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• Python virtualenv conflicting

  - by Fernando

  I'm trying to learn Django, so I started by reading about virtualenv. After installing it with pip (, I end up with: ... sudo pip install virtualenv) ... virtualenv paths virtualenv at /usr/local/bin/virtualenv and virtualenv-2.7 at /usr/local/bin/virtualenv-2.7 If I use virtualenv-2.7 it seems to work fine, but if I use virtualenv, new modules get added to /usr/local/bin, instead of being inside the environment. Example cd ~ virtualenv v1 source v1/bin/activate easy_install yolk which yolk # /usr/local/bin If I use virtualenv-2-7, yolk gets installed correctly inside v1. Did I mess up the installation? How can I fix this? (maybe uninstall virtualenv and start over). Thanks for any help! Edit: I figured i have two easy_install bins /usr/bin/easy_install-2.7 and /usr/bin/easy_install easy_install --version distribute 0.6.24dev-r0 easy_install-2.7 --version distribute 0.6.24dev-r0 so this may be the cause of problems. More info: python version: 2.7.3 virtualenv version: 1.10.1

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• Service and Web Reference crashes Visual Studio

  - by CatZ

  When I move the mouse over any of these two or right click any of them Visual Studio crashes with the following message in the event log: Felet uppstod i programmet med namn: devenv.exe, version 9.0.30729.1, tidsstämpel 0x488f2b50 , felet uppstod i modulen med namn: ntdll.dll, version 6.1.7600.16385, tidsstämpel 0x4a5bdb3b Undantagskod: 0xc0000374 Felförskjutning: 0x000cdcbb Process-ID: 0xef4 Programmets starttid: 0x01cb07b7f1bd036d Sökväg till program: C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\devenv.exe Sökväg till modul: C:\Windows\SysWOW64\ntdll.dll Rapport-ID: 46c92fc7-73ab-11df-b110-002481038dc3 Unfortunately it's the same thing in Visual Studio 2010 as it is in Visual Studio 2008. I have tried to repair the installation, reset all settings to default and Uninstall all plugins I have without any noticable results. Does anyone have any clue to what is going on? Salient part in English: Faulting application devenv.exe, version 9.0.30729.1, time stamp 0x488f2b50, faulting module ntdll.dll, version 6.1.7600.16385, time stamp 0x4a5bdb3b, exception code 0xc0000374, fault offset 0x000cdcbb, process id 0xef4, application start time 0x01cb07b7f1bd036d.

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• Attempting to find a formula for tessellating rectangles onto a board, where middle square can't be

  - by timemirror

  I'm working on a spatial stacking problem... at the moment I'm trying to solve in 2D but will eventually have to make this work in 3D. I divide up space into n x n squares around a central block, therefore n is always odd... and I'm trying to find the number of locations that a rectangle of any dimension less than n x n (eg 1x1, 1x2, 2x2 etc) can be placed, where the middle square is not available. So far I've got this.. total number of rectangles = ((n^2 + n)^2 ) / 4 ..also the total number of squares = (n (n+1) (2n+1)) / 6 However I'm stuck in working out a formula to find how many of those locations are impossible as the middle square would be occupied. So for example: [] [] [] [] [x] [] [] [] [] 3 x 3 board... with 8 possible locations for storing stuff as mid square is in use. I can use 1x1 shapes, 1x2 shapes, 2x1, 3x1, etc... Formula gives me the number of rectangles as: (9+3)^2 / 4 = 144/4 = 36 stacking locations However as the middle square is unoccupiable these can not all be realized. By hand I can see that these are impossible options: 1x1 shapes = 1 impossible (mid square) 2x1 shapes = 4 impossible (anything which uses mid square) 3x1 = 2 impossible 2x2 = 4 impossible etc Total impossible combinations = 16 Therefore the solution I'm after is 36-16 = 20 possible rectangular stacking locations on a 3x3 board. I've coded this in C# to solve it through trial and error, but I'm really after a formula as I want to solve for massive values of n, and also to eventually make this 3D. Can anyone point me to any formulas for these kind of spatial / tessellation problem? Also any idea on how to take the total rectangle formula into 3D very welcome! Thanks!

