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  • Programming activities for high school kids who have no idea what CS or programming is

    - by pointdxt
    I work at a small high school that's in a very high poverty area. There are only a handful of seniors that are thinking about applying to be an engineer of some sort in college and only 1 kid that applied for Computer Science (he has a couple acceptances so far!). He's been talking to me a lot as I majored in Computer Science as well and he is very excited about it. Unfortunately, our school doesn't have a Computer Science course of any kind so he asks me a lot of stuff. I want to help him out since he's really excited about majoring in CS but I don't know where to begin. I could say put Linux on a computer, go online and go research stuff like I did but this kid needs some direction and he doesn't even know what Linux is let alone have a free computer around for that sort of thing. He doesn't know much about CS but is keenly interested in having a computer do all sorts of things but I don't know how to help him in a meaningful way. Any advice? I'm not a teacher at the school so I'm not a great educator, I do IT at the school.

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  • close window in Tkinter message box

    - by rejinacm
    Hello, link text How to handle the "End Now" error in the below code: import Tkinter from Tkconstants import * import tkMessageBox tk = Tkinter.Tk() class MyApp: def __init__(self,parent): self.myparent = parent self.frame = Tkinter.Frame(tk,relief=RIDGE,borderwidth=2) self.frame.pack() self.message = Tkinter.Message(tk,text="Symbol Disolay") label=Tkinter.Label(self.frame,text="Is Symbol Displayed") label.pack() self.button1=Tkinter.Button(self.frame,text="YES") self.button1.pack(side=BOTTOM) self.button1.bind("<Button-1>", self.button1Click) self.button2=Tkinter.Button(self.frame,text="NO") self.button2.pack() self.button2.bind("<Button-1>", self.button2Click) self.myparent.protocol("WM_DELETE_WINDOW", self.handler) def button1Click(self, event): print "pressed yes" def button2Click(self, event): print "pressed no" def handler(self): if tkMessageBox.askokcancel("Quit?", "Are you sure you want to quit?"): self.myparent.quit() myapp = MyApp(tk) tk.mainloop()

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  • Kohonen SOM Maps: Normalizing the input with unknown range

    - by S.N
    According to "Introduction to Neural Networks with Java By Jeff Heaton", the input to the Kohonen neural network must be the values between -1 and 1. It is possible to normalize inputs where the range is known beforehand: For instance RGB (125, 125, 125) where the range is know as values 0 and 255: 1. Divide by 255: (125/255) = 0.49 (0.49,0.49,0.49) 2. Multiply by two and subtract one: ((0.49*2)-1)=-0.02 (-0.02,-0.02,-0.02) The question is how can we normalize the input where the range is unknown like our height or weight. Also, some other papers mention that the input must be normalized to the values between 0 and 1. Which is the proper way, "-1 and 1" or "0 and 1"?

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  • cool project to use a genetic algorithm for?

    - by Ryan
    I'm looking for a practical application to use a genetic algorithm for. Some things that have thought of are: Website interface optimization Vehicle optimization with a physics simulator Genetic programming Automatic test case generation But none have really popped out at me. So if you had some free time (a few months) to spend on a genetic algorithms project, what would you choose to tackle?

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  • Crossfading audio with PyQT4 and Phonon

    - by dwelch
    I'm trying to get audio files to crossfade with phonon. I'm using PyQT4. I have tracks queuing properly, but I'm stuck with the fade effect. I think I need to be using the KVolumeFader effect. Here's my current code: def music_play(self): self.delayedInit() self.m_media.setCurrentSource(Phonon.MediaSource(self.playlist[self.playlist_pos])) self.m_media.play() def music_stop(self): self.m_media.stop() def delayedInit(self): if not self.m_media: self.m_media = Phonon.MediaObject(self) audioOutput = Phonon.AudioOutput(Phonon.MusicCategory, self) Phonon.createPath(self.m_media, audioOutput) def enqueueNextSource(self): if len(self.playlist) >= self.playlist_pos+1: self.playlist_pos += 1 self.m_media.enqueue(Phonon.MediaSource(self.playlist[self.playlist_pos])) else: self.m_media.stop() Can anyone give me some advice on implementing the effect?

