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  • Scheme open source projects?

    - by Ben
    Hi I'm learning scheme and was wondering if there are any active open-source projects I might be able to get involved in? I'm nearing the end of SICP and although this has good complex examples no textbook code compares to real-world applications. eg testing code / benchmarking / revision control styles / sheer size and scope etc. Hence my curiousity at seeing a project in the wild. I tried searching google code but only found projects that are interpreters that implement RSR5/6. Perhaps there are not many projects out there and I should consider scala?! Advice or even pointers to specific projects appreciated.

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  • How to research unmanaged memory leaks in .NET?

    - by Brandon
    I have a WCF service running over MSMQ. Memory gradually increases over time, indicating that there is some sort of memory leak. I ran the service locally and monitored some counters using PerfMon. Total CLR memory managed heap bytes remains relatively constant, while the process' private bytes increases over time. This leads me to believe that there is some sort of unmanaged memory leak. Assuming that unmanaged memory leak is the issue, how do I address the issue? Are there any tools I could use to give me hints as to what is causing the unmanaged memory leak? Also, all my service is doing is reading from the transactional queue and writing to a database, all as part of a DTC transaction (handled under the hood by requiring a transaction on the service contract). I am not doing anything explicitly with COM or DllImports. Thanks in advance!

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  • Informix - Fetching Records from a table

    - by Pradeep
    Consider the below table Col1 Col2 Col3 123 ABC 20/5/2010 123 CDS 21/5/2010 123 VDS 22/5/2010 123 ABC 23/5/2010 123 VDS 24/5/2010 123 CDS 25/5/2010 123 ABC 26/5/2010 I need to fetch the first occurrence of CDS and calculate the time diff between the next row. Similarly I need to find out the next occurrence of CDS and calculate the time diff with the next row. This has to go on until there are no occurrences of CDS left in the table. Will be grateful if someone can help on this!!

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  • Comapring pitches with digital audio

    - by user2250569
    I work on application which will compare musical notes with digital audio. My first idea was analyzes wav file (or sound in real-time) with some polyphonic pitch algorithms and gets notes and chords from this file and subsequently compared with notes in dataset. I went through a lot of pages and it seems to be a lot of hard work because existing implementations and algorithms are mainly/only focus on monophonic sound. Now, I got the idea to do this in the opposite way. In dataset I have for example note: A4 or better example chord: A4 B4 H4. And my idea is make some wave (or whatever I don't know what) from this note or chord and then compared with piece of digital audio. Is this good idea? Is it better/harder solution? If yes can you recommend me how to do it?

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  • dojo TimeTextBox don't listen to on blur event

    - by kawtousse
    Hi everyone, I want to add an on blur event to a dojo timetextbox but the event never been runned so the declaration of the timetextbox is like this: <label>End</label><input id="endp" name="endp" onBlur="calculateTimeSpent2(startp,endp,output);" /> the javascript function is like this: function calculateTimeSpent2(startp,endp,outputp) { var tmp0=document.getElementById('startp').value.split(':'); var tmp1=document.getElementById('endp').value.split(':'); if (tmp0[0]!='' && tmp1[0]!='') { var val1= findtime(tmp0[0],tmp0[1],tmp1[0],tmp1[1]); var tmp=val1.split(':'); if (tmp[0].indexOf('-')==-1) document.getElementById('outputp').value=val1; else { alert ("Start Time must be lower than End Time "); document.getElementById('endp').focus(); } } } I don't understand why dojo didn't execute the event correctly while loosing the focus. I tried to put the type=text but it does'nt work. Thanks for help.

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  • Commiting broken code to the repository for the purpose of backing it up

    - by Tim Merrifield
    I was just talking to another developer (more senior than I) and trying to convince him that we should implement continuous integration via Cruise Control. He told me that this will not work because he commits code that does not compile to the repository all the time for the purposes of backing it up. And that automated builds notifying us of failures would be just noise. Committing garbage to the repo sounds bad to me. But I was at a loss of words and didn't know what to say. What is the alternative? What's the best practice for backing up your code on another machine without adding a bunch of pointless revisions? BTW, our version control system is SVN and that probably won't change any time soon.

