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  • C: lseek() related question.

    - by Andrei Ciobanu
    I want to write some bogus text in a file ("helloworld" text in a file called helloworld), but not starting from the beginning. I was thinking to lseek() function. If I use the following code: #include <unistd.h> #include <fcntl.h> #include <sys/stat.h> #include <sys/types.h> #include <stdlib.h> #include <stdio.h> #define fname "helloworld" #define buf_size 16 int main(){ char buffer[buf_size]; int fildes, nbytes; off_t ret; fildes = open(fname, O_CREAT | O_TRUNC | O_WRONLY, S_IRUSR | S_IWUSR); if(fildes < 0){ printf("\nCannot create file + trunc file.\n"); } //modify offset if((ret = lseek(fildes, (off_t) 10, SEEK_END)) < (off_t) 0){ fprintf(stdout, "\nCannot modify offset.\n"); } printf("ret = %d\n", (int)ret); if(write(fildes, fname, buf_size) < 0){ fprintf(stdout, "\nWrite failed.\n"); } close(fildes); return (0); } , it compiles well and it runs without any apparent errors. Still if i : cat helloworld The output is not what I expected, but: helloworld Can Where is "Can" comming from, and where are my empty spaces ? Should i expect for "zeros" instead of spaces ? If i try to open helloworld with gedit, an error occurs, complaining that the file character encoding is unknown.

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  • Java: dangerous self-returning-recursive function by IOException?

    - by HH
    I had very errorsome Exception handling with if-clauses. An exception occurs if not found path. An exception returns the function again. The function is recursive. Safe? $ javac SubDirs.java $ java SubDirs Give me an path. . HELLO com TOASHEOU google common annotations base collect internal Give me an path. IT WON'T FIND ME, SO IT RETURNS ITSELF due to Exception caught Give me an path. $ cat SubDirs.java import java.io.*; import java.util.*; public class SubDirs { private List<File> getSubdirs(File file) throws IOException { List<File> subdirs = Arrays.asList(file.listFiles(new FileFilter() { public boolean accept(File f) { return f.isDirectory(); } })); subdirs = new ArrayList<File>(subdirs); List<File> deepSubdirs = new ArrayList<File>(); for(File subdir : subdirs) { deepSubdirs.addAll(getSubdirs(subdir)); } subdirs.addAll(deepSubdirs); return subdirs; } public static void search() { try{ BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); String s; System.out.println("Give me an path."); while ((s = in.readLine()) != null && s.length() != 0){ SubDirs dirs = new SubDirs(); List<File> subDirs = dirs.getSubdirs(new File(s)); for ( File f : subDirs ) { System.out.println(f.getName()); } System.out.println("Give me an path."); } }catch(Exception e){ // Simple but is it safe? search(); } } public static void main(String[] args) throws IOException { search(); } }

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  • how to implement word count bash shell

    - by codemax
    hey guys. I am trying to write my own code for the word count in bash shell. I did usual way. But i wanna use pipe's output to count the word. So for eg the 1st command is cat and i am redirecting to a file called med. Now i have to use to 'dup2' function to count the words in that file. How can i write the code for my wc? This is the code for my shell pgm : void process( char* cmd[], int arg_count ) { pid_t pid; pid = fork(); char path[81]; getcwd(path,81); strcat(path,"/"); strcat(path,cmd[0]); if(pid < 0) { cout << "Fork Failed" << endl; exit(-1); } else if( pid == 0 ) { int fd; fd =open("med", O_RDONLY); dup2(fd ,0); execvp( path, cmd ); } else { wait(NULL); } } And my wordcount is : int main(int argc, char *argv[]) { char ch; int count = 0; ifstream infile(argv[1]); while(!infile.eof()) { infile.get(ch); if(ch == ' ') { count++; } } return 0; } I dont know how to do input redirection i want my code to do this : When i just type wordcount in my shell implementation, I want it to count the words in the med file by default. Thanks in advance

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  • Pressing back button in ActivityGroup causes it to pause, and then continue shutting down the next t

