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  • class method as hash value

    - by demas
    I have this working code: class Server def handle(&block) @block = block end def do @block.call end end class Client def initialize @server = Server.new @server.handle { action } end def action puts "some" end def call_server @server.do end end client = Client.new client.call_server My Server will handle more then one action so I want to change code such way: class Server def handle(options) @block = options[:on_filter] end def do @block.call end end class Client def initialize @server = Server.new my_hash = { :on_filter => action } @server.handle(my_hash) end def action puts "some" end def call_server @server.do end end client = Client.new client.call_server It is incorrect code because action() method calls on create my_hash, but if I try to modify code to: my_hash = { :on_filter => { action } } i get error message. Is it possible to create hash with methods as hash values ?

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  • Why do the following expanded if shorthand statements not work in javascript?

    - by PeanutsMonkey
    This is my first attempt to write shorthand if statements however am befuddled by why the expanded versions don't work quite the way I imagined they would. Code 1 - Does not work if(document.getElementById == true) { alert("The document object model is supported by: " + navigator.appName); } Code 2 - Does work if(document.getElementById != false) { alert("The document object model is supported by: " + navigator.appName); } Code 3 - The shorthand that does work if(document.getElementById) { alert("The document object model is supported by: " + navigator.appName); } Why is that if I expand the shorthand in 3 to the first code sample not work and why does it work if I have it equal to != false?

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  • php include file issue using document root

    - by nithi
    I have used the following code to get the document root. $path = get_file_dir(); function get_file_dir() { global $argv; return realpath($argv[0]); } Below code includes config.php and config.php has the $setuprun variable with a value. if((file_exists("$path/admin/config.php"))) { include_once "$path/admin/config.php"; } if($setuprun=="true") { //do some code } In my system, it takes the document root like /home/myname/myfolder and the variable $setuprun has the value and the code works perfectly. But in another user's system, it shows the following error. Notice: Undefined variable: setuprun in /usr/local/www/chat/setup.php on line 22. He is using FreeBSD 8.2 Stable with MySQL 5, PHP5 and Apache 2.2. Can anyone please help me to solve this error?

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  • Nice way to break a reply up into pieces in ruby

    - by ChaosR
    Hello, I'm writing an IRCd. For this topic it doesn't really matter if you know much about IRC. Its a simple code style problem. Quick overview of the problem: No message may be longer than 512 characters If the message is more, it must be broken into pieces The NAMES reply sends all the nicknames of users on a channel, and quickly grows beyond 512 characters. I currently concocted this marvelous piece of code, it works perfectly. However, its just not "ruby-like". This piece of code is more what you expect in some piece of C code. # 11 is the number of all fixed characters combined in the reply pre_length = 11 + servername.length + mynick.length + channel.name.length list = [""] i = 0 channel.nicks.each do |nick, client| list[i+=1] = "" if list[i].length + nick.length + pre_length > 500 list[i] << "#{channel.mode_char(client)}#{client.nick} " end list.each { |l| send_numeric(RPL_NAMREPLY, channel.name, l.strip) } send_numeric(RPL_ENDOFNAMES, channel.name) So my question is, any ideas to do this more nicely? PS. code has been slightly modified to make it easier to understand out-of-context

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  • jQuery Plugin: Adding Callback functionality

    - by dclowd9901
    I'm trying to give my plugin callback functionality, and I'd like for it to operate in a somewhat traditional way: myPlugin({options}, function() { /* code to execute */ }); or myPlugin({options}, anotherFunction()); How do I handle that parameter in the code? Is it treated as one full entity? I'm pretty sure I know where I'd place the executory code, but how do I get the code to execute? I can't seem to find a lot of literature on the topic, so thanks in advance for your help.

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  • Javascript plugins design pattern like jQuery

    - by Marco Demaio
    Could someone write down a very simple basic example in javascript to conceptualize (and hopefully make me understand) how the jQuery plugin design pattern is done and how it works? I'm not interested in how creating plugin for jQuery (so no jQuery code here at all). I'm interested in a simple explanation (maybe with a bit of Javascript code) to explain how it is done the plugin concept. Plz do not reply me to go and read jQuery code, I tried, but I it's too complex, otherwise I would have not post a question here.

