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• HTML5 localStorage for assets (stylesheets, JavaScript, images etc)

  - by Sam

  To save both client download time and network usage, is it possible to use the localStorage feature of HTML5 to store contents of linked stylesheets, javascript files and binary data (e.g. images), rather than hitting the server each time? Would that just complicate things - since I assume you would have to add the linked asset via JavaScript rather than just a script or link element, breaking the page for those without JavaScript enabled)? Unless you can parse the content (using HEAD requested to check last modified date and other headers) before the browser downloads it. Or best just to stick with 304 Not Modified and eTag headers?

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• How to write a build script for a C++ project

  - by Paul

  I am developing a C++ application on Ubuntu. The application consists of several modules, each with its makefile. I want to have a customised command line build process that does the following: checks code out from a repository (for specified branch/tag) builds the app (release or debug as specified) logs any errors etc I am too lazy to learn Perl (I tried before, but cant seem to get my head around it). Are there any (preferably open source) tools anyone can suggest, or maybe a simpler scripting languuage - or do I really have to learn Perl?

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• How do I convert german dates to MySQL standard dates?

  - by Kebman

  I'm importing a CSV file with dotted german dates into a MySQL database. I want the dates in the CSV to automatically be formatted correctly to the correct data type fields used by MySQL. I'm using Sequel Pro for the import. I gather I'm supposed to use the STR_TO_DATE function, but I just can't wrap my head around how to use add value or expression. German date Here are the dates in the CSV file: DD.MM.YYYY e.g.: 28.01.1978 MySQL date Here is what I want to end up with in the database: YYYY-MM-DD e.g.: 1978-01-28 Any ideas?

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• Help me to explain the F# Matrix transpose function

  - by Kev

  There is a Matrix transpose function: let rec transpose = function | (_::_)::_ as M -> List.map List.head M :: transpose (List.map List.tail M) | _ -> [] [[1; 2; 3]; [4; 5; 6]; [7; 8; 9]] |> transpose |> printfn "%A" It works fine. What does ( _ :: _ ) :: _ mean? I don't understand the whole code! Who can explain it? Thank You!

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• What is the best way to prevent a webpage coded completely in HTML (no PHP or any server side langua

  - by racl101

  I thought by placing these two lines that it would prevent the page from being cached but this is not the case between the head tags: <meta http-equiv="pragma" content="no-cache" /> <meta http-equiv="cache-control" content="no-cache" /> As already mentioned this is on server that doesn't support PHP (or any server side language, well, that's not true, it has cgi-bin folder that supports perl scripts but I don't know perl and have no time to engage in it.) What else could I do to prevent the page from caching? It caches on Firefox and IE (and not so much in Chrome or Safari.)

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• Getting redefinition of View Controller pickerView:titleForRow:forComponent error

  - by pdenlinger

  Hi-- I'm working my way through the book Head First iPhone Development (O'Reilly). Am having trouble on page 68 with the following method and function; I get the error "redefinition of ViewController pickerView:titleForRow:forComponent error. Have checked the code for spaces; seems to be OK. Can you check the code and tell me what's wrong? Thank you. -(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent: (NSInteger)component{ switch (component) { case 0: return [activities objectAtIndex:row]; case 1: return [feelings objectAtIndex:row]; } return nil; }

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• Why don't hardware failures show up at the programming language level?

  - by Julian Cienfuegos

  I am wondering if anyone can give my a good answer, or at least point me in the direction of a good reference to the following question: How come I have never heard of a computer breaking in a very fundamental way? How come when I declare x to be a double it stays as a double? How come there is never a short circuit that robs it of some bytes and makes it an integer? Why do we have faith that when we initialize x to 10, there will never be a power surge that will cause it to become 11, or something similar? I think I need a better understanding of memory. Thanks, and please don't bash me over the head for such a simple/abstract question.

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• How to check that this event would occur after DOM is ready in jquery ?

  - by Rachel

  I want to get page_tag information from the page and want to make sure that DOM for this page is already ready before getting the page tag information. I am doing $(document).ready( { alert("test"); var page_tag : $("head meta[name='page_tag']").attr('content'); page_tag : (page_tag) ? page_tag : ''; } But it gives me errors, missing : after property id alert("Check if document is ready");\n Any suggestions on what could be the possible reasons for it or any other way of checking if the dom is ready or not before getting page_tag information.

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• Multiple Linked List in C

  - by LuckySlevin

  I have a problem about Linked Lists. I already know how to create structures and linked list. But now I have to create arbitrary number of linked list which are also be kept in another structure. Which means : struct list{int x, struct list *next; }; struct parent{int x, struct list *head, struct parent *next;} And after lists are created when i enter this input for example "123134 linked list should look like : 1 - 2 - 3 - 4 And for example 1 will contain 2-3 list inside of it, 3 will contain 1-4 list inside of it. I need a starting point and a spark from you. So how can i do this?

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• from JS to iphone dev - what's the best language to start with?

