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Urllib's urlopen broken on some sites (e.g. StackApps api)

- by Edan Maor

I'm using urllib2's urlopen function to try and get a JSON result from the StackOverflow api. The code I'm using: >>> import urllib2 >>> conn = urllib2.urlopen("http://api.stackoverflow.com/0.8/users/") >>> conn.readline() The result I'm getting: '\x1f\x8b\x08\x00\x00\x00\x00\x00\x04\x00\xed\xbd\x07`\x1cI\x96%&/m\xca{\x7fJ\... I'm fairly new to urllib, but this doesn't seem like the result I should be getting. I've tried it in other places and I get what I expect (the same as visiting the address with a browser gives me: a JSON object). Using urlopen on other sites (e.g. "http://google.com") works fine, and gives me actual html. I've also tried using urllib and it gives the same result. I'm pretty stuck, not even knowing where to look to solve this problem. Any ideas?

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jQuery selective hover

- by Vitor

Hello everyone, I'm trying to do a simple task with jQuery: I have a list of words which, when hovered, should fadeIn its corresponding image. For example: <a href="#" class="yellow">Yellow</a> <a href="#" class="blue">Blue</a> <a href="#" class="green">Green</a> <img src="yellow.jpg" class="yellow"> <img src="blue.jpg" class="blue"> <img src="green.jpg" class="green"> I'm currently doing it this way for each link/image: $('a.yellow').hover( function () { $('img.yellow').fadeIn('fast'); }, function () { $('img.yellow').fadeOut('fast'); }); The method above works fine, but as I'm still learning, I guess there's a better way to do that instead of repeating functions. Can anyone give me some light here? How can I improve this code?

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Urllib's urlopen breaking on some sites (e.g. StackApps api): returns garbage results

- by Edan Maor

I'm using urllib2's urlopen function to try and get a JSON result from the StackOverflow api. The code I'm using: >>> import urllib2 >>> conn = urllib2.urlopen("http://api.stackoverflow.com/0.8/users/") >>> conn.readline() The result I'm getting: '\x1f\x8b\x08\x00\x00\x00\x00\x00\x04\x00\xed\xbd\x07`\x1cI\x96%&/m\xca{\x7fJ\... I'm fairly new to urllib, but this doesn't seem like the result I should be getting. I've tried it in other places and I get what I expect (the same as visiting the address with a browser gives me: a JSON object). Using urlopen on other sites (e.g. "http://google.com") works fine, and gives me actual html. I've also tried using urllib and it gives the same result. I'm pretty stuck, not even knowing where to look to solve this problem. Any ideas?

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Urllib's urlopen broken on some sites (StackApps api)

- by Edan Maor

I'm using urllib2's urlopen function to try and get a JSON result from the StackOverflow api. The code I'm using: >>> import urllib2 >>> conn = urllib2.urlopen("http://api.stackoverflow.com/0.8/users/") >>> conn.readline() The result I'm getting: '\x1f\x8b\x08\x00\x00\x00\x00\x00\x04\x00\xed\xbd\x07`\x1cI\x96%&/m\xca{\x7fJ\... I'm fairly new to urllib, but this doesn't seem like the result I should be getting. I've tried it in other places and I get what I expect (the same as visiting the address with a browser gives me: a JSON object). Using urlopen on other sites (e.g. "http://google.com") works fine, and gives me actual html. I've also tried using urllib and it gives the same result. I'm pretty stuck, not even knowing where to look to solve this problem. Any ideas?

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terminate called after throwing an instance of 'std::length_error'