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  • Forking Public GitHub Code that is also Sold as a Complied App

    - by Ryan Castillo
    I found a public repo on GitHub that I would like to play around with. I can see myself potentially spending a lot of time writing tests for it and expanding its functionality. The code is also being sold as an app. I have no problem with this because I admire the owner's practice of sharing his source and also providing the convenience of paying for the app for users who don't want to mess with compiling it. If I was to spend time with this code as a separate fork what would prevent the owner from merging it with his master branch? Is it ethical for him to still profit off of my added functionality? Should a line be drawn somewhere?

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  • ANY material writen in/for DELPHI around the graphics topic?

    - by José Eduardo
    Does anyone knows ANY material writen in/for DELPHI around the graphics topic? Planning to build a software for medical imaging processing . Thinking in 3D UI to absorve the power of nvidias GTX graphics card, and some real-time 2D processing integrated with high-end scanners. Please dont take this as a "rant" but, we have zillions of C++ books writen about that kind of topic and nothing for pascal/delphi. If you have some experience could you comment about that? Is it better to learn c++, to have access to that material? Can i go with delphi? I have experience with delphi, but none with graphics... And i have a deadline... Thanks.

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  • Httpd Process High memory usage and slow page loads

    - by Abs
    Hello all, I am running wampserver on my windows vista machine. I have been doing this for a long time and it has been working great. I have completed loads of projects with this setup. However, today, without me changing anything (no configuration etc) only PHP code changes, I find that every time I load pages of my site (those with user sessions or access the database) are really slow to load - Over 30 seconds, they use to take 1 or 2 seconds. When I have a look at the task manager, I can see on page loads the httpd process jumps from 10mb to 30mb, 90mb, 120mb, 250mb and then back down again. I have tested previous php code projects and they seem to all be slow as well! What is going on? Thanks all for any help on this confusion issue!

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  • How to open an html file using the default file handler and to give the window a name (i.e. target)?

    - by paul
    I am writing a warm-up script for a SharePoint server. The idea is to call stsadm and then open an html file containing iframes which touch all the key web pages in my portal. So far so good. The problem is that each time the script is run, a new browser window is opened and I end up with a screen full of browsers. The first idea was to close the browser after 10 minutes or so. This would be easy to do except that Javascript is disabled when an html file is opened from the file system. I then thought I might be able to open the file and set it in a named window (target) which would be reused each time the script runs but I haven't found any way to do this. Does anyone have any ideas? Either to force JS to run or to set the window name or another solution? Thanks.

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  • who uses a TCP port?

    - by dijxtra
    One of gen_servers in my app call gen_tcp:listen(Port, [{active, true}]). First time I run unit test, it returns {ok, Socket}, but second time I run the same unit test, it returns an {error, eaddrinuse}, but lsof -i TCP returns nothing. Also, when the same unit_test is run twice on another machine (WinXP), it works as expected (that is, returns {ok, Socket} both times). Therefore, my gen_server obviously releases the port, but Erlang somehow doesn't know that. So, how can I figure out who does Erlang think uses this address?

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  • Selected number of records from database in DB2.

    - by Abhi
    Hi All, I have to fetch only 50 records at a time from database(DB2), for this I have been usig Row_Number but now the persons are telling that this Row_Number is not stable and has bugs in it so now I have to write a different querry for the same as I have to fetch only 50 records at a time. so please can any body help me out for the same. Thanks in advance. The Query which I have been using is SELECT PLC.* FROM ( SELECT ROW_NUMBER() OVER (ORDER BY PRDLN_CTLG_OID) AS Row, PRDLN_CTLG_OID, PRODUCT_LINE_OID AS PRODUCT_LINE_OID, RTRIM(CATALOG_ID) AS CATALOG_ID, FROM PROD_LINE_CATALOG WHERE PRODUCT_LINE_OID=:productLineOID AND ACTV_IND = 1 ORDER BY CATALOG_ID) PLC WHERE Row >= :startIndex AND Row <= :endIndex ORDER BY PLC.CATALOG_ID DESC WITH UR

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  • Rails Active Record find(:all, :order => ) issue.

