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Articles indexed in February 2011

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  • How do I improve my code reading skills

    - by Andrew
    Well the question is in the title - how do I improve my code reading skills. The software/hardware environment I currently do development in is quite slow with respect to compilation times and time it takes the whole system to test. The system is quite old/complex and thus splitting it into a several smaller, more manageable sub-projects is not feasible in a neare future. I have realized is what really hinders the development progress is my code reading skills. How do I improve my code reading skills, so I can spot most of the errors and issues in the code even before I hit the "do compile" key, even before I start the debugger?

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  • What is the most complicated data structure you have used in a practical situation?

    - by Fanatic23
    The germ for this question came up from a discussion I was having with couple of fellow developers from the industry. Turns out that in a lot of places project managers are wary about complex data structures, and generally insist on whatever exists out-of-the-box from standard library/packages. The general idea seems to be like use a combination of whats already available unless performance is seriously impeded. This helps keeping the code base simple, which to the non-diplomatic would mean "we have high attrition, and newer ones we hire may not be that good". So no bloom filter or skip-lists or splay trees for you CS junkies. So here's the question (again): Whats the most complicated data structure you did or used in office? Helps get a sense of how good/sophisticated real world software are.

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  • What should you say in post-interview?

    - by ??? Shengyuan Lu
    When you are leaving your company, you will be post-interviewed. As best practice, you shouldn't say something bad about your company, because it will "burn your bridge", another best practice is to keep silence if the company really sucks. I think if you decide to leave, there must be a reason(s) making you really unhappy, and I am sure you will have something really important to tell your employer. Then what is your attitude about post-interview?

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  • What is the etiquette in negotiating payment for a software development job

    - by EpsilonVector
    The reason I'm taking a general business question and localize it to software development is that I'm curious as to whether there are certain trends/etiquette/nuances that are typical to our industry. For example, I can imagine two different attitudes employers may generally have to payment negotiations: 1) we'll give you the best offer so we can't really be flexible about it because we already pretty much gave you everything we can give you, or 2) we'll give him an average offer and give in to a better one if forced to. If you try to play hard ball in the first attitude it'll probably cost you the job because you ask for more than they can give you, however if you don't insist on better payment in the second one you'll get a worse offer. In short, when applying to a typical job in our industry what are the typical attitudes from employers on the offers they give, what is the correct way to ask for a better payment, do these things differ between different types of companies (for example startups vs well entrenched companies), and how do these things differ between different kinds of applicants (graduate vs student)?

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  • How far back do you use your version control and for what reason?

    - by acidzombie24
    Typically when i work on a project i only go back a few days or the last major change when i decide to do something drastic. I sometimes notice i broke a test or a feature and overlooked it for a few weeks so i may go back a month or two and see if the feature or test is broken and trace down the week i broke it. Then find what change did it. On a long term project over the span of a year. Do you actually go back 6+ months and if so why?

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  • How to introduce versioning for questions on Stack*? [closed]

    - by András Szepesházi
    What today is the best answer for any given question, yesterday was not available and tomorrow will be obsolete. Especially when we're talking about software development. Here is an example for you (there must be thousands, this one is absolutely imaginary): Q: What is the best way to implement autocomplete in javascript? A: (2000) Whut? A: (2007) Write a custom ajax function, display the results after processing A: (2011) Use this plugin: http://jqueryui.com/demos/autocomplete/ (nono, I'm not a jQuery affiliate, actually I prefer MooTools) What would be your recommendation to introduce versioning for Stack Exchange questions and answers? Is there a need at all for that?

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  • SSD harddisks & programming

    - by Carra
    SSD harddisks have been on the rise lately. And I've been wondering if it's worth buying one as a programmer. Being able to save five minutes when starting my PC is fun but won't convince my boss. How does it impact a typical visual studio project containing hundreds of files? Compile times, accessing files, waiting for visual studio to do its thing... Are there any benchmarks that checked this? And ideally, how much time would one win each week by upgrading?

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  • Where to find Hg/Git technical support?