- by mark

hello all, this is my first post here. As i am newbie, the problem might be stupid. I was writing a piece of code while the following error message shown, terminate called after throwing an instance of 'std::length_error' what(): basic_string::_S_create /home/gcj/finals /home/gcj/quals where Aborted the following is the offending code especially Line 39 to Line 52. It is weired for me as this block of code is almost same as the Line64 to Line79. int main(){ std::vector<std::string> dirs, need; std::string tmp_str; std::ifstream fp_in("small.in"); std::ofstream fp_out("output"); std::string::iterator iter_substr_begin, iter_substr_end; std::string slash("/"); int T, N, M; fp_in>>T; for (int t = 0; t < T; t++){ std::cout<<" time "<< t << std::endl; fp_in >> N >> M; for (int n =0; n<N; n++){ fp_in>>tmp_str; dirs.push_back(tmp_str); tmp_str.clear(); } for (int m=0; m<M; m++){ fp_in>>tmp_str; need.push_back(tmp_str); tmp_str.clear(); } for (std::vector<std::string>::iterator iter = dirs.begin(); iter!=dirs.end(); iter++){ for (std::string::iterator iter_str = (*iter).begin()+1; iter_str<(*iter).end(); ++iter_str){ if ((*iter_str)=='/') { std::string tmp_str2((*iter).begin(), iter_str); if (find(dirs.begin(), dirs.end(), tmp_str2)==dirs.end()) { dirs.push_back(tmp_str2); } } } } for (std::vector<std::string>::iterator iter_tmp = dirs.begin(); iter_tmp!= dirs.end(); ++iter_tmp) std::cout<<*iter_tmp<<" "; dirs.clear(); std::cout<<std::endl; std::cout<<" need "<<std::endl; //processing the next for (std::vector<std::string>::iterator iter_tmp = need.begin(); iter_tmp!=need.end(); ++iter_tmp) std::cout<<*iter_tmp<<" "; std::cout<<" where "; for (std::vector<std::string>::iterator iter = need.begin(); iter!=need.end(); iter++){ for (std::string::iterator iter_str = (*iter).begin()+1; iter_str<(*iter).end(); ++iter_str){ if ((*iter_str)=='/') { std::string tmp_str2((*iter).begin(), iter_str); if (find(need.begin(), need.end(), tmp_str2)==need.end()) { need.push_back(tmp_str2); } } } } for (std::vector<std::string>::iterator iter_tmp = need.begin(); iter_tmp!= need.end(); ++iter_tmp) std::cout<<*iter_tmp<<" "; need.clear(); std::cout<<std::endl; //finish processing the next } for (std::vector<std::string>::iterator iter= dirs.begin(); iter!=dirs.end(); iter++) std::cout<<*iter<<" "; std::cout<<std::endl; for (std::vector<std::string>::iterator iter= need.begin(); iter!=need.end(); iter++) std::cout<<*iter<<" "; std::cout<<std::endl; fp_out.close(); } best regards, Mark

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MATLAB: dealing with java.lang.String

- by Jason S

I seem to be stuck in Kafka-land, with a java.lang.String that I can't seem to use in MATLAB functions: K>> name name = Jason K>> sprintf('%s', name) ??? Error using ==> sprintf Function is not defined for 'java.lang.String' inputs. K>> ['my name is ' name] ??? Error using ==> horzcat The following error occurred converting from char to opaque: Error using ==> horzcat Undefined function or method 'opaque' for input arguments of type 'char'. how can I get a java.lang.String to convert to a regular MATLAB character array?

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Proper way to set class variables

- by ensnare

I'm writing a class to insert users into a database, and before I get too far in, I just want to make sure that my OO approach is clean: class User(object): def setName(self,name): #Do sanity checks on name self._name = name def setPassword(self,password): #Check password length > 6 characters #Encrypt to md5 self._password = password def commit(self): #Commit to database >>u = User() >>u.setName('Jason Martinez') >>u.setPassword('linebreak') >>u.commit() Is this the right approach? Should I declare class variables up top? Should I use a _ in front of all the class variables to make them private? Thanks for helping out.

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flex chart grid lines dotted

- by Jonny

Using the LineChart component of Flex: How do I make the horizontal grid lines (background within the chart) dotted? With the mx:Stroke within the mx:horizontalStroke, I can only set properties like weight, color and alpha. I'd like to make the line dotted... This is what I have now: <mx:LineChart id="linechartDays" width="100%" height="100%" dataProvider="{dayData}" showDataTips="true"> <mx:backgroundElements> <mx:GridLines horizontalChangeCount="1" direction="horizontal"> <mx:horizontalStroke> <mx:Stroke weight="1" color="0xcccccc"/> </mx:horizontalStroke> </mx:GridLines> </mx:backgroundElements> </mx:LineChart>