    - by synic
    Pressing the back button causes onPause to be called, and the app stays paused until it is re-launched by clicking on the icon, at which point, onDestroy gets called, and the main activity continues to shut down. Simple class to demonstrate. Note, as far as I can tell, this only happens on the Nexus One. I can't reproduce it in the emulator or on my Droid. package com.vimtips.testshutdown; import android.app.ActivityGroup; import android.os.Bundle; import android.util.Log; import android.view.KeyEvent; public class MainActivity extends ActivityGroup { private static final String TAG = "MainActivity"; private int counter = 3; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } public boolean onKeyDown(int keyCode, KeyEvent event) { if(keyCode == KeyEvent.KEYCODE_BACK) { if(counter-- > 0) return true; } return super.onKeyDown(keyCode, event); } @Override public void onPause() { super.onPause(); Log.d(TAG, "onPause called"); } @Override public void onDestroy() { super.onDestroy(); if(isFinishing()) { Log.d(TAG, "Shutting down"); } } } And here's the log: I/ActivityManager( 132): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10100000 cmp=com.vimtips.testshutdown/.MainActivity } I/ActivityManager( 132): Displayed activity com.vimtips.testshutdown/.MainActivity: 305 ms (total 305 ms) D/MainActivity( 1393): onPause called I/ActivityManager( 132): Displayed activity com.vimtips.testshutdown/.MainActivity: 302 ms (total 302 ms) D/MainActivity( 1393): Shutting down This doesn't appear to happen on a normal Activity, just an Activity group, though looking at Android's sourcecode, I can't figure out why. It's causing some serious problems with my app. Anyone know why this would happen?

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  • Galaxy Nexus (Specificaly) camera startPreview failed

    - by Roman
    I'm having a strange issue on a galaxy nexus when trying to have a live camera view in my app. I get this error in the log cat: 06-29 16:31:26.681 I/CameraClient(133): Opening camera 0 06-29 16:31:26.681 I/CameraHAL(133): camera_device open 06-29 16:31:26.970 D/DOMX (133): ERROR: failed check:(eError == OMX_ErrorNone) || (eError == OMX_ErrorNoMore) - returning error: 0x80001005 - Error returned from OMX API in ducati 06-29 16:31:26.970 E/CameraHAL(133): Error while configuring rotation 0x80001005 06-29 16:31:27.088 I/am_on_resume_called(21274): [0,digifynotes.Activity_Camera] 06-29 16:31:27.111 V/PhoneStatusBar(693): setLightsOn(true) 06-29 16:31:27.205 E/CameraHAL(133): OMX component is not in loaded state 06-29 16:31:27.205 E/CameraHAL(133): setNSF() failed -22 06-29 16:31:27.205 E/CameraHAL(133): Error: CAMERA_QUERY_RESOLUTION_PREVIEW -22 06-29 16:31:27.252 I/MonoDroid(21274): UNHANDLED EXCEPTION: Java.Lang.Exception: Exception of type 'Java.Lang.Exception' was thrown. 06-29 16:31:27.252 I/MonoDroid(21274): at Android.Runtime.JNIEnv.CallVoidMethod (intptr,intptr) <0x00068> 06-29 16:31:27.252 I/MonoDroid(21274): at Android.Hardware.Camera.StartPreview () <0x0007f> 06-29 16:31:27.252 I/MonoDroid(21274): at DigifyNotes.CameraPreviewView.SurfaceChanged (Android.Views.ISurfaceHolder,Android.Graphics.Format,int,int) <0x000d7> 06-29 16:31:27.252 I/MonoDroid(21274): at Android.Views.ISurfaceHolderCallbackInvoker.n_SurfaceChanged_Landroid_view_SurfaceHolder_III (intptr,intptr,intptr,int,int,int) <0x0008b> 06-29 16:31:27.252 I/MonoDroid(21274): at (wrapper dynamic-method) object.4c65d912-497c-4a67-9046-4b33a55403df (intptr,intptr,intptr,int,int,int) <0x0006b> That very same source code works flawlessly on a Samsung Galaxy Ace 2X (4.0.4) and an LG G2X (2.3.7). I will later test on a galaxy s4 if my friend lends it to me. Galaxy Nexus runs Android 4.2.2 I believe. Any one have any ideas? EDIT: Here are my camera classes: [Please note I am using mono] [The formatting is more readable if you view it as raw] Camera Activity: http://pastebin.com/YPcGXJRB Camera Preview View: http://pastebin.com/zNf8AWDf

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  • Problem Parsing JSON Result with jQuery