    - by Rook
    Posting this as a kind of a favour for a former coleague, so I don't know the exact circumstances, but I'll try to provide as much info as I can ... A friend from my old place of employment (maritime research institute; half government/commercial funding) has asked me if I could find out who provides technical support (commercial) for two major DVCS's of today - Git and Mercurial. They have been using VCS for years now (Subversion while I was there, don't know what they're using now - probably the same), and now they're renewing their software licences (they have to give a plan some time in advance for everything ... then it goes "through the system") and although they will be keeping Subversion as well, they would like to justify beginning of DVCS as an alternative system (most people root for Mercurial since it seems simpler; mostly engineers and physicians there who are not that interested in checking Git repos for corruption and the finer workings of Git, but I believe any one of the two could "pass") - but it has to have a price (can be zero; no problem there) and some sort of official technical support. It is a pro forma matter, but it has to be specified. Most of the people there are using one of the two already, but this has to be specified to be official. So, I'm asking you - do you know where could one go for Git or Mercurial technical support (can be commercial)? Technical forums and the like are out of the question. It has to work on the principle: - I have a problem. - I post a question with the details. - I get an answer in specified time. It can be "we cannot do that." but it has to be an official answer and given in agreed time. I'm sure by now most of you understand what I'm asking, but if not - post a comment or similar. Also, if you think of any reasons which could decide justification of introducing Git/Hg from an technical and administrative viewpoint, feel free to write them down also.

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  • How do you remember where in your code you want to continue next time?

    - by bitbonk
    When you interrupt the work on some code (be it because you have to work on something else or go on vacation or simply because it is the end of the day), once you close that Visual Studio project, what is your preferred way to remember what you want to do next when you start working on that code again. Do you set a Visual Studio bookmark or do write down something like // TODO: continue here next time? Maybe you have a special tag like // NEXT:? Do you put a sticky note on your monitor? Do you use a cool tool or Visual Studio plugin I should know? Do you have any personal trick that helps you find the place in your code where you left off the last time you worked on your code?

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  • "Untrusted packages could compromise your system's security." appears while trying to install anything

    - by maria
    Hi I've freshly installed Ubuntu 10.4 on a new computer. I'm trying to install on it application I need (my old computer is broken and I have to send it to the service). I've managed to install texlive and than I can't install anything else. All software I want to have is what I have succesfuly installed on my old computer (with the same version of Ubuntu), so I don't understand, why terminal says (sorry, the terminal talks half English, half Polish, but I hope it's enough): maria@marysia-ubuntu:~$ sudo aptitude install emacs Czytanie list pakietów... Gotowe Budowanie drzewa zaleznosci Odczyt informacji o stanie... Gotowe Reading extended state information Initializing package states... Gotowe The following NEW packages will be installed: emacs emacs23{a} emacs23-bin-common{a} emacs23-common{a} emacsen-common{a} 0 packages upgraded, 5 newly installed, 0 to remove and 0 not upgraded. Need to get 23,9MB of archives. After unpacking 73,8MB will be used. Do you want to continue? [Y/n/?] Y WARNING: untrusted versions of the following packages will be installed! Untrusted packages could compromise your system's security. You should only proceed with the installation if you are certain that this is what you want to do. emacs emacs23-bin-common emacsen-common emacs23-common emacs23 Do you want to ignore this warning and proceed anyway? To continue, enter "Yes"; to abort, enter "No" I was trying to install other editors as well, with the same result. As I decided that I might be sure that I know the package I want to install is secure, finaly I've entered "Yes". The installation ended succesfuly, but editor don't understand any .tex file (.tex files are for sure fine): this is pdfTeX, Version 3.1415926-1.40.10 (TeX Live 2009/Debian) restricted \write18 enabled. entering extended mode (./Szarfi.tex ! Undefined control sequence. l.2 \documentclass {book} ? What's more, I've realised that in Synaptic Manager there is no package which would be marked as supported by Canonical... Any tips? Thanks in advance

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  • How to check system performance?