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Show and hide divs at a specific time interval using jQuery

- by Webrsk

I would like to show divs at a specific interval (10 seconds) and show next div and as go on and repeat the same. ** Sequence : ** On 10th second show div1 , hide other divs , After 5seconds interval Show div 2 and hide other divs, After 5 seconds interval Show div 3 and hide other divs, and repeat the same for every 10 seconds. Code Follows: <div id='div1' style="display:none;">  </div> <div id='div2' style="display:none;">  </div> <div id='div3' style="display:none;">  </div>

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Capturing WPF Listbox checkbox selection

- by wonea

Been trying to figure out, how do I capture the events from a listbox. In the template, I've added the parameter IsChecked="" which starts my method. However, the problem is trying to capture what has been checked in the method. SelectedItem only returns what is currently selected, not the checkbox. object selected = thelistbox.SelectedItem; DataRow row = ((DataRowView)selected).Row; string teststring = row.ItemArray[0].ToString(); // Doesn't return the checkbox! <ListBox IsSynchronizedWithCurrentItem="True" Name="thelistbox" ItemsSource="{Binding mybinding}"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel> <CheckBox Content="{Binding personname}" Checked="CheckBox_Checked" Name="thecheckbox"/> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox>

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Why my button can trigger the UI to scroll and my TimerTask inside the activity can't?

- by Spidey

Long Story Short: a method of my activity updates and scrolls the ListView through an ArrayAdapter like it should, but a method of an internal TimerTask for polling messages (which are displayed in the ListView) updates the ListView, but don't scroll it. Why? Long Story: I have a chat activity with this layout: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#fff" > <ListView android:id="@+id/messageList" android:layout_width="fill_parent" android:layout_height="fill_parent" android:stackFromBottom="true" android:transcriptMode="alwaysScroll" android:layout_weight="1" android:fadeScrollbars="true" /> <LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center" > <EditText android:id="@+id/message" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1" /> <Button android:id="@+id/button_send" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Send" android:onClick="sendMessage" /> </LinearLayout> </LinearLayout> The internal listView (with id messageList) is populated by an ArrayAdapter which inflates the XML below and replaces strings in it. <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content" android:clickable="false" android:background="#fff" android:paddingLeft="2dp" android:paddingRight="2dp" > <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/date" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="16sp" android:textColor="#00F" android:typeface="monospace" android:text="2010-10-12 12:12:03" android:gravity="left" /> <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/sender" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textSize="16sp" android:textColor="#f84" android:text="spidey" android:gravity="right" android:textStyle="bold" /> <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/body" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textSize="14sp" android:padding="1dp" android:gravity="left" android:layout_below="@id/date" android:text="Mensagem muito legal 123 quatro cinco seis." android:textColor="#000" /> </RelativeLayout> The problem is: in the main layout, I have a EditText for the chat message, and a Button to send the message. I have declared the adapter in the activity scope: public class ChatManager extends Activity{ private EditText et; private ListView lv; private Timestamp lastDate = null; private long campaignId; private ChatAdapter ca; private List<ChatMessage> vetMsg = new ArrayList<ChatMessage>(); private Timer chatPollingTimer; private static final int CHAT_POLLING_PERIOD = 10000; ... } So, inside sendMessage(View v), the notifyDataSetChanged() scrolls the ListView acordingly, so I can see the latest chat messages automatically: public void sendMessage(View v) { String msg = et.getText().toString(); if(msg.length() == 0){ return; } et.setText(""); String xml = ServerCom.sendAndGetChatMessages(campaignId, lastDate, msg); Vector<ChatMessage> vetNew = Chat.parse(new InputSource(new StringReader(xml))); //Pegando a última data if(!vetNew.isEmpty()){ lastDate = vetNew.lastElement().getDateSent(); //Atualizando a tela vetMsg.addAll(vetNew); ca.notifyDataSetChanged(); } } But inside my TimerTask, I can't. The ListView IS UPDATED, but it just don't scroll automatically. What am I doing wrong? private class chatPollingTask extends TimerTask { @Override public void run() { String xml; if(lastDate != null){ //Chama o Updater xml = ServerCom.getChatMessages(campaignId, lastDate); }else{ //Chama o init denovo xml = ServerCom.getChatMessages(campaignId); } Vector<ChatMessage> vetNew = Chat.parse(new InputSource(new StringReader(xml))); if(!(vetNew.isEmpty())){ //TODO: descobrir porque o chat não está rolando quando chegam novas mensagens //Descobrir também como forçar o rolamento, enquanto o bug não for corrigido. Log.d("CHAT", "New message(s) acquired!"); lastDate = vetNew.lastElement().getDateSent(); vetMsg.addAll(vetNew); ca.notifyDataSetChanged(); } } } How can I force the scroll to the bottom? I've tried using scrollTo using lv.getBottom()-lv.getHeight(), but didn't work. Is this a bug in the Android SDK? Sorry for the MASSIVE amount of code, but I guess this way the question gets pretty clear.