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• Force ruby to use dbi Gem instead of dbi in site_ruby

  - by sutch

  I'm using: Windows 7 Ruby 1.8.6 One-Click Installer DBI version 0.4.3 installed using RubyGems What I see when executing these commands: C:ruby -v ruby 1.8.6 (2008-08-11 patchlevel 287) [i386-mswin32] C:gem -v 1.3.1 C:ruby -r rubygems -r dbi -e "puts DBI::VERSION" 0.2.2 C:gem list dbi *** LOCAL GEMS *** dbi (0.4.3) Why do ruby scripts use the DBI installed in site_ruby rather than the DBI installed with RubyGems? Updated to respond to Luis Lavena's answer... Here's what happened when I attempted what you suggest: C:ruby -r rubygems -e "require 'rubygems'; puts DBI::VERSION" -e:1: uninitialized constant DBI (NameError) And when I updated to require DBI: C:ruby -r rubygems -e "require 'rubygems' ; require 'dbi' ; puts DBI::VERSION" 0.2.2 Why wouldn't RubyGems override the built-in library?

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• No long-running conversations - IllegalArgumentException: Stack must not be null

  - by Markos Fragkakis

  Hi all, I have a very simple application with just 2 pages on WebLogic 10.3.2 (11g), Seam 2.2.0.GA. I have a command button in each, which makes a redirect-after-post to the other. This works well, as I see the URL of the current page I am seeing in the address bar. BUT, even though I have no long-running conversations defined, after a random number of clicks, and - I think - after a random number of seconds (~10s - 60s) I get the lovely exception at the end of this post. Now, if I have understood how temporary conversations work when redirecting this happens: When I first see my application, the url is http://localhost:7001/myapp When I click the button in pageA.xhtml, I end up in "pageB.xhtml?cid=26". This is normal because Seam extends the temporary conversation of the first request to last until the renderResponse phase of the redirect. So, it uses the cid (Conversation Id) of the extended temporary conversation to find any propagated parameters. When I click the button in pageB.xhtml, I end up in pageA.xhtml?cid=26 The same cid was given to the new extended temporary conversation. This is normal because the conversation ended at the end of the previous redirect-after-post, and not the number 26 is free to use as a cid. Is this all correct? If yes, why does this happen: If I re-type the applications home address (showing pageA) and re-click, I end up in pageB.xhtml?cid=29, which is a different number than 26. But 26 has ended after the previous RenderResponse phase, befire I re-types the url. Why is it not used instead of 29? So, to sup up, 2 questions: Why do I get the exception, even though I have not started any long-running conversations? What happens exactly with the cid? On what basis does it change? Cheers,

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• fast similarity detection

  - by reinierpost

  I have a large collection of objects and I need to figure out the similarities between them. To be exact: given two objects I can compute their dissimilarity as a number, a metric - higher values mean less similarity and 0 means the objects have identical contents. The cost of computing this number is proportional to the size of the smaller object (each object has a given size). I need the ability to quickly find, given an object, the set of objects similar to it. To be exact: I need to produce a data structure that maps any object o to the set of objects no more dissimilar to o than d, for some dissimilarity value d, such that listing the objects in the set takes no more time than if they were in an array or linked list (and perhaps they actually are). Typically, the set will be very much smaller than the total number of objects, so it is really worthwhile to perform this computation. It's good enough if the data structure assumes a fixed d, but if it works for an arbitrary d, even better. Have you seen this problem before, or something similar to it? What is a good solution? To be exact: a straightforward solution involves computing the dissimilarities between all pairs of objects, but this is slow - O(n2) where n is the number of objects. Is there a general solution with lower complexity?

