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  • How to understand the functional programming code for converting IP string to a number?

    - by zfz
    In a python discusion, I saw a way to convert IP string to a integer in functional progamming way. Here is the Link . The function is implemented in a single line. def ipnumber(ip): return reduce(lambda sum, chunk: sum <<8 | chunk, map(int, ip.split("."))) However, I have few ideas of funcional programming. Could anybody explain the function in detail? I've some knowledg of "map" and "reduce". But I don't konw what "|" and "chunk" mean here? Thanks.

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  • should a student be diversifying or mastering programming languages?

    - by Max Link
    As the question states, is it better if a student diversifies or explores when learning programming languages or should they focus only on 2-3 languages and really get to know them well? Example of what I mean by diversifying: Functional -> Scheme Procedural -> C Object Oriented -> Java Dynamic or scripting -> Python Other -> C++ I have a few breaks in between semesters sometimes (up to 3 months) and I'm thinking of either learning a new language or "master" those that I know right now. Which would benefit me in the future? I know some(about 3 months of self studying each) Java, C, and C++ already . If I'm not mistaken, where I live, the industry is heavy on Java, C++, and C#.

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  • Changes in Language Punctuation [closed]

    - by Wes Miller
    More social curiosity than actual programming question... (I got shot for posting this on Stack Overflow. They sent me here. At least i hope here is where they meant.) Based on the few responses I got before the content police ran me off Stack Overflow, I should note that I am legally blind and neatness and consistency in programming are my best friends. A thousand years ago when I took my first programming class (Fortran 66) and a mere 500 years ago when I tokk my first C and C++ classes, there were some pretty standard punctuation practices across languages. I saw them in Basic (shudder), PL/1, PL/AS, Rexx even Pascal. Ok, APL2 is not part of this discussion. Each language has its own peculiar punctuation. Pascal's periods, Fortran's comma separated do loops, almost everybody else's semicolons. As I learned it, each language also has KEYWORDS (if, for, do, while, until, etc.) which are set off by whitespace (or the left margin) if, etc. Each language has function, subroutines of whatever they're called. Some built-in some user coded. They were set off by function_name( parameters );. As in sqrt( x ) or rand( y ); Lately, there seems to be a new set of punctuation rules. Especially in c++ where initializers get glued onto the end of variable declarations int x(0); or auto_ptr p(new gizmo); This usually, briefly fools me into thinking someone is declaring a function prototype or using a function as a integer. Then "if" and 'for' seems to have grown parens; if(true) for(;;), etc. Since when did keywords become functions. I realize some people think they ARE functions with iterators as parameters. But if "for" is a function, where did the arg separating commas go? And finally, functions seem to have shed their parens; sqrt (2) select (...) I know, I koow, loosening whitespace rules is good. Keep reading. Question: when did the old ways disappear and this new way come into vogue? Does anyone besides me find it irritating to read and that the information that the placement of punctuation used to convey is gone? I know full well that K&R put the { at the end of the "if" or "for" to save a byte here and there. Can't use that excuse here. Space as an excuse for loss of readability died as HDD space soared past 100 MiB. Your thoughts are solicited. If there is a good reason to do this, I'll gladly learn it and maybe in another 50 years I'll get used to it. Of course it's good that compilers recognize these (IMHO) typos and keep right on going, but just because you CAN code it that way doesn't mean you HAVE to, right?

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  • Ruby Drag-n-Drop IDE and Ruby programming related

    - by RPK
    I am writing a small desktop GUI application using Ruby and Gtk2. I am using RubyMine 3 on Linux (Fedora). I created a simple class to create a Gtk Window but now I feel it takes more time to just keep adding code for a Button, Drop Down and TextBox etc. I need to write even more code if the DropDown needs to be populated at run-time. Is there any Ruby Gtk IDE which supports adding Controls with simple drag-n-drop? At least I can focus on the business logic instead of just defining position and sizes of controls. One more question. I subscribed to Ruby-Forum mailing list but it is often flooded with Spam. Which is the official Ruby forum? Recently NetBeans has withdrawn support for Ruby. Is it worth to learn Ruby seriously and use it in commercial environment or not?