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Hung JVM consuming 100% CPU

- by Bogdan

We have a JAVA server running on Sun JRE 6u20 on Linux 32-bit (CentOS). We use the Server Hotspot with CMS collector with the following options (I've only provided the relevant ones): -Xmx896m -Xss128k -XX:NewSize=384M -XX:MaxPermSize=96m -XX:+UseParNewGC -XX:+UseConcMarkSweepGC Sometimes, after running for a while, the JVM seems to slip into a hung state, whereby even though we don't make any requests to the application, the CPU continues to spin at 100% (we have 8 logical CPUs, so it looks like only one CPU does the spinning). In this state the JVM doesn't respond to SIGHUP signals (kill -3) and we can't connect to it normally with jstack. We CAN connect with "jstack -F", but the output is dodgy (we can see lots of NullPointerExceptions from JStack apparently because it wasn't able to 'walk' some stacks). So the "jstack -F" output seems to be useless. We have run a stack dump from "gdb" though, and we were able to match the thread id that spins the CPU (we found that using "top" with a per-thread view - "H" option) with a thread stack that appears in the gdb result and this is how it looks like: Thread 443 (Thread 0x7e5b90 (LWP 26310)): #0 0x0115ebd3 in CompactibleFreeListSpace::block_size(HeapWord const*) const () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #1 0x01160ff9 in CompactibleFreeListSpace::prepare_for_compaction(CompactPoint*) () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #2 0x0123456c in Generation::prepare_for_compaction(CompactPoint*) () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #3 0x01229b2c in GenCollectedHeap::prepare_for_compaction() () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #4 0x0122a7fc in GenMarkSweep::invoke_at_safepoint(int, ReferenceProcessor*, bool) () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #5 0x01186024 in CMSCollector::do_compaction_work(bool) () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #6 0x011859ee in CMSCollector::acquire_control_and_collect(bool, bool) () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #7 0x01185705 in ConcurrentMarkSweepGeneration::collect(bool, bool, unsigned int, bool) () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #8 0x01227f53 in GenCollectedHeap::do_collection(bool, bool, unsigned int, bool, int) () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #9 0x0115c7b5 in GenCollectorPolicy::satisfy_failed_allocation(unsigned int, bool) () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #10 0x0122859c in GenCollectedHeap::satisfy_failed_allocation(unsigned int, bool) () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #11 0x0158a8ce in VM_GenCollectForAllocation::doit() () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #12 0x015987e6 in VM_Operation::evaluate() () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #13 0x01597c93 in VMThread::evaluate_operation(VM_Operation*) () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #14 0x01597f0f in VMThread::loop() () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #15 0x015979f0 in VMThread::run() () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #16 0x0145c24e in java_start(Thread*) () from /usr/java/jdk1.6.0_20/jre/lib/i386/server/libjvm.so #17 0x00ccd46b in start_thread () from /lib/libpthread.so.0 #18 0x00bc2dbe in clone () from /lib/libc.so.6 It seems that a JVM thread is spinning while doing some CMS related work. We have checked the memory usage on the box, there seems to be enough memory available and the system is not swapping. Has anyone come across such a situation? Does it look like a JVM bug? UPDATE I've obtained some more information about this problem (it happened again on a server that has