    - by senfo
    I am attempting to parse JSON using jQuery and I'm running into issues. In the code below, I'm using a static file, but I've also tested using an actual URL. For some reason, the data keeps coming back as null: <!DOCTYPE html> <html> <head> <title>JSON Test</title> <script src="http://code.jquery.com/jquery-latest.js"></script> <script> $.getJSON('results.json', function(data) { alert(data); // Result is always null }); </script> </head> <body> </body> </html> The JSON results look like the following: {"title":"HEALTHPOINT TYEE CAMPUS","link":"http://www.healthpointchc.org","id":"tag:datawarehouse.hrsa.gov,2010-04-29:/8357","org":"HEALTHPOINT TYEE CAMPUS","address":{"street-address":"4424 S. 188TH St.","locality":"Seatac","region":"Washington","postal-code":"98188-5028"},"tel":"206-444-7746","category":"Service Delivery Site","location":"47.4344818181818 -122.277672727273","update":"2010-04-28T00:00:00-05:00"} If I replace my URL with the Flickr API URL (http://api.flickr.com/services/feeds/photos_public.gne?tags=cat&tagmode=any&format=json&jsoncallback=?), I get back a valid JSON result that I am able to make use of. I have successfully validated my JSON at JSONLint, so I've run out of ideas as to what I might be doing wrong. Any thoughts?

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  • Svn repository split problem

    - by Tuminoid
    I want to split a directory from a large Subversion repository to a repository of its own, and keep the history of the files in that directory. I tried the regular way of doing it first svnadmin dump /path/to/repo > largerepo.dump cat largerepo.dump | svndumpfilter include my/directory >mydir.dump but that does not work, since the directory has been moved and copied over the years and files have been moved into and out of it to other parts of the repository. The result is a lot of these: svndumpfilter: Invalid copy source path '/some/old/path' Next thing I tried is to include those /some/old/path as they appear and after a long, long list of files and directories included, the svndumpfilter completes, BUT importing the resulting dump isn't producing the same files as the current directory has. So, how do I properly split the directory from that repository while keeping the history? EDIT: I specifically want trunk/myproj to be the trunk in a new repository PLUS have the new repository include none of the other old stuff, ie. there should not be possibility for anyone to update to old revision before the split and get/see the files. The svndumpfilter solution I tried would achieve exactly that, sadly its not doable since the path/files have been moved around. The solution by ng isn't accetable since its basically a clone+removal of extras which keeps ALL the history, not just relevant myproj history. BUMP C'moon, there must be someone who definitely knows if this is doable or not, and how!

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  • What would cause native gem extensions on OS X to build but fail to load?

    - by goodmike
    I am having trouble with some of my rubygems, in particular those that use native extensions. I am on a MacBookPro, with Snow Leopard. I have XCode 3.2.1 installed, with gcc 4.2.1. Ruby 1.8.6, because I'm lazy and a scaredy cat and don't want to upgrade yet. Ruby is running in 32-bit mode. I built this ruby from scratch when my MBP ran OSX 10.4. When I require one of the affected gems in irb, I get a Load Error for the gem extension's bundle file. For example, here's nokogigi dissing me: > require 'rubygems' = true > require 'nokogiri' LoadError: Failed to load /usr/local/lib/ruby/gems/1.8/gems/nokogiri-1.4.1/lib/nokogiri/nokogiri.bundle This is also happening with the Postgres pg and MongoDB mongo gems. My first thought was that the extensions must not be building right. But gem install wasn't throwing any errors. So I reinstalled with the verbose flag, hoping to see some helpful warnings. I've put the output in a Pastie, and the only warning I see is a consistent one about "passing argument n of ‘foo’ with different width due to prototype." I suspect that this might be an issue from upgrading to Snow Leopard, but I'm a little surprised to experience it now, since I've updated my XCode. Could it stem from running Ruby in 1.8.6? I'm embarrassed that I don't know quite enough about my Mac and OSX to know where to look next, so any guidance, even just a pointer to some document I couldn't find via Google, would be most welcome. Michael

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  • Cross-domain templating with Javascript

