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• Should I use .pl or .cgi for Perl web script files?

  - by Nano HE

  HI. I created two files 'hello.pl' and 'hello.cgi' with the code below. #!/usr/bin/perl print "Content-type:text/html\n\n"; print "hello world"; I can view the page via both http://www.mydomain.com/cgi-bin/hello.pl and http://www.mydomain.com/cgi-bin/hello.cgi. Which one is more sense in Perl web dev? BTW, the directory of 'cgi-bin' created by my VPS server, Do I need contact with my VPS support to remove it or just remain it like this URL style? Maybe http://www.mydomain.com/perDev/hello.cgi is better?

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• How can I create a qr// in Perl 5.12 from C?

  - by kristina

  This has been working for me in 5.8 and 5.10, but in 5.12 my code creates this weird non-qr object: # running "print Dumper($regex)" $VAR1 = bless( do{\(my $o = '')}, 'Regexp' ); Whereas printing a qr// not created by my code looks like this: # running "print Dumper(qr/foo/i)" $VAR1 = qr/(?i-xsm:foo)/; My code is basically: REGEXP *rx = re_compile(pattern, flags); SV *regex = sv_2mortal(newSVpv("",0)); sv_magic(regex, (SV*)rx, PERL_MAGIC_qr, 0, 0); stash = gv_stashpv("Regexp", 0); sv_bless(newRV((SV*)regex), stash); Anyone know how to correctly create a regex from a string in 5.12?

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• Metadata file ... could not be found error when building projects

  - by Robert Höglund

  Every time I start Visual Studio 2008, the first time I try to run the project I get the error CS0006 The metadata file ... could not be found. If I do a rebuild of the complete solution it works. Some information about the solution: I'm building in debug mode and Visual Studio complains about not finding dll:s in the release folder. The projects Visual Studio complains about are used by many other projects in the solution. I have changed the default output path of all projects to a ......\build\debug\ProjectName and ......\build\release\ProjectName respectively. (Just to get all build files in one directory) I have the same problem with a another solution. The solution was created from scratch. There are 9 projects in the solution. One WPF and 8 class libraries using dotnet 3.5. Any ideas on what is causing this problem?

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• python list directory , subdirectory and files

  - by thomytheyon

  Hi Alls, I'm trying to make a script to list all directory, subdirectory, and files in a given directory. I tried this : import sys,os root="/home/patate/directory/" path=os.path.join(root,"targetdirectory") for r,d,f in os.walk(path): for file in f: print os.path.join(root,file) Unfortunatly it doesn't work properly, i get all the files, but not them complete path. like : if the dir struct would be : /home/patate/directory/targetdirectory/123/456/789/file.txt It would print: /home/patate/directory/targetdirectory/file.txt What i need is the first result, any help would be greatly appreciated ! Thanks

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• visual studio 2008 linker error

  - by ravi

  In visual studio 2008, I have created a static dll called test_static.dll. I am trying to call this from one application. I have included this dll in source files folder and the header file related to it in headers folder. When i am running the application I am getting following liking error. Please give me a solution. error LNK2019: unresolved external symbol "struct morph_output * __cdecl morpho_data(struct morph_input *)" (?morpho_data@@YAPAUmorph_output@@PAUmorph_input@@@Z) referenced in function _wmain 1D:\test_app\Debug\test_app.exe : fatal error LNK1120: 1 unresolved externals 1Build log was saved at "file://d:\test_app\test_app\Debug\BuildLog.htm" Here test_app is application that is using static dll. and morpho_data is the dll function which is taking input as structure and returning another structure.

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• Adding to arrays and printing arrays in Java

  - by nfoggia

  I need help figuring out how to get the user to input a number of integers no more than 10, and then add them to an array and print them out from the array. The code I have below, when run, asks the user for the integers and then runs forever and doesn't work. What am I doing wrong? public static void main(String[] args) { Scanner input = new Scanner(System.in); // create a new scanner System.out.print("Enter integers between 1 and 100\n "); int[] nextNumber = new int[10]; int i = 0; int number = input.nextInt(); while (i < nextNumber.length){ i++; nextNumber[i] = number; number = input.nextInt(); } int a = 0; while (a < nextNumber.length){ a++; System.out.println(nextNumber[a]); }

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• How to automaticly add a page number to all internal links on the HTML page?