    - by CodingWithoutComments
    I seem to be unable to use :order_by for more than one column at a time. For example, I have a "Show" model with date and attending columns. If I run the following code: @shows = Show.find(:all, :order => "date") I get the following results: [#<Show id: 7, date: "2009-04-18", attending: 2>, #<Show id: 1, date: "2009-04-18", attending: 78>, #<Show id: 2, date: "2009-04-19", attending: 91>, #<Show id: 3, date: "2009-04-20", attending: 16>, #<Show id: 4, date: "2009-04-21", attending: 136>] If I run the following code: @shows = Show.find(:all, :order => "attending DESC") [#<Show id: 4, date: "2009-04-21", attending: 136>, #<Show id: 2, date: "2009-04-19", attending: 91>, #<Show id: 1, date: "2009-04-18", attending: 78>, #<Show id: 3, date: "2009-04-20", attending: 16>, #<Show id: 7, date: "2009-04-18", attending: 2>] But, if I run: @shows = Show.find(:all, :order => "date, attending DESC") OR @shows = Show.find(:all, :order => "date, attending ASC") OR @shows = Show.find(:all, :order => "date ASC, attending DESC") I get the same results as only sorting by date: [#<Show id: 7, date: "2009-04-18", attending: 2>, #<Show id: 1, date: "2009-04-18", attending: 78>, #<Show id: 2, date: "2009-04-19", attending: 91>, #<Show id: 3, date: "2009-04-20", attending: 16>, #<Show id: 4, date: "2009-04-21", attending: 136>] Where as, I want to get these results: [#<Show id: 1, date: "2009-04-18", attending: 78>, #<Show id: 7, date: "2009-04-18", attending: 2>, #<Show id: 2, date: "2009-04-19", attending: 91>, #<Show id: 3, date: "2009-04-20", attending: 16>, #<Show id: 4, date: "2009-04-21", attending: 136>] This is the query being generated from the logs: [4;35;1mUser Load (0.6ms)[0m [0mSELECT * FROM "users" WHERE ("users"."id" = 1) LIMIT 1[0m [4;36;1mShow Load (3.0ms)[0m [0;1mSELECT * FROM "shows" ORDER BY date ASC, attending DESC[0m [4;35;1mUser Load (0.6ms)[0m [0mSELECT * FROM "users" WHERE ("users"."id" = 1) [0m Finally, here is my model: create_table "shows", :force => true do |t| t.string "headliner" t.string "openers" t.string "venue" t.date "date" t.text "description" t.datetime "created_at" t.datetime "updated_at" t.decimal "price" t.time "showtime" t.integer "attending", :default => 0 t.string "time" end What am I missing? What am I doing wrong? UPDATE: Thanks for all your help, but it seems that all of you were stumped as much as I was. What solved the problem was actually switching databases. I switched from the default sqlite3 to mysql.

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  • How to enable `geom_text` to recognize `aes` in QPLOT (R programming)

    - by neversaint
    I have a data that looks like this ensg mirna_hgc time value perc id ENSG00000211521 MIR665 x 89 2.07612456747405 1 ENSG00000207787 MIR98 x 73 1.73010380622837 2 ... ENSG00000207827 MIR30A y 99 21.4532871972318 288 ENSG00000207757 MIR93 y 94 1.73010380622837 289 What I'm trying to do is to create a facet plot with label on top of it. The label can be easily called from the perc column. Using this code: dat.m <- read.delim("http://dpaste.com/1271039/plain/",header=TRUE,sep=" ") qplot(value, data=dat.m,facets=time~.,binwidth=1,main="")+ xlab("Value")+ ylab("Count")+ theme(legend.position="none")+ stat_bin(aes(value,label=sprintf("%.01f",perc)),geom="text") But it gave me this error: Error: geom_text requires the following missing aesthetics: label What I'm trying to do is to generate this plot:

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  • Threaded application sleeps with other application

    - by DeeD
    I have a weird problem with my threaded software. I start 2 instances of the software. Each instance has 2 threads, one thread creates a socket to use, and the other one is uses the socket for communication. When one of the threads in one instance calls sleep(3), the other threads in the the other instance sleeps too. And the weirdest thing is that when I rebooted the computer, it works the first time, but after trying a second time, it sleeps like described. How is this possible? Is it using some shared resource?

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  • What algorithm would you use to code a parrot?

