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  • Nested generator functions in python

    - by Yuval A
    Consider a tuple v = (a,b,c) and a generator function generate(x) which receives an item from the tuple and generates several options for each item. What is the pythonic way of generating a set of all the possible combinations of the result of generate(x) on each item in the tuple? I could do this: v = (a,b,c) for d in generate(v[0]): for e in generate(v[1]): for f in generate(v[2]): print d,e,f but that's just ugly, plus I need a generic solution.

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  • To log in stored procedures?

    - by hgulyan
    If you have a long running SP, do you log somehow it's actions or just wait for this message? "Command(s) completed successfully." I assume, that there can be plenty solutions on this subject, but is there any best practice - a simple solution that is frequently used?

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  • Where is the default language data stored in OS 10.6

    - by George Baugh
    From a shell in 10.4 or 10.5, I was able to do this: /usr/bin/defaults read NSGlobalDomain AppleLanguages To get the list of the language preference for that particular machine. This was done so that I could restore it back to that list after changing it with the 'defaults write' command to something else (in order to help automate l10n testing). Now, along comes OS 10.6, and AppleLanguages is nowhere in any of our defaults domains. I know that I can alter it for each running application by altering their specific property lists...but at the cost of more complexity. Also, some of the apps I have under test here are installer packages...and It's a real pain to change stuff (like the .plist I'd have to change here) in those without being somewhat destructive; that's why I chose to do it globally in the first place. Anyways, it'd be great if I could find where they stashed it now...or if they deprecated it (like a zillion other things in OS 10.6) completely.

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  • Random Complete System Unresponsiveness Running Mathematical Functions

    - by Computer Guru
    I have a program that loads a file (anywhere from 10MB to 5GB) a chunk at a time (ReadFile), and for each chunk performs a set of mathematical operations (basically calculates the hash). After calculating the hash, it stores info about the chunk in an STL map (basically <chunkID, hash>) and then writes the chunk itself to another file (WriteFile). That's all it does. This program will cause certain PCs to choke and die. The mouse begins to stutter, the task manager takes 2 min to show, ctrl+alt+del is unresponsive, running programs are slow.... the works. I've done literally everything I can think of to optimize the program, and have triple-checked all objects. What I've done: Tried different (less intensive) hashing algorithms. Switched all allocations to nedmalloc instead of the default new operator Switched from stl::map to unordered_set, found the performance to still be abysmal, so I switched again to Google's dense_hash_map. Converted all objects to store pointers to objects instead of the objects themselves. Caching all Read and Write operations. Instead of reading a 16k chunk of the file and performing the math on it, I read 4MB into a buffer and read 16k chunks from there instead. Same for all write operations - they are coalesced into 4MB blocks before being written to disk. Run extensive profiling with Visual Studio 2010, AMD Code Analyst, and perfmon. Set the thread priority to THREAD_MODE_BACKGROUND_BEGIN Set the thread priority to THREAD_PRIORITY_IDLE Added a Sleep(100) call after every loop. Even after all this, the application still results in a system-wide hang on certain machines under certain circumstances. Perfmon and Process Explorer show minimal CPU usage (with the sleep), no constant reads/writes from disk, few hard pagefaults (and only ~30k pagefaults in the lifetime of the application on a 5GB input file), little virtual memory (never more than 150MB), no leaked handles, no memory leaks. The machines I've tested it on run Windows XP - Windows 7, x86 and x64 versions included. None have less than 2GB RAM, though the problem is always exacerbated under lower memory conditions. I'm at a loss as to what to do next. I don't know what's causing it - I'm torn between CPU or Memory as the culprit. CPU because without the sleep and under different thread priorities the system performances changes noticeably. Memory because there's a huge difference in how often the issue occurs when using unordered_set vs Google's dense_hash_map. What's really weird? Obviously, the NT kernel design is supposed to prevent this sort of behavior from ever occurring (a user-mode application driving the system to this sort of extreme poor performance!?)..... but when I compile the code and run it on OS X or Linux (it's fairly standard C++ throughout) it performs excellently even on poor machines with little RAM and weaker CPUs. What am I supposed to do next? How do I know what the hell it is that Windows is doing behind the scenes that's killing system performance, when all the indicators are that the application itself isn't doing anything extreme? Any advice would be most welcome.

