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  • My app does not seem to find my button from the UI file

    - by Jason94
    What i did: create a project, edited the ui file with the designer tool, ran the project, everything is ok tried to add to my cppfile: connect( pushButton_bracketBegin, SIGNAL( clicked() ), this, SLOT( pushButton_bracketBeginAction() ) ); but i get the error "‘pushButton_bracketBegin’ was not declared in this scope". this is my first project in qt and it should be fairly simple i guess (but yet out of my grasp ) :) appreciate the help

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  • What's the best software development conventions document you have seen?

    - by Pavel Radzivilovsky
    Google C++ development conventions outlaw exceptions, RAII, RTTI and bans the default parameter in parseInt(number, radix=10). Qt API style guide is brilliant, but only covers interfaces. The Robert C. Martin series Clean Code has M104 galaxy on the cover, but it is 462 pages long and based on Java, with no simple "do this" digest. Assuming that it is important to synchronize style and best practices across the organization, what is the smartest, most pleasant and useful conventions document you have worked with?

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  • Ruby - print the variable name and then its value

    - by tyndall
    What is the best way to write a function (or something DSLish) that will allow me to write this code in Ruby. How would I construct the function write_pair? username = "tyndall" write_pair username # where write_pair username outputs username: tyndall Is it possible to do? Looking for the most simple way to do this.

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  • What's a good PHP Active Record library?

    - by Luca Matteis
    I've been using CodeIgniter for some quite time, and I've been extremely happy with its Active Record stuff. It's great to query the database with it. Recently I've started a new project and I can't use such a framework anymore. Is there a simple PHP Active Record library that does its job and gets out of the way (similar to CodeIgniter's version)?

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  • Get Properties from Member in Umbraco programmatically

    - by AyKarsi
    I thought this would be really simple but .. We've create a user and a member type with various properties When we try to access the properties via the member object we got nothing. //Member m is current User eg. Property s = m.getProperty("PreferdUserName"); is null m.getProperties has a count of Zero.. have we missed something obvious?

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  • Can someone explain/annotate this Ruby snippet with comments?

    - by Ronnie
    Could someone please add comments to this code? Or, alternatively, what would be the pseudocode equivalent of this Ruby code? It seems simple enough but I just don't know enough Ruby to convert this to PHP. data = Hash.new({}) mysql_results.each { |r| data[r['year']][r['week']] = r['count'] } (year_low..year_high).each do |year| (1..52).each do |week| puts "#{year} #{week} #{data[year][week]}" end end Any help whatsoever would be really appreciated. Thanks!

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  • Functional programming approach for Java's input/output streams

    - by Elazar Leibovich
    I'm using Java's DataInputStream with scala to parse some simple binary file (which is very bad exprerience due to the lack of unsigned types, even in scala, but that's a different story). However I find myself forced to use mutable data structure, since Java's streams are inherently state preserving entities. What's a good design to wrap Java's streams with nice functional data structure?

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  • dynamic, How to test if a property is available

    - by Miau
    Scenario is very simple somewhere in the code I have this dynamic myVariable = GetDataThatLooksVerySimilarButNotTheSame(); //how to do this? if (myVariable.MyProperty.Exists) //Do stuff So basically the question is how to check (avoiding exceptions) that a certain property is available in my dynamic variable. I could do GetType() but I d rather avoid that, I dont actually want to know the type of the object I want to know if a property (or method if that makes life easier) is available Any pointers? Cheers

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  • How to efficently build an interpreter (lexer+parser) in C?

    - by Rizo
    I'm trying to make a meta-language for writing markup code (such as xml and html) wich can be directly embedded into C/C++ code. Here is a simple sample written in this language, I call it WDI (Web Development Interface): /* * Simple wdi/html sample source code */ #include <mySite> string name = "myName"; string toCapital(string str); html { head { title { mySiteTitle; } link(rel="stylesheet", href="style.css"); } body(id="default") { // Page content wrapper div(id="wrapper", class="some_class") { h1 { "Hello, " + toCapital(name) + "!"; } // Lists post ul(id="post_list") { for(post in posts) { li { a(href=post.getID()) { post.tilte; } } } } } } } Basically it is a C source with a user-friendly interface for html. As you can see the traditional tag-based style is substituted by C-like, with blocks delimited by curly braces. I need to build an interpreter to translate this code to html and posteriorly insert it into C, so that it can be compiled. The C part stays intact. Inside the wdi source it is not necessary to use prints, every return statement will be used for output (in printf function). The program's output will be clean html code. So, for example a heading 1 tag would be transformed like this: h1 { "Hello, " + toCapital(name) + "!"; } // would become: printf("<h1>Hello, %s!</h1>", toCapital(name)); My main goal is to create an interpreter to translate wdi source to html like this: tag(attributes) {content} = <tag attributes>content</tag> Secondly, html code returned by the interpreter has to be inserted into C code with printfs. Variables and functions that occur inside wdi should also be sorted in order to use them as printf parameters (the case of toCapital(name) in sample source). I am searching for efficient (I want to create a fast parser) way to create a lexer and parser for wdi. Already tried flex and bison, but as I am not sure if they are the best tools. Are there any good alternatives? What is the best way to create such an interpreter? Can you advise some brief literature on this issue?