been running for more than 7 days). When the JVM entered the "hung" state it stayed like that for 2 hours until the server was manually restarted. We have obtained a core dump of the process and the gc log. We tried to get a heap dump as well, but "jmap" failed. We tried to use jmap -F but then only a 4Mb file was written before the program aborted with an exception (something about the a memory location not being accessible). So far I think the most interesting information comes from the gc log. It seems that the GC logging stopped as well (possibly at the time when the VM thread went into the long loop): 657501.199: [Full GC (System) 657501.199: [CMS: 400352K->313412K(524288K), 2.4024120 secs] 660634K->313412K(878208K), [CMS Perm : 29455K->29320K(68568K)], 2.4026470 secs] [Times: user=2.39 sys=0.01, real=2.40 secs] 657513.941: [GC 657513.941: [ParNew: 314624K->13999K(353920K), 0.0228180 secs] 628036K->327412K(878208K), 0.0230510 secs] [Times: user=0.08 sys=0.00, real=0.02 secs] 657523.772: [GC 657523.772: [ParNew: 328623K->17110K(353920K), 0.0244910 secs] 642036K->330523K(878208K), 0.0247140 secs] [Times: user=0.08 sys=0.00, real=0.02 secs] 657535.473: [GC 657535.473: [ParNew: 331734K->20282K(353920K), 0.0259480 secs] 645147K->333695K(878208K), 0.0261670 secs] [Times: user=0.11 sys=0.00, real=0.02 secs] .... .... 688346.765: [GC [1 CMS-initial-mark: 485248K(524288K)] 515694K(878208K), 0.0343730 secs] [Times: user=0.03 sys=0.00, real=0.04 secs] 688346.800: [CMS-concurrent-mark-start] 688347.964: [CMS-concurrent-mark: 1.083/1.164 secs] [Times: user=2.52 sys=0.09, real=1.16 secs] 688347.964: [CMS-concurrent-preclean-start] 688347.969: [CMS-concurrent-preclean: 0.004/0.005 secs] [Times: user=0.00 sys=0.01, real=0.01 secs] 688347.969: [CMS-concurrent-abortable-preclean-start] CMS: abort preclean due to time 688352.986: [CMS-concurrent-abortable-preclean: 2.351/5.017 secs] [Times: user=3.83 sys=0.38, real=5.01 secs] 688352.987: [GC[YG occupancy: 297806 K (353920 K)]688352.987: [Rescan (parallel) , 0.1815250 secs]688353.169: [weak refs processing, 0.0312660 secs] [1 CMS-remark: 485248K(524288K)] 783055K(878208K), 0.2131580 secs] [Times: user=1.13 sys =0.00, real=0.22 secs] 688353.201: [CMS-concurrent-sweep-start] 688353.903: [CMS-concurrent-sweep: 0.660/0.702 secs] [Times: user=0.91 sys=0.07, real=0.70 secs] 688353.903: [CMS-concurrent-reset-start] 688353.912: [CMS-concurrent-reset: 0.008/0.008 secs] [Times: user=0.01 sys=0.00, real=0.01 secs] 688354.243: [GC 688354.243: [ParNew: 344928K->30151K(353920K), 0.0305020 secs] 681955K->368044K(878208K), 0.0308880 secs] [Times: user=0.15 sys=0.00, real=0.03 secs] .... .... 688943.029: [GC 688943.029: [ParNew: 336531K->17143K(353920K), 0.0237360 secs] 813250K->494327K(878208K), 0.0241260 secs] [Times: user=0.10 sys=0.00, real=0.03 secs] 688950.620: [GC 688950.620: [ParNew: 331767K->22442K(353920K), 0.0344110 secs] 808951K->499996K(878208K), 0.0347690 secs] [Times: user=0.11 sys=0.00, real=0.04 secs] 688956.596: [GC 688956.596: [ParNew: 337064K->37809K(353920K), 0.0488170 secs] 814618K->515896K(878208K), 0.0491550 secs] [Times: user=0.18 sys=0.04, real=0.05 secs] 688961.470: [GC 688961.471: [ParNew (promotion failed): 352433K->332183K(353920K), 0.1862520 secs]688961.657: [CMS I suspect this problem has something to do with the last line in the log (I've added some "...." in order to skip some lines that were not interesting). The fact that the server stayed in the hung state for 2 hours (probably trying to GC and compact the old generation) seems quite strange to me. Also, the gc log stops suddenly with that message and nothing else gets printed any more, probably because the VM Thread gets into some sort of infinite loop (or something that takes 2+ hours).