    - by Husky
    I'm currently building a Javascript library that can be used to easily create embeddable media based on the URL of a media file, and then be controlled using Javascript methods and events (think something like the Flash / Silverlight JW player). Of course, i could simply cat all the html tags from the Javascript library and send that to the browser: function player(url) { document.write('<object type="foo"><param name="something" value="bar">' + <param name="source" value=" + url + '/></object>'); } But i think this is a very ugly practice that tends to create unmanageable code that is unreadable when you review it a few weeks later. So, a templating solution seems to be the way to go. I've been looking to EJS because it loads the templates using AJAX, so you can manage your templates in separate file instead of directly on the HTML page. There's one 'gotcha' with that: my library needs to be completely cross-domain: the library itself could be located on foo.com while the serving site could be located on bar.com. So if bar.com would want to add a media player using the library it needs to do an AJAX call to a template located on foo.com, which won't work because of the same-origin policy in browsers. AFAIK, there's no library that uses something like JSONP to read and write templates to get around this problem. Could anyone point me to a solution for this problem?

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  • m2crypto aes-256-cbc not working against encoded openssl files.

    - by Gary
    $ echo 'this is text' > text.1 $ openssl enc -aes-256-cbc -a -k "thisisapassword" -in text.1 -out text.enc $ openssl enc -d -aes-256-cbc -a -k "thisisapassword" -in text.enc -out text.2 $ cat text.2 this is text I can do this with openssl. Now, how do I do the same in m2crypto. Documentation is lacking this. I looked at the snv test cases, still nothing there. I found one sample, http://passingcuriosity.com/2009/aes-encryption-in-python-with-m2crypto/ (changed to aes_256_cbc), and it will encrypted/descrypt it's own strings, but it cannot decrypt anything made with openssl, and anything it encrypts isn't decryptable from openssl. I need to be able enc/dec with aes-256-cbc as have many files already encrypted with this and we have many other systems in place that also handle the aes-256-cbc output just fine. We use password phrases only, with no IV. So setting the IV to \0 * 16 makes sense, but I'm not sure if this is also part of the problem. Anyone have any working samples of doing AES 256 that is compatible with m2crypto? I will also be trying some additional libraries and seeing if they work any better.

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  • Use LaTeX Listings to correctly detect and syntax highlight embedded code of a different language in

    - by D W
    I have scripts that have one-liners or sort scripts from other languages within them. How can I have LaTeX listings detect this and change the syntax formating language withing the script? This would be especially useful for awk withing bash I believe. Bash #!/bin/bash ... # usage message to catch bad input without invoking R ... # any bash pre-processing of input ... # etc echo "hello world" R --vanilla << EOF # Data on motor octane ratings for various gasoline blends x <- c(88.5,87.7,83.4,86.7,87.5,91.5,88.6,100.3, 95.6,93.3,94.7,91.1,91.0,94.2,87.5,89.9, 88.3,87.6,84.3,86.7,88.2,90.8,88.3,98.8, 94.2,92.7,93.2,91.0,90.3,93.4,88.5,90.1, 89.2,88.3,85.3,87.9,88.6,90.9,89.0,96.1, 93.3,91.8,92.3,90.4,90.1,93.0,88.7,89.9, 89.8,89.6,87.4,88.9,91.2,89.3,94.4,92.7, 91.8,91.6,90.4,91.1,92.6,89.8,90.6,91.1, 90.4,89.3,89.7,90.3,91.6,90.5,93.7,92.7, 92.2,92.2,91.2,91.0,92.2,90.0,90.7) x length(x) mean(x);var(x) stem(x) EOF perl -n -e ' @t = split(/\t/); %t2 = map { $_ => 1 } split(/,/,$t[1]); $t[1] = join(",",keys %t2); print join("\t",@t); ' knownGeneFromUCSC.txt awk -F'\t' '{ n = split($2, t, ","); _2 = x split(x, _) # use delete _ if supported for (i = 0; ++i <= n;) _[t[i]]++ || _2 = _2 ? _2 "," t[i] : t[i] $2 = _2 }-3' OFS='\t' infile Python #!/usr/local/bin/python print "Hello World" os.system(""" VAR=even; sed -i "s/$VAR/odd/" testfile; for i in `cat testfile` ; do echo $i; done; echo "now the tr command is removing the vowels"; cat testfile |tr 'aeiou' ' ' """)