  - by Tomasz

  In print mode, I would like to render such a links: <a href="#targetPage">link</a> like this: <a href="#targetPage">link (page 11)</a> (suppose the target page is on 11. page in print preview). It is possible to add page number using counters to the page footer with plain CSS, but could I use this in more "the way I want it" way? The solution doesn't need to be cross-browser (FF/Chrome is enough), any CSS/Javascript tricks are allowed...

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• How can I decode UTF-16 data in Perl?

  - by Geo

  If I open a file ( and specify an encoding directly ) : open(my $file,"<:encoding(UTF-16)","some.file") || die "error $!\n"; while(<$file>) { print "$_\n"; } close($file); I can read the file contents nicely. However, if I do: use Encode; open(my $file,"some.file") || die "error $!\n"; while(<$file>) { print decode("UTF-16",$_); } close($file); I get the following error: UTF-16:Unrecognised BOM d at F:/Perl/lib/Encode.pm line 174 How can I make it work with decode?

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• Mean of Sampleset and powered Sampleset

  - by Milla Well

  I am working on an ICA implementation wich is based on the assumption, that all source signals are independent. So I checked on the basic concepts of Dependence vs. Correlation and tried to show this example on sample data from numpy import * from numpy.random import * k = 1000 s = 10000 mn = 0 mnPow = 0 for i in arange(1,k): a = randn(s) a = a-mean(a) mn = mn + mean(a) mnPow = mnPow + mean(a**3) print "Mean X: ", mn/k print "Mean X^3: ", mnPow/k But I couldn't produce the last step of this example E(X^3) = 0: >> Mean X: -1.11174580826e-18 >> Mean X^3: -0.00125229267144 First value I would consider to be zero, but second value is too large, isn't it? Since I subtract the mean of a, I expected the mean of a^3 to be zero as well. Does the problem lie in the random number generator, the precision of the numerical values in my misunderstanding of the concepts of mean and expected value?

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• How can I read messages in a Gmail account from Perl?

  - by kiruthika

  I have used the module Mail::Webmail::Gmail to read the new messages in my Gmail account. I have written the following code for this purpose: use strict; use warnings; use Data::Dumper; use Mail::Webmail::Gmail; my $gmail = Mail::Webmail::Gmail->new( username => 'username', password => 'password', ); my $messages = $gmail->get_messages( label => $Mail::Webmail::Gmail::FOLDERS{ 'INBOX' } ); foreach ( @{ $messages } ) { if ( $_->{ 'new' } ) { print "Subject: " . $_->{ 'subject' } . " / Blurb: " . $_->{ 'blurb' } . "\n"; } } But it didn't print anything. Can anyone help me in this or suggest any other module for this? Thanks in advance.

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• Code to find nth largest number in an array

  - by user136104

  I have written following code in perl #!/usr/bin/perl @array = (3,6,8,1,2); my $second_largest = 0; my $largest = 0; for (@array) { if($_ > $largest) { $second_largest = $largest; $largest = $_; } if($_ > $second_largest && $_ < $largest) { $second_largest = $_; } } print "Second largest::".$second_largest; print "largest::".$largest; But I need a general code to find out "Nth" largest and smallest number of an array Please help me

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• Why is it that I cannot insert this into Django correctly?

  - by alex

  new_thing = MyTable(last_updated=datetime.datetime.now()) new_thing.save() >>>>select * from MyTable\G; last_updated: 2010-04-01 05:26:21 However, in my Python console...this is what it says... >>> print datetime.datetime.now() 2010-04-01 10:26:21.643041 So obviously it's off by 5 hours. By the way, the database uses "SYSTEM" as its time, so they should match perfectly. mysql> SELECT current_time; +--------------+ | current_time | +--------------+ | 10:30:16 | +--------------+ >>> print datetime.datetime.now() 2010-04-01 10:30:17.793040

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• Killing a script launched in a Process via os.system()

  - by L.J.

