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• How do I determine which C/C++ compiler to use?

  - by Adam Siddhi

  Greetings, I am trying to figure out which C/C++ compiler to use. I found this list of C/C++ compilers at Wikipedia: http://en.wikipedia.org/wiki/List_of_compilers#C.2FC.2B.2B_compilers I am fairly certain that I want to go with an open source compiler. I feel that if it is open source then it will be a more complete compiler since many programmer perspectives are used to make it better. Please tell me if you disagree. I should mention that I plan on learning C/C++ mainly to program 2D/3D game applications that will be compatible with Windows, Linux, MAC and iPhone operating systems. I am currently using Windows Vista x64 OS. Thanks, Adam

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• What does the "build-essential" & "build-dep" Terminal commands mean & do in Linux based operating s

  - by Adam Siddhi

  Hi. I am researching how to install Ruby 1.9.1 in Xubuntu 10.04 and I came across the command build-essential and build-dep multiple times. Sometimes it is followed by packages and sometimes it is both preceded and post-ceded by packages. The 2 examples I am looking at are: sudo apt-get install build-essential zlib1g zlib1g-dev zlibc libruby1.9 libxml2 libxml2-dev libxslt-dev sudo apt-get build-dep ruby1.9 and sudo apt-get install ruby irb ri rdoc ruby1.8-dev libzlib-ruby libyaml-ruby libreadline-ruby libncurses-ruby libcurses-ruby libruby libruby-extras libfcgi-ruby1.8 build-essential libopenssl-ruby libdbm-ruby libdbi-ruby libdbd-sqlite3-ruby sqlite3 libsqlite3-dev libsqlite3-ruby libxml-ruby libxml2-dev Thanks :adam

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• Ruby: change each value in a hash with something like #collect for arrays?

  - by Adam Nonymous

  Hi! I'd like to replace each value in a hash with value.some_method. For example in a simple hash {"a" = "b", "c" = "d"} every value should be .upcase-d so it looks like {"a" = "B", "c" = "D"}. I tried #collect and #map but always just get arrays back. Is there an 'elegant' way to do this? Thanks in advance, Adam Nonymous UPDATE: Damn, I forgot: The hash is in an instance variable which should not be changed. I need a new hash with the changed values, but would prefer not to define that variable explicitly and then loop over the hash filling it. Something like new_hash = hash.magic {...} ;)

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• Encrypt text using a number

  - by Adam Matan

  Project Euler I have recently begun to solve some of the Project Euler riddles. I found the discussion forum in the site a bit frustrating (most of the discussions are closed and poorly-threaded), So I have decided to publish my Python solutions on launchpad for discussion. The problem is that it seems quite unethical to publish these solutions, as it would let other people gain reputation without doing the programming work, which the site deeply discourages. My Encryption problem I want to encrypt my answers so that only those who have already solved the riddles can see my code. The logical key would be the answer to the riddle, which is always numeric. In order to prevent brute-force attacks on my answers, I want to find an encryption algorithm that takes a significantly long time (few seconds) to run. Do you know any such algorithm? I would fancy a Python package, which I can attach to the code, over an external program that might have portability issues. Thanks, Adam

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• BeautifulSoup: Get the contents of a specific table

  - by Adam Matan

  Hi, My local airport disgracefully blocks users without IE, and looks awful. I want to write a Python scripts that would get the contents of the Arrival and Departures pages every few minutes, and show them in a more readable manner. My tools of choice are mechanize for cheating the site to believe I use IE, and BeautifulSoup for parsing page to get the flights data table. Quite honestly, I got lost in the BeautifulSoup documentation, and can't understand how to get the table (whose title I know) from the entire document, and how to get a list of rows from that table. Any ideas? Adam

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• Want to build simple SQL admin interface to change a few values in a table.