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  • What is your favorite pastime to engage in while your project is buidling?

    - by ondesertverge
    As my average project grows in size the sum of build times throughout the day (and night) adds up to a substantial amount of time. Some of the things I or others do in this time include: Reading the news Thinking of ways to advance the project Looking at other projects Throwing darts Checking the unanswered list on stackoverflow.com Build times aren't constant making it hard to plan constructive use of them. I would like to hear of a method in use to make beneficial use of those few minutes that can add up to a few hours.

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  • What should a conference newbie bring to make the most out of their first conference?

    - by skarnis
    I am planning to attend my first developer conference (Microsoft TechDays 2008 in Toronto). I have been looking around for suggestions so that I can prepare and make the most out of my first developer conference. Many articles make suggestions about asking questions, getting involved, being social. These are great! I am also wondering about physical items. I have seen many conference photos with most of the audience having their laptops. Are they just taking notes? Are they working on a problem during the session? Are these photos just during a break and everyone is catching up on blogs/email/outside contact? Thank you StackOverflow-ers (StackOverflow-ites?)

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  • Java certification roadMap

    - by NoProblemBabe
    I am a .net programmer for sometime, and I was thinking about getting a Java certification, but unlike .Net, Java is a mystery to me. What are good certification books? What is the roadmap for the certifications? Is that the best path, or the only path? http://in.sun.com/training/certification/java/ Thank you very much

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  • How do Arrays work in C#?

    - by Slateboard
    I know that they are used to store data, but I have a difficult time understanding exactly how to use them in a program. In addition, I found this site with a tetris clone tutorial (the actual tutorial is missing). It uses arrays, but I can't really make sense of how it works. Here's an example of the code - public int[, ,] TShape = new int[4, 4, 2] { {{1, 0}, {0, 1}, {1, 1}, {2, 1}}, {{1, 0}, {0, 1}, {1, 1}, {1, 2}}, {{0, 0}, {1, 0}, {2, 0}, {1, 1}}, {{0, 0}, {0, 1}, {1, 1}, {0, 2}}}; Could it be that I'm looking too hard into this, or perhaps there's something I'm not grasping about it?

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  • What have you learned from your students?

    - by Helper Method
    It is said that a true master learns from his students. Since I'm tutoring at university, from time to time a question or a comment from the students I'm working with made me to see something from a different perspective, you get deeper insights, etc. So, what have you learned from your students/junior developers/... ?

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  • Minimum number of training examples for Find-S/Candidate Elimination algorithms?

    - by Rich
    Consider the instance space consisting of integer points in the x, y plane, where 0 = x, y = 10, and the set of hypotheses consisting of rectangles (i.e. being of the form (a = x = b, c = y = d), where 0 = a, b, c, d = 10). What is the smallest number of training examples one needs to provide so that the Find-S algorithm perfectly learns a particular target concept (e.g. (2 = x = 4, 6 = y = 9))? When can we say that the target concept is exactly learned in the case of the Find-S algorithm, and what is the optimal query strategy? I'd also like to know the answer w.r.t Candidate Elimination. Thanks in advance.

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  • What were the hot languages of 2009?

    - by geowa4
    It is well-accepted that we should all learn something new every six months. But what should should have topped the list for 2009? What new things should we learn have learned this year that appear to have real staying power? (Answers do not have to be limited to languages.)

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  • What are the hot languages of 2009?

    - by geowa4
    It is well-accepted that we should all learn something new every six months. But what should top the list for 2009? What new things should we learn this year that appear to have real staying power? (Answers do not have to be limited to languages.)

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  • wordpress.com to self-hosted wordpress blog

    - by sAc
    Hello, I have been writing articles on the wordpress.com blog, now i am looking to move it to self-hosted wordpress blog but i wonder: 1) Should i move all my articles on the new blog or just put an article on my last blog that more articles will be posted on my new blog? 2) If i move all articles on my new blog, i am not sure about how google will react to it because there are articles with good number of visitors, won't this be seo-un-friendly because i am not sure but google will re-create page reputation stuff, etc or those articles will have same popularity even if i move elsewhere? 3) What are the implications and side-effects in moving from wordpress.com blog to self-hosted wordpress blog? Thanks

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  • Is your test method self-validating ?

