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Articles indexed in March 2010

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  • What do I do with a Concrete Syntax Tree?

    - by Cap
    I'm using pyPEG to create a parse tree for a simple grammar. The tree is represented using lists and tuples. Here's an example: [('command', [('directives', [('directive', [('name', 'retrieve')]), ('directive', [('name', 'commit')])]), ('filename', [('name', 'f30502')])])] My question is what do I do with it at this point? I know a lot depends on what I am trying to do, but I haven't been able to find much about consuming/using parse trees, only creating them. Does anyone have any pointers to references I might use? Thanks for your help.

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  • jQuery Sortable - Limit number of items in list.

    - by Adam
    I have a schedule table I'm using jQuiry Sortable for editing. Each day is a UL, and each event is an LI. My jQuery is: $("#colSun, #colMon, #colTue, #colWed, #colThu").sortable({ connectWith: '.timePieces', items: 'li:not(.lith)' }).disableSelection(); To make all LI's sortable except those with class "lith" (day names). User can drag an event from day to day, or add new events by clicking a button, which appends a new dragable event (LI) to the fist UL (Sunday). I want to make each day accept only up to 10 events. How do I do this? Thanks in advance!

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  • Prolog - ASSERT and RETRACT

    - by KP65
    I was wondering, I am aware you can use assert to add facts or rules or whatever if you have declared the predicate to be -:dynamic, but this only allows the changes that are made to be kept in that session only, e.g. if you close the prolog window then the database changes are lost. So I was wondering, is there any way of making it so that the assert and retract predicates can make permanent changes to the prolog .pl file? Thanks

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  • How to use VisualStyleRenderer in Windows 7?

    - by Paulo Santos
    In a small project of mine I've came across the need of a collapsible group box. Searching the Net, I've found one here. In one of the comments there's an improvement on the original code that uses the VisualStyleRenderer class in order to acquire the TreeView open and closed glyph. Running the code it draws properly the Plus and Minus sing as Windows XP would draw it, however in Windows Vista and Windows 7 the glyph for open and closed nodes are small triangles. What kind of interface, class or PInvoke, I need to use in order to acquire the right glyph?

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  • How to make an ISO copy of Linux-filesystem and user files of VPS Debian based?

    - by moogeek
    Hello! I have a Debian-Based VPS on some hosting. I want to migrate from it and i need to make a full copy of all Linux-filesystem (and installed packages) + all home directory with website files. And then pack/convert it to ISO image so that to use it on cloud hostings like Amazon. The problem is that i have only ssh root access. Hosting support can't do that for me. Another part of the question - is it possible to enlarge the Linux-filesystem by not re-installing it and using the free space of home directory? Is it possible to do? I guess it is possible with rsync or something like that. Will my Mysql databes copy together with all other data? Thanks in advance!

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  • Is there a way to clone an existing VM on an ESXi server without having to re-import it?

    - by David Mackintosh
    I have imported a VM into an ESXi server using the VMware "Converter stand alone utility". However, this process is a little tedious. Since I eventually want several copies of this VM (or, to be more accurate, several more-or-less identical instances of this VM) to be running at the same time, is there a way to clone the already imported VM? Or do I have to re-import for each instance I want?

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  • Is there any way to limit my Internet connection to a per program basis?

    - by Igoru
    My Linux connection is REALLY free. I live in Brazil, so where I live I can only have 1 Mbit/s. Yes I know it's sad, but it's not the point. Everytime I'm updating my Ubuntu 9.04 or downloading something, it does eat all my bandwidth. Like, while update-manager is downloading the packages, I can see by netspeed applet in my panel that the incoming traffic goes to 110 kB/s. And then, my Emesene suddenly goes disconnected, and I can't navigate. As you can imagine, I can't use my Internet connection again until the packages are all downloaded or I cancel the update in the middle. As I said, same thing happens when I'm dowloading something, but less intrusive and immediate. The question is: is there any way to limit that APT/downloads traffic to some way I can still use my other Internet services, or to reserve some bandwidth for common navigation tasks (like we have on Windows, but I forgot this thing's name, it's like "something packages".

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  • How to get depth of array in PHP?

    - by user198729
    'test2' => array 'name' => string 'ntuser.dat.LOG' (length=14) 'type' => string 'application/octet-stream' (length=24) 'tmp_name' => string 'D:\wamp\tmp\php224.tmp' (length=22) 'error' => int 0 'size' => int 0 The above should be depth of 2.

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  • Bad access on removing the record from the contacts

    - by Mohammed Sadiq
    Hi all, I am facing a issue in removing the ABRecord . The code that i use is as follows : BOOL isRemoved = ABAddressBookRemoveRecord(addressbook, record, &error). But I am receiving the following call stack : *#0 0x005355bd in moveToRoot * *#1 0x005bbeb6 in sqlite3VdbeExec * **#2 0x0058e7e7 in sqlite3_step ** *#3 0x000800ad in CPSqliteStatementSendResults * *#4 0x00082dcd in CPRecordStoreProcessStatementWithPropertyIndices * *#5 0x00082e1d in CPRecordStoreProcessStatement * *#6 0x325b4b63 in ABCRemoveRecord * *#7 0x325c578a in ABAddressBookRemoveRecord * I searched , and this is the only way to remove the records from the contact . I dont know the reason for this access error . Any hep will be greatly appreciated .. Best Regards, MOhammed Sadiq.

