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• Jumping around to work on different features when you get stuck, is it a source of project failures?

  - by codecompleting

  On personal projects (or work), if one gets stuck on a problem, or waiting to figure out a solution to the problem, if you jump to another section of your code, don't you think it will be a good reason your application will be buggy or worse yet never get completed? Assuming you are not using git and code each feature to a specific branch, things can get out of hand since you have 3 different features you are working on, and you have unresolved issues in each. So when you get done to work, you get stressed out because you have these hanging issues and half-baked code lingering about. What's the best way to avoid this problem? (if you have it) I'm guessing using something like git and creating a branch per feature is the safest way to avoid this bad habit. Any other suggestions?

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• Is it OK to mix C and C++ in an interview?

  - by John Pell

  If I am asked in an interview to write down some code, should I completely stick with C++ or is it acceptable to "mix" the two to write easy code as it comes to my mind? I'll explain it: if I'm asked to create a "stack" data type, a C++ class is perfectly suited, while if I need to parse some strings a strtok/sscanf is far easier than STL. On the other hand, if I need a generic container STL and templates are the way to go. Everything can be done in C or in C++, but in an interview I can't code everything or remember every standard/STL function. What is an acceptable tradeoff?

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• Android Java: Way to effectively pause system time while debugging?

  - by TheMaster42

  In my project, I call nanoTime and use that to get a deltaTime which I pass to my entities and animations. However, while debugging (for example, stepping through my code), the system time on my phone is happily chugging along, so it's impossible to look at, say, two sequential frames of data in the debugger (since by the time I'm done looking at the first frame, the system time has continued to move ahead by seconds or even minutes). Is there a programming practice or method to pause the system clock (or a way for my code to intercept and fake my deltaTime) whenever I pause execution from the debugger? Additional Information: I'm using Eclipse Classic with the ADT plugin and a Samsung SII, coding in Java. My code invoking nanoTime: http://pastebin.com/0ZciyBtN I do all display via a Canvas object (2D sprites and animations).

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• How much data validation is too much? [closed]

  - by adbertram

  Possible Duplicate: Data input validation - Where? How much? I'm a new PHP developer and am into Powershell quite a bit but this question is language agnostic. I've been questioning my code quite a bit lately thinking about how many nets I should setup to catch exceptions, verify results, etc. I realize that I could go crazy trying to verify each and every line of code but at the same time I want the code as resilient as possible. I'm not talking about user input but verifying output from methods. Is there some standard or rule of thumb to go by when deciding when and where to do data validation?

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• VB 2010 LOGIN 3-TIMES LOOP [migrated]

  - by stargaze07

  How to put a loop on my log in code it's like the program will end if the user inputs a wrong password/username for the third time? At this point I'm having a hard time putting the loop code. This is my LogIn Code in VB 2010 Private Sub btnLogIn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLogIn.Click Me.Refresh() Dim login = Me.TblUserTableAdapter1.UsernamePasswordString(txtUser.Text, txtPass.Text) If login Is Nothing Then MessageBox.Show("Incorrect login details", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error) Else Dim ok As DialogResult ok = MessageBox.Show("Login Successful", "Dantiña's Catering Maintenance System", MessageBoxButtons.OK, MessageBoxIcon.Information) MMenu.Show() MMenu.lblName.Text = "Welcome " & Me.txtUser.Text & " !" If txtPass.Text <> "admin" Then MMenu.Button1.Enabled = False ProdMaintenance.GroupBox1.Visible = True MMenu.Button2.Enabled = True MMenu.Button3.Enabled = True MMenu.Button4.Enabled = True Else MMenu.Button1.Enabled = True ProdMaintenance.GroupBox1.Visible = True MMenu.Button2.Enabled = True MMenu.Button3.Enabled = True MMenu.Button4.Enabled = True End If Me.Refresh() Me.Hide() End If End Sub

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• Is backing up a MySQL database in GIT a good idea?

