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  • Using PyLab to create a 2D graph from two separate lists

    - by user324333
    Hey Guys, This seems like a basic problem with an easy answer but I simply cannot figure it out no matter how much I try. I am trying to create a line graph based on two lists. For my x-axis, I want my list to be a set of strings. x_axis_list = ["Jan-06","Jul-06","Jan-07","Jul-07","Jan-08"] y_axis_list = [5,7,6,8,9] Any suggestions on how to best graph these items?

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  • Which programming languages support constant methods?

    - by Derek Mahar
    Which programming languages other than C++ support the concept of a constant class method? That is, what languages allow the programmer to constrain a method in such a way that it is guaranteed not to change the state of an object to which the method is applied? Please provide examples or references in your answer.

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  • Best XML Parser for RSS Feeds in Objective C ?

    - by Ansari
    Hi all, I am going to develop an application which will parse the RSS feeds and display the items in my custom cell.(Cell containing the image, label, description, etc). The most popular way of parsing is using the NSXMLParser. But this is bit of a lengthy way. So is there any other way to do this. Or my question will be, which is the best xml parser for objective-c ?

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  • Accidental Complexity in OpenSSL HMAC functions

    - by Hassan Syed
    SSL Documentation Analaysis This question is pertaining the usage of the HMAC routines in OpenSSL. Since Openssl documentation is a tad on the weak side in certain areas, profiling has revealed that using the: unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len, const unsigned char *d, int n, unsigned char *md, unsigned int *md_len); From here, shows 40% of my library runtime is devoted to creating and taking down **HMAC_CTX's behind the scenes. There are also two additional function to create and destroy a HMAC_CTX explicetly: HMAC_CTX_init() initialises a HMAC_CTX before first use. It must be called. HMAC_CTX_cleanup() erases the key and other data from the HMAC_CTX and releases any associated resources. It must be called when an HMAC_CTX is no longer required. These two function calls are prefixed with: The following functions may be used if the message is not completely stored in memory My data fits entirely in memory, so I choose the HMAC function -- the one whose signature is shown above. The context, as described by the man page, is made use of by using the following two functions: HMAC_Update() can be called repeatedly with chunks of the message to be authenticated (len bytes at data). HMAC_Final() places the message authentication code in md, which must have space for the hash function output. The Scope of the Application My application generates a authentic (HMAC, which is also used a nonce), CBC-BF encrypted protocol buffer string. The code will be interfaced with various web-servers and frameworks Windows / Linux as OS, nginx, Apache and IIS as webservers and Python / .NET and C++ web-server filters. The description above should clarify that the library needs to be thread safe, and potentially have resumeable processing state -- i.e., lightweight threads sharing a OS thread (which might leave thread local memory out of the picture). The Question How do I get rid of the 40% overhead on each invocation in a (1) thread-safe / (2) resume-able state way ? (2) is optional since I have all of the source-data present in one go, and can make sure a digest is created in place without relinquishing control of the thread mid-digest-creation. So, (1) can probably be done using thread local memory -- but how do I resuse the CTX's ? does the HMAC_final() call make the CTX reusable ?. (2) optional: in this case I would have to create a pool of CTX's. (3) how does the HMAC function do this ? does it create a CTX in the scope of the function call and destroy it ? Psuedocode and commentary will be useful.

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  • Get Cell RSSI(Network Signal Strength) on Android 1.5

    - by Brandon
    Is there any way to retrieve the current cellular Signal Strength (RSSI) on Android 1.5? I know there's a way to listen for signal strength updates through the TelephonyManager, but this seems to only give a "state," not a numeric value. Is using the RSSI field on a neighboring cell fairly accurate? I'm guessing not, but I'm running out of ideas.

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  • DShow : Enumeration sequence of IEnumMoniker

    - by KenC
    Hello, This is a question about DirectShow IEnumMoniker. Out of some reason, I have to know "what kind of order" IEnumMoniker enumerates items. (I mean, it's alphabetically or...?) The following pages are documents about IEnumMoniker, however, it doesn't mention about this : http://msdn.microsoft.com/en-us/library/ms692852(v=VS.85).aspx http://msdn.microsoft.com/en-us/library/dd407292%28VS.85%29.aspx If anybody has the idea about the enumeration sequence, please let me know. Thanks a lot.

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  • Silverlight (RIA Services) spontaneous culture changing

    - by Marc Wittke
    My RIA enabled Silverlight Application is setting the thread culture in the App constructor (this is absolutley okay since it is an intranet application and will never ever be used by someone who is not german): public App() { InitializeComponent(); Thread.CurrentThread.CurrentCulture = new CultureInfo("de-DE"); } It does what it should, the DataForms are displaying datetime values in german notation. BUT: it is spontaneously changing to en-US notation when navigating between items in the data source that is bound to the DataForm. Why?

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  • sql server modify error

    - by Jaspal
    hi, i m not able to modify table in SQL server. i m new to databases. use work go alter table employee modify id varchar(20) error message is- Msg 102, Level 15, State 1, Line 1 Incorrect syntax near 'modify' here is an screenshot thanks

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  • adding child nodes to a treeview control in wpf,c#