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• Programatically send SMS to email using Verizon Motorola Droid on Android

  - by Dave

  Hi, I was wondering if anyone knew the proper way to send an SMS message to an e-mail address using Verizon's CDMA Motorola Droid phone. The internal messaging application appears to automagically do this. While 3rd party applications like SMSPopup don't seem to be able to properly reply to e-mail addresses unless you compose the message inside the messaging application. When the internal messaging application sends a SMS message there's a corresponding 'RIL_REQUEST_CDMA_SEND_SMS' entry in the logcat (adb logcat -b radio). When you send a SMS to an e-mail address it prints the same thing, so behind the scenes it looks as though it is sending an sms. The interesting thing is that if you look at the content provider sent box the messages are addressed to various 1270XX-XXX-XXXX numbers. On other services you can send e-mail addresses by sending a SMS to a predefined short sms number. And then formatting your SMS as emailaddress subject message i.e. http://en.wikipedia.org/wiki/SMS_gateway#Carrier-Provided_SMS_to_E-Mail_Gateways For example, using T-mobile's number (500) you can send a SMS to an e-mail using the following: SmsManager smsMgr = SmsManager.getDefault(); smsMgr.sendTextMessage("500", null, "[email protected] message sent to an e-mail address from a SMS", null, null); Does anyone know if It is possible to programatically send SMS to email messages from a CDMA Android phone? Does Verizon actually send your replies as SMS messages or are they actually sent as MMS or normal http email messages? Any ideas about how to intercept what the raw message being sent to see what's going on? It might be possible that Verizon somehow generates a fake number temporarily tied to an e-mail address (since repeated messages are not sent to the same number). But, that seems pretty heavy handed. Thanks!

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• Speed up bitstring/bit operations in Python?

  - by Xavier Ho

  I wrote a prime number generator using Sieve of Eratosthenes and Python 3.1. The code runs correctly and gracefully at 0.32 seconds on ideone.com to generate prime numbers up to 1,000,000. # from bitstring import BitString def prime_numbers(limit=1000000): '''Prime number generator. Yields the series 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 ... using Sieve of Eratosthenes. ''' yield 2 sub_limit = int(limit**0.5) flags = [False, False] + [True] * (limit - 2) # flags = BitString(limit) # Step through all the odd numbers for i in range(3, limit, 2): if flags[i] is False: # if flags[i] is True: continue yield i # Exclude further multiples of the current prime number if i <= sub_limit: for j in range(i*3, limit, i<<1): flags[j] = False # flags[j] = True The problem is, I run out of memory when I try to generate numbers up to 1,000,000,000. flags = [False, False] + [True] * (limit - 2) MemoryError As you can imagine, allocating 1 billion boolean values (1 byte 4 or 8 bytes (see comment) each in Python) is really not feasible, so I looked into bitstring. I figured, using 1 bit for each flag would be much more memory-efficient. However, the program's performance dropped drastically - 24 seconds runtime, for prime number up to 1,000,000. This is probably due to the internal implementation of bitstring. You can comment/uncomment the three lines to see what I changed to use BitString, as the code snippet above. My question is, is there a way to speed up my program, with or without bitstring?

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• Aptana Plugin for Eclipse and jQuery code assist

  - by cupakob

  I want to use autocomplete for jQuery in Eclipse. The Aptana Plugin is installed: Aptana Web Development Tools Version: 1.5.1.25495-787Y07jbcbrChz-Tq2k383275 Support for jQuery also: Aptana Support for jQuery Version: 1.3.2.00005 JavaScript/WTP is installed: JavaScript Developer Tools Version: 1.1.1.v200906091427-77-FGBCcNBC-BeMcEeOm Build id: 20090616035105 But the the autocomplete doesn't work. Have someone an idea, where is the problem?

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• Where is the latest Eric meyer reset?

  - by metal-gear-solid

  How many version are eric meyer created of his CSS reset and where is latest and whatis difference in each version?

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• log4net with .NET 4.0

  - by Jonathan

  I've thrown together some code to tinker with the new .Net 4.0/VS 2010 pieces, but I can't seem to find a build of my logging framework of choice (log4net) for 4.0, and I'm getting reference errors with the 2.0 version. Is there a 4.0 version available somewhere? I'm not asking for new features, just a version that's already been rebuilt against the new assemblies. Anyone know where I can find a build of 1.2.10 built for the 4.0 framework?

