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  • Sharing rails fragments between formats

    - by Julian
    Hi I'm toying with mobile_fu and want to share some fragments between the different views. E.g. views/ item/ view.html.erb view.mobile.rb shared/ _common.erb In both view.html.erb and view.mobile.erb I want to share the same fragment '_common.erb' without having to specify the format (should you ever have to specify the format inside a fragment? It doesn't seem like The Rails Way?). Let's say for arguments's sake it's because it's in a helper or whatever -- the point is that I need to share fragments in a 'well-defined and Railsy way' across formats. Let's take this fairly innocuous snippet <% render :fragment => 'shared/common' %> I've tried 3 file name conventions: _common.html.erb only works for html /item/view/xx fails with 'shared/_common.erb not found') however _common.erb fails for html and works for mobile (maybe mobile_fu is doing something wacky?) -- same error as for .html.erb version above _common.rhtml does work for both I'm thinking that: that rhtml works for both is a legacy hack and I'm loathe to rename all the shared fragments .rhtml to get the behaviour I want. Any feedback gratefully welcome! Including 'you fundamentally don't understand how Rails works please RTFM here: http://....' :)

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  • select dropdown option by value using jquery

    - by user1765862
    I have select following html structure <select id="mainMenu" data-mini="true" name="select-choice-min"> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> <option value="6">6</option> </select> on page load I want initially set option with value 5 so I tried (but nothing changed) $(document).ready(function () { $('#mainMenu option').eq(5).prop('selected', true); }) I'm using jquery 1.8.3 and jqueyr mobile since this is mobile website <script src="/Scripts/jquery-1.8.3.js"></script> <script src="/Scripts/jquery.mobile-1.4.2.js"></script> UPDATE: I just realize that every code from posted answers works (as well as mine), #mainMenu option value is set to desired value (5) but it's text doesnt change (in any of this scenarios). Is this normal and is there workarround for this. I tried $("mainMenu").text("5");

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  • C++ : C++ Primer (Stanley Lipmann) or The C++ programming language (special edition)

    - by Kim
    I have a Computer Science degree (long2 time ago) .. I do know Java OOP but i am now trying to pick up C++. I do have C and of course data structure using C or pascal. I have started reading Bjarne Stroustrup book (The C++ Programming Language - Special Edition) but find it extremely difficult esp. some section which i don't have exposure such as Recursive Descent Parser (chapter 6). In terms of the language i don't foresee i have problem but i have problem as mentioned cos' those topic are usually covered in a Master Degree program such as construction of compiler. I just bought a book called C++ primer (Stanley Lipmann) which i heard it is a very good book for C++. Only setback is it's of course no match with the amount of information from the original C++ creator. Please advice. Thanks.

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  • Simple OCR programming tutorials/articles

    - by daddz
    I'm interested in simple OCR methods and algorithms. And with simple I mean simple! Best would be a tutorial/article/documentation without dependencies on 3rd party librarys if that's even possible. I would really like to build up my knowledge from the ground up. The programming language doesn't matter. Thanks in advance! Edit: An interesting link I found in another question: OCR and Neural Nets in JavaScript I especially like the python implemenation.

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  • libevent, windows and .NET programming

    - by Chris
    I experiment with a lot of open source software and I've noticed a fair amount of server type applications in the open source world use libevent to facilitate event-based processing rather than spawn multiple threads to handle requests. I also do a lot of .NET programming (it's my core job function), and I'm interested in learning how libevent relates to the .NET event model. Are events in .NET the equivalent of libevent for C programs? Should I try to learn libevent and attempt to use it in custom .NET server applications or is using the standard .NET event model basically the same thing?

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  • Is Objective C fast enough for DSP/audio programming

    - by morgancodes
    I've been making some progress with audio programming for iPhone. Now I'm doing some performance tuning, trying to see if I can squeeze more out of this little machine. Running Shark, I see that a significant part of my cpu power (16%) is getting eaten up by objc_msgSend. I understand I can speed this up somewhat by storing pointers to functions (IMP) rather than calling them using [object message] notation. But if I'm going to go through all this trouble, I wonder if I might just be better off using C++. Any thoughts on this?