    - by Woltan
    Hi all, I am a new Ubuntu user and really like the look and the features of the OS. However, I have a feeling that the performance could be better. With that I mean: Somehow the scrolling within firefox of sites seems laggy. I do not know how I should measure it but there is a difference. Not that it is unusable but it is aggravating. Java programs are running really slow. As a comparison (I know it is not a fair one), I tried to run a game using wine. The graphic specifications using windows were much higher (1600x1200) with a high level of detail, and in ubuntu with the lowest level of detail 1024x768 was the maximum. (My graphics card is a GeForce GTS 450 with 1gb RAM) Coming to my question: Is there a way to measure the performance of 3D acceleration, java applets, firefox scrolling etc. with a tool and compare it with lets say a windows OS or other users having almost the same hardware? Maybe it is a setup issue where some fundamental drivers are missing or something!? Any help, link, suggestion is appreciated! Cherio Woltan

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  • What snapshot software do you recommend? [closed]

    - by Charbel
    Possible Duplicate: What screenshot tools are available? Hi, is there a snapshot software for Ubuntu? Something like SnagIt? The idea is many times I have to take the snapshot and edit the image to crop to my region of interest, SnagIt does that automatically and very nicely. Another feature is to take a snapshot of text (that can't be otherwise copied - like text in a photo) and then parse it into actual text document using an OCR technology. Thanks

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  • Can I make a Compiz animation rule for Wine menus?

    - by satuon
    Wine menus appear and disappear with the "Glide 2" effect. This looks good for dialogs but not so good for menus. Can I make a custom rule to apply fade in/out instead? I include the animation section from my exported Compiz settings (default values are skipped): [animation] s0_open_matches = ((type=Dialog | ModalDialog | Normal | Unknown) | name=sun-awt-X11-XFramePeer | name=sun-awt-X11-XDialogPeer) & !(role=toolTipTip | role=qtooltip_label) & !(type=Normal & override_redirect=1) & !(name=gnome-screensaver);(type=Menu | PopupMenu | DropdownMenu | Dialog | ModalDialog | Normal);(type=Tooltip | Notification | Utility) & !(name=compiz) & !(title=notify-osd); s0_close_effects = animation:Glide 2;animation:Fade;animation:None; s0_close_matches = ((type=Dialog | ModalDialog | Normal | Unknown) | name=sun-awt-X11-XFramePeer | name=sun-awt-X11-XDialogPeer) & !(role=toolTipTip | role=qtooltip_label) & !(type=Normal & override_redirect=1) & !(name=gnome-screensaver);(type=Menu | PopupMenu | DropdownMenu | Dialog | ModalDialog | Normal);(type=Tooltip | Notification | Utility) & !(name=compiz) & !(title=notify-osd);

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  • Why do none-working websites look like search indexes?

    - by Asaf
    An example of this could be shown on every .tk domain that doesn't exist, just write www.givemeacookie.tk or something, you get into a fake search engine/index Now these things are all over, I use to always ignore it because it was obvious just a fake template, but it's everywhere. I was wondering, where is it originated (here it's searchmagnified, but in their website it's also something generic) ? Is there a proper name for these type of websites?

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  • Android - Efficient way to draw tiles in OpenGL ES

    - by Maecky
    Hi, I am trying to write efficient code to render a tile based map in android. I load for each tile the corresponding bitmap (just one time) and then create the according tiles. I have designed a class to do this: public class VertexQuad { private float[] mCoordArr; private float[] mColArr; private float[] mTexCoordArr; private int mTextureName; private static short mCounter = 0; private short mIndex; As you can see, each tile has it's x,y location, a color array, texture coordinates and a texture name. Now, I want to render all my created tiles. To reduce the openGL api calls (I read somewhere that the state changes are costly and therefore I want to keep them to a minimum), I first want to hand ALL the coordinate-arrays, color-arrays and texture-coordinates over to OpenGL. After that I run two for loops. The first one iterates over the textures and binds the texture. The second for loop iterates over all Tiles and puts all tiles with the corresponding texture into an IndexBuffer. After the second for loop has finished, I call gl.gl_drawElements() whith the corresponding index buffer, to draw all tiles with the texture associated. For the next texture I do the same again. Now I run into some problems: Allocating and filling the FloatBuffers at the start of each rendering cycle costs very much time. I just run a test, where i wanted to put 400 coordinates into a FloatBuffer which took me about 200ms. My questions now are: Is there a better way, handling the coordinate and color structures? How is this correctly done, this is obviously not the optimal way? ;) thanks in advance, regards Markus

