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  • P implies Q, how to read in english

    - by user177883
    how to read P implies Q in classical logic? example : Distributivity: Ka(X->Y) -> (KaX -> KaY) This is model logic which uses classical logic rules. KaX : a knows the that X is true. I m curious about how to read implication in english? if then else?

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  • ExtJS: Add Single Click Action To A Node In A TreePanel

    - by FluidFoundation
    [revised] I'm creating a TreePanel in ExtJs that is loading its children from a JSON file. I'm having trouble adding a click action to the nodes. I'm not sure whether it's added in the script creating the tree, or if its added as a property in the JSON, and if so, what the syntax would be. Any help would be appreciated! Please provide an example if possible.

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  • Facebook Privacy Permissions Design

    - by Ian
    Does anyone know the general layout of how facebook's privacy permissions system works (database)? I've been trying to figure out how they manage to have such a complex set of rules be applied to various content on their site, yet it remains fast. How are they doing that?

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  • Why doesn't web browsers have built in validators?

    - by August Karlstrom
    As far as I know there is no web browser with built in validators for HTML, CSS and Javascript. Developing web pages without validation is like using a compiler that doesn't do syntax analysis. Even Firefox with its excellent plugins aimed at developers like Firebug lacks plugins for CSS and Javascript validation. Wouldn't it be useful to have these plugins? Am I missing something?

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  • Why can't my function access a variable in an enclosing function?

    - by nailer
    I know about the LEGB rule. But a simple test of whether a function has read access to variables defined in an enclosing function doesn't seem to actually work. Ie: #!/usr/bin/env python2.4 '''Simple test of Python scoping rules''' def myfunction(): print 'Hope this works: '+myvariable def enclosing(): myvariable = 'ooh this worked' myfunction() if __name__ == '__main__': enclosing() Returns: NameError: global name 'myvariable' is not defined Am I doing something wrong? Is there more to it than the LEGB resolution order?

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  • vim c++ break line

    - by Myx
    Hello: How can I break long lines when writing c++ code in vim? For example, if I have something like 56 fprintf(stderr, "Syntax error reading recursion value on 57 line %d in file %s\n", line_count, filename); I get the following compile errors: :56:25: warning: missing terminating " character :56: error: missing terminating " character :57: error: stray ‘\’ in program :57:37: warning: missing terminating " character :57: error: missing terminating " character I'm a vim newbie. Thanks!

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  • Custom warning in Xcode

    - by maximumnamelength
    I'm working on an API library and I'd like to add a few warnings that would appear when another developers builds the app if an optional apikey is not included. It should be buildable w/o the key (since it's optional) so I can't just add a syntax error to force a build error. I know Xcode supports TODO and FIXME but those aren't really highlighted anywhere major. Any other thoughts on how to approach this?

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  • Unity 2.0 and policy injection in .config

    - by marcusoft.net
    I want to use unity (2.0) to resolve my dependencies in a way so that i can configure policy injection (policies, matching rules and call handlers) in the .config file. Or an other way to put it; i want my resolved objects to be "policy enabled", so that i can add and change to policies in config without have to recompile. Any ideas on how to do that?

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  • Loop over array and set all vars to false or true in javascript

    - by Sixfoot Studio
    Hi All, I need to loop over my array and set all the vars to false or true. I have tried numerous options, none of which are working and it's clearly my lack of javascript syntax knowledge..Please take a look at this: var closeAllCells = [IncomeOpen = "false", RehabOpen = "false", AttendantCareOpen = "false", HomeMaintenanceOpen = "false", DependantCareOpen = "false", IndexationOpen = "false", DeathFuneralOpen = "false", ComprehensiveOpen = "false", CollisionOpen = "false", LiabilityOpen = "false", DCPDOpen = "false"]; So my thinking is that I can just loop over this as follows for (var i=0;i<closeAllCells.length;i++) { closeAllCells[i] = true; // or false if I wished }

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  • How to get multiple counts with one SQL query?

    - by Crobzilla
    I am wondering how to write this query. I know this actual syntax is bogus, but it will help you understand what I am wanting. I need it in this format, because it is part of a much bigger query. SELECT distributor_id, COUNT(*) AS TOTAL, COUNT(*) WHERE level = 'exec', COUNT(*) WHERE level = 'personal' I need this all returned in one query. Also, it need to be in one row, so the following won't work: 'SELECT distributor_id, COUNT(*) GROUP BY distributor_id'

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  • Running VB & C# programs in Ubuntu

    - by Arjun Vasudevan
    I've run the following command in the Ubuntu terminal - sudo apt-get install mono-develop Now how can I run *.vb and *.cs programs using the terminal - What is the command that need to be given? Does the syntax vary when we write code in Windows & Linux environment?

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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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  • Rails Plugin Installation Problem

    - by Steve
    When I tried to install the openid plugin, I do not get any confirmation msg about the installation.Even I specify some random .git plugin name, It does not give out any error. Can someone please tell me what about to do to rectify the problem? I used the following syntax ruby script/plugin install git://github.com/rails/open_id_authentication.git

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  • Javascript object list sorting by object property

    - by Constructor
    I need to do this: (sorry not in javascript syntax-still learning object language :) ) object=car attibutes:top-speed, brand.... now I want to sort the list of those cars in order by top-speed, brand... How do I do this (please note the solution must be javascript only, no php or other stuff) ?

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  • Calling function with 1 paremeter @ selector.

    - by Mr. McPepperNuts
    I want to call this guy -(void)addFavorite:(NSString *)favoriteToAdd at, @selector here action:@selector([addFavorite favoriteToAdd:@"string"])]; But I keep getting syntax error no matter which way I write it. Can someone point out the appropriate way to call this function? When it had no parameter and was "addFavorite," it worked fine.

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  • Where can I find some good tutorials for C++

    - by Rob
    My friend has convinced me to start learning some C++, so my question is simple: where can I find some good tutorials for it? But please don't link me to the usual dry boring tutorials that only tells you the function syntax, I need more thorough explanations. I get sidetracked very easily, and I need tutorials that are more on a human level, that I'll not only learn from, but enjoy reading as well. So I'd appreciate any links that would help :)

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