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  • What PC for programming? [on hold]

    - by James Jeffery
    I'm asking this here because I'm looking for some advice on a PC that will be suitable for my needs. I currently have mac's and have rarely used PC's apart from my Vaio laptop, which is on it's way out. I will be using the PC for C# and .NET development. I mainly develop desktop apps using a PC, but I will be doing some ASP.NET as I'm switching from PHP to ASP. The selection of PC's are on here: http://www.pcworld.co.uk/ I have £500, but if I can not spend all of that I'd be happy. I will be doing nothing on the computer apart from C# development (desktop and ASP). Any help would be much appreciated. My applications are not intensive. They are usually automation software for web scraping and marketing purposes.

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  • Are `break` and `continue` bad programming practices?

    - by Mikhail
    My boss keeps mentioning nonchalantly that bad programmers use break and continue in loops. I use them all the time because they make sense; let me show you the inspiration: function verify(object) { if (object->value < 0) return false; if (object->value > object->max_value) return false; if (object->name == "") return false; ... } The point here is that first the function checks that the conditions are correct, then executes the actual functionality. IMO same applies with loops: while (primary_condition) { if (loop_count > 1000) break; if (time_exect > 3600) break; if (this->data == "undefined") continue; if (this->skip == true) continue; ... } I think this makes it easier to read & debug; but I also don't see a downside. Please comment.

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  • Graphics driver for ubuntu on dell latitude XT

    - by marc.riera
    Hi, we have a laptop (dell latitude xt) on our company, and we would like to install ubuntu on it. windows 7 works fine out of the box, so the hardware is fine. since this laptop has a touchscreen we just installed ubuntu 10.10 netbook edition 32x. But, we do not manage to enable the touchscreen, neither the vga graphic drivers. this is the output from lspci, if somebody cares. 00:00.0 Host bridge: ATI Technologies Inc Radeon Xpress 7930 Host Bridge 00:01.0 PCI bridge: ATI Technologies Inc RS7932 PCI Bridge 00:04.0 PCI bridge: ATI Technologies Inc Device 7934 00:06.0 PCI bridge: ATI Technologies Inc RS7936 PCI Bridge 00:07.0 PCI bridge: ATI Technologies Inc Device 7937 00:13.0 USB Controller: ATI Technologies Inc SB600 USB (OHCI0) 00:13.1 USB Controller: ATI Technologies Inc SB600 USB (OHCI1) 00:13.2 USB Controller: ATI Technologies Inc SB600 USB (OHCI2) 00:13.3 USB Controller: ATI Technologies Inc SB600 USB (OHCI3) 00:13.4 USB Controller: ATI Technologies Inc SB600 USB (OHCI4) 00:13.5 USB Controller: ATI Technologies Inc SB600 USB Controller (EHCI) 00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 14) 00:14.1 IDE interface: ATI Technologies Inc SB600 IDE 00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA) 00:14.3 ISA bridge: ATI Technologies Inc SB600 PCI to LPC Bridge 00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge 01:05.0 VGA compatible controller: ATI Technologies Inc Radeon Xpress 1250 03:01.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller 03:01.1 FireWire (IEEE 1394): Texas Instruments PCIxx12 OHCI Compliant IEEE 1394 Host Controller 03:01.3 SD Host controller: Texas Instruments PCIxx12 SDA Standard Compliant SD Host Controller 09:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5756ME Gigabit Ethernet PCI Express 0b:00.0 Network controller: Broadcom Corporation BCM4321 802.11a/b/g/n (rev 03) I've tryied to install ati drivers 9.3 , which I downloaded and installed, unpacked and installed, builded and installed, but nothing worked. Looks like the latests version is just accepted to work on jaunty 9.04, so they are kind of old. what else I can do? thanks. Marc Information added: lsusb and lspci -n |grep 01:05.0 sysop@wl083517:~$ lspci -n |grep 01:05.0 01:05.0 0300: 1002:7942 sysop@wl083517:~$ lsusb Bus 006 Device 002: ID 413c:8138 Dell Computer Corp. Wireless 5520 Voda I Mobile Broadband (3G HSDPA) Minicard EAP-SIM Port Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 002: ID 413c:8140 Dell Computer Corp. Wireless 360 Bluetooth Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 002: ID 0483:2016 SGS Thomson Microelectronics Fingerprint Reader Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 002: ID 1b96:0001 N-Trig Duosense Transparent Electromagnetic Digitizer Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 002: ID 03f0:1807 Hewlett-Packard Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub sysop@wl083517:~$