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jQuery lava-lamp-like effect bouncing all over the place!

- by Nathan Loding

I followed the tutorial found here and added my own flare to it: tutorial What I was looking to accomplish was to put a specific image on the left and right side of the list item. So instead of just the generic <li id="blob"></li> created in the tutorial, I did <li id="blob"><div class="blob-wrap"><div class="leftimage"></div><div class="rightimage"></div></li> to accomplish the particular effect I wanted. It works beautifully ... except that the image attempts to bounce back the "currentPageItem" if I leave the mouse hovering over one of the list items. Here's a JS Bin example: http://jsbin.com/odome What do I need to do to fix it? jQuery is firing the "hoverOut" function (or whatever you want to call it). But why?

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Simple Perl script help required.

- by Umar Siddique

I'm looking to create a perl script that I will run on a JavaScript file to automatically change ( ' ) that breaks the script. Example: file.js document.writeln('» <a href="/LINK1" TARGET="_blank">Lorem ipsum lorem 1</a><br>'); document.writeln('» <a href="/LINK2" TARGET="_blank">Lorem ipsum lor'em x em 2</a><br>'); document.writeln('» <a href="/LINK3" TARGET="_blank">Lorem ipsum lorem 3</a><br>'); In 2nd line " Lorem ipsum lor'em x em 2 " contains a single quote which will be removed by script. Rest of the single quotes will be there like " document.writeln(' "

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jQuery :contains selector to search for multiple strings

- by Stefan

Assuming i have: <li id="1">Mary</li> <li id="2">John, Mary, Dave</li> <li id="3">John, Dave, Mary</li> <li id="4">John</li> If i need to find all <li> Elements which contain "John" and "Mary", how would i construct the jQuery? A search for a single string seems easy: $('li:contains("John")').text() I am looking for something like the following pseudo code: $('li:contains("John")' && 'li:contains("Mary")').text() Thanks!

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xsl - multiple xsl:if with the same condition

- by mickthomposn

Newbie question on xslt. I've multiple xsl:if checks like <xsl:if test="node/node1"> ...</xsl:if> ... <xsl:if test="node/node1"> ...</xsl:if> ... <xsl:if test="node/node1"> ... </xsl:if> Is there a way to parameterize the test condition to make the code more readable and easy to maintain? Maybe with a variable or something like <xsl:variable name="node1Present" select="true()"/> <xsl:if test="$node1Present"> ... </xsl:if> I don't understand how to construct the variable to reflect the 'test a node exist' (test="node/node1")

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IE Specific JavaScript

- by Banderdash

This feels like a stupid question, or one that could be answered with a little trial and error and some Googleing--but I assure you I have tried both and several ideas and am not getting the results I'm after. Here are my JS includes for a site:  <script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script> <script type="text/javascript" src="js/accordian.js"></script>  I'm simply trying to deliver the ie-accordian.js to IE 7 and accordian.js to all other browsers. Just not having any luck keeping IE 7 from using accordian.js as opposed to the one created especially for it. Any thoughts?

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DataMapper is only returning the last part of this query

- by Josh K

So I'm using the following: $r = new Record(); $r->select('ip, count(*) as ipcount'); $r->group_by('ip'); $r->order_by('ipcount', 'desc'); $r->limit(5); $r->get(); foreach($r->all as $record) { echo($record->ip." "); echo($record->ipcount." <br />"); } And I only get the last (fifth) record echo'ed out and no ipcount echoed. Is there a different way to go around this? I'm working on learning DataMapper (hence the questions) and need to figure some of this out. I haven't quite wrapped my head around the whole ORM thing.