  I have a python script which launches several processes. Each process basically just calls a shell script: from multiprocessing import Process import os import logging def thread_method(n = 4): global logger command = "~/Scripts/run.sh " + str(n) + " >> /var/log/mylog.log" if (debug): logger.debug(command) os.system(command) I launch several of these threads, which are meant to run in the background. I want to have a timeout on these threads, such that if it exceeds the timeout, they are killed: t = [] for x in range(10): try: t.append(Process(target=thread_method, args=(x,) ) ) t[-1].start() except Exception as e: logger.error("Error: unable to start thread") logger.error("Error message: " + str(e)) logger.info("Waiting up to 60 seconds to allow threads to finish") t[0].join(60) for n in range(len(t)): if t[n].is_alive(): logger.info(str(n) + " is still alive after 60 seconds, forcibly terminating") t[n].terminate() The problem is that calling terminate() on the process threads isn't killing the launched run.sh script - it continues running in the background until I either force kill it from the command line, or it finishes internally. Is there a way to have terminate also kill the subshell created by os.system()?

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• PHP: deleting files – permission denied – chmod?

  - by mathiregister

  hi guys, i want to delete files from a directory via php. Somehow my php_errorlog always tells me: [06-Jun-2010 19:38:46] PHP Warning: chmod() [function.chmod]: Operation not permitted in /Users/myname/htdocs/ if ($_POST) { echo "yeah!!!"; print count($_POST['deletefiles']); chmod($path, 0777); //server rights foreach ($_POST['deletefiles'] as $value) { print $value; unlink($path .'/' . $value); } //chmod($path, 0666); //server rights } what am I doing wrong? Thank you

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• PHP - JSON Steam API query

  - by Hunter

  First time using "JSON" and I've just been working away at my dissertation and I'm integrating a few features from the steam API.. now I'm a little bit confused as to how to create arrays. function test_steamAPI() { $api = ('http://api.steampowered.com/ISteamUser/GetPlayerSummaries/v0002/?key='.get_Steam_api().'&steamids=76561197960435530'); $test = decode_url($api); var_dump($test['response']['players'][0]['personaname']['steamid']); } //Function to decode and return the data. function decode_url($url) { $decodeURL = $url; $data = file_get_contents($url); $data_output = json_decode($data, true); return $data_output; } So ea I've wrote a simple method to decode Json as I'll be doing a fair bit.. But just wondering the best way to print out arrays.. I can't for the life of me get it to print more than 1 element without it retunring an error e.g. Warning: Illegal string offset 'steamid' in /opt/lampp/htdocs/lan/lan-includes/scripts/class.steam.php on line 48 string(1) "R" So I can print one element, and if I add another it returns errors. EDIT -- Thanks for help, So this was my solution: function test_steamAPI() { $api = ('http://api.steampowered.com/ISteamUser/GetPlayerSummaries/v0002/?key='.get_Steam_api().'&steamids=76561197960435530,76561197960435530'); $data = decode_url($api); foreach($data ['response']['players'] as $player) { echo "Steam id:" . $player['steamid'] . "\n"; echo "Community visibility :" . $player['communityvisibilitystate'] . "\n"; echo "Player profile" . $player['profileurl'] ."\n"; } } //Function to decode and return the data. function decode_url($url) { $decodeURL = $url; $json = file_get_contents($decodeURL); $data_output = json_decode($json, true); return $data_output; } Worked this out by taking a look at the data.. and a couple json examples, this returns an array based on the Steam API URL (It works for multiple queries.... just FYI) and you can insert loops inside for items etc.. (if anyone searches for this).

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• How can I decode UTF-16 data in Perl when I don't know the byte order?

  - by Geo

  If I open a file ( and specify an encoding directly ) : open(my $file,"<:encoding(UTF-16)","some.file") || die "error $!\n"; while(<$file>) { print "$_\n"; } close($file); I can read the file contents nicely. However, if I do: use Encode; open(my $file,"some.file") || die "error $!\n"; while(<$file>) { print decode("UTF-16",$_); } close($file); I get the following error: UTF-16:Unrecognised BOM d at F:/Perl/lib/Encode.pm line 174 How can I make it work with decode?

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• Visual Studio creating bin/ folder in wrong location.