  - by Adam McC

  i am currently building a system in MSSQL 2K5. i have a table that holds information about certain insurance schemes such as overheads and other things. these values will change occasionally and currently i administer the database straight through the management Studio. i would like to build a simple interface that will allow my colleagues to change these values by selecting the company in a dropdown and the current values will populate. they can then edit these values and submit them to the database. is this possible in the current Visual Studio supplied with MSSQL server 2K5 or do i need to get another product. i am confident that with the help of stack overflow and google i can build this myself, but i need pointed in the right direction as to which environment would be easiest and best to start building it. Many thanks, adam

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• Rails and PostgreSQL: Role postgres does not exist

  - by Adam

  I have installed postgresql on my Mac OS Lion, and am working on a rails app. I use RVM to keep everything separate from my other rails apps. For some reason when I try to migrate the db for the first time rake cannot find the postgres user. I get the error FATAL: role "postgres" does not exist I have pgAdmin 3 so I can clearly see there is a postgres user in the DB - the admin account in fact - so I'm not sure what else to do. I read somewhere about people having issues with postgresql because of which path it was installed in, but then i don't think i would have gotten that far if it couldn't find the db. Any clues would be gratefully received! Thanks, Adam

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• Locking down multiple sites in Sitecore

  - by adam

  Hi I have two sites running under one Sitecore 6 installation. The home nodes of the sites are as such: /sitecore/content/Home /sitecore/content/Careers Assuming the primary site is at domain.com, the careers site can be accessed at careers.domain.com. My problem is that, by prefixing the uri with /sitecore/content/, any sitecore item can be accessed by either (sub)domain. For example, I can get to: http://domain.com/sitecore/content/careers.aspx (should be under careers.domain.com) http://careers.domain.com/sitecore/content/home/destinations.aspx (should be under domain.com). I know I can redirect these urls (using IIS7 Redirects or ISAPIRewrite) but is there any way to 'lock' Sitecore down to only serve items under the configured home node for that domain? Thanks, Adam

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• What does the "build-essential" Terminal command mean & do in Linux based operating systems like Ubu

  - by Adam Siddhi

  Hi. I am researching how to install Ruby 1.9.1 in Xubuntu 10.04 and I came across the command build-essential multiple times. Sometimes it is followed by packages and sometimes it is both preceded and post-ceded by packages. The 2 examples I am looking at are: sudo apt-get install build-essential zlib1g zlib1g-dev zlibc libruby1.9 libxml2 libxml2-dev libxslt-dev and sudo apt-get install ruby irb ri rdoc ruby1.8-dev libzlib-ruby libyaml-ruby libreadline-ruby libncurses-ruby libcurses-ruby libruby libruby-extras libfcgi-ruby1.8 build-essential libopenssl-ruby libdbm-ruby libdbi-ruby libdbd-sqlite3-ruby sqlite3 libsqlite3-dev libsqlite3-ruby libxml-ruby libxml2-dev Thanks :adam

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• How to run an .exe application in another computer?

  - by ADAM

  I am working on a C# application in Visual Studio 2013. When I run the .exe file from my computer, the application runs very well and all the features work. When I tried to run the .exe on another computer, the database side doesn't work well and the connection with the database couldn't be opened. The SqlConnection is constructed as follows: SqlConnection cn = new SqlConnection("Data Source=ADAM-PC;Initial Catalog=integrationdatabase;Integrated Security=True" I don't know how to change the data source to make the connection with the database established in another computer. How can I solve this problem?

