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  • Calculate pi to an accuracy of 5 decimal places?

    - by pgras
    In this message at point 18 I saw following programming question: Given that Pi can be estimated using the function 4 * (1 – 1/3 + 1/5 – 1/7 + …) with more terms giving greater accuracy, write a function that calculates Pi to an accuracy of 5 decimal places. So I know how to implement the given function and how to choose how "far" I should calculate, but how can I tell when I've reached the "accuracy of 5 decimal places" ?

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  • Chapter 3: JavaFX Primer3

    JavaFX Script blends declarative programming concepts with object orientation. This provides a highly productive, yet flexible and robust, foundation for applications. However, with this flexibility comes responsibility from the developer.

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  • Vermont IT Jobs: C# Developer in Burlington

    Senior C# Engineer Qualifications: 5+ years of programming experience Strong C# development skills Thorough grounding in Object-Oriented design principles and design patterns Bachelor's Degree in Computer Science or related field Strong message-oriented development skills (JMS, MSMQ, TCP/IP, Web Services, etc.) Agile development background (understanding of methodology, terms, and process) Demonstrated teamwork and flexibility in previous work assignments Experience working...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Microsoft Press deal of the Day 11/October/2013 - F# for C# Developers

    - by TATWORTH
    Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2013/10/11/microsoft-press-deal-of-the-day-11october2013---f-for.aspxToday, 11/October/2013, O'Reilly on behalf of Microsoft Press are offering 50% off F# for C# developers. Just remember to use the code MSDEAL when you check out. "Extend your C# skills to F#—and create data-rich computational and parallel software components faster and more efficiently. Focusing on F# 3.0 and Microsoft Visual Studio 2012, you’ll learn how to exploit F# features to solve both computationally-complex problems as well as everyday programming tasks"

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  • Are there any good Java/JVM libraries for my Expression Tree architecture?

    - by Snuggy
    My team and I are developing an enterprise-level application and I have devised an architecture for it that's best described as an "Expression Tree". The basic idea is that the leaf nodes of the tree are very simple expressions (perhaps simple values or strings). Nodes closer to the trunk will get more and more complex, taking the simpler nodes as their inputs and returning more complex results for their parents. Looking at it the other way, the application performs some task, and for this it creates a root expression. The root expression divides its input into smaller units and creates child expressions, which when evaluated it can use to build it's own result. The subdividing process continues until the simplest leaf nodes. There are two very important aspects of this architecture: It must be possible to manipulate nodes of the tree after it is built. The nodes may be given new input values to work with and any change in result for that node needs to be propagated back up the tree to the root node. The application must make best use of available processors and ultimately be scalable to other computers in a grid or in the cloud. Nodes in the tree will often be updating concurrently and notifying other interested nodes in the tree when they get a new value. Unfortunately, I'm not at liberty to discuss my actual application, but to aid understanding a little bit, you might imagine a kind of spreadsheet application being implemented with a similar architecture, where changes to cells in the table are propagated all over the place to other cells that need the result. The spreadsheet could get so massive that applying multi-core multi-computer distributed system to solve it would be of benefit. I've got my prototype "Expression Engine" working nicely on a single multi-core PC but I've started to run into a few concurrency issues (as expected because I haven't been taking too much care so far) so it's now time to start thinking about migrating the Engine to a more robust library, and that leads to a number of related questions: Is there any precedent for my "Expression Tree" architecture that I could research? What programming concepts should I consider. I realise this approach has many similarities to a functional programming style, and I'm already aware of the concepts of using futures and actors. Are there any others? Are there any languages or libraries that I should study? This question is inspired by my accidental discovery of Scala and the Akka library (which has good support for Actors, Futures, Distributed workloads etc.) and I'm wondering if there is anything else I should be looking at as well?

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  • Why the Ubuntu App Developer website is not showing content about development for desktop?

    - by Zignd
    Looks like they removed every content that is not related with development for desktop. For example when you click in "Get Started" tab there is only information about the Ubuntu Touch and its SDK, when you click on "Resources" tab and then on "Programming languages" you only see C++, JavaScript and QML (no Python, Java, Mono, etc). You also can't find any information about Quickly, try clicking on "Quicky" at "Resources" in the website bottom and you will see a "Page not found" error. Is the site under maintenance or something else?