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  • C# Timers for game development

    - by Valentin
    Hi, all! I want to find out the best way of creating time based events in games. Lets talk for example about Texas Holdem Poker. Server can handle thousands of tables and in every table we have timers: turn timer, hold seat timer and so on. What is the best way of timers realization for this purpose? Is System.Timers.Timer class can handle this or it will be more reasonable to create a separate thread with sorted time queue (for example an ascending sorted list with int values which represent time in ms remained)? Thanks in advance, Valentin

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  • Switching between Discrete and Integrated GPUs

    - by void-pointer
    Hello everyone, I develop CUDA applications on my Alienware M17x portable back-breaker, which has two discrete GTX 285M GPUs and one integrated GeForce 9400M GPU. I can currently switch between them using NVIDIA's software, but I would like the ability to do so within my applications for purposes of benchmarking and general convenience. Apparently this requires the "NDA version" of NVIDIA's Driver API, which I know not how to obtain. Would using this API be the only way to accomplish what I seek, and if so, how would I obtain it? A solution using Windows APIs would also be acceptable, though less preferable to one which would leverage a cross-platform API. I have created a similar thread concerning the matter on NVIDIA's forum, which is down at the time of this writing. Thanks for reading my question; it is much appreciated!

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  • Common light map practices

    - by M. Utku ALTINKAYA
    My scene consists of individual meshes. At the moment each mesh has its associated light map texture, I was able to implement the light mapping using these many small textures. 1) Of course, I want to create an atlas, but how do you split atlases to pages, I mean do you group the lm's of objects that are close to each other, and load light maps on the fly if scene is expected to be big. 2) the 3d authoring software provides automatic uv coordinates for each mesh in the scene, but there are empty areas in the texel space, so if I scale the texture polygons the texel density of each face wil not match other meshes, if I create atlas like that there will be varying lm resolution, how do you solve this, just leave it as it is, or ignore resolution ? Actually these questions also applies to other non tiled maps.

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  • R - indirectly calling a matrix using a string

    - by Boris Senderovich
    Example: There is a matrix of data called VE There is a vector of string where the first element is the string VE. I need to indirectly call the string and be able to access data. For example if I need the 6th column of matrix VE then I want to do: Vector[1][,6] Essentially I need R to start reading those string as if they are the matrix names that are already in this page. I need this syntax to be dynamic because I am putting it in a loop.

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  • modrewrite to another server if file/image is not found

    - by Traveling_Monk
    Hi I am working on a locally served copy of a remote site and I don't want to have to download all the images rtelated to the site so I thought i could come up with a mod_rewrite rule for to grab images from the remote server if the are not found this is the code that i have <IfModule mod_rewrite.c> RewriteEngine On RewriteCond %{REQUEST_FILENAME} -f [NC] RewriteRule ^/(.*\.(png|gif|jpg|jpeg)) https://www.exmple.com/$1 [NC,P,L] </IfModule> The page is still giving me 404's for images that are on the remote server, so this rule is not working. I do know that the htaccess is being processed because rules later in the IfModule mod_rewrite.c block are being used. (i simplified my code sample but this is the first rule in the IfModule mod_rewrite.c block)

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  • Is there an easy way to merge C# dynamic objects

    - by ajma
    Let's say I have two dynamic objects like this: var objA = new { test = "test", blah = "blah" }; var objB = new { foo = "foo", bar = "bar" }; I want to combine them to get: new { test = "test", blah = "blah", foo = "foo", bar = "bar" }; I won't know what the properties are for both objA and objB at compile time. I want this to be like jquery's extend method. Anybody know of a library or a .net framework class that can help me do this?