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• Download a .asp / .asx video file (Ubuntu)

  - by Adam Matan

  Hi, My local TV station offers streaming video of recorded documentaries, using a XML-like file with a.asx extension. Is there a way (preferably Ubuntu CLI) to download the file? Thanks, Adam PS - the file contents: <asx version="3.0"> <!-- GMX --> <param name="encoding" value="utf-8" /> <title>CastUP: V0109-msheni-Hayim_Hefer-120510 </title> <MOREINFO HREF = "" /> <PARAM NAME="Prebuffer" VALUE="true" /> <entry> <ref href="http://s3awm.castup.net/server12/31/176/17607833-61.wmv?ct=IL&rg=BZ&aid=31&ts=0&cu=91A297E2-5359-416A-912B-2D9BC106E491" /> <ref href="http://s0dwm.castup.net/server12/31/176/17607833-61.wmv?ct=IL&rg=BZ&aid=31&ts=0&cu=91A297E2-5359-416A-912B-2D9BC106E491" /> <ref href="http://s0ewm.castup.net/server12/31/176/17607833-61.wmv?ct=IL&rg=BZ&aid=31&ts=0&cu=91A297E2-5359-416A-912B-2D9BC106E491" /> <ref href="http://s0fwm.castup.net/server12/31/176/17607833-61.wmv?ct=IL&rg=BZ&aid=31&ts=0&cu=91A297E2-5359-416A-912B-2D9BC106E491" /> <ref href="http://s0gwm.castup.net/server12/31/176/17607833-61.wmv?ct=IL&rg=BZ&aid=31&ts=0&cu=91A297E2-5359-416A-912B-2D9BC106E491" /> <PARAM NAME="CanSkipBack" VALUE="No"/> <PARAM NAME="CanSkipForward" VALUE="No"/> <PARAM NAME="CanSeek" VALUE="No"/> <title>mondial_2010 </title> <PARAM NAME="Prebuffer" VALUE="true" /> <PARAM NAME="CastUP_Content_Config" VALUE="" /> </entry> <entry> <PARAM NAME="EntryType" VALUE="Content" /> <param name="encoding" value="utf-8" /> <PARAM NAME="CastUP_AssociatedURL" VALUE="" /> <PARAM NAME="CastUP_Content_Config" VALUE="" /> <PARAM NAME="CastUP_Content_ClipMediaID" VALUE="5382858" /> <author>iba</author> <title>CastUP: V0109-msheni-Hayim_Hefer-120510 </title> <PARAM NAME="Prebuffer" VALUE="true" /> <ref href="mms://s3awm.castup.net/server12/31/174/17482045-61.wmv?ct=IL&rg=BZ&aid=31&ts=0&cu=91A297E2-5359-416A-912B-2D9BC106E491" /> <ref href="mms://s0dwm.castup.net/server12/31/174/17482045-61.wmv?ct=IL&rg=BZ&aid=31&ts=0&cu=91A297E2-5359-416A-912B-2D9BC106E491" /> <ref href="mms://s0ewm.castup.net/server12/31/174/17482045-61.wmv?ct=IL&rg=BZ&aid=31&ts=0&cu=91A297E2-5359-416A-912B-2D9BC106E491" /> <ref href="mms://s0fwm.castup.net/server12/31/174/17482045-61.wmv?ct=IL&rg=BZ&aid=31&ts=0&cu=91A297E2-5359-416A-912B-2D9BC106E491" /> <ref href="mms://s0gwm.castup.net/server12/31/174/17482045-61.wmv?ct=IL&rg=BZ&aid=31&ts=0&cu=91A297E2-5359-416A-912B-2D9BC106E491" /> </entry> </asx>

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• How can I insert an additional argument after the last argument in a prolog procedure?

  - by Meko

  I am new to learning prolog, and I want to know, if we have some procedure like father("Nic","Adam"). and I want to write a function that it will add new value to this father("Nic","Adam","something"..) how can I do this? Using list? Or what?

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• When are child views added to Layout/ViewGroup from XML

  - by JohnTube

  My question is : I want to know when does a xLayout (or ViewGroup in general) add a child view from XML ? And by "when" I mean at what point of code, in what "pass" of the "traversal" of the UI toolkit ? Which method of xLayout or ViewGroup should I override ? I have done my homework : I have watched the "Writing Custom Views For Android" presented (by Adam Powell and Romain Guy) in the last Google I/O and I have read Adam Powell comments on this Google+ post.