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  • How to change the icon of an aplicatication at the LxPanel on Lubuntu?

    - by Zignd
    After installing Lubuntu 12.10, I decided to install IDLE 3 (from the official Ubuntu repository), but something unexpected happened, its icon gets bigger then the LxPanel and all the another aplications icos, the same happens at the menu when I select it from Menu Programming IDLE 3 Check the image: Note: Wasn't possible to take a printscreen from IDLE at the Menu because the printscreen action ignore the menu when it is opened. Knowing that I'd like to know how to change the icon of an application? Or better, if possible, how to resize this specific icon to normal size?

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  • ASP.NET Web Form Model with Partial Rendering and Events

    This article explains the Event based ASP.NET Web Form programming model for a web application with reference to partial rendering and AJAX asynchronous postback....Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Best Text-to-Speech Solution for my Website [on hold]

    - by Tim Marshall
    I'm working on the 'Ease of Access' section of my website with the options to increase the font-size displayed on pages to a minimum, invert colours and whatnot. I wish to implement a plugin which, if enabled by the user, to read content on my website. Presumably my best option is a website plugin, however there might be some programming I've not come across which allows the likes of PHP to read content. I'm not entirely sure how this all works.

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  • 10 Effective and Free of Charge SEO Tips

    Building a website doesn't end up in polished web design and error-free programming codes. You have to be aware of the search engine optimization tips you should consider right after your purchasing of domain name. So here are the 10 free yet efficient SEO tips.

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  • APress Deal of the Day 4/June/2014 - C# Quick Syntax Reference

    - by TATWORTH
    Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2014/06/04/apress-deal-of-the-day-4june2014---c-quick-syntax.aspxToday’s $10 Deal of the Day from APress at http://www.apress.com/9781430262800 is C# Quick Syntax Reference. “The C# Quick Syntax Reference is a condensed code and syntax reference to the C# programming language. It presents the essential C# syntax in a well-organized format that can be used as a handy reference.”

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  • Save File Contents to Variable in Python3.3 [migrated]

    - by Neo_Programmer
    I have a Python3.3 script that seems to not work. The script will search for an XML pattern and then print the results to the screen. I am using Ubuntu 12.10 (AMD64) and python3.3. I prefer to use regex with XML, so please disregard this unconventional form of programming. #!/usr/bin/python3.3 import io, re openfile = open('./temp/xaiml/temp_db1.xaiml', 'r') TEMPDB = openfile.read() OUTPUT = print(''.join(re.findall('<cgy><prn>.*_.*<\/prn>.*<\/cgy>', TEMPDB, flags=re.I)))

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  • When creating a library for a simple program, what must I do to protect others from its lack of thread safety?

    - by DeveloperDon
    When creating a library for a simple program, is it more cost effective to make it thread safe or is there a way to detect the program's use in a multithreaded program and ASSERT() or otherwise determine (preferably at compile or link time) that it may create problems. Related help for this question would be automated tool support for finding potential problems with thread safety, programming language features that enforce it,

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  • Pre-rendered fire. Where to find? [on hold]

    - by Vladivarius
    I'm studying game programming. I haven't yet implemented generated fire rendering in my ,,engine'' so I'm looking for some pre-rendered fire textures for early demo-scenes, but they seems strangely difficult to find. I'm currently using some that I ripped from DMC but I want to try out different ones. Does anyone know where to find these? Software that could generate them would also be ok. Thanks :)

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  • Keyword Usage For Maximum SEO

    After analyzing and ranking your keywords for profitability you now need to know what to do with them. The keywords you choose are only useful if you use them correctly. You don't need to know computer programming or even how the search engines work, just follow these simple tips and you will get the maximum search engine optimization benefit from your keywords.