  - by Enkai

  I am a total beginner and would like to eventually learn to develop for the iphone. I have just done a beginner's CS course where the language we learned was JavaScript. We studied basic concepts like: variables, arrays, loops (for,while,if,if..else..), properties and functions. I'm wondering if I am starting in the right/wrong place by following this book: Learn C on the Mac by Dave Mark? I have read a few chapters and am finding it a bit hard to get my head around the way that C works, for example the way that Strings are printed seems overly complicated as compared to JS. Do you think that JS was the wrong language to start off with and would I be better to go from JS straight to Objective-C rather than to C? I have tried to read up on previous threads on the merits/demerits of learning C first but haven't found any that relate JS to learning C/Obj C/ Cocoa. Any advice appreciated as I am very new to this. Thanks

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• Active Scaffold + Ruby 2.3.5 not working

  - by rodrigoaronas

  Hello, I have an application with Rails 2.3.5. And Im trying to use AS latest version, I have used it previously but cant make it work here. I have my ingredient_categories Controller, where i put class Administration::IngredientCategoriesController < ApplicationController layout "default" active_scaffold :ingredient_categories end I have this set up on routes to be :active_scaffold=true I have a model also called ingredient_category, and in the views folder (inside administration/ingredient_categories, and /ingredient_categories) i have nothing as it is usual. And Im getting over and over again: Template is missing Missing template ingredient_categories/list.html in view path themes/aqueouslight:app/views I had an error before asking me for a list.erb, which I created and put <%= render :active_scaffold = 'ingredient_categories', :label = 'Categorias' % And now this error of the list.thml... Cant make it work! dont know whhy really... whould be SO simple and its burning my head now.. Thanks!

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• PHP: How to begin testing large, existing codebase, and test for regression on production site?

  - by anonymous coward

  I'm in charge of at least one large body of existing PHP code, that desperately needs tests, and as well I need some method of checking the production site for errors. I've been working with PHP for many years, but am unfortunately new to testing. (Sorry!). While writing tests for code that has predictable outcomes seems easy enough, I'm having trouble wrapping my head around just how I can test the live site, to ensure proper output. I know that in a test environment, I could set up the database in a known state... but are there proper methods or techniques for testing a live site? Where should I begin? [I am aware of PHPUnit and SimpleTest, but haven't chosen one over the other yet]

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• submit button on html to output result on same page

  - by amateur

  Hi, Although this seems like something very basic, but no matter what I tried I couldn't get my head around it. Basically I want a html form where a user types in their ID number in an input text box and when they hit the submit button it displays their email address which is their company ID number @ company.com, such as below <form action=""> ID Number: <input type="text" name="idnumber" /><br/> <input type="submit" value="Whats my email address" /> </form> <p>Your email address is 'idnumber'@email.com</p> Can this even be done using html or would I need to use Javascript or PHP for it? Thanks

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• jQuery: click function exlude children.

  - by superUntitled

  Trying to wrap my head around the jQuery ".not()" function, and running into a problem. I would like to have the parent div to be "clickable" but if a user clicks on a child element, the script is not called. $(this).not(children()).click(function(){ $(".example").fadeOut("fast"); }); the html: <div class="example"> <div> <p>This content is not affected by clicks.</p> </div> </div>

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• Using ANTLR with Left-Recursive Rules

  - by CNevin561

  Basically Ive written a Parse for a language with just basic arithmetic operators ( +, -, * / ) etc, but for the minus and plus cases, the Abstract Syntax Tree which is generated has parsed them as right associative when they need to be left associative. Having a googled for a solution, i found a tutorial that suggests rewriting the rule from: Expression ::= Expression <operator> Term | Term as Expression ::= Term <operator> Expression*. However in my head this seems to generate the tree the wrong way round. Any pointers on a way to resolve this issue?

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• Adding a javascript immediate after body tag

  - by prabdrup

  I am making a drupal module. My requirement in the module is that when the module is activated then it needs to add a javascript in page.tpl file just after the body tag. Can anyone help me how to do this. I have tried using drupal_add_js but it will not exactly put the script after body tag, rather puts inside the head or below in footer. I also tried using template variable and preprocess method but the problem is the preprocess method replaces the old value of that variable with the new one. Is there a way how i can implement this in.

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• Continuously reading from a stream in C#?

  - by Damien Wildfire

  I have a Stream object that occasionally gets some data on it, but at unpredictable intervals. Messages that appear on the Stream are well-defined and declare the size of their payload in advance (the size is a 16-bit integer contained in the first two bytes of each message). I'd like to have a StreamWatcher class which detects when the Stream has some data on it. Once it does, I'd like an event to be raised so that a subscribed StreamProcessor instance can process the new message. Can this be done with C# events without using Threads directly? It seems like it should be straightforward, but I can't get quite get my head around the right way to design this.