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  • Cannot resolve collation conflict in Union select

    - by phenevo
    Hi, I've got tqo queries: First doesn't work: select hotels.TargetCode as TargetCode from hotels union all select DuplicatedObjects.duplicatetargetCode as TargetCode from DuplicatedObjects where DuplicatedObjects.objectType=4 because I get error: Cannot resolve collation conflict for column 1 in SELECT statement. Second works: select hotels.Code from hotels where hotels.targetcode is not null union all select DuplicatedObjects.duplicatetargetCode as Code from DuplicatedObjects where DuplicatedObjects.objectType=4 Structure: Hotels.Code -PK nvarchar(40) Hotels.TargetCode - nvarchar(100) DuplicatedObjects.duplicatetargetCode PK nvarchar(100)

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  • What power do I have over my license?

    - by DavidG
    Say for example, I've written some code under GPL 3. My company wants to use that code for a commercial product. Am I allowed to then say to them that they can use it under LGPL/MIT or any other license? If so, would I then have to change the included header at the top of each file? If so, what is stopping someone else from changing the license on my code?

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  • MD5CryptoServiceProvider ComputeHash Issues between VS 2003 and VS 2008

    - by owensoroke
    I have a database application that generates a MD5 hash and compares the hash value to a value in our DB (SQL 2K). The original application was written in Visual Studio 2003 and a deployed version has been working for years. Recently, some new machines on the .NET framework 3.5 have been having unrelated issues with our runtime. This has forced us to port our code path from Visual Studio 2003 to Visual Studio 2008. Since that time the hash produced by the code is different than the values in the database. The original call to the function posted in code is: RemoveInvalidPasswordCharactersFromHashedPassword(Text_Scrub(GenerateMD5Hash(strPSW))) I am looking for expert guidance as to whether or not the MD5 methods have changed since VS 2K3 (causing this point of failure), or where other possible problems may be originating from. I realize this may not be the best method to hash, but utimately any changes to the MD5 code would force us to change some 300 values in our DB table and would cost us a lot of time. In addition, I am trying to avoid having to redeploy all of the functioning versions of this application. I am more than happy to post other code including the RemoveInvalidPasswordCharactersFromHashedPassword function, or our Text_Scrub if it is necessary to recieve appropriate feedback. Thank you in advance for your input. Public Function GenerateMD5Hash(ByVal strInput As String) As String Dim md5Provider As MD5 ' generate bytes for the input string Dim inputData() As Byte = ASCIIEncoding.ASCII.GetBytes(strInput) ' compute MD5 hash md5Provider = New MD5CryptoServiceProvider Dim hashResult() As Byte = md5Provider.ComputeHash(inputData) Return ASCIIEncoding.ASCII.GetString(hashResult) End Function

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  • What's a quick and dirty way to get a user list with login time from active directory?

    - by Andrei D
    Im trying to obtain a list of users with their login time (n times if they have logged in more than once) in a particular timespan, for example between 2pm and 3pm on 10/10/2012. I've been fiddling around with powershell, but couldn't get much out of it, downloaded the PowerShell extensions from Quest, tried out some snippets, but I couldn't find something that fits my needs. My guess is to query the events on the Active Directory server but haven't been able to get a snippet that works so far.

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  • Hot to log in to a website using installed twill?

    - by brilliant
    Hello, everybody!!!! I have just successfully installed TWILL on my computer with the help of one very supportive member of "StackOverflow" (you can check it out HERE) and have tried to run one of the simple examples on the twill documentation page (you can see that page HERE). Here is that example: Let's say my username on www.slash.org is lynxye and my password is mammal. When I try to enter that exanple code into my Python prompt, I can only enter the first line of the code bexcause when I click on "Enter" to start a new line, I get some error messages right away: The same happens when I try to enter this code into my terminal: I think I miss out on some basics here. Perhaps, I need to create a file that would contain that code and then run that file somehow, but I really don't know where I need to create that file and with what extensdion. Can anyone, please, help me with this?

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  • C# how to do <enter> on barcode?

    - by RJ1516
    I have a combination of ItemNo and LotNo value. Example : ItemNo: I123 LotNo : L12345 Barcode Value is: "I123L12345" I want to put the value of ItemNo to txtItemNo.Text and LotNo to txtLotNo.Text How can I instruct the barcode to do Carriage Return or Enter so that I can be able to input 2 values on one Barcode scan. My barcode supports CODE 128, CODE 3of9 and CODE 93. Thanks in advance.