  - by wobbily_col

  I am trying to improve the backup situation for my application. I have a Django application and MySQL database. I read an article suggesting backing up the database in Git. On the one hand I like it, as it will keep a copy of the data and the code in synch. But GIT is a designed for code, not for data. As such it will be doing a lot of extra work diffing the mysql dump every commit, which is not really necessary. If I compress the file before storing it, will git diff the files? (The dump file is currently 100MB uncompressed, 5.7Mb when bzipped). Edit: the code and database schema definitions are already in GIT, it is really the data I am concerned about backing up now.

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• Exclude PHP from output from WYSIWYG in CMS

  - by bytewalls

  I'm writing a basic CMS for one of my sites and have run into an issue where some pages need to dynamically serve PHP and JS, where as others are plain HTMl. I want there to be a setting which will allow this for the pages that need it and will load ACE editor instead of a different wysiwyg editor. The challenge here is that on the pages which I do not explicitly tell it there will be code, I want to reject any inputs that code. I can set it up to insert a for all pages without JS, but how can I keep php code from running?

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• php request youtube video is not working [closed]

  - by m3tsys

  what is wrong to this code? header('Content-type: application/x-shockwave-flash'); $video_id = $_REQUEST['id']; $content = readfile("http://www.youtube.com/watch?v=$video_id"); echo $content; or header('Content-type: application/x-shockwave-flash'); $video_id = $_REQUEST['id']; $content = readfile("http://localhost/embed/player.swf?file=http://www.youtube.com/watch?v=$video_id"); echo $content; Why this code is not working? How should look the code?

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• jQuery Mobile Frame Forwarding [on hold]

  - by Nizam

  I have a site that does a standard forward to another site [301 Redirect]. In the redirected site, I detect if the device is a mobile using the following code: if (/Android|webOS|iPhone|iPad|iPod|BlackBerry/i.test(navigator.userAgent)) { window.location.replace("Mobile/Login/Login.aspx") } else { window.location.replace("Apps/Login/Login.aspx") } It works and jQuery mobile makes the site fits device very well. To do so, I use the following code in ASPX page: <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1" /> The problem is that I am wanting to frame forward - instead of standard forward - (there are a lot of advantages), but the site is not fitted for the device anymore, and even the icon I have chosen for my page is not well defined anymore. The code I use to set the icon of page is: <link rel="apple-touch-icon" href="../../Apps/Imagens/Icone.png" /> My site is hosted by Mochahost My question is: Is there anything I could do to make it works?

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• What methodology to use for planning/developing a Language conversion project?

  - by user 123

  I am trying to help my friend by creating a part of his on-going project. What I'm going to do is create a Java parser to break up the Java code into operators, parameters etc to build XML representation. Next I want to create a code generator to convert the parsed java code to XML conforming to the schema I've created. Finally I want to use an XML style-sheet to transform the XML into another programming language type. Basically I just wanted some advice on which methodology/model I should use for planning and developing this project. Is there some benefit to using Agile etc for instance?

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• Good way to extract strings to resource

  - by Bart Friederichs

  I am using Visual Studio 2010 and we just decided to get started on localization of our code. We want to use the per-form resource file in combination with a separate resource file for static strings, called strings.resx. I was wondering if there is a good way to extra static strings (we already have quite some code we need to translate) to the strings.resx file? I have tried this plugin: Resource Refactoring 2010, but it doesn't work completely. It creates the correct new resource, but the strings aren't refactored in the code. Also, the tool seems to be abandoned by its developer. Is there a good plugin that can do this?

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• for vs. foreach vs. LINQ

  - by beccoblu

  When I write code in Visual Studio, ReSharper (God bless it!) often suggests me to change my old-school for loop in the more compact foreach form. And often, when I accept this change, ReSharper goes a step forward, and suggests me to change it again, in a shiny LINQ form. So, I wonder: are there some real advantages, in these improvements? In pretty simple code execution, I cannot see any speed boost (obviously), but I can see the code becoming less and less readable... So I wonder: is it worth it?