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  • Passing report values to a query

    - by Beavis
    I'm a novice with Microsoft Access as my background is mostly .NET. I'm sure what I'm trying to accomplish is dead simple but I need some direction. I have a report and a query. The query returns a single numeric value based on a single numeric criteria. Select total from table where id = [topic] I have placed a text box on my report so I can feed the id to this query and in return get the total. It seems like DLookUp is what I want but no matter how I construct it, I get an "#Error" in the text box when I run the report. Currently my DLookUp looks like this (I just hard-coded now for simplicity): =DLookUp("[total]","myquery","[topic] = 3") How can I pass a value from a field on my report to a query so I can return the query's single numeric value? Thanks.

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  • Trying to draw 2 objects on screen and store the selected item names in an array

    - by thefonso
    Ok...this is a homework question, here is what i'm asked to do.... "Allow the user to draw two Shapes, which when instantiated, get put into the array myShapes...(store the shapes in the createShape() method." I want to know if I'm going in the right direction. Do I need to modify only Model.java or GUIDemo.java as well? Am I sufficient in thinking of only storing the values for the array via a loop inside my createShape() method? How do I go a bout checking to see if things work so far. There are many steps for this homework project after this one but i'm stuck here. Please point me in the right direction. The array myShapes lives inside my model class inside Model.java: package model; import java.awt.Color; import java.awt.Container; import shapes.Line; import shapes.Oval; import shapes.Rectangle; import shapes.Shape; import shapes.Triangle; import interfaces.Resettable; public class Model implements Resettable { private Container container; private String message; public final static String DRAW = "Draw"; public final static String MOVE = "Move"; public final static String REMOVE = "Remove"; public final static String RESIZE = "Resize"; public final static String FILL = "Fill"; public final static String CHANGE = "Change"; public final static String RECTANGLE = "Rectangle"; public final static String OVAL = "Oval"; public final static String LINE = "Line"; public final static String TRIANGLE = "Triangle"; private String action = DRAW; private boolean fill = false; public static String[] selections = {"Rectangle", "Oval", "Line", "Triangle"}; //project 9 begin public Shape[] myShapes = new Shape[2]; //project 9 stop private String currentShapeType; private Shape currentShape; public Color lineColor; private Color fillColor = Color.gray; public Shape createShape() { if(currentShapeType == RECTANGLE){ currentShape = new Rectangle(0, 0, 0, 0, lineColor, fillColor, fill); } if(currentShapeType == OVAL) { currentShape = new Oval(0,0,0,0, lineColor, fillColor, fill); } if(currentShapeType == LINE) { currentShape = new Line(0,0,0,0, lineColor, fillColor, fill); } if(currentShapeType == TRIANGLE) { currentShape = new Triangle(0,0,0,0, lineColor, fillColor, fill); } //project 9 start if(myShapes[0] == null) { myShapes[0]=currentShape; } else { myShapes[1]=currentShape; } //project 9 stop return currentShape; } public Shape getCurrentShape() { return currentShape; } public String getCurrentShapeType(){ return currentShapeType; } public void setCurrentShapeType(String shapeType){ currentShapeType = shapeType; } public Model(Container container) { this.container = container; } public void repaint() { container.repaint(); } public void resetComponents() { action = DRAW; currentShape = null; if (container instanceof Resettable) { ((Resettable) container).resetComponents(); } } public String getAction() { return action; } public void setAction(String action) { this.action = action; } public boolean isFill() { return fill; } public void setFill(boolean fill) { this.fill = fill; } public void setMessage(String msg) { this.message = msg; } public String getMessage() { return this.message; } public Color getLineColor() { return this.lineColor; } public void setLineColor(Color c) { this.lineColor = c; } public String toString() { return "Model:\n\tAction: " + action + "\n\tFill: " + fill; } } The application is run from GUIDemo.java: package ui.applet; import interfaces.Resettable; import java.applet.Applet; import java.awt.Graphics; import event.ShapeMouseHandler; import shapes.Shape; //import ui.panels.ButtonPanel; import ui.panels.ChoicePanel; import ui.panels.MainPanel; import model.Model; @SuppressWarnings("serial") public class GUIDemo extends Applet implements Resettable { MainPanel mainPanel; Model model; ChoicePanel choicePanel; public void init() { resize(600,400); model = new Model(this); choicePanel = new ChoicePanel(model); mainPanel = new MainPanel(model); this.add(choicePanel);//this is the drop down list this.add(mainPanel);//these are the radio buttons and reset button ShapeMouseHandler mouseHandler = new ShapeMouseHandler(model); addMouseListener(mouseHandler); addMouseMotionListener(mouseHandler); } public void paint(Graphics g) { Shape shape; shape = model.getCurrentShape(); if(shape != null) { shape.draw(g); } System.out.println(model); System.out.println(shape); } public void resetComponents() { mainPanel.resetComponents(); choicePanel.resetComponents(); } }