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  • Where are graphically pleasing examples of Lists

    - by slim
    Anyone know of good code examples of how to make lists look different than your everyday average black list or more graphically pleasing than you usually see in android apps. I've looked through google code but haven't found too many. I'm looking for different and eye catching lists. I hope this question isn't too generic. Also i'm open to anything, code, examples, blog posts, etc, you name it. I've really struggled with lists and making them look more snazzy. I'm talking more the code level not the graphics or icons used.

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  • Can I optimize this at all?

    - by Moshe
    I'm working on an iOS app and I'm using the following code for one of my tables to return the number of rows in a particular section: return [[kSettings arrayForKey:@"views"] count]; Is there any other way to write that line of code so that it is more memory efficient? EDIT: kSettings = NSUserDefaults standardUserDefaults. Is there any way to rewrite my line of code so that whatever memory it occupies is released sooner than it is released now?

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  • sql query returns incorrect result

    - by reza saberi
    I have a mysql database that stores quotation documents with some products that are clearly defining the price of each product in them, and a table for contracts storing contract details as well as customer code and quotation code to which it belongs. I have the following query to see how much is the total price of the quotation to write it in the invoice: select sum(sqproducts.price * sqproducts.quantity) as 'total-price', squotations.currency as 'currency' from sqproducts, ccontracts, squotations where sqproducts.contracted=1 AND squotations.code=sqproducts.quotation_code AND sqproducts.quotation_code=ccontracts.squotation_code AND sqproducts.quotation_code='QUOT/2012/1' group by currency

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  • Internal class and access to external members.

    - by Knowing me knowing you
    I have question with this same title here but now as I'll present in code below this seems to behave in the opposite way to the way explained to me in my first question with the same title. Ok code: class LINT_rep { private: char* my_data_; //stores separately every single digit from a number public: class Iterator:public iterator<bidirectional_operator_tag,char*> { Iterator(const LINT_rep&); }; }; #include "StdAfx.h" #include "LINT_rep.h" LINT_rep::Iterator::Iterator(const LINT_rep& owner):myData_(nullptr) { myData_ = owner.my_data_; /* HERE I'M ACCESSING my_data WHICH IS PRIVATE AND THIS CODE COMPILES ON VS2010 ULTIMATE BUT IT SHOULDN'T BECAUSE my_data IS PRIVATE AND OTHER CLASS SHOULDN'T HAVE ACCESS TO IT'S PRIVATE MEMB. AS EXPLAINED TO ME IN QUESTION TO WHICH I;VE PROVIDED LINK. */ } Question in the code. Thanks.

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  • Where a developer can sell / donate his time?

    - by kyrisu
    Recently business isn't good and was wondering what are your favourite places where you can sell your time working on a projects (you get specification / idea - you crank code - you get paid :) ) (I don't mean selling your own apps, just working for someone else) or where you can donate your time (you get specification - you crank code - you feel good :D) (I've heard about cranking code on weekends for charities in US but I'm from Poland so I was thinking about something not location specific)

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  • Recommendations for IPC between parent and child processes in .NET?

    - by Jeremy
    My .NET program needs to run an algorithm that makes heavy use of 3rd party libraries (32-bit), most of which are unmanaged code. I want to drive the CPU as hard as I can, so the code runs several threads in parallel to divide up the work. I find that running all these threads simultaneously results in temporary memory spikes, causing the process' virtual memory size to approach the 2 GB limit. This memory is released back pretty quickly, but occasionally if enough threads enter the wrong sections of code at once, the process crosses the "red line" and either the unmanaged code or the .NET code encounters an out of memory error. I can throttle back the number of threads but then my CPU usage is not as high as I would like. I am thinking of creating worker processes rather than worker threads to help avoid the out of memory errors, since doing so would give each thread of execution its own 2 GB of virtual address space (my box has lots of RAM). I am wondering what are the best/easiest methods to communicate the input and output between the processes in .NET? The file system is an obvious choice. I am used to shared memory, named pipes, and such from my UNIX background. Is there a Windows or .NET specific mechanism I should use?

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  • How do I execute queries upon DB connection in Rails?