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  • SharePoint Add New Item Button on Home Page

    - by ifunky
    I'm building a bulletin board site (in 2010) and I'm sure this must be simple but again it doesn't seem so. Anyway on my default page I have a query webpart showing the latest items and what I need is just a button at the top of the page "Add new item" which would show the popup and allow users to complete the form just like it works on the display list items form. I've looked at AllItems.aspx but can't even see the "Add new item" button to copy! Any ideas? Thanks Dan

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  • Parsing JSON object in JQuery

    - by koby
    Hi, I have simple JSON object returned in form {"d":"{\"Name\":\"DMX100\",\"Description\":\"blah blah\",\"ID\":\" 780\",\"Make\":\"2010\"}"} How do I parse it in success. success: function(msg) { $('#something').html(msg.d.Name); } Above code doesnt display Name but when I pass $('#something').html(msg.d); it shows complete Json string. How do I reach to individual properties Thanks

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  • emacs, override indentation

    - by aaa
    hi. Hopefully simple question: I have multiply nested namespace: namespace first {namespace second {namespace third { // emacs indents three times // I want to intend here } } } so emacs indents to the third position. However I just want a single indentation. Is it possible to accomplish this effect simply? Thanks

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  • Implementing the procducer-consumer with .NET 4.0 new

    - by bitbonk
    With alle the new paralell programming features in .NET 4.0, what would be a a simple and fast way to implement the producer-consumer pattern (where at least one thread is producing and enqueuing task items and one other thread executes (dequeues) these tasks). Can we benfit from all these new APIs? What is your preferred implementation of this pattern?

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  • Basic Scolling Question

    - by localgamer
    Hey guys, im pretty new to android platform and have a really simple question. Im putting buttons as layouts with text boxes, but im running out of room. How would i make it possible for the user to scroll down to view more buttons and stuff. For example, if i have 6 buttons, and 3 are in the field of view, i wanna be able to scroll with my finger and be able to see those buttons as I scroll. Thanks for the help guys -Localgamer

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  • Get source of some http url with javascript

    - by neon
    Please, I have another simple question for experienced programmers. Is it possible to get source code of any webpage with javascript at client side? With AJAX maybe? But I need that the server I am downloading the url from does see the IP of the client.. with AJAX it will show my script server IP, right? Thank you in advance.

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  • .Net 4.0 Memory-Mapped Files verses RDMS Storage

    - by Harry
    I'm interested in people's thoughts comparing storing data in a traditional SQL based Database or utilising a Memory-Mapped File such as the one in the new .Net 4.0 runtime. The data in question would be arrays of simple structures. Obvious pros and cons: SQL Database Pros Adhoc query support SQL Management Tools Schema changes (adding more columns and setting default values) Memory-Mapped Pros Lighter overhead? (this is an assumption on my part) Shareable between process threads Any others? Is it worth it for performance gains?

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  • What is the 'order' of a perceptron

    - by Martin
    A few simple marks for those who know the answer. I'm doing revision for exams at the moment and one of the past questions is: What is meant by the order of a perceptron? I can't find any information about this in my lecture notes, and even google seems at a loss. My guess is that the order is the number of layers in a neural network, but this doesn't seem quite right.

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  • GROUP BY a date, with ordering by date.

    - by standard
    Take this simple query: SELECT DATE_FORMAT(someDate, '%y-%m-%d') as formattedDay FROM someTable GROUP BY formatterDay This will select rows from a table with only 1 row per date. How do I ensure that the row selected per date is the earliest for that date, without doing an ordered subquery in the FROM? Cheers

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