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  • paypal verify payment

    - by yozhik
    I am testing PayPal payments through Sandbox. So what do I do: Make a payment from my Android device, using SDK AppID: "APP-80W284485P519543T". Receive RESULT_OK in applicationResult and receive response on server side through IPN service. Now I am taking all responce from IPN and send it to paypal verification sandbox server to verify payment. It cat return (VERIFIED or INVALID). But the problem is that it is return INVALID. So whats can be the problem? What I am doing wrong? Thanks. This is what I send to verify: https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_notify-validate&payment_request_date=Mon+Mar+26+02%3A37%3A10+PDT+2012&fees_payer=EACHRECEIVER&transaction[0].is_primary_receiver=false&memo=Buy+1500+coins&transaction_type=Adaptive+Payment+PAY&verify_sign=AWimjEpfvS2eR6IgBwHtiwM0rMDUA.b2twU2ADjkAY-kg5szeluxcqKb&log_default_shipping_address_in_transaction=false&pay_key=AP-2YR77828AV574621G&transaction[0].amount=USD+1.99&reverse_all_parallel_payments_on_error=true&ipn_notification_url=http%3A%2F%2Fdev-vs.upiter.com%2Fvspayment%2Fproviders%2Fvs%2Ffb%2Fpaypalcallback&action_type=CREATE&notify_version=UNVERSIONED&transaction[0].status_for_sender_txn=Pending&test_ipn=1&cancel_url=https%3A%2F%2Fwww.paypal.com&transaction[0].pending_reason=UNILATERAL&status=COMPLETED&charset=windows-1252&transaction[0].paymentType=GOODS&request_body=&request_url=http%3A%2F%2Fdev-vs-mobile.stagika.com%2Fvspayment%2Fproviders%2Fvs%2Ffb%2Fpaypalcallback&return_url=https%3A%2F%2Fwww.paypal.com&transaction[0].receiver=a.merchant1.kv%40gmail.com&request_method=POST&transaction[0].id_for_sender_txn=0X355330VH030952T&sender.useCredentials=true

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  • grep 5 seconds of input from the serial port inside a shell-script

    - by pica
    I've got a device that I'm operating next to my PC and as it runs it's spitting log lines out it's serial port. I have this wired to my PC and I can see the log lines fine if I'm using either minicom or something like: ttylog -b 115200 -d /dev/ttyS0 I want to write 5 seconds of the device serial output to a temp file (or assign it to a variable) and then later grep that file for keywords that will let me know how the device is operating. I've already tried redirecting the output to a file while running the command in the background, and then sleeping 5 seconds and killing the process, but the log lines never get written to my temp file. Example: touch tempFile ttylog -b 115200 -d /dev/ttyS0 >> tempFile & serialPID=$! sleep 5 #kill ${serialPID} #does not work, gets wrong PID killall ttylog cat tempFile The file gets created but never filled with any data. I can also replace the ttylog line with: ttylog -b 115200 -d /dev/ttyS0 |tee -a tempFile & In neither case do I ever see any log lines logged to stdout or the log file unless I have multiple versions of ttylog running by mistake (see commented out line, D'oh). I have no idea what's going on here. It seems to be a failure of redirection within my script. Am I on the right track? Is there a better way to sample 5 seconds of the serial port?

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  • Why is curl in Ruby slower than command-line curl?

    - by Stiivi
    I am trying to download more than 1m pages (URLs ending by a sequence ID). I have implemented kind of multi-purpose download manager with configurable number of download threads and one processing thread. The downloader downloads files in batches: curl = Curl::Easy.new batch_urls.each { |url_info| curl.url = url_info[:url] curl.perform file = File.new(url_info[:file], "wb") file << curl.body_str file.close # ... some other stuff } I have tried to download 8000 pages sample. When using the code above, I get 1000 in 2 minutes. When I write all URLs into a file and do in shell: cat list | xargs curl I gen all 8000 pages in two minutes. Thing is, I need it to have it in ruby code, because there is other monitoring and processing code. I have tried: Curl::Multi - it is somehow faster, but misses 50-90% of files (does not download them and gives no reason/code) multiple threads with Curl::Easy - around the same speed as single threaded Why is reused Curl::Easy slower than subsequent command line curl calls and how can I make it faster? Or what I am doing wrong? I would prefer to fix my download manager code than to make downloading for this case in a different way. Before this, I was calling command-line wget which I provided with a file with list of URLs. Howerver, not all errors were handled, also it was not possible to specify output file for each URL separately when using URL list. Now it seems to me that the best way would be to use multiple threads with system call to 'curl' command. But why when I can use directly Curl in Ruby? Code for the download manager is here, if it might help: Download Manager (I have played with timeouts, from not-setting it to various values, it did not seem help) Any hints appreciated.

