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  • Is this ruby code thread safe?

    - by Ben K.
    Is this code threadsafe? It seems like it should be, because @myvar will never be assigned from multiple threads (assuming block completes in < 1s). But do I need to be worried about a situation where the second block is trying to read @myvar as it's being written? require 'rubygems' require 'eventmachine' @myvar = Time.now.to_i EventMachine.run do EventMachine.add_periodic_timer(1) do EventMachine.defer do @myvar = Time.now.to_i # some calculation and reassign end end EventMachine.add_periodic_timer(0.5) do puts @myvar end end

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  • Variable declarations in header files - static or not?

    - by Rob
    When refactoring away some #defines I came across declarations similar to the following in a C++ header file: static const unsigned int VAL = 42; const unsigned int ANOTHER_VAL = 37; The question is, what difference, if any, will the static make? Note that multiple inclusion of the headers isn't possible due to the classic #ifndef HEADER #define HEADER #endif trick (if that matters). Does the static mean only one copy of VAL is created, in case the header is included by more than one source file?

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  • Can I use PHP for a mobi site?

    - by kielie
    Hi guys, I have been doing some research on mobile websites, and thus far it seems to me that PHP is not supported by most handsets. I am trying to create multiple form's that lead up to a auto email response, which would be fairly simple if I could use PHP. Is there any other way of achieving this?

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  • Rails - Any plugins for building a online quiz/test?

    - by ChrisWesAllen
    Hello guys, I'm trying to add some online tests to my site and before I rolled up my sleeves I was wondering if there is any ruby on rails plugin support for such a task. Essentially I'm looking for something that lets me add multiple choice questions. Performing the scoring logic would be an added bonus. Any one know of anything?

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  • Reset Particular Input Element in a HTML Form

    - by SKR
    I have multiple input textboxes in my page. I want to reset particular text box to its onload state if certain conditions fails. I am considering using a Hidden element to store the onload state of the textbox. I would other suggestions or solutions to resolve this issue.

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  • Writing white space to CSV fields in Python?

    - by matt
    When I try to write a field that includes whitespace in it, it gets split into multiple fields on the space. What's causing this? It's driving me insane. Thanks data = open("file.csv", "wb") w = csv.writer(data) w.writerow(['word1', 'word2']) w.writerow(['word 1', 'word2']) data.close() I'll get 2 fields(word1,word2) for first example and 3(word,1,word2) for the second.

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  • Redirect to a web server depending on location with nginx

    - by fceruti
    Im working on a web site that has to be reachable from many countries under the same domain. Id like to know how can I receive a request with nginx (or any other static file server), and send it to different web servers depending on IP's location. I mean, what is the point on having multiple db machines on country A and B, if the server that serves you the page is chosen by round robin. Maybe theres another solution to my problem, and I would be very happy if someone can explain it to me.

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  • Sprite to Line Collision

    - by Alu
    If I have a sprite, how would I check collision between two points? For example, in a game I am making, I would like to draw multiple lines that my sprite collides against. I'm thinking that this is more flexible than other collision systems if I had a lot of platforms.

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  • How to surpress screen savers on Linux?

    - by Die in Sente
    I need to prevent the screen saver from running while my application is running. I know how to do this on the Windows versions, with SendInput calls, but I need to do something similar for Linux ports. It looks complicated, because ideally, I'd like something that would work on multiple Linux distros (SuSe, Red Hat, Ubunutu...) and it looks like there are at least 3 different screen-saver frameworks: xscreensaver, gnome-screensaver, and something else in KDE.

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  • C# Multi-Comparisons possible?

    - by Iggy Ma
    is it possible in some way to compare multiple variables to one constant in a if statement? It would be very helpful if instead of if ( col.Name != "Organization" && col.Name != "Contacts" && col.Name != "Orders" ) { } I could just say if ( col.Name != "Organization" || "Contacts" || "Orders" ) { } And I know I could use a list but in some instances I dont want to... Thanks!

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  • Multi-Select Dropdown with size of 1

    - by Thomas
    Is there any way of creating a combo box (<select>) with a size of 1? All the examples I can find allow for multiple selects but with a number of options visible at any one time. If this cannot be accomplished with bog standard HTML is it possible in a JS library such as JQuery?

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  • cPanel/WHM IP Ban - How to Unban IP

    - by Loren
    We are using htaccess basic authentication on one of our sites. One of our clients tried accessing the site and failed logging in multiple times. Now when visiting our site they simply get a "Can't Display Webpage" error. I believe I've had this before and I believe there IP's got banned after so many failures. I'm not sure where to go in WHM/cPanel to unban them - appreciate any assistance!! Thanks Loren

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  • Windows Phone 7: Existing Libraries Not Supported?