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• Problem installing Ubuntu 10.04 64 bit side by side with Vista by using a bootable USB drive. What n

  - by Adam Siddhi

  What happened I decided to install Ubuntu 10.04 64 bit side by side with Vista Home Premium (I guess on another partition) with a USB stick. I found instructions on how to do this here: https://help.ubuntu.com/community/Installation/FromUSBStick To create the bootable USB drive I had to download a program called Unetbootin. That process was simple enough. All I had to do was just choose the disk image option, select the ubuntu-10.04-desktop-amd64.iso image, make sure it recognizes my USB drive and then press OK. It takes only like a few minutes to create a working bootable USB drive. Then I have to restart my computer, enter the BIOS, select my USB drive as the first boot drive, save options and continue with booting up. After this Ubuntu actually loads up. I think this is known as the Live version of Ubuntu so you can try it out before fully installing it. Any ways, on the Ubuntu 10.04 desktop I saw an installer. I click it and begin the installation process. Just so you know, I tried installing it 2 times. I will explain what happened each time: The first time I tried installing Ubuntu 10.04 I got stuck at step 4 of 7. I remember selecting the last option in the window which was Specify Partitions Manually (Advanced) I made my partition for Ubuntu like 52 gigs. I clicked forward and a little pop up window appeared saying Please Wait. So the installation process stalled on this window so I closed out of it and quit the installation process. So at this point I was worried because I had already selected the partition size and assumed it started making it. Since it stalled I had to quit out though. Anyways, once again I reached step 4 of 7 a decided to select the first option which is Install them side by side choosing between them each startup. I figured this was the safe way to go. I did that and the pop up window saying Please Wait popped up again but lasted only like 10 seconds. Then I got to I guess step 6 where it asks you to enter your desired name and password. Did that and clicked forward. The Ubuntu 10.04 installation load screen appeared and the loading bar at the bottom started filling up. So I got to 83% and stalled during the Importing other profile information (I think it was called this. I had the option to do this during I think step 6) process. So at this point I decided to get stop the installation process. I was getting very nervous. I tried to restart the computer but all that happened was that Ubuntu restarted. I finally got the computer to restart. I was pretty sure I had screwed something up big time by this point. As my computer was restarting I entered BIOS again and switched back to it booting from my main hard drive containing Vista. Saved it and continued the boot process. My worst fears were confirmed as Vista would not boot up. I mean I saw the little Microsoft Windows choppy animated green loading bar at the bottom of the screen and then boom! It decided to restart. When it restarted I had the option to run a memory test check to see if there was anything that needed to be repaired. That took like 20 minutes and at the end I saw that I did indeed have to repair something. I had to go through 2 repair processes. After each I had to restart the computer. The 2nd time it went through the repair process it said that it could not fully repair the damage. I was scared and restarted but Vista did load up. I got to my desktop and saw a message saying something like Repairs have been made, Please restart for changes to take effect I noticed that some Notification icons were missing and I could not hear volume in a video. Things were a bit funky. So I did restart and here I am. Now what?! So since I got back into Vista and thankfully have a working Internet connection I am trying to find answers to my problem (that is why I am writing this post). I am scared that I have partioned my hard drive 2 times after researching Installing Ubuntu 10.04 and seeing this post http://techie-buzz.com/foss/ubuntu-10-04-lts-installation-guide.html The author shows screen shots of installing Ubuntu 10.04. He shows the image of step 4 of 7 with a caption at the bottom. I will recreate it below: Select a partitioning option. Unless you want to format all the hard drive and install Ubuntu afresh, select the last option and proceed. Questions If I have indeed partitioned my HD 2 times (which I am sure it is), how do I get to a point where I can see all my bad, unfinished Ubuntu partitions and get rid of them? How do I clean this big mess up? & How can I ensure that this mess will not happen next time I try installing Ubuntu 10.04? Thank you Adam

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• Sitecore not resolving rich text editor URLS in page renders