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  • [Homework] Online programming editor

    - by VDVLeon
    Hi, For a school project i need to write or use a online programming editor. It is a part of a bigger project. I thought of a java application, php/html/javascript or flash. I have a couple of things i could do: Find a good working application and edit it so it works with the rest of the project Find good parts for a editor and make it working my self (syntax highlighter, auto-indent, autocompletion, etc.) Combination of those two Does anybody know a good editor or have tips for this project or a editor? Thanks for reading, Leon

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  • Is learning the Caché database hard coming from relational databases and object oriented programming

    - by Edelcom
    I am currently running the local version of Caché on my system in order to determine if I can (and will) take on a new possible project. The current project uses Delphi 7 as a front end calling a Caché dll where the business logic is stored in the database. I have a background of Sqlserver and Firebird (and before Access and Paradox) as databases. I use Delphi 7 for 95% of my Windows development, so I know about object programming. I would like to recieve opinions from persons having used Caché and either SqlServer, Firebird or Oracle and having developed in Delphi (or C++ or C# - an object oriented language). I have read the pro's and con's from other questions, but I am not asking for this, I need input from Caché developers. Thanks in advance.

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  • Preview label written in Eltron Programming Language EPL?

    - by Mrgreen
    I have code produced by our proprietry system in the Eltron Programming Language: This is sent to Eltron/Zebra label printers to be printed. Is there some kind of software that would allow me to interpret this code to do some form of 'print preview'? I am considering developing a way to convert this into an image or even postscript pdf, but I am struggling with how to do the barcodes (the lines starting in B is for barcodes). N Q296,24 R132,0 S2 D9 ZB A3,2,0,3,1,1,N,"RB10SS5" B3,22,0,2C,2,4,35,N,"391369840" A3,60,0,3,1,1,N,"391369840" A3,80,0,3,1,1,N,"Testing" A3,100,0,4,1,1,N,"Serology" A3,130,0,1,1,1,N,"SSTORE" A185,16,0,1,1,1,N,"17 Mar" A185,35,0,1,1,1,N,"SEROL" A185,51,0,1,1,1,N,"0.50" B400,208,0,2C,2,4,40,N,"391369840" A400,254,0,2,1,1,N,"391369840" P1

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  • graphics programming

    - by PVB
    hi , i would like to program some graphic figures such as line, circle,etc. i have used turboc++ 3.0 for dos graphics. i would like to do the same with the compilers dev c++ or code blocks or vc++. i would like to implement dda and bresenhems line and circle drawing algorithm. how should i go about implementing these programs through these compilers (not the command line tools). i have a really vague picture of graphics programming.please help.. thanks in advance. please note : i have a nvidia graphics card 1gb.. so i cannot use dos graphics (i think the card is the reason).

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  • 24 hours per day and freelance programming jobs

    - by Luca
    I'm working on stimulanting projects at my job. I like it. I like programming! I have accumulated several years of experience now. Sometime happens I develop other projects (even more stimulant of my main job). Some more money cannot hurts! The problem is that my free time has decreased a lot, leading me to develop until late evening. I usually program each day (I like to develop my own projects, even if only a few lines at a time). But it is one thing to plan for my pleasure, it is one thing to plan for business. So, my question is how to balance free time with these additional jobs? What experiences do you have? How much you can develop for long time (in a medium interval, say, weeks)? Every thought is welcome!

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  • C Socket Programming, problems with select() and fd_set

    - by wretrOvian
    Hello I'm learning my way about socket programming in C (referring to Beej). Here is a simple multi-user chat server i'm trying to implement: http://pastebin.com/gDzd0WqP On runtime, it gives Bus Error. It's coming from the lines 68-78. Help me trace the source of the problem? in fact, WHY is my code even REACHING that particular region? I've just run the server. no clients have connected.. :@ ps - i know my code is highly unreliable (no error checks anywhere), but i WILL do that at a later stage, i just want to TEST the functionality of the code before implementing it in all it's glory ;)

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  • Benefits of programming (doing) versus reading blogs (thinking?)