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  • php POST response

    - by amit
    I am making a POST to another php file that I want to render in the browser. so clearly, using jquery POST wont work, since it works through AJAX. echo '<div class="showcase_URL"><a class="purl" name="'.$row->num.'" href="#">PROJECT URL</a></div>'; what I have till now in javascript is: $(".showcase_URL a").click(function() { //alert($(this).attr("name")); var number = $(this).attr("name"); $.post( "app-display.php", {app: number}, function(data){ top.location.href = 'app-display.php'; }); }); what I have in app-display.php: $query = 'SELECT num, title, thumb_url, url, type, cat, dated, details FROM app WHERE `num` = "$_POST[app]"'; but it is currently giving me a page without the contents of app-display.php. all the other fragments of the page are loading: header, footer etc. the PHP Response (in Firebug) I am getting is the normal html of the page. how should i do it?

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  • How do I so a select input for a STI column in a Rails model?

    - by James A. Rosen
    I have a model with single-table inheritance on the type column: class Pet < ActiveRecord::Base TYPES = [Dog, Cat, Hamster] validates_presence_of :name end I want to offer a <select> dropdown on the new and edit pages: <% form_for @model do |f| %> <%= f.label :name %> <%= f.text_input :name %> <%= f.label :type %> <%= f.select :type, Pet::TYPES.map { |t| [t.human_name, t.to_s] } %> <% end %> That gives me the following error: ActionView::TemplateError (wrong argument type String (expected Module)) I read a suggestion to use an alias for the field #type since Ruby considers that a reserved word that's the same as #class. I tried both class Pet < ActiveRecord::Base ... alias_attribute :klass, :type end and class Pet < ActiveRecord::Base ... def klass self.type end def klass=(k) self.type = k end end Neither worked. Any suggestions? Oddly, it works fine on my machine (MRI 1.8.6 on RVM), but fails on the staging server (MRI 1.8.7 not on RVM).

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  • Wordpress display featured posts outside of loop

    - by Thomas
    Im new to WP and Im not real sure how to work with the loop. I am trying to display featured posts in the sidebar with this code: <?php query_posts('cat=5'); $url = get_permalink(); while(have_posts()){ the_post(); $image_tag = wp_get_post_image('return_html=true'); $resized_img = getphpthumburl($image_tag,'h=168&w=168&zc=1'); $title = $post->post_title; echo "<ul class='left_featured'>"; echo "<li><a href='"; echo $url; echo "'><img src='$resized_img' width='168' height='168' "; echo "'/></a></li>"; echo "<li><a href='"; echo $url; echo "'/>"; echo $title; echo "</a></li></ul>"; echo ""; }; ?> This gives me all sorts of crazy outputs, text from random posts, images, etc...Its supposed to output a list of images and titles for all of the posts in a certain category. Any help would be really appreciated. Oh yeah, I am using a plugin that resizes images on the fly, thats what the the wp_get_post_image/getphpthumburl business is.

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  • Completely bizarre Firefox CSS bug

    - by Jason
    I've been doing front end development for a long time, and I have NEVER come across a bug like this before... Save the following HTML to a file and view it in Firefox (mine is 3.6.3): <html xmlns="http://www.w3.org/1999/xhtml"> <head> <style type="text/css"> body { font-family: Helvetica, Sans-Serif;} h2 {font-weight: normal;} </style> </head> <body> <h2>Some normal text <strong>some bold text</strong> weird huh?</h2> </body> </html> If you don't want to give it a shot the output is like your cat walked across your keyboard while character map was turned on, except in the strong tags. I feel like this may be a font issue? When I get rid of font-weight: normal it goes back to normal, but I don't want everything to be bolded in my h2... Anyone have any ideas? More importantly, is anyone able to reproduce this?? Thanks.