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  • Unable to install applications (Oneiric)

    - by yayu
    When I use the software center to install something, I get the error: An unhandlable error occured There seems to be a programming error in aptdaemon, the software that allows you to install/remove software and to perform other package management related tasks on using the command line: $sudo apt-get install <something> E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem. I am unable to install anything. How do we fix this?

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  • What should a Python developer know while learning Ruby?

    - by C J
    I have been a Python programmer for about 18 months, consisting of one internship and a few side projects, and I consider myself pretty comfortable in the language. However, there seems to be a lot of attention on Ruby in the programming field, but not a lot on Python anymore. So in learning Ruby, are there going to be Pythonic things that are just bad practices in Ruby? What should I watch out for, and what should I avoid?

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  • The Doorway to a Quality SEO Company

    To figure out what we saw in the short breather, let us try to make a synopsis from a bird's eye point of view. An SEO service comprises of some simple yet mandatory basics which should not be refuted for the quality maintenance. From the professional aspect, it is a rare combination of database management, application of programming logic, statistical analysis and innovative marketing.

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  • Should I keep investing into data structures and algorithms?

    - by Chiron
    These days, I'm investing heavily in data structures and algorithms and trying to solve some programming puzzles. I'm trying to code and solve with Java and Clojure. Am I wasting my time? should I invest more in technologies and frameworks that I already know in order to gain deeper knowledge (the ins and the outs) and be able to code with them more quickly? By studying data structures and algorithms, am I going to become a better programmer or those subjects are only important during college years?

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  • 12.04 Booting into Terminal

    - by user170796
    To preface this, I would like to say that I am completely new to Ubuntu and have essentially zero programming experience/experience working with command line and terminal. I installed Ubuntu because I would like to get into programming. If you could provide me with the simplest instructions possible, I would be grateful. I have a Lenovo Ideapad Y500 (Intel i7, NVidia GT 750m, 1TB HDD, 16GB SSD cache, 8GB RAM) with Windows 8 on it. Using a Live CD, I installed Ubuntu 12.04 onto a 75 GB partition. During the installation, I kept all default settings except for one thing; I decided to encrypt my home folder, and so checked the corresponding box. The installation completed, and I restarted. Once I restarted, I saw the options "Ubuntu, with Linux 3.2.0-23-generic" "Ubuntu, with Linux 3.2.0-23-generic (recovery mode)" "Memory test (memtest86+)" "Memory test (memtest86+, serial console 115200)" "Windows Recovery Environment (loader) (on /dev/sdb3)" "Windows 8 (loader) (on /dev/sdb5)" "System Setup" I chose the first option, and was directed to a screen with the Ubuntu logo and the row of five dots below that change from orange to white. Then, I was brought to a full screen terminal that prompted me to login, which I did. I saw no option to boot into GUI at all, and am lost. I've been searching around and have tried the "startx" command to no avail. Should the command have some sort of context or something? I've also tried selecting the recovery mode option from the boot manager. I've tried the resume option from the following menu, which eventually just shuts down the computer after displaying a lot of scrolling text that's too fast for me to read. I've also tried the failsafex mode from the recovery mode menu, which only brings up a terminal box at the bottom of the window that covers the entire bottom part of the screen. Commands won't work in this window. When I try to access Windows 8, I get a message saying that the EFI file path was not specified or something along those lines. I had to enable Secure Boot in order to access Windows 8 (I had disabled it to be able to boot from the Live CD), which is functioning normally. I am at a complete loss for what to do. Any help will be extremely appreciated. EDIT: Bonus question! If you could figure out a way for me to boot to Windows 8 without having to enable Secure Boot, it would save me a lot of trouble. I can deal with switching every time, but I'd rather not have to.

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  • Recommended readings for a sofware construction mini-course [on hold]

    - by Aivar
    I'm going to organize a mini-course for CS students who have completed CS1 (Python) and CS2 (Java). I'd like to show them more principled approach to programming practice and design, something along the lines of McConnel's Code Complete. If I had enough copies of Code Complete, I would assign some readings from that book. Can you recommend some freely available material (books, blog posts, articles, essays) for such a course? (I'd prefer to avoid topics specific to OOP and focus on more universal principles.)

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