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  • PL/SQL Sum by hour

    - by Steve
    Hi, I have some data with start and stop date that I need to sum. I am not sure how to code for it. Here are is the data I have to use: STARTTIME,STOPTIME,EVENTCAPACITY 8/12/2009 1:15:00 PM,8/12/2009 1:59:59 PM,100 8/12/2009 2:00:00 PM,8/12/2009 2:29:59 PM,100 8/12/2009 2:30:00 PM,8/12/2009 2:59:59 PM,80 8/12/2009 3:00:00 PM,8/12/2009 3:59:59 PM,85 In this example I would need the sum from 1pm to 2pm, 2pm to 3pm and 3pm to 4pm Any suggestions are appreciated. Steve

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  • What is the scope of JS variables in anonymous functions

    - by smorhaim
    Why does this code returns $products empty? If I test for $products inside the function it does show data... but once it finishes I can't seem to get the data. var $products = new Array(); connection.query($sql, function(err, rows, fields) { if (err) throw err; for(i=0; i< rows.length; i++) { $products[rows[i].source_identifier] = "xyz"; } }); connection.end(); console.log($products); // Shows empty.

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  • Problem with Ruby script output being stored into a file

    - by nickf
    I have a Ruby script that outputs a heap of text. As an example: puts "line 1" puts "line 2" puts "line 3" # etc... (obviously, this isn't how my script works..) There's not a lot of data - perhaps about 8kb of character data in total. When I run the script on the command line, it works as expected: $ ./my-script.rb line 1 line 2 line 3 But, when I push it into a file, the output is truncated at exactly 4096 bytes: $ ./my-script.rb > output.txt What would cause it to stop at 4kb?

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  • Delphi Unicode String Type Stored Directly at its Address (or "Unicode ShortString")

    - by Andreas Rejbrand
    I want a string type that is Unicode and that stores the string directly at the adress of the variable, as is the case of the (Ansi-only) ShortString type. I mean, if I declare a S: ShortString and let S := 'My String', then, at @S, I will find the length of the string (as one byte, so the string cannot contain more than 255 characters) followed by the ANSI-encoded string itself. What I would like is a Unicode variant of this. That is, I want a string type such that, at @S, I will find a unsigned 32-bit integer (or a single byte would be enough, actually) containing the length of the string in bytes (or in characters, which is half the number of bytes) followed by the Unicode representation of the string. I have tried WideString, UnicodeString, and RawByteString, but they all appear only to store an adress at @S, and the actual string somewhere else (I guess this has do do with reference counting and such). Update: The most important reason for this is probably that it would be very problematic if sizeof(string) were variable. I suspect that there is no built-in type to use, and that I have to come up with my own way of storing text the way I want (which actually is fun). Am I right? Update I will, among other things, need to use these strings in packed records. I also need manually to read/write these strings to files/the heap. I could live with fixed-size strings, such as <= 128 characters, and I could redesign the problem so it will work with null-terminated strings. But PChar will not work, for sizeof(PChar) = 1 - it's merely an address. The approach I eventually settled for was to use a static array of bytes. I will post my implementation as a solution later today.

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  • Difference in F# and Clojure when calling redefined functions

    - by Michiel Borkent
    In F#: > let f x = x + 2;; val f : int -> int > let g x = f x;; val g : int -> int > g 10;; val it : int = 12 > let f x = x + 3;; val f : int -> int > g 10;; val it : int = 12 In Clojure: 1:1 user=> (defn f [x] (+ x 2)) #'user/f 1:2 user=> (defn g [x] (f x)) #'user/g 1:3 user=> (g 10) 12 1:4 user=> (defn f [x] (+ x 3)) #'user/f 1:5 user=> (g 10) 13 Note that in Clojure the most recent version of f gets called in the last line. In F# however still the old version of f is called. Why is this and how does this work?