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• Application of LGPL license on a simple algorithm

  - by georgesl

  The "scope" of the GNU license is troubling me : I know it has been answered many times ( here, here, ... ) but shouldn't we take into consideration the complexity and originality of a code before using GPL license ? I explain : I'm working on a pet project using the DTW algorithm that I have written in C using the pseudo-code given on the wikipedia page . At one point I decided to change it for a C++ implementation ( just for hone my c++ skill ) . After doing so, I've looked for an existing implementation on the web, to compare the "cleanliness" of it, and I found this one : Vectored DTW implementation, which is part of limproved, a C++ library licensed under GPL v3 . Personnally, I don't mind the GNU license because it is a personnal project, which will never led to any kind of commercial purpose, but I wonder if this implementation can abide a company using it to open their code ( and other FOSS permissions ). Theoretically, I think it can ( I may be wrong :p ), but the algorithm in question is so simple (and old) that it should not.

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• design for interruptable operations

  - by tpaksu

  I couldn't find a better topic but here it is; 1) When user clicks a button, code starts t work, 2) When another button is clicked, it would stop doing whatever it does and start to run the second button's code, 3) Or with not user interaction, an electrical power down detected from a connected device, so our software would cancel the current event and start doing the power down procedure. How is this design mostly applied to code? I mean "stop what you are doing" part? If you would say events, event handlers etc. how do you bind a condition to the event? and how do you tell the program without using laddered if's to end it's process? method1(); if (powerdown) return; method2(); if (powerdown) return; etc.

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• Content of AUTHORS file

  - by user14284

  GNU recommend make AUTHORS file for list of authors and contributos of a program. But how many "levels" of authors and contributors should contain the file? E.g. I write a program foo, that actively use some library. Should I include authors of the library in the AUTHORS? It seems to yes, because total code of foo contain code from library. But if yes, I should include also authors of all others libraries, including standard libraries of compiler, authors of the compiler and other tools for producing final executable code, authors of OS... When I should stop?

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• Buy ReSharper 6 - Get Version 7 Free!?

  - by TATWORTH

  A tip that has just been passed to me by my good friends at Jet Brains.JetBrains ReSharper is approaching its new major release later this summer. We're delighted to announce a limited 2-in-1 offer: all new and upgrade ReSharper 6 licenses purchased on or after June 1, 2012, are entitled to a free upgrade for the upcoming ReSharper 7. Below is a list of features and improvements that will be included in ReSharper 7: Visual Studio 2012 Release Candidate support. Visual Studio 2012 RTM support will be provided as soon as it is available.Continued support for Visual Studio 2005, 2008 and 2010.Support for Windows 8 and for developing the new trend of Metro style applications.New code inspections and quick-fixes for different languages, including C# and VB.NET.Multiple JavaScript support improvements.Enhanced XAML development support pack.More ReSharper functionality for SharePoint, ASP.NET 4.5, ASP.NET MVC 4, and Silverlight 5.Unit testing improvements, including support for MSTest 11, NUnit 2.6, Jasmine and PhantomJS.Compatibility with dark schemes in Visual Studio 2010 and 12, and overall support for custom themes.More improvements in quick-fixes, code annotations, code hierarchy views, and refactorings. Enjoy ReSharper 7 free, when you upgrade to ReSharper 6 or buy new licenses now.

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• How to solve programming problems using logic? [closed]

  - by md nth

  I know these principles: Define the constrains and operations,eg constrains are the rules that you cant pass and what you want determined by the end goal, operations are actions you can do, "choices" . Buy some time by solving easy and solvable piece. Halving the difficulty by dividing the project into small goals and blocks. The more blocks you create the more hinges you have. Analogies which means : using other code blocks, yours or from other programmers . which has problem similar to the current problem. Experiments not guessing by writing "predicted end" code, in other word creating a hypothesis, about what will happen if you do this or that. Use your tools first, don't begin with a unknown code first. By making small goals you ll not get frustrated. Start from smallest problem. Are there other principles?

