or server stuff. I'm just some person who learned enough JS and PHP to make a tool for my own needs. The application runs with Apache, MySQL, and PHP. What's the best way to package my application to let others run it privately? I'm assuming there's better options than just sending them all the source code. I'd like to find a solution that is: Does not require support to set up (I'm just a single developer without much free time) Easy to configure Easy to update Does there exist some one-size-fits all thing that I can give to someone, they can install it, and bam, now when they go to http://myapplication/ on their intranet, it works? Thanks for your help.

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  • Going For Gold: AngloGold Ashanti and Oracle Spatial 11g

    - by stephen.garth
    Save The Date: May 6 at 11:00am Pacific time Attend this free Directions Media live webinar to find out how AngloGold Ashanti is using Oracle Database 11g with a unique geospatial infrastructure based on Oracle Spatial 11g to support worldwide gold exploration and mining operations. Terence Harbort, Exploration Systems Architect at AngloGold Ashanti, will discuss how the company is addressing challenges including management of large volumes of highly varied mapping and image data, 3D visualization, and geospatial analysis. Viewers can paricipate in a live Q&A session at the end of the webinar. Date: May 6, 2010 Time: 11:00am PDT Register here

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  • New book in the style of Advanced Programming Language Design by R. A. Finkel [closed]

    - by mfellner
    I am currently researching visual programming language design for a university paper and came across Advanced Programming Language Design by Raphael A. Finkel from 1996. Other, older discussions in the same vein on Stackoverflow have mentioned Language Implementation Patterns by Terence Parr and Programming Language Pragmatics* by Michael L. Scott. I was wondering if there is even more (and especially up-to-date) literature on the general topic of programming language design. *) http://www.cs.rochester.edu/~scott/pragmatics/

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  • WCF InProcFactory error

    - by Terence Lewis
    I'm using IDesign's ServiceModelEx assembly to provide additional functionality over and above what's available in standard WCF. In particular I'm making use of InProcFactory to host some WCF services within my process using Named Pipes. However, my process also declares a TCP endpoint in its configuration file, which I host and open when the process starts. At some later point, when I try to host a second instance of this service using the InProcFactory through the named pipe (from a different service in the same process), for some reason it picks up the TCP endpoint in the configuration file and tries to re-host this endpoint, which throws an exception as the TCP port is already in use from the first hosting. Here is the relevant code from InProcFactory.cs in ServiceModelEx: static HostRecord GetHostRecord<S,I>() where I : class where S : class,I { HostRecord hostRecord; if(m_Hosts.ContainsKey(typeof(S))) { hostRecord = m_Hosts[typeof(S)]; } else { ServiceHost<S> host; if(m_Singletons.ContainsKey(typeof(S))) { S singleton = m_Singletons[typeof(S)] as S; Debug.Assert(singleton != null); host = new ServiceHost<S>(singleton,BaseAddress); } else { host = new ServiceHost<S>(BaseAddress); } string address = BaseAddress.ToString() + Guid.NewGuid().ToString(); hostRecord = new HostRecord(host,address); m_Hosts.Add(typeof(S),hostRecord); host.AddServiceEndpoint(typeof(I),Binding,address); if(m_Throttles.ContainsKey(typeof(S))) { host.SetThrottle(m_Throttles[typeof(S)]); } // This line fails because it tries to open two endpoints, instead of just the named-pipe one host.Open(); } return hostRecord; }

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  • How do I send data from Java to Flash locally?

    - by terence
    I have a website with a Java applet and a Flash application. I want the Java applet to send data to the Flash application locally. What's the best way to do this? The data I want to send are potentially large images (possibly up to 1MB in size). This means sending a base64 string to javascript and then to Flash would probably be too cumbersome. I don't want to have to contact external servers or anything; all of it should be possible locally and offline. Is there some easy way to just send this sort of data around? If I saved the file locally first, Flash wouldn't be able to access that, would it?

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  • Performance considerations of a large hard-coded array in the .cs file

    - by terence
    I'm writing some code where performance is important. In one part of it, I have to compare a large set of pre-computed data against dynamic values. Currently, I'm storing that pre-computed data in a giant array in the .cs file: Data[] data = { /* my data set */ }; The data set is about 90kb, or roughly 13k elements. I was wondering if there's any downside to doing this, as opposed to loading it in from an external file? I'm not entirely sure how C# works internally, so I just wanted to be aware of any performance issues I might encounter with this method.

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  • The type or namespace name 'DefaultTemplateLexer' could not be found

    - by user310291
    The official tutorial from http://www.antlr.org/wiki/display/ST/Five+minute+Introduction doesn't work because of DefaultTemplateLexer, how to fix ? using System; using Antlr.StringTemplate; class Script { static public void Main(string[] args) { StringTemplateGroup group = new StringTemplateGroup("myGroup", @"C:\Tutorials\stringtemplate", typeof(DefaultTemplateLexer)); StringTemplate helloAgain = group.GetInstanceOf("homepage"); helloAgain.SetAttribute("title", "Welcome To StringTemplate"); helloAgain.SetAttribute("name", "World"); helloAgain.SetAttribute("friends", "Terence"); helloAgain.SetAttribute("friends", "Kunle"); helloAgain.SetAttribute("friends", "Micheal"); helloAgain.SetAttribute("friends", "Marq"); Console.Out.WriteLine(helloAgain.ToString()); } }

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