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• Displaying an inverted pyramid of asterisks

  - by onyebuoke

  I help in my for my program. I am required 2 create a inverted pyramid of stars which rows depends on the number of stars the user keys, but I've done it so it does not give an inverted pyramid, it gives a regular pyramid. #include <stdio.h> #include <conio.h> void printchars(int no_star, char space); int getNo_of_rows(void); int main(void) { int numrows, rownum; rownum=0; numrows=getNo_of_rows(); for(rownum=0;rownum<=numrows;rownum++) { printchars(numrows-rownum, ' '); printchars((2*rownum-1), '*'); printf("\n"); } _getche(); return 0; } void printchars(int no_star, char space) { int cnt; for(cnt=0;cnt<no_star;cnt++) { printf("%c",space); } } int getNo_of_rows(void) { int no_star; printf("\n Please enter the number of stars you want to print\n"); scanf("%d",&no_star); while(no_star<1) { printf("\n number incorrect, please enter correct number"); scanf("%d",&no_star); } return no_star; }

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• Mobile App Data Syncronization

  - by Matt Rogish

  Let's say I have a mobile app that uses HTML5 SQLite DB (and/or the HTML5 key-value store). Assets (media files, PDFs, etc.) are stored locally on the mobile device. Luckily enough, the mobile device is a read-only copy of the "centralized" storage, so the mobile device won't have to propagate changes upstream. However, as the server changes assets (creates new ones, modifies existing, deletes old ones) I need to propagate those changes back to the mobile app. Assume that server changes are grouped into changesets (version number n) that contain some information (added element XYZ, deleted id = 45, etc.) and that the mobile device has limited CPU/bandwidth, so most of the processing has to take place on the server. I can think of a couple of methods to do this. All have trade-offs and at this point, I'm unsure which is the right course of action... Method 1: For change set n, store the "diff" of the current n and previous n-1. When a client with version y asks if there have been any changes, send the change sets from version y up to the current version. e.g. added item 334, contents: xxx. Deleted picture 44. Deleted PDF 11. Changed 33. added picture 99. Characteristics: Diffs take up space, although in theory would be kept small. However, all diffs must be kept around indefinitely (should a v1 app have not been updated for a year, must apply v2..v100). High latency devices (mobile apps) will incur a penalty to send lots of small files (assume cannot be zipped or tarr'd up into one file) Very few server CPU resources required, as all it does is send the client a list of files "Dumb" - if I change an item in change set 3, and change it to something else in 4, the client is going to perform both actions, even though #3 is rendered moot by #4. Or, if an asset is added in #4 and removed in #5 - the client will download a file just to delete it later. Method 2: Very similar to method 1 except on the server, do some sort of a diff between the change sets represented by the app version and server version. Package that up and send that single change set to the client. Characteristics: Client-efficient: The client only has to process one file, duplicate or irrelevant changes are stripped out. Server CPU/space intensive. The change sets must be diff'd and then written out to a file that is then sent to the client. Makes diff server scalability an issue. Possibly ways to cache the results and re-use them, but in the wild there's likely to be a lot of different versions so the diff re-use has a limit Diff algorithm is complicated. The change sets must be structured in such a way that an efficient and effective diff can be performed. Method 3: Instead of keeping diffs, write out the entire versioned asset collection to a mobile-database import file. When client requests an update, send the entire database to client and have them update their assets appropriately. Characteristics: Conceptually simple -- easy to develop and deploy Very inefficient as the client database is restored every update. If only one new thing was added, the whole database is refreshed. Server space and CPU efficient. Only the latest version DB needs kept around and the server just throws the file to the client. Others?? Thoughts? Thanks!!

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• Universal iPad App rejected because of launch crash that I can't reproduce

  - by Enrique R.