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  • Python os module path functions

    - by broiyan
    From the documentation: os.path.realpath(path) Return the canonical path of the specified filename, eliminating any symbolic links encountered in the path (if they are supported by the operating system). When I invoke this with an extant file's name, I get the path to it: /home/myhome/myproject. When I invoke this with a 'nonsense.xxx' string argument, I still get a path to /home/myhome/myproject/nonsense.xxx. This is a little inconsistent because it looks like nonsense.xxx is taken to be a directory not a file (though it is neither: it does not exist). When I invoke this with a null string file name, I still get a path to /home/myhome/myproject. How can I account for this behaviour when the documentation says so little about realpath()? (I am using Python 2.5.) Edit: Somebody suggested a way to test if files exist. My concern is not to test if files exist. My concern is to account for behaviour.

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  • PHP: Strange behaviour while calling custom php functions

    - by baltusaj
    I am facing a strange behavior while coding in PHP with Flex. Let me explain the situation: I have two funcions lets say: populateTable() //puts some data in a table made with flex createXML() //creates an xml file which is used by Fusion Charts to create a chart Now, if i call populateTable() alone, the table gets populated with data but if i call it with createXML(), the table doesn't get populated but createXML() does it's work i.e. creates an xml file. Even if i run following code, only xml file gets generated but table remains empty whereas i called populateTable() before createXML(). Any idea what may be going wrong? MXML Part <mx:HTTPService id="userRequest" url="request.php" method="POST" resultFormat="e4x"> <mx:request xmlns=""> <getResult>send</getResult> </mx:request> and <mx:DataGrid id="dgUserRequest" dataProvider="{userRequest.lastResult.user}" x="28.5" y="36" width="525" height="250" > <mx:columns> <mx:DataGridColumn headerText="No." dataField="no" /> <mx:DataGridColumn headerText="Name" dataField="name"/> <mx:DataGridColumn headerText="Age" dataField="age"/> </mx:columns> PHP Part <?php //-------------------------------------------------------------------------- function initialize($username,$password,$database) //-------------------------------------------------------------------------- { # Connect to the database $link = mysql_connect("localhost", $username,$password); if (!$link) { die('Could not connected to the database : ' . mysql_error()); } # Select the database $db_selected = mysql_select_db($database, $link); if (!$db_selected) { die ('Could not select the DB : ' . mysql_error()); } // populateTable(); createXML(); # Close database connection } //-------------------------------------------------------------------------- populateTable() //-------------------------------------------------------------------------- { if($_POST['getResult'] == 'send') { $Result = mysql_query("SELECT * FROM session" ); $Return = "<Users>"; $no = 1; while ( $row = mysql_fetch_object( $Result ) ) { $Return .= "<user><no>".$no."</no><name>".$row->name."</name><age>".$row->age."</age><salary>". $row->salary."</salary></session>"; $no=$no+1; $Return .= "</Users>"; mysql_free_result( $Result ); print ($Return); } //-------------------------------------------------------------------------- createXML() //-------------------------------------------------------------------------- { $users=array ( "0"=>array("",0), "1"=>array("Obama",0), "2"=>array("Zardari",0), "3"=>array("Imran Khan",0), "4"=>array("Ahmadenijad",0) ); $selectedUsers=array(1,4); //this means only obama and ahmadenijad are selected and the xml file will contain info related to them only //Extracting salaries of selected users $size=count($users); for($i = 0; $i<$size; $i++) { //initialize temp which will calculate total throughput for each protocol separately $salary = 0; $result = mysql_query("SELECT salary FROM userInfo where name='$users[$selectedUsers[$i]][0]'"); $row = mysql_fetch_array($result)) $salary = $row['salary']; } $users[$selectedUsers[$i]][1]=$salary; } //creating XML string $chartContent = "<chart caption=\"Users Vs Salaries\" formatNumberScale=\"0\" pieSliceDepth=\"30\" startingAngle=\"125\">"; for($i=0;$i<$size;$i++) { $chartContent .= "<set label=\"".$users[$selectedUsers[$i]][0]."\" value=\"".$users[$selectedUsers[$i]][1]."\"/>"; } $chartContent .= "<styles>" . "<definition>" . "<style type=\"font\" name=\"CaptionFont\" size=\"16\" color=\"666666\"/>" . "<style type=\"font\" name=\"SubCaptionFont\" bold=\"0\"/>" . "</definition>" . "<application>" . "<apply toObject=\"caption\" styles=\"CaptionFont\"/>" . "<apply toObject=\"SubCaption\" styles=\"SubCaptionFont\"/>" . "</application>" . "</styles>" . "</chart>"; $file_handle = fopen('ChartData.xml','w'); fwrite($file_handle,$chartContent); fclose($file_handle); } initialize("root","","hiddenpeak"); ?>

