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  • Laser range finder, what language to use? Beginner advice

    - by DrOnline
    I hope this is the right place. I am a programming beginner, and I want to make a laser range finder, and I need advice about how to proceed etc. In a few weeks I will get a lot of dirt cheap 3-5V lasers and some cheap usb webcams. I will point the laser and webcam in parallel, and somehow use trigonometry and programming to determined distance. I have seen online that others made done it this way, I have purposefully not looked at the details too much because I want to develop it on my own, and learn, but I know the general outline. I have a general idea of how to proceed. The program loads in a picture from the webcam, and I dunno how images work really, but I imagine there is a format that is basically an array of RGB values.. is this right? I will load in the red values, and find the most red one. I know the height difference between the laser and the cam. I know the center dot in the image, I know the redmost dot. I'm sure there's some way to figure out some range there. TO THE POINT: 1) Is my reasoning sound thus far, especially in terms of image analysis? I don't need complete solutions, just general points 2) What I need to figure out, is what platform to use. I have an arduino... apparently, I've read it's too weak to process images. Read that online. I know some C I know some Python I have Matlab. Which is the best option? I do not need high sampling rates, I have not decided on whether it should be automated or whether I should make a GUI with a button to press for samples. I will keep it simple and expand I think. I also do not need it to be super accurate, I'm just having fun here. Advice!

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  • How to give life to my idea which belong to my company?

    - by pmod
    I wonder, what options do I have in the following situation. In the course of the several projects I realised the need in some auxilary software product (related to testing of the main products). I applied a creative approach to the matter and implemented a system which I think has a potential and looking promising (maybe not on the market but at least among some interested supporters). I have even more ideas related to this system and continue developing at my free and work time. It has become a work and hobby at the same time. Unfortunately, this work basically has nothing in common with the company's business and there is no way this will be organized in a form of standard development process and be presented to costumers as a product. What can you suggest in this situation? How to avoid breaching of contract? Have you had something similar in your career? What if my intention is to develop it as an open source project?

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  • Any idea of what to do with an old PC?

    - by phineas
    I got an old PC for free, similar to that one. Additionlly, I'm a hobbyist programmer who does mainly python and java under a linux (mostly ubuntu) development environment. And now I wonder what I could do with such a piece of crappy hardware and would be pleased to get a good answer. It's one thing if you code your app that could run on almost any pc (or webbrowser) but another if you got an own hardware platform which you could extend or more generally customize the way you like. What I would like to hear from you: Are you in a similar situation? Have you already done a project like that? What would be your ideas?

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  • How do I tell my parents that landing a job is what actually counts?

    - by shovonr
    On one side, I just want to get a degree with a 3.0 GPA. On the other side, my parents want more than just a 3. Now here's the thing. I program with a passion. I spend day and night programming. And I ace all my programming courses. However, I do terrible on all my elective courses -- such as writing, history, and all that stuff -- which only leaves me with a 3.1 to 3.2 GPA. And my parents want more. They think that university is like high school, where you need super-stellar grades to get to the next level. But they don't realize that good enough grades will land me a job. And they don't realize that a programmer needs to practice to become good at programming, and that having good skills is what will land a job in a nice software development company. Thankfully, though, they don't threaten to beat me with a baseball bat or anything like that. They just occasionally give me the little "tsk-tsk". But even that little "tsk-tsk" makes me feel guilty for opening up an IDE. And on top of that, I procrastinate because of that feeling of guilt. So now, I want to come clean with them. I want to know what's a good way to do that. [Edit] OK, so now, I realized, I should aim for higher grades, as some have suggested below.

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  • Errata of Expert Oracle Exadata Chinese Edition-???? Oracle Exadata ???

    - by Bandari Huang
    P10 ????CPU???Westmere??,?????AES??????,????????????????????? Because these CPUs are in the Westmere family, they have built in AES encryption support, which essentially provides a hardware assist to encryption and decryption. P39 ????????????,???????????????????????? particularly with the higher levels of compression, the decision was made to do the decompression on the storage servers.  