  Hello everyone, I'm very frustrated with this problem. After one week of waiting my universal iPad app has been rejected because "is crashing on launch on iPad running iPhone OS 3.2 and iPhone 3GS running iPhone OS 3.1.3 and Mac OS X 10.6.2." Unfortunately I can't replicate the problem, I've tested in debug and release modes and the app works just fine. I even created an ad-hoc configuration and test it in other devices and everything works fine. I should clarify that this is an update to a current iPhone application and I'm using the same distribution profile as the original iPhone app. Also, I checked everything before building the universal app following this entry: http://iphonedevelopment.blogspot.com/2010/04/converting-iphone-apps-to-universal.html Here are the crash logs that Apple sent me: Incident Identifier: 3E0D4A3B-2896-444D-BCBE-6C0CA1A66A90 CrashReporter Key: 18b5124ea5f657227c5f202a27ed707379b3e2e7 Process: Transfer [982] Path: /var/mobile/Applications/E9062465-7EA6-424C-9C61-D9DBCC7C915A/Transfer.app/Transfer Identifier: Transfer Version: ??? (???) Code Type: ARM (Native) Parent Process: launchd [1] Date/Time: 2010-05-04 15:35:57.399 -0700 OS Version: iPhone OS 3.1.3 (7E18) Report Version: 104 Exception Type: EXC_BAD_INSTRUCTION (SIGILL) Exception Codes: 0x00000001, 0x3eaa2188 Highlighted Thread: 0 Backtrace not available Unknown thread crashed with ARM Thread State: r0: 0x00002f90 r1: 0x00000000 r2: 0x385242d8 r3: 0x0000010d r4: 0x00000000 r5: 0x00000000 r6: 0x00000000 r7: 0x00000000 r8: 0x2ffffba0 r9: 0x2fffef90 r10: 0x00000000 r11: 0x00000000 ip: 0x0000000c sp: 0x2ffffba4 lr: 0x2fe08727 pc: 0x00002f94 cpsr: 0x40000010 Binary Images: 0x1000 - 0x25fff +Transfer armv7 /var/mobile/Applications/E9062465-7EA6-424C-9C61-D9DBCC7C915A/Transfer.app/Transfer 0x2fe00000 - 0x2fe24fff dyld armv7 /usr/lib/dyld .... And the one for the iPad: Incident Identifier: 3B170A28-C8E2-4018-8166-E69432A65070 CrashReporter Key: 4a0194e3f60559127faef2b014df605e4c47b981 Hardware Model: iPad1,1 Process: Transfer [533] Path: /var/mobile/Applications/400EE394-7BEE-45CA-942D-DBDC106360FF/Transfer.app/Transfer Identifier: Transfer Version: ??? (???) Code Type: ARM (Native) Parent Process: launchd [1] Date/Time: 2010-05-04 15:37:17.505 -0700 OS Version: iPhone OS 3.2 (7B367) Report Version: 104 Exception Type: 00000020 Exception Codes: 0x8badf00d Highlighted Thread: 0 Application Specific Information: com.erclab.iphone.photodownload failed to launch in time elapsed total CPU time (seconds): 1.150 (user 0.560, system 0.590), 6% CPU elapsed application CPU time (seconds): 0.150, 1% CPU Thread 0: 0 libobjc.A.dylib 0x33561996 0x33560000 + 6550 1 libobjc.A.dylib 0x33564986 0x33560000 + 18822 2 libobjc.A.dylib 0x33564cb2 0x33560000 + 19634 ... The app does not do anything other than loading a local HTML into a web view after the app it's launched so I don't understand why it says "failed to launch in time" Any help will be very much appreciated.

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• Convert sqlalchemy row object to python dict

  - by Anurag Uniyal

  or a simple way to iterate over columnName, value pairs? My version of sqlalchemy is 0.5.6 Here is the sample code where I tried using dict(row), but it throws exception , TypeError: 'User' object is not iterable import sqlalchemy from sqlalchemy import * from sqlalchemy.ext.declarative import declarative_base from sqlalchemy.orm import sessionmaker print "sqlalchemy version:",sqlalchemy.__version__ engine = create_engine('sqlite:///:memory:', echo=False) metadata = MetaData() users_table = Table('users', metadata, Column('id', Integer, primary_key=True), Column('name', String), ) metadata.create_all(engine) class User(declarative_base()): __tablename__ = 'users' id = Column(Integer, primary_key=True) name = Column(String) def __init__(self, name): self.name = name Session = sessionmaker(bind=engine) session = Session() user1 = User("anurag") session.add(user1) session.commit() # uncommenting next line throws exception 'TypeError: 'User' object is not iterable' #print dict(user1) # this one also throws 'TypeError: 'User' object is not iterable' for u in session.query(User).all(): print dict(u) Running this code on my system outputs: sqlalchemy version: 0.5.6 Traceback (most recent call last): File "untitled-1.py", line 37, in <module> print dict(u) TypeError: 'User' object is not iterable

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• How can I make an AdvancedDataGrid re-display its labels when the results of the labelFunction chang