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  • Connecting to SFTP service via Java Runtime process

    - by ohseekay
    Under my project, I have a Java class file, inside of which I have a routine which executes the following external SFTP script file: #!/bin/sh echo "cd AV/OASIS" >> sftp echo "put $1 $2" >> sftp echo "get AV/OASIS/$2 $3$2" >> sftp echo "bye" >> sftp /usr/local/bin/sftp -b sftp id@domain cat /dev/null > sftp exit 0 The Java code which executes the script file is as below: String script = "full path of script"; Process p = Runtime.getRuntime().exec(script + " " + param1 + " " + param2 + " " + param3); However, I'm not sure why, but the log generated by the class file always shows the error "Host key verification failed. Connection closed." I'd isolated that line in the script which connected to the remote machine, and ran it on the local machine (where this class file and script file are stored), and the command executed successfully I'd manually run the command which the Java class file will execute and it also tested okay: $ script.sh param1 param2 param3 I'd tried to look up the error message on the Internet, and apparently it seems to have something to do with known_hosts. Could this be the reason, or is there something else I'm missing? Thanks so much!

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  • Generate a set of strings with maximum edit distance

    - by Kevin Jacobs
    Problem 1: I'd like to generate a set of n strings of fixed length m from alphabet s such that the minimum Levenshtein distance (edit distance) between any two strings is greater than some constant c. Obviously, I can use randomization methods (e.g., a genetic algorithm), but was hoping that this may be a well-studied problem in computer science or mathematics with some informative literature and an efficient algorithm or three. Problem 2: Same as above except that adjacent characters cannot repeat; the i'th character in each string may not be equal to the i+1'th character. E.g., 'CAT', 'AGA' and 'TAG' are allowed, 'GAA', 'AAT', and 'AAA' are not. Background: The basis for this problem is bioinformatic and involves designing unique DNA tags that can be attached to biologically derived DNA fragments and then sequenced using a fancy second generation sequencer. The goal is to be able to recognize each tag, allowing for random insertion, deletion, and substitution errors. The specific DNA sequencing technology has a relatively low error rate per base (~1%), but is less precise when a single base is repeated 2 or more times (motivating the additional constraints imposed in problem 2).

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  • no such file to load -- rubygems (LoadError)

    - by Vineeth
    Hello, I recently installed rails in fedora 12. I'm new to linux as well. Everything works fine on Windows 7. But I'm facing lot of problems in linux. Help please! I've installed all the essentials to my knowledge to get the basic script/server up and running. I have this error from boot.rb popping up when I try script/server. Some of the details I'd like to give here: The directories where rails, ruby and gem are installed, [vineeth@localhost my_app]$ which ruby /usr/local/bin/ruby [vineeth@localhost my_app]$ which rails /usr/bin/rails [vineeth@localhost my_app]$ which gem /usr/bin/gem And when I run the script/server, this is the error. [vineeth@localhost my_app]$ script/server ./script/../config/boot.rb:9:in `require': no such file to load -- rubygems (LoadError) from ./script/../config/boot.rb:9 from script/server:2:in `require' from script/server:2 And the PATH file looks like this [vineeth@localhost my_app]$ cat ~/.bash_profile # .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs PATH=$PATH:$HOME/bin export PATH="/usr/local/bin:/usr/local/sbin:/usr/bin/ruby:$PATH" I suppose it is something to do with the PATH file. Let me know what I need to change here. If there are other changes I should make, please let me know, Thanks

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  • Correct initialization sequence for Linux serial port

    - by whitequark
    I wrote an application that must use serial ports on Linux, especially ttyUSB ones. Reading and writing operations are performed with standard select()/read() loop and write(), and there is probably nothing wrong in them, but initialization code (or absence of some part of it) damages something in the tty subsystem. Here it is: vuxboot(string filename, unsigned baud = B115200) : _debug(false) { _fd = open(filename.c_str(), O_RDWR | O_NOCTTY); if(!_fd) throw new io_error("cannot open port"); // Serial initialization was written with FTDI USB-to-serial converters // in mind. Anyway, who wants to use non-8n1 protocol? tcgetattr(_fd, &_termios); termios tio = {0}; tio.c_iflag = IGNPAR; tio.c_oflag = 0; tio.c_cflag = baud | CLOCAL | CREAD | CS8; tio.c_lflag = 0; tcflush(_fd, TCIFLUSH); tcsetattr(_fd, TCSANOW, &tio); } Another tcsetattr(_fd, TCSANOW, &_termios) sits in the destructor, but it is irrelevant. With or without this termios initialization, strange things happen in system after the application exits. Sometimes plain cat (or hd) exits immediately printing nothing or same stuff each time, sometimes it is waiting and not displaying any of the data that is surely sent onto the port; and close() (read() too, but not every time) emits a strange WARNING to dmesg referring to usb-serial.c. I checked the hardware and firmware tens of times (even on different machines) and I am sure it is working as intended; moreover, I stripped the firmware to just print same message over and over. How can I use serial port without destroying anything? Thanks.