    - by mehfuzh
    Writing state of art unit tests that can validate your every part of the framework is challenging and interesting at the same time, its like becoming a samurai. One of the key concept in this is to keep our test synced all the time as underlying code changes and thus breaking them to the furthest unit as possible.  This also means, we should avoid  multiple conditions embedded in a single test. Let’s consider the following example of transfer funds. [Fact] public void ShouldAssertTranserFunds() {     var currencyService = Mock.Create<ICurrencyService>();     //// current rate     Mock.Arrange(() => currencyService.GetConversionRate("AUS", "CAD")).Returns(0.88f);       Account to = new Account { Currency = "AUS", Balance = 120 };     Account from = new Account { Currency = "CAD" };       AccountService accService = new AccountService(currencyService);       Assert.Throws<InvalidOperationException>(() => accService.TranferFunds(to, from, 200f));       accService.TranferFunds(to, from, 100f);       Assert.Equal(from.Balance, 88);     Assert.Equal(20, to.Balance); } At first look,  it seems ok but as you look more closely , it is actually doing two tasks in one test. At line# 10 it is trying to validate the exception for invalid fund transfer and finally it is asserting if the currency conversion is successfully made. Here, the name of the test itself is pretty vague. The first rule for writing unit test should always reflect to inner working of the target code, where just by looking at their names it is self explanatory. Having a obscure name for a test method not only increase the chances of cluttering the test code, but it also gives the opportunity to add multiple paths into it and eventually makes things messy as possible. I would rater have two test methods that explicitly describes its intent and are more self-validating. ShouldThrowExceptionForInvalidTransferOperation ShouldAssertTransferForExpectedConversionRate Having, this type of breakdown also helps us pin-point reported bugs easily rather wasting any time on debugging for something more general and can minimize confusion among team members. Finally, we should always make our test F.I.R.S.T ( Fast.Independent.Repeatable.Self-validating.Timely) [ Bob martin – Clean Code]. Only this will be enough to ensure, our test is as simple and clean as possible.   Hope that helps

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  • How Curiosity Took Its Self Portrait [Video]

    - by Jason Fitzpatrick
    There was enough confusion among the public as to how exactly the Curiosity Rover was able to photograph itself without the camera arm intruding into the photo that NASA released this video detailing the process. For those readers familiar with photograph blending and stitching using multiple photo sources, this should come as no surprise. For the unfamiliar, it’s an interesting look at how dozens of photos can be blended together so effectively that the arm–robotic or otherwise–of the photographer can be taken right out. Hit up the link below to read more about how NASA practiced on Earth for the shot and to see a high-res copy of the actual self portrait. Mars Rover Self-Portrait Shoot Uses Arm Choreography [NASA] Secure Yourself by Using Two-Step Verification on These 16 Web Services How to Fix a Stuck Pixel on an LCD Monitor How to Factory Reset Your Android Phone or Tablet When It Won’t Boot

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  • Self Documenting Code Vs. Commented Code

    - by Phill
    I had a search but didn't find what I was looking for, please feel free to link me if this question has already being asked. Earlier this month this post was made: http://net.tutsplus.com/tutorials/php/why-youre-a-bad-php-programmer/ Basically to sum it up, you're a bad programmer if you don't write comments. My personal opinion is that code should be descriptive and mostly not require comment's unless the code cannot be self describing. In the example given // Get the extension off the image filename $pieces = explode('.', $image_name); $extension = array_pop($pieces); The author said this code should be given a comment, my personal opinion is the code should be a function call that is descriptive: $extension = GetFileExtension($image_filename); However in the comments someone actually made just that suggestion: http://net.tutsplus.com/tutorials/php/why-youre-a-bad-php-programmer/comment-page-2/#comment-357130 The author responded by saying the commenter was "one of those people", i.e, a bad programmer. What are everyone elses views on Self Describing Code vs Commenting Code?