  - by Chris R

  I have an AdvancedDataGrid with a custom label function whose value can change based on other form status (specifically, there's a drop down to choose the time display format for some columns). Right now, I have this labelFunction: internal function formatColumnTime(item: Object, column: AdvancedDataGridColumn): String { var seconds: Number = item[column.dataField]; return timeFormat.selectedItem.labelFunction(seconds); } internal function formatTimeAsInterval(time: Number): String { if (isNaN(time)) return ""; var integerTime: int = Math.round(time); var seconds: int = integerTime % 60; integerTime = integerTime / 60; var minutes: int = integerTime % 60; var hours: int = integerTime / 60; return printf("%02d:%02d:%02d", hours, minutes, seconds); } internal function formatTimeAsFractions(time: Number): String { if (isNaN(time)) return ""; var hours: Number = time / 3600.0; return new String(Math.round(hours * 100) / 100); } ... and the timeFormat object is a combo box with items whose labelFunction attributes are formatTimeAsFractions and formatTimeAsInterval. The columns that have time formats have formatColumnTime as their labelFunction value, because extracting the seconds in that function and passing it in to the formatters made for a more testable app (IMHO). So, when the timeFormat.selectedItem value changes, I want to force my grid to re-calculate the labels of these colums. What method must I call on it? invalidateProperties() didn't work, so that's out.

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• How do I best handle a needed patch for Perl/Tk?

  - by Streamline

  I am making a change to Perl/Tk for an application that has its own resident Perl and modules installation (so we can drop the app in and go). I've found a problem I am experiencing that I just stumbled on what seems to be the patch I need here: http://osdir.com/ml/lang.perl.tk/2004-10/msg00030.html Bug confirmed. Here's the patch against Tk804.027: --- Tk-804.027/pTk/mTk/generic/tkEntry.c Sat Mar 20 19:54:48 2004 +++ Tk-804.027-perl5.8.3d/pTk/mTk/generic/tkEntry.c Tue Oct 19 22:50:31 2004 @@ -3478,6 +3478,18 @@ Tcl_DStringFree(&script); #else + switch (type) { + case VALIDATE_INSERT: + type = 1; + break; + case VALIDATE_DELETE: + type = 0; + break; + default: + type = -1; + break; + } + code = LangDoCallback(entryPtr-interp, entryPtr-validateCmd, 1, 5, "%s %s %s %d %d", new, change, entryPtr-string, index, type); if (code != TCL_OK && code != TCL_RETURN) { Regards, Slaven I'd like to apply this patch or if there is a newer version of the Perl/Tk module I can upgrade to that includes this patch already that doesn't require I change the version of Perl, do that. Here is what I can find from the installation for this app: perl -v = 5.8.4 $Tk::version = '8.4' $Tk::patchlevel = '8.4' $Tk::VERSION = '804.027' So.. 1a) if there is a newer Tk VERSION that includes the patch in the link above, how do I upgrade just that module in the specific Perl installation location for this app? 1b) how do I know if that upgrade is compatible with 5.8.4 of Perl (I don't want to upgrade perl at this point) 2) if not, how do I apply that patch defined in that link?

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• How do you work out the IIS Virtual Path for an application?

  - by joshcomley

  When I try to change the ASP.NET version to v4 on IIS 6, I receive the following warning: Changing the Framework version requires a restart of the W3SVC service. Alternatively, you can change the Framework version without restarting the W3SVC service by running: aspnet_regiis.exe -norestart -s IIS-Viirtual-Path Do you want to continue (this will change the Framework version and restart the W3SVC service)? How do I work out IIS-Virtual-Path? I have tried the obvious paths i.e.: aspnet_regiis.exe -norestart -s "/WebSites/Extranet/AppName" Where WebSites is the name of the folder in IIS, Extranet the name of the root app and AppName the name of the Virtual Directory application I am trying to change. Thanks! Edit: How do I work out the virtual path for the Auth virtual directory in following IIS6 setup: I have tried: aspnet_regiis.exe -norestart -s "/Web Sites/Extranet/Auth" aspnet_regiis.exe -norestart -s "Auth" I get: Installation stopped because the specified path (WhateverIPutIn) is invalid.

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• Is any solution the correct solution?

