practical approach - Page 240

What kind of knowledge do you need to invent a new programming language?

- by systempuntoout

I just finished to read "Coders at works", a brilliant book by Peter Seibel with 15 interviews to some of the most interesting computer programmers alive today. Well, many of the interviewees have (co)invented\implemented a new programming language. Some examples: Joe Armstrong: Inventor of Erlang L. Peter Deutsch: implementer of Smalltalk-80 Brendan Eich: Inventor of JavaScript Dan Ingalls: Smalltalk implementor and designer Simon Peyton Jones: Coinventor of Haskell Guy Steele: Coinventor of Scheme Is out of any doubt that their minds have something special and unreachable, and i'm not crazy to think i will ever able to create a new language; i'm just interested in this topic. So, imagine a funny\grotesque scenario where your crazy boss one day will come to your desk to say "i want a new programming language with my name on it..take the time you need and do it", which is the right approach to studying this fascinating\intimidating\magic topic? What kind of knowledge do you need to model, design and implement a brand new programming language?

Read the article

.NET XML Serialization without <?xml> root node

- by Graphain

Hi, I'm trying to generate XML like this: <?xml version="1.0"?> <!DOCTYPE APIRequest SYSTEM "https://url"> <APIRequest> <Head> <Key>123</Key> </Head> <ObjectClass> <Field>Value</Field </ObjectClass> </APIRequest> I have a class (ObjectClass) decorated with XMLSerialization attributes like this: [XmlRoot("ObjectClass")] public class ObjectClass { [XmlElement("Field")] public string Field { get; set; } } And my really hacky intuitive thought to just get this working is to do this when I serialize: ObjectClass inst = new ObjectClass(); XmlSerializer serializer = new XmlSerializer(inst.GetType(), ""); StringWriter w = new StringWriter(); w.WriteLine(@"<?xml version=""1.0""?>"); w.WriteLine("<!DOCTYPE APIRequest SYSTEM"); w.WriteLine(@"""https://url"">"); w.WriteLine("<APIRequest>"); w.WriteLine("<Head>"); w.WriteLine(@"<Field>Value</Field>"); w.WriteLine(@"</Head>"); XmlSerializerNamespaces ns = new XmlSerializerNamespaces(); ns.Add("", ""); serializer.Serialize(w, inst, ns); w.WriteLine("</APIRequest>"); However, this generates XML like this: <?xml version="1.0"?> <!DOCTYPE APIRequest SYSTEM "https://url"> <APIRequest> <Head> <Key>123</Key> </Head> <?xml version="1.0" encoding="utf-16"?> <ObjectClass> <Field>Value</Field> </ObjectClass> </APIRequest> i.e. the serialize statement is automatically adding a <?xml root element. I know I'm attacking this wrong so can someone point me in the right direction? As a note, I don't think it will make practical sense to just make an APIRequest class with an ObjectClass in it (because there are say 20 different types of ObjectClass that each needs this boilerplate around them) but correct me if I'm wrong.

Read the article

Recommendations OutSourcing .NET Work To Indian Team [closed]

- by MT

hi there, I've been asked to research outsourcing some of our C# winform development work. The aim is to employ a dedicated Indian team of around 5 developers reporting to myself. A google search provides a plethora of different companies, none of which I have ever heard of before. I'm a little skeptical about this plan at the moment but remain open minded. I was hoping some of you guys had some general advice about how to approach this. Or even better recommendations for companies to contact based upon your experiences? Many thanks

Read the article

Applescript access to last.fm app via application icon in menu bar

- by Mark

Hi, I want to create an Applescript to drive the last.fm player app. I'm trying to do this via last.fm application icon in the menu bar rather than using the main application menus, as this approach (I think) won't cause last.fm to switch to the foreground. The overall plan is to bind my script to a quicksilver trigger so I can stop|start|skip|love|ban|tag tracks from the keyboard. My problem is I can't find what UI element to bind the applescript to. I've used UI Browser to scan through the UI object model but it draws a blank with the last.fm icon in the menu bar. Any thoughts appreciated.

Read the article

May a NSManagedObjectContext re-fault objects automatically?