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  • How to rewrite a URL with %23 in it?

    - by Jan P.
    I have a (wordpress) blog where after commenting the users are redirected back to the page with an anchor to their comment. Should look like this: http://example.org/foo-bar/#comment-570630 But somehow I get a lot of 404 ins my logfiles for such URLs: http://example.org/foo-bar/%23comment-570630 Is there a way to write a .htaccess rewrite rule to fix this? Bonus question: Any idea why this happens and what I can do about it?

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  • How to develop modular web UIs with Django?

    - by nh2
    When doing larger sites in "big business", you most probalbly work in a team with several developers. Let's say dev A makes a form to insert new user data, B creates a user list, C makes some privilege administration and D does crazy statistic graphs work with image generation and so on. Each dev begins to develop his own component, creates a view and a template and tests that independently, until each component works. Now, the client wants to have all those components on one bit HTML page. How to achieve this? How to assemble different views/templates in a form of composition so that they remain modular and can be developed and tested independently? It seems inheritance is not the way to go because all of those UI components are equal and there is no hierarchy. The idea of the assembling template is something like <html> <head> // include the css for the components and their assembly </head> <body> // include user data form here <some containers, images, and so on> // show user list // show privilege administration in this part // and finally, the nice statistic graphs // perhaps, we want to display some other components here in future </body> </html> I have not found an answer on the net yet. Most people come up with one big template which just implements all of the UI functionality, removing all modularity. Each component shall have its own template and view dealing only with that component developed by one person each, and they then shall be sticked together just like bricks. I would highly appreciate any hints!

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  • Attributed strings in UITableViewCells without WebView?

    - by arnekolja
    Hello, does anyone know if there's a way in with 3.0+ to display attributed strings within a UITableViewCell without using a UIWebView for that? I need to display a string with linked, tappable substrings as the typical detailTextLabel. I wouldn't mind exchanging this UILabel against another type of view, but I think a UIWebView could be just too slow when rendering a table with hundrets of cells. Or does someone have opposite experiences here? So my question is: what's the best way to achieve mixed strings in a very large table without a great performance hit? I searched for this almost a whole day now, but I can only find old posts mentioning that there's no attributed string on the iPhone (outdated, as this was pre-3.0) and/or saying that they use a UIWebView for that. But really, I don't think this would perform very well on large tables, would it? Many, many thanks in advance Arne

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  • Readability and IF-block brackets: best practice

    - by MasterPeter
    I am preparing a short tutorial for level 1 uni students learning JavaScript basics. The task is to validate a phone number. The number must not contain non-digits and must be 14 digits long or less. The following code excerpt is what I came up with and I would like to make it as readable as possible. if ( //set of rules for invalid phone number phoneNumber.length == 0 //empty || phoneNumber.length > 14 //too long || /\D/.test(phoneNumber) //contains non-digits ) { setMessageText(invalid); } else { setMessageText(valid); } A simple question I can not quite answer myself and would like to hear your opinions on: How to position the surrounding (outermost) brackets? It's hard to see the difference between a normal and a curly bracket. Do you usually put the last ) on the same line as the last condition? Do you keep the first opening ( on a line by itself? Do you wrap each individual sub-condition in brackets too? Do you align horizontally the first ( with the last ), or do you place the last ) in the same column as the if? Do you keep ) { on a separate line or you place the last ) on the same line with the last sub-condition and then place the opening { on a new line? Or do you just put the ) { on the same line as the last sub-condition? Community wiki. EDIT Please only post opinions regarding the usage and placement of brackets. The code needs not be re-factored. This is for people who have only been introduced to JavaScript a couple of weeks ago. I am not asking for opinions how to write the code so it's shorter or performs better. I would only like to know how do you place brackets around IF-conditions.

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  • is there some PHP social crm, plugins, or frameworks?

    - by garcon1986
    Hello, What i need to do: I'm trying to realize social networking graph for companies, employees in CRM. They could have many complex relationships. A company can have its network like inverstors, partners, competitors and customers etc. I want to realize a dynamic social networking graph for it. And it has to be implemented by php. Right now, i know SugarCRM and vTigerCRM are php open source CRMs. And SugarCRM provides some social functions. And there are a lot of other CRMs, while i'm not sure if they are realized by php, such as: ACT!, Microsoft Dynamics, Oracle Siebel Social CRM, Salesforce, BatchBlue, Buzzient etc. Do you know any other php CRMs, especially php social CRMs? Thanks

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  • Problem with sessions subdomains and authlogic in Rails.