  - by Eli

  I always think to myself after solving a programming challenge that I have been tied up with for some time, "It works, thats good enough". I don't think this is really the correct mindset, in my opinion and I think I should always be trying to code with the greatest performance. Anyway, with this said, I just tried a ProjectEuler question. Specifically question #2. How could I have improved this solution. I feel like its really verbose. Like I'm passing the previous number in recursion. <?php /* Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ... Find the sum of all the even-valued terms in the sequence which do not exceed four million. */ function fibonacci ( $number, $previous = 1 ) { global $answer; $fibonacci = $number + $previous; if($fibonacci > 4000000) return; if($fibonacci % 2 == 0) { $answer = is_numeric($answer) ? $answer + $fibonacci : $fibonacci; } return fibonacci($fibonacci, $number); } fibonacci(1); echo $answer; ?> Note this isn't homework. I left school hundreds of years ago. I am just feeling bored and going through the Project Euler questions

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• Crystal Reports .Net Guidance

  - by Ken Ray

  We have been using .Net and Visual Studio for the last six years, and early on developed a number of web based reporting applications using the .Net version of Crystal Reports that was bundled with Visual Studio. My overall opinion of that product has been, to say the least, rather unimpressed. It seemed to be incredibly difficult and convoluted to use, we had to make security changes, install various extra software, and so on. Now, we are moving to VS2008 and version 3.5 of the .Net framework, and the time has come to redevelop some of these old applications. The developers who used (and somehow mastered) Crystal .Net have long gone, and I am facing a decision - do we stick with Crystal Reports or move to something else. We also have the "full" version of Crystal Reports XI at our disposal. The way we use the product is to product pdf versions of data extracted from various databases. While some apps use the inbuilt Crystal Reports viewer as well, this seems to be redundant now with the flexibility of grid views - but there is still the need to produce a pdf version of the data in teh grid for printing, or in Excel format to download. What is the concensus? Is Crystal Reports .Net worth persisting with, or should we work out how to use version XI? Alternatively, is there a simple and low cost way to generate pdf reports without using Crystal? What good sources of "how to" information have others found and recommend? Are there suitable books, designed for VS2008 / .Net 3.5 development that you have used and found of benefit? Thanks in advance.

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• Are the old httpHandlers and httpModules elements needed in IIS7?

  - by James Newton-King

  I'd like to clean up the web.config and remove unneeded XML. A default ASP.NET 3.5 web application has the follow elements in the web.config: <httpHandlers> <remove verb="*" path="*.asmx"/> <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false"/> </httpHandlers> <httpModules> <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add name="UrlRoutingModule" type="System.Web.Routing.UrlRoutingModule, System.Web.Routing, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> </httpModules> When running under IIS7, which has modules and handlers being registered under the system.webServer element, is the configuration above still needed?

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• PHP PCRE differences on testing and hosting servers

  - by Gary Pearman

  Hi all, I've got the following regular expression that works fine on my testing server, but just returns an empty string on my hosted server. $text = preg_replace('~[^\\pL\d]+~u', $use, $text); Now I'm pretty sure this comes down to the hosting server version of PCRE not being compiled with Unicode property support enabled. The differences in the two versions are as follows: My server: PCRE version 7.8 2008-09-05 Compiled with UTF-8 support Unicode properties support Newline sequence is LF \R matches all Unicode newlines Internal link size = 2 POSIX malloc threshold = 10 Default match limit = 10000000 Default recursion depth limit = 10000000 Match recursion uses stack Hosting server: PCRE version 4.5 01-December-2003 Compiled with UTF-8 support Newline character is LF Internal link size = 2 POSIX malloc threshold = 10 Default match limit = 10000000 Match recursion uses stack Also note that the version on the hosting server (the same version PHP is compiled against) is pretty old. What confuses me though, is that pcretest fails on both servers from the command line with re> ~[^\\pL\d]+~u ** Unknown option 'u' although this regexp works fine when run from PHP on my server. So, I guess my questions are does the regular expression fail on the hosting server because of the lack of Unicode properties? Or is there something else that I'm missing? Thanks all, Gaz.