  - by Joviee

  In Visual Studio 2008, I have a solution with a number of projects. Each project has the same build output path of "..\bin\Debug\" for debug, and "..\bin\Release\" for release. So the directory structure looks like this: solution\ bin\ project1\ project2\ project3\ This all works fine, all the assemblies go to the correct location when I build the project, etc. Howevever, when I first open the solution in Visual Studio, an empty bin folder is created one level up from where it should. So I am getting: bin\ solution\ bin\ project1\ project2\ project3\ This folder is only created when I first open the solution. Never when I build. I have looked through the .sln and every .csproj file, and I cannot work out why this folder is being created. So, my questions are: a) Why is this bin folder being created? b) How do I stop Visual Studio from creating this bin folder?

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• Why doesn't this list comprehension do what I expect it to do?

  - by Az

  The original list project_keys = sorted(projects.keys()) is [101, 102, 103, 104, 105, 106, 107, 108, 109, 110] where the following projects were deemed invalid this year: 108, 109, 110. Thus: for project in projects.itervalues(): # The projects dictionary is mapped to the Project class if project.invalid: # Where invalid is a Bool parameter in the Project class project_keys.remove(project.proj_id) print project_keys This will return a list of integers (which are project id's) as such: [101, 102, 103, 104, 105, 106, 107] Sweet. Now, I wanted it try the same thing using a list comprehension. project_keys = [project_keys.remove(project.proj_id) for project in projects.itervalues() if project.invalid print project_keys This returns: [None, None, None] So I'm populating a list with the same number as the removed elements but they're Nones? Can someone point out what I'm doing wrong? Additionally, why would I use a list comprehension over the for-if block at the top? Conciseness? Looks nicer?

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• django + xmppy: send a message to two recipients

  - by Agrajag

  I'm trying to use xmpppy for sending jabber-messages from a django-website. This works entirely fine. However, the message only gets sent to the -first- of the recipients in the list. This happens when I run the following function from django, and also if I run it from an interactive python-shell. The weird part though, is that if I extract the -body- of the function and run that interactively, then all the recipients (there's just 2 at the moment) get the message. Also, I do know that the inner for-loop gets run the correct count times (2), because the print-statement does run twice, and return two different message-ids. The function looks like this: def hello_jabber(request, text): jid=xmpp.protocol.JID(settings.JABBER_ID) cl=xmpp.Client(jid.getDomain(),debug=[]) con=cl.connect() auth=cl.auth(jid.getNode(),settings.JABBER_PW,resource=jid.getResource()) for friend in settings.JABBER_FRIENDS: id=cl.send(xmpp.protocol.Message(friend,friend + ' is awesome:' + text)) print 'sent message with id ' + str(id) cl.disconnect() return render_to_response('jabber/sent.htm', locals())

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• tkinter python entry not being displayed

  - by user1050619

  I have created a Form with labels and entries..but for some reason the entries are not being created, peoplegui.py from tkinter import * from tkinter.messagebox import showerror import shelve shelvename = 'class-shelve' fieldnames = ('name','age','job','pay') def makewidgets(): global entries window = Tk() window.title('People Shelve') form = Frame(window) form.pack() entries = {} for (ix, label) in enumerate(('key',) + fieldnames): lab = Label(form, text=label) ent = Entry(form) lab.grid(row=ix, column=0) lab.grid(row=ix, column=1) entries[label] = ent Button(window, text="Fetch", command=fetchRecord).pack(side=LEFT) Button(window, text="Update", command=updateRecord).pack(side=LEFT) Button(window, text="Quit", command=window.quit).pack(side=RIGHT) return window def fetchRecord(): print('In fetch') def updateRecord(): print('In update') if __name__ == '__main__': window = makewidgets() window.mainloop() When I run it the labels are created but not the entries.

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• In what circumstances are instance variables declared as '_var' in 'use fields' private?