    - by sycobuny
    I have certain initializing functions that I use to set up audit logging on the DB server side (ie, not rails) in PostgreSQL. At least one has to be issued (setting the current user) before inserting data into or updating any of the audited tables, or else the whole query will fail spectacularly. I can easily call these every time before running any save operation in the code, but DRY makes me think I should have the code repeated in as few places as possible, particularly since this diverges greatly from the ideal of database agnosticism. Currently I'm attempting to override ActiveRecord::Base.establish_connection in an initializer to set it up so that the queries are run as soon as I connect automatically, but it doesn't behave as I expect it to. Here is the code in the initializer: class ActiveRecord::Base # extend the class methods, not the instance methods class << self alias :old_establish_connection :establish_connection # hide the default def establish_connection(*args) ret = old_establish_connection(*args) # call the default # set up necessary session variables for audit logging # call these after calling default, to make sure conn is established 1st db = self.class.connection db.execute("SELECT SV.set('current_user', 'test@localhost')") db.execute("SELECT SV.set('audit_notes', NULL)") # end "empty variable" err ret # return the default's original value end end end puts "Loaded custom establish_connection into ActiveRecord::Base" sycobuny:~/rails$ ruby script/server = Booting WEBrick = Rails 2.3.5 application starting on http://0.0.0.0:3000 Loaded custom establish_connection into ActiveRecord::Base This doesn't give me any errors, and unfortunately I can't check what the method looks like internally (I was using ActiveRecord::Base.method(:establish_connection), but apparently that creates a new Method object each time it's called, which is seemingly worthless cause I can't check object_id for any worthwhile information and I also can't reverse the compilation). However, the code never seems to get called, because any attempt to run a save or an update on a database object fails as I predicted earlier. If this isn't a proper way to execute code immediately on connection to the database, then what is?

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  • PHP script cannot be read in PLESK

    - by Tony Rayland
    Dear All, Any help would be appreciated since I really can't figure out what happen. I made some PHP scripts that are working normal locally, but when I upload into PLESK suddenly the code inside the tag is not being read and the same goes to the HTML code below it (only the html code that is above the php tag is being read). Thanks before for all your help.

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  • Is there a command line C++ to PDF converter with syntax highlighting?

    - by NoMoreZealots
    I need to supply "Source code documents w/ Line numbers" which is essentially just a PDF of the source code with syntax highlighting and Line numbers. Is there any existing command line tools for windows that I could call from a script as a "build release version" script? Right now I'm doing it manually using VC++, which isn't even the dev enviroment the code is for a TI processor, and a PDF printer driver, which has a pop up for each file I print.

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  • How to view my Android app created database, via my android app?

    - by suufang
    I'm creating an application that collects users location (Cell broadcast location code) and saves that location with a name of users option, for example say my CB location code is 546034, now my app allows me to store that location code with a name of my choice say 'Home'. So, essentially my app has that following modules, To collect users CB location. To collect a custom name from user of that location. To store these values in a database. I've succeeded in doing all the above modules. I have a sub-module for my third module which has an option for user, of showing and deleting the database values, the screen shot looks as follows, Now, Users should be able to view and delete entries when he chooses the option 'View my database of locations' I've learned how to query my database values and I'm stuck with creating a list view and providing the delete option. My code for getting the database values and querying values goes as follows, submit.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { String locname = name.getText().toString(); if(locname.length()==0) { Toast.makeText(getBaseContext(), "Please enter the location name, for example 'Home'.", Toast.LENGTH_LONG).show(); } else { SQLiteDatabase cd = openOrCreateDatabase("mydata", MODE_WORLD_READABLE, null); cd.execSQL("CREATE TABLE IF NOT EXISTS MLITable (CblocationCode INT(10), CblocationName VARCHAR);"); cd.execSQL("INSERT INTO MLITable VALUES ('"+str+ "','"+locname+ "');"); cd.close(); Toast.makeText(getBaseContext(), "value successfully entered.", Toast.LENGTH_LONG).show(); } } }); viewdb.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { // here comes the code for viewing the database and deleting SQLiteDatabase db = openOrCreateDatabase("mydata", MODE_WORLD_READABLE, null); Cursor c = db.rawQuery("SELECT * FROM MLITble", null); db.close(); } }); I can see that I've read the table values, but I'm not able to create a display for those values. Help required. Thank you.

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