- by frenetisch applaudierend

I am trying to create an application which allows background threads to update core data objects while the user might be reading the same data. My approach to this would be to use multiple NSManagedObjectContexts and then before a background thread does a -save: operation, I fetch the object the user is currently working on and fire the fault for all its properties and relationships recursively. This way I have all objects the user could act with in my NSManagedObjectContext without seeing the already updated values. But this can only work if the NSManagedObjectContext cannot decide himself that e.g. memory usage is too high, and starts faulting objects which I do not explicitly reference (other than through the NSManagedObject relationship). So the question is, can the NSManagedObjectContext decide that an object needs to be re-faulted, without intervention from my side? Thanks for your effort, Markus

Read the article

Questions every good PHP Developer should be able to answer

- by Rachel

I was going through Questions every good .Net developer should be able to answer and was highly impressed with the content and approach of this question and so in the same spirit, I am asking this question for PHP Developer. What questions do you think should a good PHP programmer be able to respond to? EDIT : I am marking this question as community wiki as it is not user specific and it aims to serve programming community at large. Looking forward for some amazing responses. NOTE : Please answer questions too as suggested in the comments so that people could learn something new too regarding the language.

Read the article

Data validation: fail fast, fail early vs. complete validation

- by Vivin Paliath

Regarding data validation, I've heard that the options are to "fail fast, fail early" or "complete validation". The first approach fails on the very first validation error, whereas the second one builds up a list of failures and presents it. I'm wondering about this in the context of both server-side and client-side data validation. Which method is appropriate in what context, and why? My personal preference for data-validation on the client-side is the second method which informs the user of all failing constraints. I'm not informed enough to have an opinion about the server-side, although I would imagine it depends on the business logic involved.

Read the article

What are some interesting fringe programming topics that might have hands-on training?

- by hal10001

Whenever training topic questions are asked, the answers are fairly typical, and involve a pretty limited subset of topics like OO, design patterns, algorithms, web services, SQL, etc., but I wonder if there are some fringe topics that are still applicable to the programming field and would give me a more rounded approach to development. When I think of "fringe", I think of 2600: The Hacker Quarterly articles that discuss how to use real world (sometimes obscure) exploits, or something like Maker Faire that demonstrates embedded systems programming using Arduino. I have around $1500-2000 to spend, and my job entails Java technologies, but that does not limit my options.

Read the article

Easiest/Best Way to Learn the x86 Instruction Set?

- by mudge

I would like to learn the x86 Instruction Set Architecture. I don't meaning learning an assembly for x86. I want to understand the machine code baby. The reason is that I would like to write an assembler for x86. Then I want to write a compiler that compiles to that assembly. I know that there are the Intel manuals and AMD manuals that cover the x86 instruction set. But those are very large and dense. I'm wondering if there is a more approachable (possibly tutorial) approach to learning the x86 instruction set architecture.

Read the article

ASP.Net Count Download Clicks

- by Marco

Hello, I thought that this was easier… I have a asp:hyperlink control, with target=”_blank”, pointing to the file I want the user to download. My plan is to track the number of times, the users click on this link. I thought in placing it in ajax update panel, to catch the postback and avoid full page refresh. However, hyperlink doesn’t have a onClick method. On the other hand I could use a linkbutton, which has a onClick built in. But It’s harder to make the file open in a new window… and I would also have to do something like: Response.AppendHeader("Content-Disposition","attachment; filename=myImage.jpg"); But I heard that the above approach has some problems with PPT, PPTX, PPS, PPSX… What is you'r opinion on this? How and why, would you do it?

Read the article

Unrecognized configuration section rewriter

- by Cristian Boariu

Hi guyrs, I'm trying to implement Approach 3 from this Url Rewriting article. I've added all the required configuration (in web.config for the UrlRewriter module) but when i try to add this in web.config: <rewriter> <rewrite url="~/products/(.+)" to="~/products.aspx?category=$1" /> </rewriter> </configuration> it gives me: Unrecognized configuration section rewriter... Please let me know me WHY it tells me that i put in the wrong place that rewriter xml node? Thanks...

Read the article

SO what RDF database do i use?

- by keisimone

Hi, i have a similar issue as espoused in http://stackoverflow.com/questions/695752/product-table-many-kinds-of-product-each-product-has-many-parameters i am convinced to use RDF now. but i already have a database in mysql and the code is in php. 1) So what RDF database should I use? 2) do i combine the approach? meaning i have a class table inheritance in the mysql database and just the weird product attributes in the RDF? I dont think i should move everything to a RDF database since it is only just products and the wide array of possible attributes and value that is giving me the problem. 3) what php resources, articles should i look at that will help me better in the creation of this? 4) thank you.