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  • translate stored procedure - to Linq2SQL (count, max, group, orderby)

    - by Walter
    I've two tables (1:N) CREATE TABLE master (idMaster int identity (1,1) not null, TheName varchar( 100) null, constraint pk_master primary key(idMaster) clustered) and - CREATE TABLE lnk (idSlave int not null, idMaster int not null, constraint pk_lnk_master_slave(idSlave) primary key clustered) link between Master.idMaster and lnk.idMaster I've a SQL query: select max (master.idMaster) as idMaster, master.theName, count (lnk.idSlave) as freq from lnk inner join master ON lnk.idMaster = master.idMaster Group by master.theName order by freq desc, master.theName I need to translate this T-SQL query to a Linq-to-SQL statement, preferably in C#

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  • Sphinx - Python modules, classes and functions documentation

    - by user343934
    Hi everyone, I am trying to document my small project through sphinx which im recently trying to get familiar with. I read some tutorials and sphinx documentation but couldn't make it. Setup and configurations are ok! just have problems in using sphinx in a technical way. My table of content should look like this --- Overview .....Contents ----Configuration ....Contents ---- System Requirements .....Contents ---- How to use .....Contents ---- Modules ..... Index ......Display ----Help ......Content Moreover my focus is on Modules with docstrings. Details of Modules are Directory:- c:/wamp/www/project/ ----- Index.py >> Class HtmlTemplate: .... def header(): .... def body(): .... def form(): .... def header(): .... __init_main: ##inline function ----- display.py >> Class MainDisplay: .... def execute(): .... def display(): .... def tree(): .... __init_main: ##inline function My Documentation Directory:- c:/users/abc/Desktop/Documentation/doc/ --- _build --- _static --- _templates --- conf.py --- index.rst I have added Modules directory to the system environment and edited index.rst with following codes just to test Table of content. But i couldn't extract docstring directly Index.rst T-Alignment Documentation The documentation covers general overview of the application covering functionalities and requirements in details. To know how to use application its better to go through the documentation. .. _overview: Overview .. _System Requirement: System Requirement Seq-alignment tools can be used in varied systems base on whether all intermediary applications are available or not like in Windows, Mac, Linux and UNIX. But, it has been tested on the Windows working under a beta version. System Applications Server .. _Configuration:: Configuration Basic steps in configuration involves in following categories Environment variables Apache setting .. _Modules:: Modules How can i continue from here... Moreover, i am just a beginner to sphinx documentation tool I need your suggestions to brings my modules docstring to my documentation page Thanks

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  • How can you write a function that accepts multiple types?