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  • Self-Service Testing Cloud Enables Improved Efficiency and Productivity for Development and Quality Assurance Organizations

    - by Sandra Cheevers
    With organizations spending as much as 50 percent of their QA time with non-test related activities like setting up hardware and deploying applications and test tools, the cloud will bring obvious benefits. Oracle announced today self-service testing capabilities to enable you to deploy private or public testing clouds. These capabilities help software development and QA organizations deliver higher quality applications, while enhancing testing efficiency and reducing duration of testing projects. This kind of cloud based self-service testing provides better efficiency and agility. The Testing-as-a-Service solution offers test lab management, automatic deployment of complex multi-tier applications, rich application performance monitoring, test data management and chargeback, all in a unified workflow. For more details, read the press release Oracle Announces Oracle Enterprise Manager 12c Testing-as-a-Service Solution here.

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  • Mixing self signed certs with traditional SSL

    - by brentonstrine
    I have a traditional SSL cert going to a subdomain secure.mydomain.com on my domain. My host required me to have a dedicated IP in order to do this. I would also like to use HTTPS on my site for when I log into WordPress, etc. and since this is just for me, I don't mind self signing it and clicking through the scary messages. Is there a way to use a self signed cert for mydomain.com/wp-admin (just for me) when I already am on a dedicated IP that already has a traditional SSL cert for normal users on secure.mydomain.com? (FWIW, I'm on WHM without root access.)

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  • Self-documenting code vs Javadocs?

    - by Andiaz
    Recently I've been working on refactoring parts of the code base I'm currently dealing with - not only to understand it better myself, but also to make it easier for others who are working on the code. I tend to lean on the side of thinking that self-documenting code is nice. I just think it's cleaner and if the code speaks for itself, well... That's great. On the other hand we have documentation such as javadocs. I like this as well, but there's a certain risk that comments here gets outdated (as well as comments in general of course). However, if they are up-to-date they can be extremely useful of say, understanding a complex algorithm. What are the best practices for this? Where do you draw the line between self-documenting code and javadocs?

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  • Now Available:Oracle Utilities Customer Self Service Version 2.1

    - by Roxana Babiciu
    The Oracle Utilities Global Business Unit is pleased to announce the general availability of Oracle Utilities Customer Self Service 2.1. It is ready for customers and partners to download and install via the Oracle Software Delivery Cloud. Key Features & Benefits: Oracle Utilities Customer Self Service 2.1 includes several new capabilities and enhancements including significantly improved Commercial Account Management and Advanced Notification Management using a new Oracle Utilities Notification Center module (licensed separately). These include the following: Advanced Notification Management Online Issues and Forms Management • Budget Management and Billing for Billed Budgets Prepaid User Dashboard Enhanced Usage Details Web Presentment Start/Stop/Transfer Service Automation Payment Arrangement Automation Account Sets Management for Large Commercial Customers Multiple Account Usage Data Aggregation, Comparison, and Data Download Multiple Account Financial History Mobile Outage Maps More information can be found on OPN

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  • How to learn ASP.NET MVC without learning ASP.NET Web forms

    - by Naif
    First of all, I am not a web developer but I can say that I understand in general the difference between PHP, ASP.NET, etc. I have played a little with ASP.NET and C# as well, however, I didn't continue the learning path. Now I'd like to learn ASP.NET MVC but there is no a book for a beginner in ASP.NET MVC so I had a look at the tutorials but it seems that I need to learn C# first and SQL Server and HTML, am I right? So please tell me how can I learn ASP.NET MVC directly (I mean without learning ASP.NET Web forms). What do I need to learn (You can assume that I am an absolute beginner). Update: It is true that i can find ASP.NET MVC tutorial that explain ASP.NET MVC, but I used to find ASP.NET web forms books that explain SQL and C# at the same time and take you step by step. In ASP.NET MVC I don't know how can I start! How can I learn SQL in its own and C# in its own and then combine them with ASP.NET MVC!

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