Read the article

How to get a PerSession context with WCF?

- by christophe31

Hi, I got running a WCF service with custom binding, for now it use httpTransport. <customBinding> <binding name="myHttpBindingConf"> <context contextManagementEnabled="true" protectionLevel="None" contextExchangeMechanism="ContextSoapHeader" /> <textMessageEncoding/> <httpTransport useDefaultWebProxy="false" /> </binding> </customBinding> I've Made a custom IExtension<OperationContext> to stock my data in a specific context by following those instructions: http://hyperthink.net/blog/a-simple-ish-approach-to-custom-context-in-wcf/ I would like to use a ContextMode.PerSession context. Which transport choose to get Session management? How to set new transport in place and letting object discovery enabled? How to force a PerSession context?

Read the article

Can a ScatterViewItem dynamically resize to fit its content?

- by Brett

We're hosting a control inside of a ScatterViewItem that dynamically changes its size at runtime as a result of having various sub-elements added, removed, and/or collapsed. We would like to have the hosting ScatterViewItem resize as well to properly fit its child controls, but we're having a hard time making this happen. We've tried a number of different things and the closest we've come is hooking into the child control's SizeChanged event and explicitly setting the ScatterViewItem's Width and Height, but this approach still has issues. When you define a ScatterViewItem and its content in XAML, the ScatterViewItem is sized appropriately. We would like to force the same behavior at runtime when its content changes size. Any help would be greatly appreciated. Thanks!

Read the article

Removing the contents of a Chan or MVar in a single discrete step

- by Bill

I'm writing a discrete simulation where request values from multiple threads accumulate in a centralized queue. Every n milliseconds, a manager wakes up to process requests. When the manager wakes up, it should retrieve all of the contents of the central queue in a single discrete step. While processing these, any client threads attempting to submit to the queue should block. When processing completes, the queue reopens and the manager goes back to sleep. What's the best way to do this? The retry behavior of STM isn't really what I want. If I use a Chan or MVar, there's no way to prevent clients from enqueuing additional requests during processing. One approach is to use an MVar as a mutex on a Chan holding the queue. Are there other ways to do this?

Read the article

Is there a J2SE sensor API?

- by Martin Strandbygaard

Does anyone know of a "standardized" Java API for working with sensors, and which is closely tied to J2ME as is the case with JSR 256? I'm writing a Java library for interfacing with a sensor network consisting of several different types of sensors (mostly simple stuff such as temperature, humidity, GPS, etc.). So far I've rolled my own interface, and users have to write apps against this. I would like to change this approach and implement a "standard" API so that implementations aren't that closely tied to my library. I've looked at JSR 256, but that really isn't a great solution as it's for J2ME, and my library is mostly used by Android devices or laptops running the full J2SE.

Read the article

Makefiles - Compile all .cpp files in src/ to .o's in obj/, then link to binary in /

- by Austin Hyde

So, my project directory looks like this: /project Makefile main /src main.cpp foo.cpp foo.h bar.cpp bar.h /obj main.o foo.o bar.o What I would like my makefile to do would be to compile all .cpp files in the /src folder to .o files in the /obj folder, then link all the .o files in /obj into the output binary in the root folder /project. The problem is, I have next to no experience with Makefiles, and am not really sure what to search for to accomplish this. Also, is this a "good" way to do this, or is there a more standard approach to what I'm trying to do?

Read the article

Creating a Stack Overflow notifier

- by Trey

I could not find a Stack Overflow notifier Android app so I am planning on making one. I hope that my app will serve a similar purpose as the Stack Overflow Notifier Chrome extension. This will be my first Android app so I am still unfamiliar with the platform. My main concern when creating this app is, what is the proper way to access the user's Recent Activity page? I thought of two different approaches but I'm not sure how to implement either one: Make the user login to Stack Overflow through the Browser application or an embedded browser and scrape their recent activity page occasionally for updates. Ask the user for their username and password and forward this information to Stack Overflow for authentication, storing cookies somehow to keep the session active. I think Astrid uses something similar to the first approach, but I haven't been able to figure it out yet from skimming their code. What is the correct way to handle a notification application like this that requires session management?

Read the article

Preventing $.POST hijack

- by Jamie

I'm currently building a facebook application. Lets say I have a variable $uid that identifies the user so I can store this in my database along with their submitted data. I pass $uid and $data via json encoded values using $.post. However, this doesn't prevent someone changing $uid to save data as someone else. I have been thinking about how to overcome this, so far I haven't found a solution apart from: create database with $uid $secretkey on first page load. When $.post send $secretkey with the post and then retrieve the $uid from the database. Would this be the correct approach to use?