    - by Phil H
    A parrot learns the most commonly uttered words and phrases in its vicinity so it can repeat them at inappropriate moments. So how would you create a software version? Assuming it has access to a microphone and can record sound at will, how would you code it without requiring infinite resources? The best I can imagine is to divide the stream using silences in the sound, and then use some pattern recognition to encode each one as a list of tokens, storing new ones as you meet them. Hashing the token sequences and counting occurrences in a database, you could build up a picture of the most frequently uttered phrases. But given the huge variety in phrases, how do you prevent this just becoming a huge list? And the sheer number of pairs to match would surely generate lot of false positives from the combinatorial nature of matching. Would you use a neural net, since that's how a real parrot manages it? Or is there another, cleverer way of matching large-scale patterns in analogue data?

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  • Recommended place for pre-translated Zend Framework resources

    - by Exception e
    Since zf 1.10 Zend Framework ships with pre-translated validation messages. They are outside the library path. The manual illustrates how to load these in your bootstrap. $translator = new Zend_Translate( 'array', '/resources/languages', $language, array('scan' => Zend_Locale::LOCALE_DIRECTORY) ); Zend_Validate_Abstract::setDefaultTranslator($translator); I am inclined to think that these resources are specific to the zf-version; validators could change over time. If i copy the resources to my application tree I need to perform additional maintenance each time I upgrade to a newer version. What is best practice? Is there a ZF convention already?

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  • Strange problem installing a setup that I have just created.

    - by robUK
    Hello, I have both VS 2005 and 2008 installed. Just today I created a setup project in 2005 and I got this error when I tried to installed it. "The folder path 'http://sharingcentre.info' contains an invalid character." So I decided to create a simple project and added a new setup in 2005 and got the same problem. I then converted the project to 2008 and added another new setup. The same problem happened again. However, a previous setup project I created before work ok. I can install my application. Its only from today I cannot install any of my new setup projects. Using either 2005 and 2008. Has anyone else had this same problem. Searching google doesn't give me any real responses, I give the error message is too vague. many thanks for any suggestions,

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  • databinding to self without code

    - by jcollum
    I'm building a UserControl in WPF. The control has two properties, Title and Description, that I'd like to bind to two textblocks. Seems real straightforward, and I got it working, but I'm curious about something. To get it to work I had to add this code: void CommandBlock_Loaded(object sender, RoutedEventArgs e) { this.DataContext = this; } My bindings look like this: <TextBlock Text="{Binding Title}" Width="100" ... /> <TextBlock Text="{Binding Description}" Width="100" ... /> What I'm wondering is how come I couldn't get it to work without the this.DataContext = this; and instead use DataContext="{Binding RelativeSource={RelativeSource Self}}" (in the UserControl element of the markup)? I'm sure I'm missing something about DataContexts but don't know what.

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  • Self-contained python installation with executable tools included (pip, orbited, etc)

    - by Tristan
    I'm trying deploy a Python application on Windows as a folder that includes a full python 2.6 folder. I don't need/want a fancy solution like py2exe, I'm just trying to automate deployment of a web application. So long as I include python26.dll and set the PYTHONHOME correctly, things seem to work if I just include the Python26 folder in its entirety. However a number of the Python26/Script files don't work. For instance, pip.exe, orbited.exe, and morbid.exe all do nothing (complete with no output) when I try to run them on a system that doesn't have a real Python26 installation. I've run out of ideas. Suggestions?

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  • Unassigned value error asp.net C#

    - by slash shogdhe
    if variable is not assigned,then it takes the default value at run time. for example int A1; if i will check the value of A1 at runtime it will be 0; then why at compile time it throws a error of unassigned value; why clr dont use to alot the default value at runtime; int A1; int B1 = A1+10; it shud be 11 as the default value of A1 is 0; there project property where i can check for "assignn defalut values for unassigned variable"; can any one tell me where i can find it;

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  • bandwidth throttling C linux