  - by adam

  Hi We're having issues inserting links into rich text in Sitecore 6.1.0. When a link to a sitecore item is inserted, it is outputted as: http://domain/~/link.aspx?_id=8A035DC067A64E2CBBE2662F6DB53BC5&_z=z Rather than the actual resolved url: http://domain/path/to/page.aspx This article confirms that this should be resolved in the render pipeline: in Sitecore 6 it inserts a specially formatted link that contains the Guid of the item you want to link to, then when the item is rendered the special link is replaced with the actual link to the item The pipeline has the method ShortenLinks added in web.config <convertToRuntimeHtml> <processor type="Sitecore.Pipelines.ConvertToRuntimeHtml.PrepareHtml, Sitecore.Kernel"/> <processor type="Sitecore.Pipelines.ConvertToRuntimeHtml.ShortenLinks, Sitecore.Kernel"/> <processor type="Sitecore.Pipelines.ConvertToRuntimeHtml.SetImageSizes, Sitecore.Kernel"/> <processor type="Sitecore.Pipelines.ConvertToRuntimeHtml.ConvertWebControls, Sitecore.Kernel"/> <processor type="Sitecore.Pipelines.ConvertToRuntimeHtml.FixBullets, Sitecore.Kernel"/> <processor type="Sitecore.Pipelines.ConvertToRuntimeHtml.FinalizeHtml, Sitecore.Kernel"/> </convertToRuntimeHtml> So I really can't see why links are still rendering in ID format rather than as full SEO-tastic urls. Anyone got any clues? Thanks, Adam

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• StyleCop XML Documentation Header - Using 3 /// instead of 2 //

  - by Adam Jenkin

  I am using XML documentation headers on my c# files to pass the StyleCop rule SA1633. Currently, I have to use the 2 slash commenting rule to allow StyleCop to recognize the header. for example: // <copyright file="abc.ascx.cs" company="MyCompany.com"> // MyCompany.com. All rights reserved. // </copyright> // <author>Me</author> This works fine for StyleCop, however I would like to use the 3 slash commenting rule to enable visual studio to understand the comments as XML and provide the XML functionality (highlighting, auto indenting etc) /// <copyright file="abc.ascx.cs" company="MyCompany.com"> /// MyCompany.com. All rights reserved. /// </copyright> /// <author>Me</author> The problem is that when using 3 slashes, StyleCop no longer see's the header and throws the SA1633 warning. Is there anyway to configure stylecop to understand the header is contained in XML using 3 slashes? Thanks, Adam

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• Errors with shotgun gem and msvcrt-ruby18.dll when running my Sinatra app

  - by Adam Siddhi

  Greetings, Every time I make a change to a Sinatra app I'm working on and try to refresh the browser (located at http://localhost:4567/) the browser will refresh and, the console window seems to restart the WEB brick server. The problem is that the content in the browser window does not change. A friend of mine told me it was a shotgun issue and referred me to rtomayko's shotgun gem: http://github.com/rtomayko/shotgun On this page I read that the shotgun gem would basically solve my problem, allowing the changes made to my app to show up in the browser window after I refresh it. So I installed the shotgun gem. The installation was successful. To activate the shotgun function you have to type shotgun before the file name. In this case my Sinatra app's file name is shortener.rb When I type shotgun shortener.rb to run my Sinatra app I get this error: C:\ruby\sinatrashotgun shortener.rb c:/Ruby19/lib/ruby/gems/1.9.1/gems/shotgun-0.6/bin/shotgun:137:in `': No such f ile or directory - uname (Errno::ENOENT) from c:/Ruby19/lib/ruby/gems/1.9.1/gems/shotgun-0.6/bin/shotgun:137:in block in ' from c:/Ruby19/lib/ruby/gems/1.9.1/gems/shotgun-0.6/bin/shotgun:136:in each' from c:/Ruby19/lib/ruby/gems/1.9.1/gems/shotgun-0.6/bin/shotgun:136:in find' from c:/Ruby19/lib/ruby/gems/1.9.1/gems/shotgun-0.6/bin/shotgun:136:in <top (required)>' from c:/Ruby19/bin/shotgun:19:inload' from c:/Ruby19/bin/shotgun:19:in `' I should also mention that before testing the shotgun method out to see if it worked, I installed the mongrel (I realize I should have checked to see if shotgun worked before doing this as installing mongrel has complicated this problem). So on top of getting the error message above I also get a pop up window from Ruby.exe saying: Ruby.exe - Unable to load component This application has failed to start because msvcrt-ruby18.dll was not found. Re-installing the application may fix this problem. I have no idea what msvcrt-ruby18.dll is but I know that installing either shotgun and/or mongrel created this problem. Where to go from here? Thanks, Adam