    - by Xian
    I have come to a conclusion or realization that perhaps many developers I know including myself have a fanatical fascination with reading as many programming and technology blogs or listening to podcasts as humanly possible. I sometimes wonder if this time would be much better spent in actual coding and doing, rather than the incessant thinking and perhaps wondering what the "other guy" is doing? With a very large signal to noise ratio in most blogs and podcasts, is there real benefit in maintaining a huge and constant blog role.. or is this some primal fear or instinct to keep up the pace unless being left behind? Can they simply be relegated to Google search and just-in-time learning? Edit: (There are some amazing answers here and touch a philosophical nerve with me, if you are reading this for the first time, I recommend taking the time reading through the answers below)

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  • Programming pattern to flatten deeply nested ajax callbacks?

    - by chiborg
    I've inherited JavaScript code where the success callback of an Ajax handler initiates another Ajax call where the success callback may or may not initiate another Ajax call. This leads to deeply nested anonymous functions. Maybe there is a clever programming pattern that avoids the deep-nesting and is more DRY. jQuery.extend(Application.Model.prototype, { process: function() { jQuery.ajax({ url:myurl1, dataType:'json', success:function(data) { // process data, then send it back jQuery.ajax({ url:myurl2, dataType:'json', success:function(data) { if(!data.ok) { jQuery.ajax({ url:myurl2, dataType:'json', success:mycallback }); } else { mycallback(data); } } }); } }); } });

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  • [Programming General] Advantages of using software framework

    - by ignatius
    Hello, I was reading these days about large projects implementation in python and Flex, and very often people praise the use of framework (like Cairngorm, PureMVC or others) over traditional OOP coding. I think i dont really understand the advantage of using FW, which is the strong point over classic programming? how big should be the project in order to use FW? it is intended mainly for web-applications? or can be used for desktop apps as well? hope, all these doubts dont sound stupid to you, i am not Computer engineer, just electronic, so my knowledge of sw architecture is very limited. Br

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  • Using socket API on IPhone

    - by dl3nar
    Hi, for a little project I have to do the following task on my IPhone: open a TCP socket send a command to the server shutdown the WRITE part of the connection read the response from the server close the connection I'm not experienced with socket programming - I've just started with network programming and I've already used the CFStream interface. But obviously streams are not adequate for this task. Who can point me in the right direction? I tried to find a tutorial on Apples website about sockets, but there is nothing. Regards, Thomas

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  • Good C# Networking Book

    - by Dan
    Hey guys I am looking for a good solid introduction book to the fundementals of network programming in C#. For example is have looked at this one http://www.amazon.com/C-Network-Programming-Richard-Blum/dp/0782141765/ref=pd_sim_b_5 but it is quite old now. Anyone used one recently, i would greatly appriciate it thanks dan

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  • What non-programming books should programmers read?

    - by Charles Roper
    This is a poll asking the Stackoverflow community what non-programming books they would recommend to fellow programmers. Please read the following before posting: Please post only ONE BOOK PER ANSWER. Please search for your recommendation on this page before posting (there are over NINE PAGES so it is advisable to check them all). Many books have already been suggested and we want to avoid duplicates. If you find your recommendation is already present, vote it up or add some commentary. Please elaborate on why you think a given book is worth reading from a programmer's perspective. This poll is now community editable, so you can edit this question or any of the answers. Note: this article is similar and contains other useful suggestions.