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  • Personal Cache vs Memcache?

    - by Kerry
    I have a personal caching class, which can be seen here ( based off WordPress' ): http://pastie.org/988427 I recently learned about memcache and it said to memcache EVERYTHING: http://highscalability.com/blog/2010/5/17/7-lessons-learned-while-building-reddit-to-270-million-page.html My first thought was just to keep my class with the current functions and make it use memcache instead -- is there any downside to doing this? The main difference I see is that memcache stays on with the server from page to page, while mine is for 1 page load. The problem I see arising, and this is with any system, is that they're dynamic. They change all the time. Whether its search results, visible products, etc. etc. If it's all cached, won't the create a problem? Is there a way to handle this? Obviously if something is bringing back the same results everytime it would be cached, but that's why I was doing it on a per page load basis. I'm sure there is a way to handle this, or is the cache time usually set between 5 minutes and an hour?

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  • What is your personal approach/take on commenting?

    - by Trae
    Duplicate What are your hard rules about commenting? A Developer I work with had some things to say about commenting that were interesting to me (see below). What is your personal approach/take on commenting? "I don't add comments to code unless its a simple heading or there's a platform-bug or a necessary work-around that isn't obvious. Code can change and comments may become misleading. Code should be self-documenting in its use of descriptive names and its logical organization - and its solutions should be the cleanest/simplest way to perform a given task. If a programmer can't tell what a program does by only reading the code, then he's not ready to alter it. Commenting tends to be a crutch for writing something complex or non-obvious - my goal is to always write clean and simple code." "I think there a few camps when it comes to commenting, the enterprisey-type who think they're writing an API and some grand code-library that will be used for generations to come, the craftsman-like programmer that thinks code says what it does clearer than a comment could, and novices that write verbose/unclear code so as to need to leave notes to themselves as to why they did something."

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  • Cases of companies taking IP rights of your own personal projects developed outside company time

    - by GSS
    Hi, I have heard of cases where a developer working for a company is also making his own personal projects in his own time, using his own equipment yet the company he works for tries to claim ownership for the project. I really find this annoying, and bang out of order. It should also be illegal. I am in this position (work for a company and working on my own systems - from small class libraries used to practise what I learn in my exam revision to a large commercial-scale system). While I don't know if the company will try to take ownership, all I know is they say they do not want a conflict of interest. Fair enough, my system is developed in my own time using my own equipment. They also say that work time should be for work only, which it is. Funny thing that as work is so boring, easy and slow that I have plenty of free time, which I wish I could spend on something productive - said system. The problem is, my company does not take hiring technical talent seriously. This is my first job, I am a junior coder (but my status/position doesn't really reflect what I can do), but I am the only developer. Likewise with the guy who controls Windows Server. As the contract does not say anything about taking ownership, I would assume they would. They would try to milk my success (I've made a good impression so I am sure they would). How can this be allowed? Are there any examples of this happening to any fellow Stacker here? It really makes my blood boil. What I find funny is that my company hardly has the expertise and resources to even be able to successfully run a project of my size. What I do at work is an ASP.NET application consisting of five pages, and even then there are flaws in the project. If I told them that they would also have to take responsibility for flaws in the project, then they would think twice! It's exactly because of this I save the best code for myself and at work I write rubbish code full of code smells. The company don't really care about error handling, as long as the business functionality works (ie a scheduled email sends, but there is no error handling). They'd think twice when they see the embarassment and business cost of a YSOD...

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  • Stock ticker symbol lookup API

    - by dancavallaro
    Is there any sort of API that just offers a simple symbol lookup service? i.e., input a company name and it will tell you the ticker symbol? I've tried just screen-scraping Google Finance, but after a little while it rate limits you and you have to enter a CAPTCHA. I'm trying to batch-lookup about 2000 ticker symbols. Any ideas?