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Binding a Viewbox to a Canvas

- by Bjarne

I'm trying to bind a Viewbox to Canvas that is created dynamically like so: <ListBox.ItemTemplate> <DataTemplate> <DockPanel> <Viewbox> <ContentPresenter Content="{Binding Canvas}"/> </Viewbox> </DockPanel> </DataTemplate> </ListBox.ItemTemplate> This works fine as long as the Canvas doesn't have any children, but as soon at the Canvas has children it's not shown. What am I missing here?

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Python: Split by 1 or more occurrences of a delimiter

- by Adam Matan

Hi, I have a formatted string from a log file, which looks like: >>> a="test result" That is, the test and the result are split by some spaces - it was probably created using formatted string which gave test some constant spacing. Simple splitting won't do the trick: >>> a.split(" ") ['test', '', '', '', ... '', '', '', '', '', '', '', '', '', '', '', 'result'] split(DELIMITER, COUNT) cleared some unnecessary values: >>> a.split(" ",1) ['test', ' result'] This helped - but of course, I really need: ['test', 'result'] I can use split() followed by map + strip(), but I wondered if there is a more Pythonic way to do it. Thanks, Adam

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Displaying the selected item differently in ComboBox

- by David Brunelle

I have a combo box in which I set up an ItemTemplate that looks something like this: <ComboBox.ItemTemplate> <DataTemplate> <StackPanel Orientation="Horizontal"> <TextBlock Text="{Binding Piece.NoPiece}" Width="50" /> <TextBlock Text="{Binding Piece.Description}" Width="170" /> <TextBlock Text="{Binding Piece.Categorie.NomCategorie}" /> </StackPanel> </DataTemplate> </ComboBox.ItemTemplate> As you can see, I got three columns that let the user see different piece of information. However, I would like the selected item in the combo to display only the second column. In other word, is there a way to have an ItemTemplate that displays items in a different manner when you scroll down versus when it's closed and you only see the selection?

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How to Stich to Image objects in Java