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  • Unix RPC programming

    - by Abhi
    Heyy all, I needed some help with ONC RPC programming. My task is to create two-tier client-server architecture wherein one main server (something like a directory) keeps a track of level-two servers and acts as a lookup; the level-two servers exposing some trivial functions, and finally, the clients for level-two servers. The clients ask the directory where a server is located, and then communicate with it. Using RPCGEN, we can create a pair of client-server code; however, the clients in this case need to have stubs for the directory as well as the level-two functions. Being a newbie to RPC, I'm having trouble conceptualizing the way I should code this. How can I call a function from a different server if a client is generated using a different IDL ? Any pointers would be appreciated :) Regards, Abhi

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  • Laws of Computer Science and Programming

    - by Jonas
    We have Amdahl's law that basically states that if your program is 10% sequential you can get a maximum 10x performance boost by parallelizing your application. Another one is Wadler's law which states that In any language design, the total time spent discussing a feature in this list is proportional to two raised to the power of its position. 0. Semantics 1. Syntax 2. Lexical syntax 3. Lexical syntax of comments My question is this: What are the most important (or at least significant / funny but true / sad but true) laws of Computer Science and programming? I want named laws, and not random theorems, So an answer should look something like Surname's (law|theorem|conjecture|corollary...) Please state the law in your answer, and not only a link. Edit: The name of the law does not need to contain it's inventors surname. But I do want to know who stated (and perhaps proved) the law

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  • how to extract only the 1st 2 bytes of NSString in Objective-C for iPhone programming

    - by suse
    Hello, 1) How to read the data from read stream in Objective-C, Below code would give me how many bytes are read from stream, but how to know what data is read from stream? CFIndex cf = CFReadStreameRead(Stream, buffer, length); 2) How to extract only the 1st 2bytes of NSString in Objective-C in iPhone programming. For Ex: If this is the string NSString *str = 017MacApp; 1st byte has 0 in it, and 2nd byte has 17 in it. how do i extract o and 17 into byte array? I know that the below code would give me back the byte array to int value. ((b[0] & 0xFF) << 8)+ (b[1] & 0xFF); but how to put 0 into b[0] and 17 into b[1]? plz help me to solve this.

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  • New functional languages

    - by AnnaR
    Functional programming has been around since at least 1958 (creation of Lisp), but is experiencing a renaissance now with old functional languages being dusted off and new functional languages being created. Which functional languages are there that are newly developed or are in the making? I realize that you can write purely functional programs in most high level languages, so with functional languages I imply languages that are specifically designed for functional programming such as F#. If you have links to tutorials, wikis or code examples I encourage you to add them to your answer!

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  • Programming tests: are they relevant?

    - by BlackVoid
    Do online programming tests have any value (except for providing an evidence to potential employers) in terms of evaluating your knowledge, or a they too broad or too narrow in general? For examples, brainbench.com and similar websites. From my experience I have never found myself scoring particularly high, although I have many years of commercial experience and is doing great at work. These tests mostly refer to things I have never worked with (WebForms or ADO .Net, who works with ADO .Net directly anyway?), yet these tests claim to be C# tests. If you were hiring a programmer, would you consider online tests as an evidence of real skill?

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  • C++ Primer (Stanley Lipmann) or The C++ programming language (special edition)

    - by Kim
    I have a Computer Science degree (long2 time ago) .. I do know Java OOP but i am now trying to pick up C++. I do have C and of course data structure using C or pascal. I have started reading Bjarne Stroustrup book (The C++ Programming Language - Special Edition) but find it extremely difficult esp. some section which i don't have exposure such as Recursive Descent Parser (chapter 6). In terms of the language i don't foresee i have problem but i have problem as mentioned cos' those topic are usually covered in a Master Degree program such as construction of compiler. I just bought a book called C++ primer (Stanley Lipmann) which i heard it is a very good book for C++. Only setback is it's of course no match with the amount of information from the original C++ creator. Please advice. Thanks.

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  • Game Programming - GUIs

    - by Spencer
    I've been coding for a while now and would like to start looking into programming games. I know the industry's standard language is C++, for 3D graphics the main choice is between Direct 3D and OpenGL, but what is the most widely used GUI framework? I'm currently on a Mac so if native Windows API is the answer, then what is the cross platform choice? To be clear, I'm not looking for people's favourites but simply what the common or standard game industry's choice is so that I can learn and familiarize myself with it. Thanks, Spencer

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