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  • Financial applications on GPGPU

    - by CUDA-dev
    I want to know what sort of financial applications can be implemented using a GPGPU. I'm aware of Option pricing/ Stock price estimation using Monte Carlo simulation on GPGPU using CUDA. Can someone enumerate the various possibilities of utilizing GPGPU for any application in Finance domain,

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  • Masters in Computer Engineering

    - by Eliot
    How difficult would completing a masters in computer engineering without having an undergraduate engineering degree. Top program vs. middle of road make a difference? Finance/Accounting undergrad 4 core computer science classes (OOP foundations)

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  • Open currency exchange rate API thingy

    - by n00b
    The table is: currency_name exchange_rate USD 1.000000 EUR 1.194929 CAD 0.942142 etc. What I want is to make a simple little cron job Python script to run every couple hours and update these values in the database. Are there any open APIs? I mean I am like 99% sure Yahoo! or Google finance has something like this but cannot find. Maybe someone here has done this?

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  • Using R to Analyze Balance Sheets and Income Statements

    - by Ramnath
    I am interested in analyzing balance sheets and income statements using R. I have seen that there are R packages that pull information from Yahoo and Google Finance, but all the examples I have seen concern historical stock price information. Is there a way I can pull historical information from balance sheets and income statements using R?

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  • git for personal (one-man) projects. Overkill?

    - by Anto
    I know, and use, two version control systems: Subversion and git. Subversion, as of now, gets used for personal projects where I am the only developer and git gets used for open source projects and projects where I believe others will also work on the project. This is mostly because of git's amazing forking and merging capabilities, where everyone may work on their own branch; very handy. Now, I use Subversion for personal projects, as I think git makes little sense there. It seems to be a little bit of overkill. It is OK for me if it is centralized (on my home server, usually) when I am the only developer; I take regular backups anyway. I don't need the ability to make my own branch, the main branch is my branch. Yes, SVN has simple support for branching, but much more powerful support for it makes no sense, I think. Merging can be a pain with it, or at least from my little experience. Is there any good reason for me to use git on personal projects, or is it just simply overkill?

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  • Free web app that can be used to keep track of loans made to people (like Mint)

    - by ShaChris23
    Is there a web app that is: Free Behaves like Mint But allows me to keep track of money I loan or owe other people? I should be able to setup an "account" for each person that I loan out to, and be able to "check off" when the person returns me the money, etc. I should also be able to add notes to each transaction to help me remember what it was for. Would be even nicer if I can add transactions via text messaging, email, etc.

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  • OS X Money Management Software

    - by Ryan O
    I recently moved from Windows to a Mac, but I still have to keep Virtualbox and Windows installation on the machine to use Quicken. iBank looked promising, but I had problems importing my data from Quicken. I would switch to Mint if they would allow you to enter transactions manually, but the lack of that feature is a deal breaker. (I use Quicken primarily to track uncleared transactions, with the bonus of reporting on past spending.) Is there any other software I should try that will be able to import at least most of my old data from Quicken? Edit: For what it's worth, I never did find anything else. Quicken Essentials for Mac was released this year, but doesn't handle investments well from what I hear. I'm now on Quicken 2010 under XP running inside Virtualbox. It's not ideal, but it seems to be the only thing around right now that meets my needs.

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  • Is there a good Open Source alternative to the commercial software "Quicken"?

    - by Alex R
    I just need good solid double-entry / multi-account transactions with a variety of simple reports. I've previously used Quicken but their file and OS version compatibility issues are a nightmare. I need a software that will have a good chance of still opening the files I create today, several years from now. Quicken has failed me in this regard. So I figure anything that comes with source code is a safer bet.

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  • How to stay financially organized easily when running a small web development company

    - by jls33fsls
    So I'm a programmer and I run my own web development company. In the past I have been able to get away with just doing some simple number crunching at the end of each year to do my taxes, but my company has grown substantially over the last year, and now that I am sitting down to do my taxes it has become an absolute nightmare because none of my information is organized at all. I want to be abel to easily keep track of my monthly and yearly financial data for my company (I use a Mac), any suggestions?

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