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• HOW TO: Draggable legend in matplotlib

  - by Adam Fraser

  QUESTION: I'm drawing a legend on an axes object in matplotlib but the default positioning which claims to place it in a smart place doesn't seem to work. Ideally, I'd like to have the legend be draggable by the user. How can this be done? SOLUTION: Well, I found bits and pieces of the solution scattered among mailing lists. I've come up with a nice modular chunk of code that you can drop in and use... here it is: class DraggableLegend: def __init__(self, legend): self.legend = legend self.gotLegend = False legend.figure.canvas.mpl_connect('motion_notify_event', self.on_motion) legend.figure.canvas.mpl_connect('pick_event', self.on_pick) legend.figure.canvas.mpl_connect('button_release_event', self.on_release) legend.set_picker(self.my_legend_picker) def on_motion(self, evt): if self.gotLegend: dx = evt.x - self.mouse_x dy = evt.y - self.mouse_y loc_in_canvas = self.legend_x + dx, self.legend_y + dy loc_in_norm_axes = self.legend.parent.transAxes.inverted().transform_point(loc_in_canvas) self.legend._loc = tuple(loc_in_norm_axes) self.legend.figure.canvas.draw() def my_legend_picker(self, legend, evt): return self.legend.legendPatch.contains(evt) def on_pick(self, evt): if evt.artist == self.legend: bbox = self.legend.get_window_extent() self.mouse_x = evt.mouseevent.x self.mouse_y = evt.mouseevent.y self.legend_x = bbox.xmin self.legend_y = bbox.ymin self.gotLegend = 1 def on_release(self, event): if self.gotLegend: self.gotLegend = False ...and in your code... def draw(self): ax = self.figure.add_subplot(111) scatter = ax.scatter(np.random.randn(100), np.random.randn(100)) legend = DraggableLegend(ax.legend()) I emailed the Matplotlib-users group and John Hunter was kind enough to add my solution it to SVN HEAD. On Thu, Jan 28, 2010 at 3:02 PM, Adam Fraser wrote: I thought I'd share a solution to the draggable legend problem since it took me forever to assimilate all the scattered knowledge on the mailing lists... Cool -- nice example. I added the code to legend.py. Now you can do leg = ax.legend() leg.draggable() to enable draggable mode. You can repeatedly call this func to toggle the draggable state. I hope this is helpful to people working with matplotlib.

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• WPF Update Binding when Bound directly to DataContext w/ Converter

  - by Adam

  Normally when you want a databound control to 'update,' you use the "PropertyChanged" event to signal to the interface that the data has changed behind the scenes. For instance, you could have a textblock that is bound to the datacontext with a property "DisplayText" <TextBlock Text="{Binding Path=DisplayText}"/> From here, if the DataContext raises the PropertyChanged event with PropertyName "DisplayText," then this textblock's text should update (assuming you didn't change the Mode of the binding). However, I have a more complicated binding that uses many properties off of the datacontext to determine the final look and feel of the control. To accomplish this, I bind directly to the datacontext and use a converter. In this case I am working with an image source. <Image Source="{Binding Converter={StaticResource ImageConverter}}"/> As you can see, I use a {Binding} with no path to bind directly to the datacontext, and I use an ImageConverter to select the image I'm looking for. But now I have no way (that I know of) to tell that binding to update. I tried raising the propertychanged event with "." as the propertyname, which did not work. Is this possible? Do I have to wrap up the converting logic into a property that the binding can attach to, or is there a way to tell the binding to refresh (without explicitly refreshing the binding)? Any help would be greatly appreciated. Thanks! -Adam