- by Imran

Hi, I have a scenario in which i`m getting a number of tiles (e.g.12) from my mapping server. Now for buffering and offline functions I need to join them all back again so that we have to deal with 1 single image object instead of 12. I ve tried to do it without JAI my code is below. package imagemerge; import java.awt.*; import java.awt.image.*; import java.awt.event.*; public class ImageSticher extends WindowAdapter { Image tile1; Image tile2; Image result; ColorModel colorModel; int width,height,widthr,heightr; //int t1,t2; int t12[]; public ImageSticher() { } public ImageSticher (Image img1,Image img2,int w,int h) { tile1=img1; tile2=img2; width=w; height=h; colorModel=ColorModel.getRGBdefault(); } public Image horizontalStich() throws Exception { widthr=width*2; heightr=height; t12=new int[widthr * heightr]; int t1[]=new int[width*height]; PixelGrabber p1 =new PixelGrabber(tile1, 0, 0, width, height, t1, 0, width); p1.grabPixels(); int t2[]=new int[width*height]; PixelGrabber p2 =new PixelGrabber(tile2, 0, 0, width, height, t1, 0, width); p2.grabPixels(); int y, x, rp, rpi; int red1, red2, redr; int green1, green2, greenr; int blue1, blue2, bluer; int alpha1, alpha2, alphar; for(y=0;y<heightr;y++) { for(x=0;x<widthr;x++) { //System.out.println(x); rpi=y*widthr+x; // index of resulting pixel; rp=0; //initializing resulting pixel System.out.println(rpi); if(x<(widthr/2)) // x is less than width , copy first tile { //System.out.println("tile1="+x); blue1 = t1[rpi] & 0x00ff; // ERROR occurs here green1=(t1[rpi] >> 8) & 0x00ff; red1=(t1[rpi] >> 16) & 0x00ff; alpha1 = (t1[rpi] >> 24) & 0x00ff; redr = (int)(red1 * 1.0); // copying red band pixel into redresult,,,,1.0 is the alpha valye redr = (redr < 0)?(0):((redr>255)?(255):(redr)); greenr = (int)(green1 * 1.0); // redr = (int)(red1 * 1.0); // greenr = (greenr < 0)?(0):((greenr>255)?(255):(greenr)); bluer = (int)(blue1 * 1.0); bluer = (bluer < 0)?(0):((bluer>255)?(255):(bluer)); alphar = 255; //resulting pixel computed rp = (((((alphar << 8) + (redr & 0x0ff)) << 8) + (greenr & 0x0ff)) << 8) + (bluer & 0x0ff); } else // index is ahead of half way...copy second tile { blue2 = t2[rpi] & 0x00ff; // blue band bit of first tile green2=(t2[rpi] >> 8) & 0x00ff; red2=(t2[rpi] >> 16) & 0x00ff; alpha2 = (t2[rpi] >> 24) & 0x00ff; redr = (int)(red2 * 1.0); // copying red band pixel into redresult,,,,1.0 is the alpha valye redr = (redr < 0)?(0):((redr>255)?(255):(redr)); greenr = (int)(green2 * 1.0); // redr = (int)(red2 * 1.0); // greenr = (greenr < 0)?(0):((greenr>255)?(255):(greenr)); bluer = (int)(blue2 * 1.0); bluer = (bluer < 0)?(0):((bluer>255)?(255):(bluer)); alphar = 255; //resulting pixel computed rp = (((((alphar << 8) + (redr & 0x0ff)) << 8) + (greenr & 0x0ff)) << 8) + (bluer & 0x0ff); } t12[rpi] = rp; // copying resulting pixel in the result int array which will be converted to image } } MemoryImageSource mis; if (t12!=null) { mis = new MemoryImageSource(widthr, heightr, colorModel, t12, 0, widthr); result = Toolkit.getDefaultToolkit().createImage(mis); return result; } return null; } } now to check the my theory Im trying to join or stich two tiles horizontaly but im getting the error : java.lang.ArrayIndexOutOfBoundsException: 90000 at imagemerge.ImageSticher.horizontalStich(ImageSticher.java:69) at imageStream.ImageStream.getImage(ImageStream.java:75) at imageStream.ImageStream.main(ImageStream.java:28) is there some kind of limitation because when stiching two images of 300 x 300 horizontally it means the resulting image will be 600 x 300 ... that would make 180000 index size but its giving error at 90000, what am I doing wrong here

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WPF RichTextBox with no width set

- by Mick

I have the following XAML code: <Window x:Class="RichText_Wrapping.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1"> <Grid> <RichTextBox Height="100" Margin="2" Name="richTextBox1"> <FlowDocument> <Paragraph> This is a RichTextBox - if you don't specify a width, the text appears in a single column </Paragraph> </FlowDocument> </RichTextBox> </Grid> ... If you create this window in XAML, you can see that when you don't specify a width for the window, it wraps the text in a single column, one letter at a time. Is there something I'm missing? If it's a known deficiency in the control, is there any workaround? Thanks, Michael

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DataTemplate, Style, Triggers

- by plotnick

Could you guys help me? I have a with custom and in it: <ListBox> <ListBox.ItemTemplate> <DataTemplate> <Border BorderBrush="Black" BorderThickness="2" CornerRadius="5"> <Image Source="{Binding Picture}" /> </Border> </DataTemplate> </ListBox.ItemTemplate> </ListBox> Now when I'm choosing the ListBoxItem it gets ugly with blue colored row selection. I'd like to change it. I want to color only border's background and nothing else. Also I want to change OnMouseOver behavior. I've tried trough triggers, but ContentPresenter doesn't have Background property. help me pls.

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Parsing XML feed into Ruby object using nokogiri?

- by Galen King

Hi all, I am pretty green with coding in Ruby but am trying to pull an XML feed into a Ruby object as follows (ignore the ugly code please): <% doc = Nokogiri::XML(open("http://api.workflowmax.com/job.api/current?apiKey=#{@feed.service.api_key}&accountKey=#{@feed.service.account_key}")) %> <% doc.xpath('//Jobs/Job').each do |node| %> <h2><%= node['name'].text %></h2> <p><%= node['description'].text %></p> <% end %> Basically I want to iterate through each Job and output the name, description etc. What am I missing? Many thanks, Galen

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