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• Difficult to replicate objects (object Customer) on the list? [migrated]

  - by gandolf

  I wrote a program that does work with files like delete and update, store, and search And all customers But I have a problem with the method is LoadAll Once the data are read from the file and then Deserialize the object becomes But when I want to save the list of objects in the list are repeated. How can I prevent the duplication in this code? var customerStr = File.ReadAllLines (address); The code is written in CustomerDataAccess class DataAccess Layer. Project File The main problem with the method LoadAll Code: public ICollection<Customer> LoadAll() { var alldata = File.ReadAllLines(address); List<Customer> lst = new List<Customer>(); foreach (var s in alldata) { var objCustomer = customerSerializer.Deserialize(s); lst.Add(objCustomer); } return lst; }

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• Managing a file-based public maven repository

  - by Roland Ewald

  I am looking for an easy way to manage a public file-based Maven repository. While we are using the open-source version of Artifactory internally, we now want to put a file-based repository of our published artifacts (and their dependencies) on a separate machine that is publicly available. There are several ways how to do this, but none of them seems ideal: Use Maven Dependency plugin: if it is configured correctly and executed with the goal dependency:copy-dependencies for the release-module of our project, it creates a local repository structure that is fine, but this structure does not contain the meta-data.xml files, nor the hash-sums. Use Artifactory to export repo: AFAIK Artifactory only allows to export a repository as a whole. This would include the non-published modules from our project (which would then need to be deleted manually). Also, all dependencies are sitting in another repository, so this needs to be done twice, and many dependencies are not even required by a published artifact (only by artifacts that are still for internal use only). Nevertheless, this method would also include the meta-data.xml files and the hash-sums for all files. To set up an initial version of the repository, I used a mixture of both methods: I first created the Maven repository for all required dependencies via dependency:copy-dependencies and then wrote a script to cherry-pick the meta-data.xml files (etc.) from Artifactory. This is terribly cumbersome, isn't there a better way to solve this? Maybe there is another Maven 3 - plugin that I am unaware of, or some other command-line tool that does the job? I basically just need a simple way to create a Maven repository that contains all artifacts a given artifact depends on (and no more), and also contains all meta-data expected in a remote repository. Any ideas?

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• OS X, Mercurial and MediaTemple problem

  - by bschaeffer

  I've installed Mercurial per MT's knowledge base file here. Working with it server side using ssh from my Mac works fine. I can initialize repositories and the like, but pulling from the server or pushing from my Mac produces an error I don't understand. Here's what I get when call hg push from my local installation (hash marks represent my server number): remote: Traceback (most recent call last): remote: File "/home/#####/users/.home/data/mercurial-1.5/hg", line 27, in ? remote: mercurial.dispatch.run() remote: File "/nfs/c05/h01/mnt/#####/data/mercurial-1.5/mercurial/dispatch.py", line 16, in run remote: sys.exit(dispatch(sys.argv[1:])) remote: File "/nfs/c05/h01/mnt/#####/data/mercurial-1.5/mercurial/dispatch.py", line 21, in dispatch remote: u = _ui.ui() remote: File "/nfs/c05/h01/mnt/#####/data/mercurial-1.5/mercurial/ui.py", line 38, in __init__ remote: for f in util.rcpath(): remote: File "/nfs/c05/h01/mnt/#####/data/mercurial-1.5/mercurial/util.py", line 1200, in rcpath remote: _rcpath = os_rcpath() remote: File "/nfs/c05/h01/mnt/#####/data/mercurial-1.5/mercurial/util.py", line 1174, in os_rcpath remote: path = system_rcpath() remote: File "/nfs/c05/h01/mnt/#####/data/mercurial-1.5/mercurial/posix.py", line 41, in system_rcpath remote: path.extend(rcfiles(os.path.dirname(sys.argv[0]) + remote: File "/nfs/c05/h01/mnt/#####/data/mercurial-1.5/mercurial/posix.py", line 30, in rcfiles remote: rcs.extend([os.path.join(rcdir, f) remote: File "/nfs/c05/h01/mnt/#####/data/mercurial-1.5/mercurial/demandimport.py", line 75, in __getattribute__ remote: self._load() remote: File "/nfs/c05/h01/mnt/#####/data/mercurial-1.5/mercurial/demandimport.py", line 47, in _load remote: mod = _origimport(head, globals, locals) remote: ImportError: No module named osutil abort: no suitable response from remote hg! Mercurial on my Mac is configured as follows [ui] username = John Smith editor = te -w remotecmd = ~/data/mercurial-1.5/hg My local single repo is configured as follows (hash marks represent my server number): [paths] default = ssh://mysite.com@s#####.gridserver.com/domains/mysite.com/html Mercurial on the server is configured with a just a username: [ui] username = John Smith The server .bash_profile is configured as follows (per the installation guide): # Aliases alias ls-a='ls -a -l' # Added this as suggested by the MediaTemple guide export PYTHONPATH=${HOME}/lib/python:$PYTHONPATH export PATH=${HOME}/bin:$PATH I understand this probably isn't a MediaTemple problem, but more likely an installation problem. I would really appreciate any assitance on this problem. Thanks in advance!