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• C# exception when calling stored procedure: ORA-01460 - unimplemented or unreasonable conversion req

  - by Taylor L

  I'm trying to call a stored procedure using ADO .NET and I'm getting the following error: ORA-01460 - unimplemented or unreasonable conversion requested The stored procedure I'm trying to call has the following parameters: param1 IN VARCHAR2, param2 IN NUMBER, param3 IN VARCHAR2, param4 OUT NUMBER, param5 OUT NUMBER, param6 OUT NUMBER, param7 OUT VARCHAR2 Below is the C# code I'm using to call the stored procedure: OracleCommand command = connection.CreateCommand(); command.CommandType = CommandType.StoredProcedure; command.CommandText = "MY_PROC"; OracleParameter param1 = new OracleParameter() { ParameterName = "param1", Direction = ParameterDirection.Input, Value = p1, OracleDbType = OracleDbType.Varchar2, Size = p1.Length }; OracleParameter param2 = new OracleParameter() { ParameterName = "param2", Direction = ParameterDirection.Input, Value = p2, OracleDbType = OracleDbType.Decimal }; OracleParameter param3 = new OracleParameter() { ParameterName = "param3", Direction = ParameterDirection.Input, Value = p3, OracleDbType = OracleDbType.Varchar2, Size = p3.Length }; OracleParameter param4 = new OracleParameter() { ParameterName = "param4", Direction = ParameterDirection.Output, OracleDbType = OracleDbType.Decimal }; OracleParameter param5 = new OracleParameter() { ParameterName = "param5", Direction = ParameterDirection.Output, OracleDbType = OracleDbType.Decimal}; OracleParameter param6 = new OracleParameter() { ParameterName = "param6", Direction = ParameterDirection.Output, OracleDbType = OracleDbType.Decimal }; OracleParameter param7 = new OracleParameter() { ParameterName = "param7", Direction = ParameterDirection.Output, OracleDbType = OracleDbType.Varchar2, Size = 32767 }; command.Parameters.Add(param1); command.Parameters.Add(param2); command.Parameters.Add(param3); command.Parameters.Add(param4); command.Parameters.Add(param5); command.Parameters.Add(param6); command.Parameters.Add(param7); command.ExecuteNonQuery(); Any ideas what I'm doing wrong?

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• Pseudo random numbers in php

  - by pg

  I have a function that outputs items in a different order depending on a random number. for example 1/2 of the time Popeye's and its will be #1 on the list and Taco Bell and its logo will be #2 and half the time the it will be the other way around. The problem is that when a user reloads or comes back to the page, the order is re-randomized. $Range here is the number of items in the db, so it's using a random number between 1 and the $range. $random = mt_rand(1,$range); for ($i = 0 ; $i < count($variants); $i++) { $random -= $variants[$i]['weight']; if ($random <= 0) { $chosenoffers[$tag] = $variants[$i]; break; } } I went to the beginning of the session and set this: if (!isset($_SESSION['rannum'])){ $_SESSION['rannum']=rand(1,100); } With the idea that I could replace the mt_rand in the function with some sort of pseudo random generator that used the same 1-100 random number as a seed throughout the session. That way i won't have to rewrite all the code that was already written. Am I barking up the wrong tree or is this a good idea?

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• advanced xml? multi level .. php parsing

  - by dave1019

  hi my knowledge of xml and php is somewhat basic but have been able to parse a simple xml document (one level) ~ <numbers> <number>1</number> <number>2</number> </numbers> i'm attempting to parse an xml document from a website providing the latest market prices for gold bullion. I think i'm going to need a paid professional but want to give it a shot the xml file looks like this: <envelope> <message type="MARKET_DEPTH_A" version="0.1"> <market> <pitches> <pitch securityClassNarrative="GOLD" securityId="AUXLN" considerationCurrency="GBP" > <buyPrices> <price actionIndicator="B" quantity="0.153" limit="23477" /> </buyPrices> <sellPrices> <price actionIndicator="S" quantity="0.058" limit="23589" /> </sellPrices> </pitch> </pitches> </market> </message> </envelope> and simply i have no idea how to access the values within the "headings". (whatever the term is) sounds like i'm asking for someone to do it for me, which I don't want, but I don't know what to search for ~ it doesn't look like a regular xml structure to me. thanks!

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