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  • Wacom Bamboo tablet for Doctors

    - by thandasoru
    My friend is a Skin specialist (Tricologist) and she has a computer with WinXP in her office. She asked me if I can recommend a hardware which would enable her to write on a graphics tablet that would appear on the screen. Her requirement is thus: There is a prescription paper, a sheet of paper (A4 size) which has a letter head (With the title of the Clinic, Doctor's name etc). The exact image of the paper is available on the Computer. She takes the pictures of the patient's head with a camera and pastes the photo over the sheet of paper. So the top half of the prescription paper will have the photo of the patient's head. In the second half, she wants to write the medication required. I have heard of Bamboo graphics tablet and I saw video in Youtube. But I am not sure if it would be the right solution for her. Can anyone please advise me on this?

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  • Online games programming basics

    - by Renkon
    I am writing with regard to an issue I am having nowadays. I have come up with an interesting idea of making an online game in C#, yet I do not have the knowledge to work with more than a player. Basic games like a TIC-TAC-TOE or a SNAKE were done already, and I would like to do a simple, but online, game. Would you mind giving me some tutorials or guides related to that? I would really like to learn how to work online with the client/server structure (though, I do know the basics about that structure). I look forward to reading from you. Yours faithfully, Renkon.

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  • Business/Development Liaison Wanting To Enhance Understanding In Programming

    - by James Alexander
    I lead software development for a team of of about 20 devs and we're primarily a .net/sql server shop. We've recently created a new role in our organization for a more business like role to assist in prioritization of development and this business liaison has asked me if there are any books or resources he could use to better understand software concepts in a meaningful way. Any suggestions or advice would be greatly appreciated.

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  • Low framerate on background apps

    - by user1698923
    My problem is that when a game is running in the foreground, in Full Screen mode, any applications on my second monitor (such as youtube videos, videos, not app specific) drop their frame-rate to about 2-3 FPS. It seems like some sort of power management option that I can't track down. As far as I can tell, it's not due to the GPU not being able to keep up. For instance, my PC can play League of Legends at about 280FPS when the framerate is uncapped. If i cap it at 60FPS using the in-game option, it has no affect on the performance of the background app. Summary Operating System Windows 8 Pro 64-bit CPU Intel Core i7 3820 @ 3.60GHz 42 °C Sandy Bridge-E 32nm Technology RAM 12.0GB Triple-Channel DDR3 @ 533MHz (7-7-7-20) Motherboard Gigabyte Technology Co., Ltd. X79-UD3 (SOCKET 0) 37 °C Graphics DELL U2713HM (2560x1440@59Hz) DELL U2713HM (2560x1440@59Hz) 1280MB NVIDIA GeForce GTX 570 (Gigabyte) 58 °C Hard Drives 212GB Volume0 (RAID) 1863GB Western Digital WDC WD20EARS-00MVWB0 (SATA) 36 °C 1863GB Western Digital WDC WD20EARS-00MVWB0 (SATA) 34 °C Optical Drives No optical disk drives detected Audio ASUS Xonar Essence STX Audio Device Operating System Windows 8 Pro 64-bit Computer type: Desktop Graphics Monitor 1 Name DELL U2713HM on NVIDIA GeForce GTX 570 Current Resolution 2560x1440 pixels Work Resolution 2560x1400 pixels State Enabled, Output devices support Multiple displays Extended, Secondary, Enabled Monitor Width 2560 Monitor Height 1440 Monitor BPP 32 bits per pixel Monitor Frequency 59 Hz Device \\.\DISPLAY4\Monitor0 Monitor 2 Name DELL U2713HM on NVIDIA GeForce GTX 570 Current Resolution 2560x1440 pixels Work Resolution 2560x1400 pixels State Enabled, Output devices support Multiple displays Extended, Primary, Enabled Monitor Width 2560 Monitor Height 1440 Monitor BPP 32 bits per pixel Monitor Frequency 59 Hz Device \\.\DISPLAY5\Monitor0 NVIDIA GeForce GTX 570 Manufacturer NVIDIA Model GeForce GTX 570 GPU GF110 Device ID 10DE-1086 Revision A2 Subvendor Gigabyte (1458) Series GeForce GTX 500 Current Performance Level Level 3 Current GPU Clock 845 MHz Current Memory Clock 1900 MHz Current Shader Clock 1690 MHz Voltage 0.988 V Technology 40 nm Die Size 520 mm² Release Date Dec 07, 2010 DirectX Support 11.0 OpenGL Support 5.0 Bus Interface PCI Express x16 Temperature 57 °C Driver version 9.18.13.2018 BIOS Version 70.10.55.00.01 ROPs 40 Shaders 512 unified Memory Type GDDR5 Memory 1280 MB Bus Width 64x5 (320 bit) Filtering Modes 16x Anisotropic Noise Level Moderate Max Power Draw 219 Watts Count of performance levels : 3 Level 1 - "Default" GPU Clock 50 MHz Memory Clock 135 MHz Shader Clock 101 MHz Level 2 - "2D Desktop" GPU Clock 405 MHz Memory Clock 324 MHz Shader Clock 810 MHz Level 3 - "3D Applications" GPU Clock 845 MHz Memory Clock 1900 MHz Shader Clock 1690 MHz Things I've tried: 1) Updating the graphics driver 2) Setting windows power mode to High Performance 3) Reset Nvidia Global Performance settings to default