    - by matthy
    I have a function that should work on int[] and on String[] now i have made the same function with a int parameter and an String parameter however if it has to go this way its a bit copy paste work and doesn't look very organized is there a way to solve this and put these 4 functions in 2? static public void print(String s) { System.out.println(s); } static public void print(int s) { System.out.println(s); } static public void printArray(String[] s) { for (int i=0; i<s.length; i++) print(s[i]); } static public void printArray(int[] s) { for (int i=0; i<s.length; i++) print(s[i]); } Thanks Matthy

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  • PL/SQL profiler missing data

    - by user289429
    We are using pl/sql profiler to collect metrics. We noticed that on one of the environment the plsql_profiler_runs table is populated with the total execution time but the finer details that gets collected in the table plsql_profiler_data is missing. Any idea why this would be happening? We do use dbms_profiler.flush_data() before stopping the profiler and have seen this work fine in another environment.

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  • Some help with basic Sound functions in actionscript 3

    - by danwoods
    Hello all. I'm working on a mp3 player and I'm super new at all things flash so there are lots of questions. Currently I'm getting stuck on the track change. My variable declaration look like this: var index:int = -1; var music:Sound = new Sound(new URLRequest("moe2008-05-24d02t02_vbr.mp3")); var sc:SoundChannel; var isPlaying:Boolean = false; and my change track function looks like this: function changeTrack(newTrack){ sc.stop(); isPlaying = false; music = new Sound(new URLRequest(newTrack)); sc = music.play(); isPlaying = true; index++; } Does anyone see any obvious errors??? Thanks

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  • FTS: Searching across multiple fields 'intelligently'

    - by Wild Thing
    Hi, I have a SP using FTS (Full Text Search). I want searches across multiple fields, 'intelligently' ranking results based on the weights I assign. Consider a search on a view fetching data from tables: Book, Author and Genre. Now, I want the searcher to be able to do: "Ludlum Fiction", "Robert Ludlum Bourne", "Bourne Ludlum", etc. Unfortunately, the only way I have been able to do that at present is this: http://pastebin.com/fdce11ff This is pretty bad, because I am manually breaking up the search string. I know I am doing this completely the wrong way, but can't figure out the right way to search across multiple fields in FTS. Can somebody help please?

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  • Separating Javascript functions

    - by msharma
    I am wondering how javascripts get included in a jsp - can we put any code which the jsp will recognize and not just javascript code only in the .js file? I have some common javascript code which needs to get executed on different pages, so I decided to place it in its own separate .js file and include it on all jsps which call that function. The js function now refers to a key from a properties file and some other non-javascript code: function openPrivacyStmntWindow(){ var url = <h:outputText escape="false" value="\"#{urls.url_privacyStatement}\";" /> newwindow=window.open(url,'Terms','height=600,width=800,left=300,top=100,scrollbars=1'); newwindow.focus(); return false; } This function worked just fine when it was included in the jsp itself. Now that I have separated it into its own file it doesnt, do I need to include the properties bundle in this file. The value="\"#{urls.url_privacyStatement}\";" is referring to a bundle called "urls" which has a key called "url_privacyStatement" Also in Line 1 var url = <h:outputText escape="false" value="\"#{urls.url_privacyStatement}\";" /> the <h:outputText escape="false" ... /> will it cause any issues? Thanks.

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  • Group functions of outer query inside inner query

    - by superdario
    Hello, I'm using Oracle. I'm trying to compose something like this: SELECT trans_type, (SELECT parameter_value FROM transaction_details WHERE id = MAX(t.trans_id)) FROM (SELECT trans_id, trans_type FROM transactions) t GROUP BY trans_type So, I am trying to use a result of grouping inside an inner query. But I am getting the error that I cannot use a group function inside the inner query: ORA-00934: group function is not allowed here Can you offer an alternative other than resorting to another outer query?

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  • How to look stored value in CoreData ?

    - by Meko
    Hi.I am new on iphone development and I have problem with CoreData. I hardly made to sore value in CoreData but How can I look those value like in MySql WorkBench you can see the tables ad also values.In CoreData am I have chance like that?

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