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  • Getting error on inserting tuple values in postgreSQL table using python

    - by rahman.bd
    Hello, I want to keep last.fm's user recent music tracks list to postgresql database table using pylast interface.But when I tried to insert values to the table it shows errors.Code example: for i, artist in enumerate(recent_tracks): for key in sorted(artist): cur.execute(""" INSERT INTO u_recent_track(Playback_date,Time_stamp,Track) VALUES (%s,%s)""", (key, artist[key])) conn.commit() cur.execute("SELECT * FROM u_recent_track;") cur.fetchone() for row in cur: print ' '.join(row[1:]) cur.close() conn.close() Here "recent_tracks" tuple have the values for example: artist 0 - playback_date : 5 May 2010, 11:14 - timestamp : 1273058099 - track : Brian Eno - Web I want to store these value under u_recent_track(Tid,Playback_date,Time_stamp,Track).Can anybody have idea how to sort out this problem? when I tried to run, it shows error: Traceback (most recent call last): File "F:\JavaWorkspace\Test\src\recent_track_database.py", line 50, in <module> VALUES (%s,%s,%s)""", (key, artist[key])) IndexError: tuple index out of range Thanks in advanced!

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  • Launching desired version of XCode from Finder

    - by Andy J Buchanan
    My google-fu has failed me, and I guess this may be basic OS X/Xcode knowledge but.... When I double click .xcodeproj files, I'm getting the Beta I have installed launching instead of the stable release - which is the one I actually want. I have tried changing the launch program in the finder info window, but it always displays as "Xcode" and doesn't seem to accept that there are different versions - even though it offers them to me in the drop down list. Is there an xcode setting for this? Thanks.

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  • Java JFileChooser getAbsoluteFile Add File Extension

    - by ikurtz
    i have this issue working but i would like to know if there is a better way of adding the file extension? what i am doing right now is: String filePath = chooser.getSelectedFile().getAbsoluteFile() + ".html"; im adding the extension hard coded. and then saving to it. just wondering if there is a more robust/logical manner this can be implemented? thank you for your time. EDIT: i ask this as i would like my app to be portable across platforms. so adding .html manually i may make this a windows only solution.

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  • Modifying all HTTP requests on iPhoneOS with MobileSubstrate?

    - by Yifan
    I want to write a MobileSubstrate (http://www.iphonedevwiki.net/index.php/MobileSubstrate) addon that takes every HTTP request and modifies the URL. (The reason is very complicated and would take a while to explain, so just trust me that there's not an alternative). Basically, I need to know what's the best Objective-C message or C function that I should overwrite to intercept any HTTP request, modify the URL, and send the request back to the original function (this shouldn't be just the first request sent by an application, but any redirects too). I think it may be in NSURL or CFNetwork, but am not sure where exactly. This function should, when replaced, work with any apps and the OS itself.

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  • How do I wait until a console application is idle?

    - by Anthony Mastrean
    I have a console application that starts up, hosts a bunch of services (long-running startup), and then waits for clients to call into it. I have integration tests that start this console application and make "client" calls. How do I wait for the console application to complete its startup before making the client calls? I want to avoid doing Thread.Sleep(int) because that's dependent on the startup time (which may change) and I waste time if the startup is faster. Process.WaitForInputIdle works only on applications with a UI (and I confirmed that it does throw an exception in this case). I'm open to awkward solutions like, have the console application write a temp file when it's ready.

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  • Need some serious help with self join issue.

    - by kralco626
    Well as you may know, you cannot index a view with a self join. Well actually even two joins of the same table, even if it's not technically a self join. A couple of guys from microsoft came up with a work around. But it's so complicated I don't understand it!!! The solution to the problem is here: http://jmkehayias.blogspot.com/2008/12/creating-indexed-view-with-self-join.html The view I want to apply this work around to is: create VIEW vw_lookup_test WITH SCHEMABINDING AS select count_big(*) as [count_all], awc_txt, city_nm, str_nm, stru_no, o.circt_cstdn_nm [owner], t.circt_cstdn_nm [tech], dvc.circt_nm, data_orgtn_yr from ((dbo.dvc join dbo.circt on dvc.circt_nm = circt.circt_nm) join dbo.circt_cstdn o on circt.circt_cstdn_user_id = o.circt_cstdn_user_id) join dbo.circt_cstdn t on dvc.circt_cstdn_user_id = t.circt_cstdn_user_id group by awc_txt, city_nm, str_nm, stru_no, o.circt_cstdn_nm, t.circt_cstdn_nm, dvc.circt_nm, data_orgtn_yr go Any help would be greatly apreciated!!! Thanks so much in advance!

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  • ack (perl?) regexp matching lines where if is the first word

    - by Gauthier
    Hey. I'm finally learning regexps, training with ack. I believe this uses perl regexp. I want to match all lines where the first non-blank characters are if (<word> !, with any number of spaces in between the elements. This is what I came up with: ^[ \t]*if *\(\w+ *! It only nearly worked. ^[ \t]* is wrong, since it matches one or none [space or tab]. What I want is to match anything that may contain only space or tab (or nothing). For example these should not match: // if (asdf != 0) else if (asdf != 1) How can I modify my regexp for that?

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  • Need alternative field names for these reserved words

    - by MattSlay
    “type” and “class” are likely reserved or problematic words in C# and/or Ruby, two languages I may use to program against my new database schema in the future. So, in order to avoid potential conflicts with those languages, I’m looking for alternative names for these field names in my tables. In this case, it is from my Machines table, where I have: “class” field (values would be something like “manual” or “computerized”) and “type” field (values would be “lathe” or “mill”) I could call the fields “machineclass” and “machinetype”, but that is inconsistent with naming scheme in the rest of my schema (meaning, I do not re-use the table name in the field… For instance, I use Machine.name, not Machine.machinename) Any thought on this madness?

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  • How to set a reference from one object to another?

    - by Tzur Gazit
    Hi, Imagine the obvious model of employees and departments, where each employee must refer to a single department, and each department may have none to many employees. For Employee I have a pointer to Department, and I set its value to the address of the object of the relevant Department. When I try to save the Employee I get an error: 2010-04-07 10:05:22.491 CoreData2[1112:207] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[NSCFDictionary setObject:forKey:]: attempt to insert nil value (key: Department)' I tried, just for testing, to make the reference from Employee to Department optional, but I get the same result. I'm having my first steps in CoreData so please be as clear and simple as you can. Thanks, Tzur.

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  • Sed not working inside bash script

    - by Isabelle
    Hello. I believe this may be a simple question, but I've looked everywhere and tried some workarounds, but I still haven't solved the problem. Problem description: I have to replace a character inside a file and I can do it easily using the command line: sed -e 's/pattern1/pattern2/g' full_path_to_file/file But when I use the same line inside a bash script I can't seem to be able to replace it, and I don't get an error message, just the file contents without the substitution. #!/bin/sh VAR1="patter1" VAR2="patter2" VAR3="full_path_to_file" sed -e 's/${VAR1}/${VAR2}/g' ${VAR3} