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  • Why are C, C++, and LISP so prevalent in embedded devices and robots?

    - by David
    It seems that the software language skills most sought for embedded devices and robots are C, C++, and LISP. Why haven't more recent languages made inroads into these applications? For example, Erlang would seem particularly well-suited to robotic applications, since it makes concurrent programming easier and allows hot swapping of code. Python would seem to be useful, if for no other reason than its support of multiple programming paradigms. I'm even surprised that Java hasn't made a foray into general robotic programming. I'm sure one argument would be, "Some newer languages are interpreted, not compiled" - implying that compiled languages are quicker and use fewer computational resources. Is this still the case, in a time when we can put a Java Virtual Machine on a cell phone or a SunSpot? (and isn't LISP interpreted anyway?)

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  • How to detect slow internet connections?

    - by Starx
    Currently, most of the popular websites, like google, yahoo detect if the user connection speed is slow and then give a option to load basic version of the website instead of the high end one. What are the methods available to detect slow internet connections? P.S. I think this is achieved through javascript, so I will tag it as a javascript question? However, I am looking for answers oriented more towards PHP, if this is also server related.

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  • Creating a custom format string in a dataGridView

    - by Andy
    I have a dataGridView whose dataSource is a dataTable. My problem is that I want certain columns to be displayed in Hex. I can get that far with using something like this: foreach (DataGridViewColumn c in grid.Columns) { if (DISPLAYED_IN_HEX.Contains(c.Name)) { c.DefaultCellStyle.Format = "X"; } } My issue though is that I want this hex value prepended with 0x so as not to confuse anyone that they are in hexidecimal form. The values in the dataTable are various integral types. I looked into creating a custom IFormatProvider, but I don't think my coding skills are up to that par yet. Any other possible solutions?

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  • trouble setting node['chef-client']['interval']

    - by atiniir
    I've searched many places and haven't get found the answer to this, I suspect I'm missing something either fundamental or basic (maybe both) I'm using the chef-client::windows_service recipe and trying to set the interval and can't seem to sort it out. I've tried at the role level with: { "defaults": { "chef_client": { "interval":15 } }, "overrides":{ } } and at the node level with: { "chef_client": { "interval":25 }, "tags":[] } but the interval on the node is still 1800 (default)

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  • How to keep up the interest in job?

    - by stranger
    Hi, I have been working as Software Developer for 6+ yrs. And I have worked from start ups to big companies. I always feel some elements missing in me and those are interest, passion etc. In short, I don't feel motivated while coming to work. This makes me think how my work-life balance will look like once I reach at more responsible positions. I don't want to change my field and I feel blessed as well but I think I am not working passionately for my learning, future growth, improvement, skills etc. Any pointers will be highly appreciated. Thx

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  • how to do new lines? [ textarea -> jquery -> p tag ]

    - by Haroldo
    I'm doing something very similar to the stackoverflow question preview only much more basic. user types in text area - keyup shows what they've typed in preview new lines aren't working $('input, textarea').keyup(function(){ var value = $this.attr('value').replace('\n', '<br />').replace('\r', '<br />'); $('p.preview').html(value); })

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  • iPhone SDK development obj-C vs interface builder

    - by Amy
    I'm new to the iOS platform. I'm not clear on the purpose of the interface builder. It looks like I can avoid using it entirely and just write all the code in objective c. am I right? is there anything that IB can do but obj-c cannot? It reminds me of visual basic 6.

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  • Size of an Array

    - by Florent
    Hi all ! I'm new in objective C and iphone and it's hard from me. How do you get the size of an NSarray ? ? ? and print it in the console using NSLog ? thanks now it's basic but hard for me.

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  • Authoritative Excel range syntax reference

    - by olefevre
    Sorry if this has been asked before but I can't find it. I am looking for an authoritative description of all valid strings that can be used as a reference, e.g., "A1:C5", "$A:$A", $A2" etc etc. That seems a pretty basic thing yet I've wasted hours trying to locate it. All I can find is a swamp of "helpful" examples but no reference.

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  • Custom Control for Line

    - by Hamid
    I want to design a custom Control for Line (vertical or horizontal line) basic usercontrol is rectangle and not suitable for line what s your idea about line control?

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  • Is return an operator or a function?

    - by eSKay
    This is too basic I think, but how do both of these work? return true; // 1 and return (true); // 2 Similar: sizeof, exit My guess: If return was a function, 1 would be erroneous. So, return should be a unary operator that can also take in brackets... pretty much like unary minus: -5 and -(5), both are okay. Is that what it is - a unary operator?

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  • jquery onclick for expanding text content on the right?