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• PostgreSQL: Auto-partition a table

  - by Adam Matan

  Hi, I have a huge database which holds pairs of numbers (A,B), each ranging from 0 to 10,000 and stored as floats. e.g., (1, 9984.4), (2143.44, 124.243), (0.55, 0), ... Since the PostgreSQL table which stores these pairs grew quite large, I have decided to partition it into inheriting sub-tables. I intend to create 100 such tables, each storing a range of 1000x1000. The problem is that these numbers tend to come in large chunks of nearby numbers. It means that in the future, some tables will be nearly empty and some will hold a very large portion of the database. Unfortunately, the distribution of future pairs is yet unknown. I am looking for a way to automatically repartition my table. That means that if a certain subtable holds more than a specific number of pairs, it will be automatically partitioned into four sub-sub tables, and so on. My questions are: Is recursive partitioning and inheritance possible in PostgreSQL 8.3? Will indexes and query plans understand it? What's the best way to split a subtable once it grew too large? I should point out that this isn't a live database, so a downtime of few hours every week is totally acceptable. Thanks in advance, Adam

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• Codility-like sites for code golfs

  - by Adam Matan

  Hi, I've run into codility.com new cool service after listening to one of the recent stackoverflow.com podcasts. In short, it presents the user with a programming riddle to solve, within a given time frame. The user writes code in an online editor, and has the ability to run the program and view the standard output. After final submission, the user sees its final score and which tests failed him. Quoting Joel Spolsky: You are given a programming problem, you can do it in Java, C++, C#, C, Pascal, Python and PHP, which is pretty cool, and you have 30 minutes. And it gives you an editor in a webpage. And you've got to just start typing your code. And it's going to time you, basically you have to do it in a certain amount of time. And it actually runs your code and determines the performance characteristics of your code. It is intended for job interview screenings, but the idea seems very cool for code-golfs and for practicing new languages. Do you know if there's any proper open replacement? Adam

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• Show cue banner for wpf ComboBox with grouping

  - by Adam Duston

  I have a ComboBox in my WPF form: <ComboBox Margin="75,0,15,102" Name="videoFormatCombo" Height="23" VerticalAlignment="Bottom" DataContext="{StaticResource GroupedVideoFormats}" ItemsSource="{Binding}" ItemTemplate="{StaticResource VideoFormatTemplate}"> <ComboBox.GroupStyle> <GroupStyle HeaderTemplate="{StaticResource GroupHeader}"/> </ComboBox.GroupStyle> </ComboBox> As you might be able to guess, GroupedVideoFormats is a CollectionViewSource with grouping. I need to get a cue banner to display for this ComboBox. I've attempted the solution that is (very verbosely) outlined in this blog post, but it will not work for a ComboBox with grouped data. The two solutions outlined in superfluousprefixhttp://stackoverflow.com/questions/2548757/how-can-the-blank-space-in-a-c-combobox-be-filled-as-a-hint-for-the-user are for Windows Forms ComboBoxes only, and won't work with WPF. If it would help to see all the original source, this particular form is on github: superfluousprefixhttp://github.com/8planes/mirovideoconverter/blob/master/MSWindows/Windows/FileSelect.xaml . It's an open-source project, so the entire project is on github: superfluousprefixhttp://github.com/8planes/mirovideoconverter/tree/master/MSWindows . Thank you for any advice! Adam P.S. stackoverflow wouldn't let me make more than one anchor tag in my post, hence the long urls with the superfluous prefix. Sorry!