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  • Animated record deletion with jquery like mootools example

    - by twitter
    I was reading around and saw this example from David Walsh about how to animate record deletion with mootools. Does the exact same effect exist in jquery? This is his mootools code. window.addEvent('domready',function() { $$('a.delete').each(function(el) { el.addEvent('click',function(e) { e.stop(); var parent = el.getParent('div'); var request = new Request({ url: 'mootools-record-delete.php', link: 'chain', method: 'get', data: { 'delete': parent.get('id').replace('record-',''), ajax: 1 }, onRequest: function() { new Fx.Tween(parent,{ duration:300 }).start('background-color', '#fb6c6c'); }, onSuccess: function() { new Fx.Slide(parent,{ duration:300, onComplete: function() { parent.dispose(); } }).slideOut(); } }).send(); }); }); });

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  • How to I display results of phpcs in VIM?

    - by Matt
    I am presently trying to use PHP Codesniffer (PEAR) in vim for PHP Files. I have found 2 sites that give code to add into the $HOME/.vim/plugin/phpcs.vim file. I have added the code and I "think" it is working, but I cannot see the results, I only see one line at the very bottom of vim that says (1 of 32) but I cannot see any of the 32 errors. Here is my .vimrc file " Backup Options -> Some People may not want this... it generates extra files set backup " Enable Backups set backupext=.bak " Add .bak extention to modified files set patchmode=.orig " Copy original file to with .orig extention Before saving. " Set Tabs and spacing for PHP as recomended by PEAR and Zend set expandtab set shiftwidth=4 set softtabstop=4 set tabstop=4 " Set Auto-indent options set cindent set smartindent set autoindent " Show lines that exceed 80 characters match ErrorMsg '\%80v.\+' " Set Colors set background=dark " Show a status bar set ruler set laststatus=2 " Set Search options highlight, and wrap search set hls is set wrapscan " File Type detection filetype on filetype plugin on " Enable Spell Checking set spell " Enable Code Folding set foldenable set foldmethod=syntax " PHP Specific options let php_sql_query=1 " Highlight sql in php strings let php_htmlInStrings=1 " Highlight HTML in php strings let php_noShortTags=1 " Disable PHP Short Tags let php_folding=1 " Enable Ability to FOLD html Code I have tried 2 different versions of phpcs.vim, and I get the same results for both: Version 1 (found at: VIM an a PHP IDE) function! RunPhpcs() let l:filename=@% let l:phpcs_output=system('phpcs --report=csv --standard=YMC '.l:filename) " echo l:phpcs_output let l:phpcs_list=split(l:phpcs_output, "\n") unlet l:phpcs_list[0] cexpr l:phpcs_list cwindow endfunction set errorformat+=\"%f\"\\,%l\\,%c\\,%t%*[a-zA-Z]\\,\"%m\" command! Phpcs execute RunPhpcs() Version 2: (found at Integrated PHP Codesniffer in VIM ) function! RunPhpcs() let l:filename=@% let l:phpcs_output=system('phpcs --report=csv --standard=YMC '.l:filename) let l:phpcs_list=split(l:phpcs_output, "\n") unlet l:phpcs_list[0] cexpr l:phpcs_list cwindow endfunction set errorformat+="%f"\\,%l\\,%c\\,%t%*[a-zA-Z]\\,"%m" command! Phpcs execute RunPhpcs() Both of these produce identical results. phpcs is installed on my system, and I am able to generate results outside of vim. Any help would be appreciated I am just learning more about vim...

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