  - by Pedro Silva

  I'm trying to understand the behavior of the fields pragma, which I find poorly documented, regarding fields prefixed with underscores. This is what the documentation has to say about it: Field names that start with an underscore character are made private to the class and are not visible to subclasses. Inherited fields can be overridden but will generate a warning if used together with the -w switch. This is not consistent with its actual behavior, according to my test, below. Not only are _-prefixed fields visible within a subclass, they are visible within foreign classes as well (unless I don't get what 'visible' means). Also, directly accessing the restricted hash works fine. Where can I find more about the behavior of the fields pragma, short of going at the source code? { package Foo; use strict; use warnings; use fields qw/a _b __c/; sub new { my ( $class ) = @_; my Foo $self = fields::new($class); $self->a = 1; $self->b = 2; $self->c = 3; return $self; } sub a : lvalue { shift->{a} } sub b : lvalue { shift->{_b} } sub c : lvalue { shift->{__c} } } { package Bar; use base 'Foo'; use strict; use warnings; use Data::Dumper; my $o = Bar->new; print Dumper $o; ##$VAR1 = bless({'_b' => 2, '__c' => 3, 'a' => 1}, 'Foo'); $o->a = 4; $o->b = 5; $o->c = 6; print Dumper $o; ##$VAR1 = bless({'_b' => 5, '__c' => 6, 'a' => 4}, 'Foo'); $o->{a} = 7; $o->{_b} = 8; $o->{__c} = 9; print Dumper $o; ##$VAR1 = bless({'_b' => 8, '__c' => 9, 'a' => 7}, 'Foo'); }

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• How can I clear the appcache on the Google Chrome iPad app?

  - by Jannis

  I've written a little HTML5 based web app that I am trying to debug on the iPad using the Chrome for iPad app. I have added a cache.manifest file to my app which has some heavy caching in it of most static resources however since I am now wanting to debug the app I need a way to clear this cache. I know that on Chrome for Mac you can use: chrome://appcache-internals/ however this page does not exist in the iPad app of Chrome. The regular "Clear Browsing Data" does not empty the appcache —at least not in my case. Does anyone know how I can clear the appcache for the Chrome iPad app?

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• Can this loop be sped up in pure Python?

  - by Noctis Skytower

  I was trying out an experiment with Python, trying to find out how many times it could add one to an integer in one minute's time. Assuming two computers are the same except for the speed of the CPUs, this should give an estimate of how fast some CPU operations may take for the computer in question. The code below is an example of a test designed to fulfill the requirements given above. This version is about 20% faster than the first attempt and 150% faster than the third attempt. Can anyone make any suggestions as to how to get the most additions in a minute's time span? Higher numbers are desireable. EDIT: This experiment is being written in Python 3.1 and is 15% faster than the fourth speed-up attempt. def start(seconds): import time, _thread def stop(seconds, signal): time.sleep(seconds) signal.pop() total, signal = 0, [None] _thread.start_new_thread(stop, (seconds, signal)) while signal: total += 1 return total if __name__ == '__main__': print('Testing the CPU speed ...') print('Relative speed:', start(60))

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• Translate imperative control flow with break-s/continue-s to haskell

  - by dorserg

  Consider the following imperative code which finds the largest palindrome among products of 3-digit numbers (yes, it's the one of the first tasks from "Project of [outstanding mathematician of 18th century]" site): curmax = 0 for i in range(999,100): for j in range(999,100): if ((i*j) < curmax): break if (pal(i*j)): curmax = i*j break print curmax As I'm learning Haskell currently, my question is, how do you translate this (and basically any imperative construct that contains something more complex than just plain iteration, e.g. breaks, continues, temporary variables and all this) to Haskell? My version is maxpal i curmax | i < 100 = curmax | otherwise = maxpal (i-1) (innerloop 999) where innerloop j | (j < 100) || (p < curmax) = curmax | pal p = p | otherwise = innerloop (j-1) where p = i*j main = print $ maxpal 999 0 but this looks like we're still in imperative uglytown. So what could you advise, what are the approaches of dealing with such cases FP-style?

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• Bash: how to supress newlines?

  - by gilgongo

  I'm trying to extract fields from a pipe-delimited file and provide them as arguments to an external program in a loop. The file contains lines like this: value1|value2 value3|value4 So I came up with: while read line; do echo -n "${line}" | awk -F '|' '{print $1}'; echo -n " something "; echo -n "${line}" | awk -F '|' '{print $2}'; echo " somethingelse"; done < <(cat $FILE) I want to see the following output: value1 something value2 somethingelse value3 something value4 somethingelse But instead I'm getting: value1 something value2 somethingelse value3 something value4 somethingelse Perhaps I shouldn't be using echo?

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