    - by bob moch
    hi im currently creating a function to create a sleep time i can pause between packets for my port scanner im creating for personal/educational use for my home network. what im currently doing is opening /proc/net/dev and reading the 9th set of digits for the eth0 interface to find out the current packets being set and then reading it again and doing some math to figure out a delay to sleep between sending a packet to a port to identify it and fingerprint it. my problem is that no matter what throttle % i use it always seems to send the same rate of packets. i think its mainly my way of mathematically creating my sleep delay. edit:: dont mind the function declaration and the struct stuff all im doing is spawning this function in a thread and passing a pointer to a struct to the function, recreating the struct locally and then freeing the passed structs memory. void *bandwidthmonitor_cmd(void *param) { char cmdline[1024], *bytedata[19]; int i = 0, ii = 0; long long prevbytes = 0, currentbytes = 0, elapsedbytes = 0, byteusage = 0, maxthrottle = 0; command_struct bandwidth = *((command_struct *)param); free(param); //printf("speed: %d\n throttle: %d\n\n", UPLOAD_SPEED, bandwidth.throttle); maxthrottle = UPLOAD_SPEED * bandwidth.throttle / 100; //printf("max throttle:%lld\n", maxthrottle); FILE *f = fopen("/proc/net/dev", "r"); if(f != NULL) { while(1) { while(fgets(cmdline, sizeof(cmdline), f) != NULL) { cmdline[strlen(cmdline)] = '\0'; if(strncmp(cmdline, " eth0", 6) == 0) { bytedata[0] = strtok(cmdline, " "); while(bytedata[i] != NULL) { i++; bytedata[i] = strtok(NULL, " "); } bytedata[i + 1] = '\0'; currentbytes = atoi(bytedata[9]); } } i = 0; rewind(f); elapsedbytes = currentbytes - prevbytes; prevbytes = currentbytes; byteusage = 8 * (elapsedbytes / 1024); //printf("usage:%lld\n",byteusage); if(ii & 0x40) { SLEEP += (maxthrottle - byteusage) * -1.1;//-2.5; if(SLEEP < 0){ SLEEP = 0; } //printf("sleep:%d\n", SLEEP); } usleep(25000); ii++; } } return NULL; } SLEEP and UPLOAD_SPEED are global variables and UPLOAD_SPEED is in kb/s and generated via a speedtest function that gets the upload speed of my computer. this function is running inside a POSIX thread updating SLEEP which my threads doing the socket work grab to sleep by after every packet. as testing instead of only doing the ports i want to check i make it do all the ports over and over again so i can run dstat on a machine to check bandwidth and no matter what bandwidth.throttle is set to it always seems to generate the same amount of bandwidth to the dstat machine. the way i calculate how much i "should" throttle by is by finding the maximum throttle speed which is defined as maxthrottle = upload_speed * throttle / 100; for example if my upload speed was 1000kb/s and my throttle was 90 (90%) my max throttle would be 900kb/s from there it would find the current bytes sent from /proc/net/dev and then find my sleep time via incrementing or decrementing it via sleep += (maxthrottle - bytesysed) * -1.1; this should in theory increase or decrease the sleep time based on how many bytes used there are. the if(ii & 0x40) statement is just for some moderation control. it makes it so it only sets sleep to a new time every 30-40 iterations. final notes: the main problem is that the sleep timer does not seem to modify the speed of packets being set. or maybe its just my implementation because on a freshly restarted machine where /proc/net/dev has low numbers of bytes sent it seems to raise the sleep timer accordingly on my 60kb/s upload machine (ex if i set the throttle to 2 it will incline the sleep timer until network bandwidth out reaches the max bandwidth threshold, but when i try running it on a server which as been online forever it doesnt seem to work as nicely if at all. if anyone can suggest a new method of monitoring the network to adjust a sleep delay then let me know or if anyone sees a flaw in my code. thank you.

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  • Address of array vs. address of array[0] - C language

    - by user324994
    My question is why does the address of an array differ from the address of its first position? I'm trying to write my own malloc, but to start out I'm just allocating a chunk of memory and playing around with the addresses. My code looks roughly like this: #define BUFF_SIZE 1024 static char *mallocbuff; int main(){ mallocbuff = malloc(BUFF_SIZE); printf("The address of mallocbuff is %d\n", &mallocbuff); printf("The address of mallocbuff[0] is %d\n", &mallocbuff[0]); } &mallocbuff is the same address every time I run it. &mallocbuff[0] is some random address every time. I was expecting the addresses to match each other. Can anyone explain why this isn't the case?

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