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• How to prevent duplicate records being inserted with SqlBulkCopy when there is no primary key

  - by kscott

  I receive a daily XML file that contains thousands of records, each being a business transaction that I need to store in an internal database for use in reporting and billing. I was under the impression that each day's file contained only unique records, but have discovered that my definition of unique is not exactly the same as the provider's. The current application that imports this data is a C#.Net 3.5 console application, it does so using SqlBulkCopy into a MS SQL Server 2008 database table where the columns exactly match the structure of the XML records. Each record has just over 100 fields, and there is no natural key in the data, or rather the fields I can come up with making sense as a composite key end up also having to allow nulls. Currently the table has several indexes, but no primary key. Basically the entire row needs to be unique. If one field is different, it is valid enough to be inserted. I looked at creating an MD5 hash of the entire row, inserting that into the database and using a constraint to prevent SqlBulkCopy from inserting the row,but I don't see how to get the MD5 Hash into the BulkCopy operation and I'm not sure if the whole operation would fail and roll back if any one record failed, or if it would continue. The file contains a very large number of records, going row by row in the XML, querying the database for a record that matches all fields, and then deciding to insert is really the only way I can see being able to do this. I was just hoping not to have to rewrite the application entirely, and the bulk copy operation is so much faster. Does anyone know of a way to use SqlBulkCopy while preventing duplicate rows, without a primary key? Or any suggestion for a different way to do this?

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• c# How to Verify Signature, Loading PUBLIC KEY From PEM file?

  - by bbirtle

  I'm posting this in the hope it saves somebody else the hours I lost on this really stupid problem involving converting formats of public keys. If anybody sees a simpler solution or a problem, please let me know! The eCommerce system I'm using sends me some data along with a signature. They also give me their public key in .pem format. The .pem file looks like this: -----BEGIN PUBLIC KEY----- MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDe+hkicNP7ROHUssGNtHwiT2Ew HFrSk/qwrcq8v5metRtTTFPE/nmzSkRnTs3GMpi57rBdxBBJW5W9cpNyGUh0jNXc VrOSClpD5Ri2hER/GcNrxVRP7RlWOqB1C03q4QYmwjHZ+zlM4OUhCCAtSWflB4wC Ka1g88CjFwRw/PB9kwIDAQAB -----END PUBLIC KEY----- Here's the magic code to turn the above into an "RSACryptoServiceProvider" which is capable of verifying the signature. Uses the BouncyCastle library, since .NET apparently (and appallingly cannot do it without some major headaches involving certificate files): RSACryptoServiceProvider thingee; using (var reader = File.OpenText(@"c:\pemfile.pem")) { var x = new PemReader(reader); var y = (RsaKeyParameters)x.ReadObject(); thingee = (RSACryptoServiceProvider)RSACryptoServiceProvider.Create(); var pa = new RSAParameters(); pa.Modulus = y.Modulus.ToByteArray(); pa.Exponent = y.Exponent.ToByteArray(); thingee.ImportParameters(pa); } And then the code to actually verify the signature: var signature = ... //reads from the packet sent by the eCommerce system var data = ... //reads from the packet sent by the eCommerce system var sha = new SHA1CryptoServiceProvider(); byte[] hash = sha.ComputeHash(Encoding.ASCII.GetBytes(data)); byte[] bSignature = Convert.FromBase64String(signature); ///Verify signature, FINALLY: var hasValidSig = thingee.VerifyHash(hash, CryptoConfig.MapNameToOID("SHA1"), bSignature);

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• jquery tab switching links so they jump to top of page?