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• EF Linq Product Sum when no records returned

  - by user1622713

  I’ve seen variations of this question all over the place but none of the answers work for me. Most of them are just trying to sum a single column too – nothing more complex such as the sum of a product as below: public double Total { get { return _Context.Sales.Where(t => t.Quantity > 0) .DefaultIfEmpty() .Sum(t => t.Quantity * t.Price); } } If no rows are returned I want to return zero. However if no rows are returned the .Sum() fails. There are various options of trying to insert Convert.ToDouble and using null coalesce operators, but they all still gave me errors. I’m sure I am missing a simple way to do this – any help greatly appreciated after too long banging head against google brick wall!

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• How to retrieve base class only (entity framework)?

  - by Juvaly

  Hi All, I've been scratching my head here for a while now... I have a Consumer class and a BillableConsumer class that inherits Consumer. They are both a part of the Consumers set. The problem is that this following query: Consumer consumer = (from c in _ctx.Consumers where c.ID = id select c).First(); returns a BillableConsumer instance! Just the same as this query: BillableConsumer bconsumer = (from c in _ctx.Consumers.OfType<BillableConsumer>() where c.ID = id select c).First(); How can I return an instance of just the base class? (these are separate tables in the data store).

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• What is so great about Visual Studio?

  - by Paperflyer

  In my admittedly somewhat short time as programmer, I have used many development environments on many platforms. Most notably, Eclipse/Linux, XCode/OSX, CLI/editor/Linux, VisualDSP/Blackfin/Windows and MSVC/Windows. (I used each one for several months) There are neat features in pretty much all of them. But somehow, I just can't find any in MSVC. Then again, so many people really seem to like it, so I am probably missing something here. So please tell me: What is so great about Visual Studio? Things I like: Refactoring tools in Eclipse Build error highlighting in XCode and Eclipse Edit-all-in-Scope in XCode Profiler in XCode Flexibility of Eclipse and CLI/editor Data plotting in VisualDSP Things I don't like Build error display in MSVC (not highlighted in code) Honestly, this is not meant to be a rant. Of course I am a Mac-head and biased as hell, but I have to use MSVC on the job, so I really want to like it.

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• changing body class based on user's local time

  - by John

  I'm trying to add a body class of 'day' if it's 6am-5pm and 'night' if "else" based on the user's local time. I tried the following but it didn't work. Any ideas? In the head: <script> function setTimesStyles() { var currentTime = new Date().getHours(); if(currentTime > 5 && currentTime < 17) { document.body.className = 'day'; } else { document.body.className = 'night'; } } </script> In the body: <body onload="setTimeStyles();"> Also, is there a more elegant way to achieve what I need?

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• The way to deploy from repos in svn

  - by fatnjazzy

  Hi, we are 5 developers working in an svn environment. every programmer can work on small bugs and commit whenever he wants. after the work has done, i want to give them the way to deploy to the production without considering the other programmers and their deployment. for example: while i am committing, other user is committing too but he did not finish to commit. his revisions 1,3 my revisions 2,4 if i will deploy the HEAD(4), ill also deploy his work. and i will deploy 2 and 4 i will include his files as well. how can i free every programmer to deploy his files only? Thanks

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• Listing documents directory contents in UITableView

  - by user1493543

  So I've researched extensively on how to list the files in the documents directory in a table view and after much deliberation, came up with this code. Whenever I run this, the app crashes with EXEC_BAD_ACCESS. I've been busting my head for hours, so any help would be appreciated. All I'm doing is acquiring the files in the documents directory and trying to list them in a table view... Code is pasted in link below. http://pastie.org/4178767 Edit- App crashes in numberOfRowsInSection: method.

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• How can I get cmake to find my boost installation

  - by BD at Rivenhill

  I have installed the most recent version of boost in /usr/local (with includes in /usr/local/boost and libraries in /usr/local/lib/boost) and I am now attempting to install Wt from source, but cmake (version 2.6) can't seem to find the boost installation. It tries to give helpful suggestions about setting BOOST_DIR and Boost_LIBRARYDIR, but I haven't been able to get it to work by tweaking these variables. The most recent error message that I get is that it can't find the libraries, but it seems to indicate that it is using "/usr/local/include" for the include path, which isn't correct (and I can't seem to fix it). Does anybody have a solution for this off the top of their head, or do I need to go mucking around inside cmake to figure it out?

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• Set timeout on third-party file request with jQuery

  - by markedup

  I'm trying to integrate a script file hosted by a third party into a new web site. Currently, I'm adding a SCRIPT tag to the DOM for that third-party script file on document ready: $(document).ready( function() { var extScript = document.createElement('script'); extScript.type = 'text/javascript'; extScript.src = 'http://third-party.com/scriptfile.js'; $('head').append(extScript); }); function extScriptCallback() { $('#extWidgetContainer').show(); } But sometimes that third-party script file request times out or takes a long time to respond. So, for the sake of best practice, I want to provide alternative content if the external script takes longer than e.g. 10 seconds to load. How do I achieve this? I've looked at JavaScript's native setTimeout(), as well as jQuery's delay() function, but I'm not sure which I should use--or how. Grateful for any suggestions.

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