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  • The Oscar of Java Programming

    - by Tori Wieldt
    Why bother nominating a peer, yourself or your company for a Duke's Choice Award? I asked Duke's Choice Award winner Fabiane Nardon, whose team won in 2005 for the Healthcare Information System they created for the Brazilian government, what it was like winning the award and if it had any impact on her career. Here's what she told me: 1) What was it like to win a Duke's Choice Award? For me it was like winning an Oscar or a Grammy :-) I think that for a Java developer, a Duke's Choice Award is probably the highest award you can get, so it was really an honor. We had an amazing team working on that project and the team really deserved it. We were all very happy when we got that email with the announcement. That moment was one of the most important moments of my career. 2) What benefits have you gotten from being a "Duke's Choice Award Winner?" I think the most important benefit you get from winning a Duke is the fact that you become known by your peers. This opens many doors, since you are approached by more people, get invitations to speak in more conferences, you meet people with the same technical interests you have and so on. I certainly benefited a lot from it. We were lucky that in 2005, when we got our award, the winners were featured in the JavaOne keynote, with short documentaries produced about each one. So, we could be on the stage and talk a little about the project. We got lots of press at the time. We see  today's winners benefiting a lot from the press coverage. 3) How is the the Brazilian Healthcare Information System project doing today? Still running and getting new features every year. I'm not involved on the project anymore, but there are good people taking care of it. We opened the code since the beginning, so different cities could use and add features to it. There are many new developers working on that code base right now and I hope they can take the whole system to a new level. 4) What are you up to these days? I worked in the healthcare field for many years and a few years ago I decided that it was time to move on and take the experience I got designing large scale and mission critical systems to other fields. Since then I have been working with high access internet applications. I also co-founded ToolsCloud, a company that provides a development environment with open source tools in the cloud. We just launched ToolsCloud in USA, so other companies can get the same bundle of tools, hassle free, that several companies are successfully using in Brazil. Besides that, right now I'm personally working on the coolest project I ever worked on. It combines several technical challenges with a good dose of social impact. We should launch it in the second semester and I should keep it as a secret for now. Hopefully it will be useful to many people and disruptive enough to maybe get us a new Duke's Choice Award. Who knows? Read more about Fabiane in the "Heroes of Java" series by Markus Eisele. Her Twitter handle is @FabianeNardon. The Duke's Choice Awards celebrate extreme innovation in the world of Java technology. Nominate an individual, a group or company who show the best in Java innovation. Nominate via the easy online form at www.Java.net/dukeschoice. Nominations are open until June 15, 2012.

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  • Role of "Refactoring" in good programming pratices?

    - by Niranjan Kala
    I have learned in Agile Development that: Refactoring is the process of clarifying and simplifying the design of existing code, without changing its behavior. I have heard about some GUI refactoring tools like resharper and DevExpress Refactor Pro! Here is my Questions: Question 1: how does it takes place in the Software development process and How far it effects the system? Question 2: Is Refactoring using these tools really fast the process of development/ maintenance?