    - by ebhakt
    Hi , i have implemented a treeview control on a buttonclick event like this: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using System.Collections.ObjectModel; namespace TaxonomyTreeview { /// /// Interaction logic for Window1.xaml /// public partial class Window1 : Window { ObservableCollection _TaxonomyCollection = new ObservableCollection(); public Window1() { InitializeComponent(); } private void Window_Loaded(object sender, RoutedEventArgs e) { } public ObservableCollection<TaxonomyData> TaxonomyCollection { get { return _TaxonomyCollection; } } private void SelectedTaxonomyChanged(object sender, RoutedPropertyChangedEventArgs<Object> e) { TaxonomyData taxo = taxonomytree.SelectedItem as TaxonomyData; if (taxo != null) { MessageBox.Show("" + taxo.Tid); } } public class TaxonomyData { private string _name; private string _tid; public string Tid { get { return _tid; } set { _tid = value; } } public string Name { get { return _name; } set { _name = value; } } public TaxonomyData(string name, string tid) { Name = name; Tid = tid; } } private void populate_Click(object sender, RoutedEventArgs e) { taxonomytree.Items.Clear(); TaxonomyCollection.Add(new TaxonomyData("Taxonomy1", "1")); taxonomytree.Items.Add(TaxonomyCollection[0]); } } } The xaml code is : <TextBox Height="23" Margin="20,9,0,0" Name="startvid" VerticalAlignment="Top" HorizontalAlignment="Left" Width="120" /> <TextBox Height="23" Margin="165,9,151,0" Name="endvid" VerticalAlignment="Top" /> <Button Height="23.78" HorizontalAlignment="Right" Margin="0,8.22,11,0" Name="populate" VerticalAlignment="Top" Width="115" Click="populate_Click">Populate</Button> <TreeView HorizontalAlignment="Left" Margin="20,53,0,144" Width="120" Name="taxonomytree" ItemsSource="{Binding Window1.TaxonomyCollection}" SelectedItemChanged="SelectedTaxonomyChanged"> <TreeView.ItemTemplate> <DataTemplate> <TextBlock Text="{Binding Path=Name}" /> </DataTemplate> </TreeView.ItemTemplate> </TreeView> </Grid> As i want to display, the structure in a hierarchy , i want to know what is the best method to add a child node to this Please help

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  • Powershell .CopyHere if it already exists work around

    - by Bruce227
    Hi, I run the following to unzip and want to over write the current files if they exist but the microsoft solution found here(http://msdn.microsoft.com/en-us/library/ms723207%28VS.85%29.aspx) doesn't seem to work. I haven't found anything that says it works so is there a work around to select the 'yes to all' option? $zipPackage = (new-object -com shell.application).NameSpace($zipfilename) $destinationFolder = (new-object -com shell.application).NameSpace($destination) $destinationFolder.CopyHere($zipPackage.Items(),16) Thanks

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  • Are vb.net eventArgs maintained at a "system" level?

    - by GregH
    I have a custom developed control I am using that somebody else wrote. For some reason, when the control was written, they did not write an event handler for the "mouseDown" event so when I mouseDown on the control, no event is fired. What I am basically trying to do is capture which mouse button (left or right) is pressed when the control is clicked on. Is there any sort of system level objects that maintain system state (including which mouse buttons are currently being pressed regardless of the control being clicked upon?)

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  • Keyword search on all columns of multiple tables in sql server

    - by hiralshah
    Dear all, We are maintaining the profile information’s (like profile first name, last name, address, city, state, age, religion, occupation, education, etc….) from tbl_profie table in sql server. The users can search profiles using any keywords like Example 1: MBBS, Delhi, India Example 2: MBA, Delhi, cricket Example 3 : London, Hindu Tbl_profile table defending some parent table like Tbl_city, Tbl_state, Tbl_country, Tbl_occupation, Tbl_education tables, etc. So how to fetch user search results from Tbl_profile and profiles related tables using user’s keyword with easiest way.

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  • ASP.Net ViewState doesn't work when Control become Enable=False

    - by Daok
    Why when a control does contain value but it's set to .Enable=False that all controls become disable (that's ok) but why that the ViewState doesn't retain the data on the next post back? If I get the UserControl without modifing its Enable state, the ViewState work between post back. How can we disable a UserControl that all its control become disable (this part work) but all of them KEEP use the ViewState (this doesn't work)?

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  • Extending the SketchFlow player

    - by Aravind
    I would like to add some controls to the SketchFlow player. For example, I would like to add a combo box with a list of values for a specific variable, and selecting a value will make a specific screen/state show up in the SketchFlow player canvas. Is this possible? I have seen that using the PlayerContext allows access to some controls/events in the Player, but I am not sure how extensible the Player itself is.

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  • What's your experience with Flash drives?

    - by Jon Ericson
    EMC is marketing Solid State Flash Drives and my project is thinking about moving that direction in the future. Does anyone have any experience with replacing traditional disk storage with flash drives? Besides price, have you experienced any downsides to the technology?

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  • editing Rnw in Emacs, gets confused if in math mode or not

    - by stevejb
    When editing .Rnw files with emacs, sometimes it gets confused as to if I am in math mode or not. Then, the syntax highlighting gets messed up, and C-f-i inserts \textit{} and \mathit{} opposite to how it normally should. Is seems like there is some bool storing the state of math mode or not, and it gets inadvertently flipped. Is there a way I can manually flip it back?

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  • Repeating procedure for every item in class

    - by Hendriksen123
    Data.XX.NewValue := Data.XX.SavedValue; Data.XX.OldValue := Data.XX.SavedValue; I need to do the above a large number of times, where XX represents the value in the class. Pretending there were 3 items in the list: Tim, Bob, Steve. Is there any way to do the above for all three people without typing out the above code three times? (Data is a class containing a number of Objects, each type TList, which contain OldValue, NewValue and SavedValue)

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  • Making a Web Gui to design a Garden Layout

    - by paddydub
    I would like to design a web page Gui where users can design a simple interactive garden. The user would pick a template design and receive price estimates based on the design template and the dimensions entered. I'd like the user to be able to move items such as plants, stones and be able to adjust the dimensions of the grass, paving. I'm thinking i could make it using flash but I would like to know there are any other ways I could use to implement this?

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