    - by Peterdk
    I was hoping it was as easy as referencing my existing libraries to use them with WP7. However, it complains about not able to load them because of .Net CF when I actually use them. Do i need to recompile them to .NET CF or something? I thought the big plus of WP7 was: leveraging your existing codebase...? How can I leverage my existing codebase if I need to strip everything out of it and maintain multiple versions?

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  • UItableView Problem in deleting items from database

    - by Arun Sharma
    Hi All, I am using in UitableView database.My table view works successfully (add single item,add multiple item,delete all) only problem is there when i want to delete single item for this i using Uitableview edit option. so how i add database method for deleting single item from database and also from table view. Please help me.

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  • How do I tag files in a directory in a SVN repository with a global version number that will appear

    - by mithaldu
    I am working on a project that stores multiple versions in the same svn repo but in different directories. For ease of reference for the coders working on the project I'd like to be able to add a commented tag similarly to # $Revision: 144 $ However, instead of the file revision it should contain a simple version number like so: # $Version: 1.63 $ # $Version: 1.64 $ # $Version: 2.0 $ Is there a way to get subversion to do this automatically for a specific directory and all sub-directories as well as for any new files added to those?

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  • How to keep alive an HttpModule (a.k.a register it as a singleton)

    - by Micah
    I pretty sure I've seen this somewhere but I can't seem to find it anywhere. I have an HttpModule that can be used across multiple requests. In other words instead of creating a new instance of the Module on every request it only ever needs to create it once. Does this ring a bell to anyone? If so, what's the method for configuring to work this way?

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  • Configuration Element Collection Section

    - by Matt
    I would like to set up a custom app configuration element collection section like this <logSectionGroup> <logSection name="Testttt"> <properties name ="Pride"> <pathName="TestingLog.txt"/> <deleteRetention="100"/> <deleteZeroRetention="5"/> <wildcard="*.txt"/> </properties> <properties name ="Adhoc"> <pathName="blah.txt"/> <deleteRetention="70"/> <deleteZeroRetention="3"/> <wildcard="*.*"/> </properties> </logSection> </logSectionGroup> Is this possible? Properties would be the configuration element, and log section would be the configuration element collection. The problem is, I've only seen where you can have multiple instances of a single element instead of multiple elements. <Section name="Section1"> <Section name="Section1"> <SubSection name="SubSection1"> <Item name="Item1" /> <Item name="Item2" /> </SubSection> <SubSection name="SubSection2"> <Item name="Item1" /> <Item name="Item2" /> </SubSection> </Section> When you use GetElementKey() you have it return element "name" in the above example but how would you return 4 different elements like "pathName" "deleteRetention" etc. Here is my Definition for PropElement Public Class PropElement Inherits ConfigurationElement <ConfigurationProperty("pathName", IsRequired:=True)> _ Public Property PathName() As String Get Return CStr(Me("pathName")) End Get Set(ByVal value As String) Me("pathName") = value End Set End Property <ConfigurationProperty("deleteRetention", DefaultValue:="0", IsRequired:=False)> _ Public Property DeleteRetention() As Integer Get Return CStr(Me("deleteRetention")) End Get Set(ByVal value As Integer) Me("deleteRetention") = value End Set End Property <ConfigurationProperty("deleteZeroRetention", DefaultValue:="0", IsRequired:=False)> _ Public Property DeleteZeroRetention() As Integer Get Return CStr(Me("deleteZeroRetention")) End Get Set(ByVal value As Integer) Me("deleteZeroRetention") = value End Set End Property <ConfigurationProperty("wildcard", DefaultValue:="*.*", IsRequired:=False)> _ Public Property Wildcard() As String Get Return CStr(Me("wildcard")) End Get Set(ByVal value As String) Me("wildcard") = value End Set End Property End Class

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  • Split with token info

    - by boomhauer
    I would like to split a string using multiple chars to split upon. For example, consider spin text format: This is a {long|ugly|example} string I would want to parse this string and split it on the "{", "|", and "}" chars myString.Split('|','{','}') Now I have tokens to play with, but what I would like is to retain the info about which char was used to split each piece of the array that is returned. Any existing code that can do something like this?

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  • MySQL regexp on Indexes

    - by Vivek
    HI, I have query having multiple regexp in where clause. The coloumns contained in the where clause have already been indexed. But the query is not using the indexes. Does MySql regexp cause use of indexes ? If not, what could be the workaround for this ?

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  • Include ":" character in parameter using Apache's mod_rewrite

    - by travis
    I use something like that to pass to the parameter 'text' what follows after the domain RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ index.php?text=$1 [L,QSA] So if I have www.example.com/tralala I get $text='tralala' But I want it to be possible to have in the parameter the character ":" multiple times: www.example.com/me:you:him Can you give me a hand? If I test www.example.com/me:you:him I get the error: Forbidden You don't have permission to access /you:me:him on this server.

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