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  • Handling Status Bar notification

    - by MAkS
    in my app a background service starts and from that service i want to set Status bar notification, that the service has Started following is the code : Context context = getApplicationContext(); String ns = Context.NOTIFICATION_SERVICE; int icon = R.drawable.icon; CharSequence tickerText = "Hello"; long when = System.currentTimeMillis(); Notification notification = new Notification(icon, tickerText, when); CharSequence contentTitle = "My notification"; CharSequence contentText = "Hello World!"; Intent notificationIntent = new Intent(MyService.this, MyClass.class); notificationIntent.setFlags( Intent.FLAG_ACTIVITY_NEW_TASK); PendingIntent contentIntent = PendingIntent.getActivity(this,0,notificationIntent,0); notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent); NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns); mNotificationManager.notify(1, notification); Notification is displayed in Status bar But whin i click on that MyClass.class is not fired.And in log cat it shows "Input Manager Service Window already focused ignoring focuson ...." so plz provide solution. thanks in advance

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  • Compile subversion on CentOs

    - by peter
    I have downloaded, compiled and installed so far: apr-1.3.9 apr-util-1.3.9 sqlite-3.6.23 zlib-1.2.4 libtool-2.2.6b Now after downloading subversion-1.6.9, the config works fine but compiling it will end with the following error: cd subversion/svn && /bin/sh /root/subversion-1.6.9/libtool --tag=CC --silent --mode=link gcc -g -O2 -g -O2 -pthread -rpath /usr/local/lib -o svn add-cmd.o blame-cmd.o cat-cmd.o changelist-cmd.o checkout-cmd.o cleanup-cmd.o commit-cmd.o conflict-callbacks.o copy-cmd.o delete-cmd.o diff-cmd.o export-cmd.o help-cmd.o import-cmd.o info-cmd.o list-cmd.o lock-cmd.o log-cmd.o main.o merge-cmd.o mergeinfo-cmd.o mkdir-cmd.o move-cmd.o notify.o propdel-cmd.o propedit-cmd.o propget-cmd.o proplist-cmd.o props.o propset-cmd.o resolve-cmd.o resolved-cmd.o revert-cmd.o status-cmd.o status.o switch-cmd.o tree-conflicts.o unlock-cmd.o update-cmd.o util.o ../../subversion/libsvn_client/libsvn_client-1.la ../../subversion/libsvn_wc/libsvn_wc-1.la ../../subversion/libsvn_ra/libsvn_ra-1.la ../../subversion/libsvn_delta/libsvn_delta-1.la ../../subversion/libsvn_diff/libsvn_diff-1.la ../../subversion/libsvn_subr/libsvn_subr-1.la /usr/local/apr/lib/libaprutil-1.la -lexpat /usr/local/apr/lib/libapr-1.la -lrt -lcrypt -lpthread -ldl /usr/bin/ld: cannot find -lexpat collect2: ld returned 1 exit status make: * [subversion/svn/svn] Error 1 The file at /usr/local/apr/lib/libapr-1.la exists and seems to be OK (from permission perspective What could be the problem here? Thanks Peter

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  • Java: 2-assignments-2-initializations inside for-loop not allowed?

    - by HH
    $ javac MatchTest.java MatchTest.java:7: ')' expected for((int i=-1 && String match="hello"); (i=text.indexOf(match)+1);) ^ MatchTest.java:7: ';' expected for((int i=-1 && String match="hello"); (i=text.indexOf(match)+1);) ^ MatchTest.java:7: ';' expected for((int i=-1 && String match="hello"); (i=text.indexOf(match)+1);) ^ MatchTest.java:7: not a statement for((int i=-1 && String match="hello"); (i=text.indexOf(match)+1);) ^ MatchTest.java:7: illegal start of expression for((int i=-1 && String match="hello"); (i=text.indexOf(match)+1);) ^ 5 errors $ cat MatchTest.java import java.util.*; import java.io.*; public class MatchTest { public static void main(String[] args){ String text = "hello0123456789hello0123456789hello1234567890hello3423243423232"; for((int i=-1 && String match="hello"); (i=text.indexOf(match)+1);) System.out.println(i); } }

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