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  • Python and only Python for almost any programming tasks!

    - by Wassim
    Am I wrong if I think that Python is all I need to master, in order to solve most of the common programming tasks? EDIT I'm not OK with learning new programming languages if they don't teach me new concepts of programming and problem solving; hence the idea behind mastering a modern, fast evolving, with a rich set of class libraries, widely used and documented, and of course has a "friendly" learning curve programming language. I think that in the fast evolving tech industry, specialization is key to success.

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  • How do i have 4GB of video memory with a 1GB video card?

    - by Tomas Spc Yaczik
    I ran the direct X diagnostic tool to take a look at my graphics capabilities and its telling me that the approximate video memory is clocked in at 4096MB. That doesn't make any sense, how is that possible? The only things that i can think of were that DirectX was inaccurate so i looked at the graphics statistics of my computer on CPU-Z which was included with the motherboard and that's telling me i have "negative" 1988MB. Not only is that not 4096MB, but its giving me a negative number and i know for a fact that you can't have a negative amount of memory???!!! The only things i can think of that would be amplifying my video memory output is the PCIe 3.0 bus, or that the motherboard is somehow including the on board video chip set with the video card which only then is only 2GB of video memory, which still has to be being amplified by something. Any suggestions?

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  • Web Development Services - Contribution of Programming and Testing

    Web Development Services include development of basic websites to highly complex and structured websites. Earlier local personal computer revolutionized the market and started offering application to cater all user needs but their mission and vision lacked the flexibility. Hence loop was filled after World Wide Web invented.

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  • Programming Test

    - by Travis Webb
    We are looking to hire some more Java developers onto our team, and plan to test their coding abilities with a test. We currently use a web-based Java test that automatically compiles and runs the code, but it is very flaky and we're having problems with our candidates losing their work on this site. Not only is this frustrating for everyone, it makes us look like we don't know what we're doing. Is there a popular testing suite out there? What do you use? I'm not interested in dogmatic arguments on whether or not I should be testing my candidates in this way, I'm looking for a tool that will help me do it.

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  • Programming logic to group a users activities like Facebook

    - by Chris Dowdeswell
    So I am trying to develop an activity feed for my site. Basically If I UNION a bunch of activities into a feed I would end up with something like the following. Chris is now friends with Mark Chris is now friends with Dave What I want though is a neater way of grouping these similar posts so the feed doesn't give information overload... E.g. Chris is now friends with Mark, Dave and 4 Others Any ideas on how I can approach this logically? I am using Classic ASP on SQL server. Here is the UNION statement I have so far: SELECT U.UserID As UserID, L.UN As UN,Left(U.UID,13) As ProfilePic,U.Fname + ' ' + U.Sname As FullName, 'said ' + WP.Post AS Activity, WP.Ctime FROM Users AS U LEFT JOIN Logins L ON L.userID = U.UserID LEFT OUTER JOIN WallPosts AS WP ON WP.userID = U.userID WHERE WP.Ctime IS NOT NULL UNION SELECT U.UserID As UserID, L.UN As UN,Left(U.UID,13) As ProfilePic,U.Fname + ' ' + U.Sname As FullName, 'commented ' + C.Comment AS Activity, C.Ctime FROM Users AS U LEFT JOIN Logins L ON L.userID = U.UserID LEFT OUTER JOIN Comments AS C ON C.UserID = U.userID WHERE C.Ctime IS NOT NULL UNION SELECT U.UserID As UserID, L.UN As UN,Left(U.UID,13) As ProfilePic, U.Fname + ' ' + U.Sname As FullName, 'connected with <a href="/profile.asp?un='+(SELECT Logins.un FROM Logins WHERE Logins.userID = Cn.ToUserID)+'">' + (SELECT Users.Fname + ' ' + Users.Sname FROM Users WHERE userID = Cn.ToUserID) + '</a>' AS Activity, Cn.Ctime FROM Users AS U LEFT JOIN Logins L ON L.userID = U.UserID LEFT OUTER JOIN Connections AS Cn ON Cn.UserID = U.userID WHERE CN.Ctime IS NOT NULL

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