    - by Jon Snow
    Hi I am trying to achieve the same effect as it is on hover on my fiddle, I would like to use jquery click/toggle to expand the content instead of seeing it on hover I am trying the basic addClass with jquery/css but somehow it's breaking off and cannot figure it out how to work properly Would appreciate any help or advice on the following, thanks a lot in advance, here is the fiddle i created with the jquery I am using $(document).ready(function(){ $(".gamewrapper").click(function(){ $(".gamewrapper").addClass("expand"); }); }); Thanks

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  • Where to start when getting into web application development

    - by Aaron
    I am looking to get into web application development. I am an undergrad CS major with experience in programming desktop apps, but with only basic knowledge regarding how web apps work. Any suggestions of where to start? Javascript, php, perl, ruby, python? Should I look into frameworks like django, seaside, ruby on rails, etc at first or wait until I am more experienced to use those?

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  • What are your references/recommendation on .NET DVDs, books and online training?

    - by egyamado
    There are lots of training methods from different vendors to learn .NET technologies (i.e. books, DVDs, online training, etc.). All of them claim the same thing: that they are the best, their content is 100% guaranteed, makes their customers professional in no time, etc. It’s confusing and sometimes frustrating as well. I especially want a training resource (i.e. a course) to provide valuable content in short time. More importantly I feel they should do their job properly so as to avoid the customer feeling they've wasted time or money. What I should do when I evaluating training methods and resources to help further software development skills? What are your training sources? Do you have any recommendations?

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  • Template approach for a PHP application

    - by Industrial
    Hi everyone, We're in the middle of making a new e-commerce related PHP application and we have come to the point where we have started to think about how we should solve templating for our customers needs. What we would like to do is offer our customers the possibility of uploading/modifying templates to suit their company:s profile. The initial thought is that we shall not reinvent the wheel, so instead letting our customers upload their templates with FTP, so there will be basic HTML skills required. For those customers that want to modify/customize template and doesnt have the knowledge, we offer that service as well. I know that there's a number of issues to solve before this could be considered safe, like preventing XSS and writing scripts that check through each uploaded file for potential security threats and so on. Of course, there are some part that probably will be to complex for the customer to modify by themselves, so maybe this approach won't apply to all<< template files in the frontend application. But besides that, what would be a good way to handle this?

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  • C++ Typing and OOP child classes

    - by Zack
    I'm a bit confused: If I have a base class A, and a class B which extends A, can a variable of the type A hold a value of the type B and vice versa? If yes, why? Aren't they completely different even if B is derived from A? How about type-safety? If this is possible, what things do I have to mind when taking use of this? How would this work out in terms of performance? Note: Sorry if I asked too many questions, just ignore them and just look out for those "marked" with the list decoration dot :) Also, this is not my homework. I'm a hobby programmer and have skills in scripting languages with OOP, yet I'm relatively new to OOP typing in C++.

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  • Powerbuilder resources

    - by afilatun
    I'm recently working in a company where we use PowerBuilder extensively. The only documentation or resources we have access to is some basic course saying things like "Do A, then B and you'll get C". I was wondering if there is some better crash courses or tutorials for this language on the net or somewhere else which actually explain something instead of simply taking me by the hand.

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  • How to check if *number* is in a array

    - by Emil
    Pretty basic programming question, I know PHP have a function for it, but does the iPhone OS have one? I want to check if the current indexPath is a value in an array. PHP Example: <?php $indexPath = 3; $array = array("0", "1", "2", "3", "4"); if (in_array($indexPath, $array)) { // Do something } ?> Does anybody know how to do the same thing inthe iPhone OS?

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  • Programming introduction book

    - by Avi
    Hello there, I've offered an out-of-job girl to help her study programming (with an MCSD as the ultimate goal) - and she has no progrmming knowledge. The idea is that she'll study from books and I"ll help. Help- I need a gentle introduction to programming book, very easy, very practical, very hands-on and up to date. Optimally would be for the .Net 4.0 MS enviornment (C#,Visual Basic) but other alternaitves (Jave, Python etc.) are OK.

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  • Which programming paradigm or language open most your mind?

    - by Dom De Felice
    It is often said that some programming languages exist that once grasped can open your mind and change the way you write software. A sort of "software design enlightenment", we can say. I heard this about Lisp, Smalltalk, Haskell, pure functional programming in general.. What are your experiences about this? I know that the right language to use depends on your needs, but I would like to know the one that better improve your programming skills in general. What do you think would be the best language/paradigm to learn to end up being a better programmer in the long run?

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  • C# Retrieve Canon Specific EXIF Data

    - by dkpatt
    I have wrote an app that reads the basic EXIF data from an image via the PropertyItems exposed in .Net's System.Drawing.Image class. However, I cannot retrieve Canon specific EXIF data via these properties. How does one read this information? I know it exist in the file as Photoshop reads it.

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