Read the article

String replacement problem.

- by fastcodejava

I want to provide some template for a code generator I am developing. A typical pattern for class is : public ${class_type} ${class_name} extends ${super_class} implements ${interfaces} { ${class_body} } Problem is if super_class is blank or interfaces. I replace extends ${super_class} with empty string. But I get extra spaces. So a class with no super_class and interfaces end up like : public class Foo { //see the extra spaces before {? ${class_body} } I know I can replace multiple spaces with single, but is there any better approach?

Read the article

Memory efficient import many data files into panda DataFrame in Python

- by richardh

Read the article

JQuery, ASCX and webmethods not seems to be working

- by Karthik K

Hi all, I have a cascading dropdown (3 of them) Type, Categories and Sub Categories. Type loads first and upon selection of Type, Category load and selection of Category, Sub Category loads. Also i have 2 buttons, "Add Category" and "Add Sub Category" Upon clicking on these buttons, i call a JQuery Modal Form to add them. I use Webmethod in code behind to add them to database This works perfectly in ASPX page. Since I need use this in 3-4 pages, i thought of making the above as User control (ASCX). When i try to use this in a webpage, the webmethods in ASCX don't get called. Is my approach correct? what should be done for my scenario lOoking forward for your suggestions. Thanks in advance Karthik

Read the article

How to detect when window is closed when using Show() in WinForms C#

- by MadBoy

I've been using ShowDialog() in following way for all my new Windows. SomeGui test = new SomeGui(); test.ShowDialog(); refreshSomeListView(); However recently I've started to use Show() instead of ShowDialog() and it's working much better. The only drawback of this is that refreshSomeListView(); cannot be used like in example above since if i leave it there it's executed instantly when new Window shows up. What's the best way to know that the user has closed test window and that now refreshSomeListView(); should be executed? What's suggested approach for this? Should it involve setting events in test GUI on Close/Closing or there's other / better method?

Read the article

Core Data Relationship List

- by Dylan Copeland

I'm not sure whether or not this is the appropriate way of doing this, but I was wondering what's the best way to approach a relationship to a value in a list with Core Data? For example, say you have a 'person' entity. Each person can have a different 'hair color'. I'm trying to basically define the hair colors in my data model and allow the 'person' entity to have a relationship to their given 'hair color. Is this possible? Good idea or bad? Thanks in advance.

Read the article

iphone OCMockObject and unit-testing a class that inherits from NSURLConnection

- by Justin Galzic

I want to unit test the custom init method of a class that inherits from NSURLConnection -- how would I do this if the init of my testable class invokes NSURLConnection's initWithRequest? I'm using OCMock and normally, I can mock objects that are contained within my test class. For this inheritance scenario, what's the best approach to do this? - (void)testInit { id urlRequest = [OCMockObject mockForClass:[NSURLRequest class]]; MyURLConnectionWrapper *conn = [[MyURLConnectionWrapper alloc] initWithRequest:urlRequest delegate:self someData:extraneousData]; } My class is implemented like this: @interface MyURLConnectionWrapper : NSURLConnection { } - (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate someData:(NSString *)fooData @end @implementation MyURLConnectionWrapper - (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate someData:(NSString *)fooData { if (self = [super initWithRequest:request delegate:delegate]) { // do some additional work here } return self; } Here's the error I get: OCMockObject[NSURLRequest]: unexpected method invoked: _CFURLRequest

Search Results

Search found 10556 results on 423 pages for 'practical approach'.

Page 240/423 | < Previous Page | 236 237 238 239 240 241 242 243 244 245 246 247 | Next Page >

- by systempuntoout

- by Graphain

- by MT

- by Mark

- by frenetisch applaudierend

- by Rachel

- by Vivin Paliath

- by hal10001

- by mudge

- by Marco

- by Cristian Boariu

- by keisimone

- by christophe31

- by Brett

- by Bill

- by Martin Strandbygaard

- by Austin Hyde

- by Trey

- by Jamie

- by fastcodejava

- by richardh

- by Karthik K

- by MadBoy

- by Dylan Copeland

- by Justin Galzic

< Previous Page | 236 237 238 239 240 241 242 243 244 245 246 247 | Next Page >