    - by Alfred Nerstu
    I've got a rails app with authlogic authentication and a username.domain.com structure built with subdomain-fu. But my session breaks when going from domain.com to username.domain.com. I've tried to add config.action_controller.session = {:domain => '.localhost:3000'} to my development.rb but that seams to break authlogic disabling sign out/sign in. Any suggestions on what to do? Thanks in advance!

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  • C# Reflection StackTrack get value

    - by John
    I'm making pretty heavy use of reflection in my current project to greatly simplify communication between my controllers and the wcf services. What I want to do now is to obtain a value from the Session within an object that has no direct access to HttpSessionStateBase (IE: Not a controller). For example, a ViewModel. I could pass it in or pass a reference to it etc. but that is not optimal in my situation. Since everything comes from a Controller at some point in my scenario I can do the following to walk the sack to the controller where the call originated, pretty simple stuff: var trace = new System.Diagnostics.StackTrace(); foreach (var frame in trace.GetFrames()) { var type = frame.GetMethod().DeclaringType; var prop = type.GetProperty("Session"); if(prop != null) { // not sure about this part... var value = prop.GetValue(type, null); break; } } The trouble here is that I can't seem to work out how to get the "instance" of the controller or the Session property so that I can read from it.

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  • What is Apache process model?

    - by Morgan Cheng
    I have been googling this question for some time but got no answers. What's the Apache process model? By process model, I mean how Apache manage process or thread to handling HTTP request. Does it fork one process for each HTTP request? Does it have process/thread pool? Can we config it? Is there any online doc for such Apache details?

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  • Apache, logerror and logrotate: what is the best method?

    - by OlivierDofus
    Hi! Here's a vhost example of my sites: <VirtualHost *:80> DocumentRoot /datas/web/woog ServerName woog.com ServerAlias www.woog.com ErrorLog "|/httpd-2.2.8/bin/rotatelogs /logs/woog/error_log 86400" CustomLog "|/httpd-2.2.8/bin/rotatelogs /logs/woog/access_log 86400" combined DirectoryIndex index.php index.htm <Location /> Allow from All </Location> <Directory /*> Options FollowSymLinks AllowOverride Limit AuthConfig </Directory> </VirtualHost> I've got 12 sites running now. This gives something like: [Shake]:/sources/software/mod_log_rotate# ps x | grep rotate /httpd-2.2.8/bin/rotatelogs /logs/[hidden siteweb]/error_log 86400 /httpd-2.2.8/bin/rotatelogs /logs/[hidden siteweb]/error_log 86400 [snap (as many error_log as virtual hosts)] /httpd-2.2.8/bin/rotatelogs /logs/[hidden siteweb]/access_log 86400 /httpd-2.2.8/bin/rotatelogs /logs/[hidden siteweb]/access_log 86400 [snap (as many access_log as virtual hosts)] grep rotate [Shake]:/sources/software/mod_log_rotate# !!! I've been looking everywhere but I've only found mod_log_rotate. The "little" problem is that the author (very good C developper) explains: "Unfortunately Apache error logs are handled in such a way that we can't work the same log rotation magic on them. Like transfer logs they support piped logging though so you can still use rotatelogs for them. " So my question is: what would be the best way to handle multiple logs? If I just do a very classical log and I use the system's "logrotate" program couldn't this be a good deal? How would/do you deal with that? Thank you!

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  • OpenVPN make redirect-gateway optional

    - by Tuinslak
    Hi there, I'm currently running an OpenVPN server for multiple clients. All traffic is directed through the VPN (it's set up as gateway; push "redirect-gateway def1"). So far, all is working fine. However, I'd like to connect a couple of servers to this virtual private network, without these servers using the OVPN daemon as gateway. These servers have to be accessible from both their WAN as well as their LAN IP address. Certain services will be accessible only from the LAN side. Is there any way, for a client, to ignore the push redirect-gateway option? Kind regards, Tuinslak

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  • How to manage bookmarks?

    - by LNK2019
    Hi Everyone, I have 981 bookmarks and about 30 to 40 folders in my firefox browser. Now,they become very difficult to manage. I searched "bookmark management" etc in google but I can't find useful tutorial or guidelines to follow. I've been looking for answers for a long time. I tried Xmakrs ReaditLater lace. But they couldn't help me organize my bookmarks. Do you have any tips or suggestions on how to manage your bookmarks? In what situation you want to create a tag instead of a folder? Thanks

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  • Database Design - Surrogate keys: Part 1 of many (Rules for Surrogate Keys, E. F. Codd and C J Date

    - by tonyrogerson
    I started writing an article for my blog on surrogate keys drawing in the original research by E F Codd and C J Date, its getting a bit big :) so I'm going to chop it up into a number of posts over the coming weeks depending on my time. I'm interested in your thoughts and if you disagree please let me know but more importantly give me references back to papers stating why you take that position. Hope it makes sense. Surrogate keys There are two factions in the world of Database Design that...(read more)

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