  - by Evan

  I was given some great help by redsquare to get this far to change jquery tabs from links within the content, but I have one more issue that I'm looking for support on... When a user clicks a link to switch to a different tab from within the content, can i get the page to jump to the top of the page? Within my demo link, scroll to the bottom of the page to click the links and they switch tabs just perfectly, which you can confirm if you scroll up. So, I'm looking for the switch to also jump the user to the top of the page, so the user doesn't have to "scroll" to the top of the page to begin reading new content. Here's my demo: http://jsbin.com/etoku3/11 Existing code: <script type="text/javascript"> $(document).ready(function() { var $tabs = $("#container-1").tabs(); var changeTab = function(ev){ ev.preventDefault(); var tabIndex = this.hash.charAt(this.hash.length-1) -1; $tabs.tabs('select', tabIndex); }; $('a.tablink').click(changeTab); }); </script> Thank you so much! Evan

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• rfacebook and facebook image uploading api

  - by msarvar

  I'm using rfacebook gem to interact with facebook connect. And I'm having a problem with uploading images. As facebook api says, the data should be transferred in a hash like json object. So I'm making an hash publish_values = { :uid => @post.profile.channel_uid, :message => @post.content, :auto_publish => true, } unless @post.message.skip_link_info publish_values[:attachment] = {} publish_values[:attachment][:name] = @post.message.link_title unless @post.message.link_title.blank? publish_values[:attachment][:caption] = @post.message.link_title unless @post.message.link_title.blank? publish_values[:attachment][:description] = @post.message.link_description unless @post.message.link_description.blank? unless @post.message.no_thumbnail || @post.message.link_image_url.blank? publish_values[:attachment][:media] = [{ :type => 'image', :src => @post.message.link_image_url, :href => @post.short_uri }] end end But It's not uploading any image to the facebook, the xml respons says "properties must be a dictionary". So I'm stuck in here for a couple days It doesn't make any sene

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• Hidden features of Perl?

  - by Adam Bellaire

  What are some really useful but esoteric language features in Perl that you've actually been able to employ to do useful work? Guidelines: Try to limit answers to the Perl core and not CPAN Please give an example and a short description Hidden Features also found in other languages' Hidden Features: (These are all from Corion's answer) C# Duff's Device Portability and Standardness Quotes for whitespace delimited lists and strings Aliasable namespaces Java Static Initalizers JavaScript Functions are First Class citizens Block scope and closure Calling methods and accessors indirectly through a variable Ruby Defining methods through code PHP Pervasive online documentation Magic methods Symbolic references Python One line value swapping Ability to replace even core functions with your own functionality Other Hidden Features: Operators: The bool quasi-operator The flip-flop operator Also used for list construction The ++ and unary - operators work on strings The repetition operator The spaceship operator The || operator (and // operator) to select from a set of choices The diamond operator Special cases of the m// operator The tilde-tilde "operator" Quoting constructs: The qw operator Letters can be used as quote delimiters in q{}-like constructs Quoting mechanisms Syntax and Names: There can be a space after a sigil You can give subs numeric names with symbolic references Legal trailing commas Grouped Integer Literals hash slices Populating keys of a hash from an array Modules, Pragmas, and command-line options: use strict and use warnings Taint checking Esoteric use of -n and -p CPAN overload::constant IO::Handle module Safe compartments Attributes Variables: Autovivification The $[ variable tie Dynamic Scoping Variable swapping with a single statement Loops and flow control: Magic goto for on a single variable continue clause Desperation mode Regular expressions: The \G anchor (?{}) and '(??{})` in regexes Other features: The debugger Special code blocks such as BEGIN, CHECK, and END The DATA block New Block Operations Source Filters Signal Hooks map (twice) Wrapping built-in functions The eof function The dbmopen function Turning warnings into errors Other tricks, and meta-answers: cat files, decompressing gzips if needed Perl Tips See Also: Hidden features of C Hidden features of C# Hidden features of C++ Hidden features of Java Hidden features of JavaScript Hidden features of Ruby Hidden features of PHP Hidden features of Python

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