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• How do I use a custom authentication mechanism for a Java web application with Spring Security?

  - by Adam

  Hi, I'm working on a project to convert an existing Java web application to use Spring Web MVC. As a part of this I will migrate the existing log-on/log-off mechanism to use Spring Security. The idea at this stage is to replicate the existing functionality and replace only the web layer, leaving the service classes and objects in place. The required functionality is simple. Access is controlled to URLs and to access certain pages the user must log on. Authentication is performed with a simple username and password along with an extra static piece of information that comes from the login page. There is no notion of a role: once a user has logged on they have access to all of the pages. Behind the scenes, the service layer has a class with a simple authentication method: doAuthenticate(String username, String password, String info) throws ServiceException An exception is thrown if the login fails. I'd like to leave this existing service object that does the authentication intact but to "plug it into" the Spring Security mechanism. Can somebody suggest the best approach to take for this please? Naturally, I'd like to take the path of least resistance and leave the work where possible to Spring... Thanks in advance, Adam.

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• Python many-to-one mapping (creating equivalence classes)

  - by Adam Matan

  Hi, I have a project of converting one database to another. One of the original database columns defines the row's category. This coulmn should be mapepd to a new category in the new databse. For example, let's assume the original categories are:parrot, spam, cheese_shop, Cleese, Gilliam, Palin Now that's a little verbose for me, And I want to have these rows categorized as sketch, actor - That is, define all the sketches and all the actors as two equivalence classes. >>> monty={'parrot':'sketch', 'spam':'sketch', 'cheese_shop':'sketch', 'Cleese':'actor', 'Gilliam':'actor', 'Palin':'actor'} >>> monty {'Gilliam': 'actor', 'Cleese': 'actor', 'parrot': 'sketch', 'spam': 'sketch', 'Palin': 'actor', 'cheese_shop': 'sketch'} That's quite awkward- I would prefer having something like: monty={ ('parrot','spam','cheese_shop'): 'sketch', ('Cleese', 'Gilliam', 'Palin') : 'actors'} But this, of course, sets the entire tuple as a key: >>> monty['parrot'] Traceback (most recent call last): File "<pyshell#29>", line 1, in <module> monty['parrot'] KeyError: 'parrot' Any ideas how to create an elegant many-to-one dictionary in Python? Thanks, Adam

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• How to load JPG file into NSBitmapImageRep?

  - by Adam

  Objective-C / Cocoa: I need to load the image from a JPG file into a two dimensional array so that I can access each pixel. I am trying (unsuccessfully) to load the image into a NSBitmapImageRep. I have tried several variations on the following two lines of code: NSString *filePath = [NSString stringWithFormat: @"%@%@",@"/Users/adam/Documents/phoneimages/", [outLabel stringValue]]; //this coming from a window control NSImageRep *controlBitmap = [[NSImageRep alloc] imageRepWithContentsOfFile:filePath]; With the code shown, I get a runtime error: -[NSImageRep imageRepWithContentsOfFile:]: unrecognized selector sent to instance 0x100147070. I have tried replacing the second line of code with: NSImage *controlImage = [[NSImage alloc] initWithContentsOfFile:filePath]; NSBitmapImageRep *controlBitmap = [[NSBitmapImageRep alloc] initWithData:controlImage]; But this yields a compiler error 'incompatible type' saying that initWithData wants a NSData variable not an NSImage. I have also tried various other ways to get this done, but all are unsuccessful either due to compiler or runtime error. Can someone help me with this? I will eventually need to load some PNG files in the same way (so it would be nice to have a consistent technique for both). And if you know of an easier / simpler way to accomplish what I am trying to do (i.e., get the images into a two-dimensional array), rather than using NSBitmapImageRep, then please let me know! And by the way, I know the path is valid (confirmed with fileExistsAtPath) -- and the filename in outLabel is a file with .jpg extension. Thanks for any help!

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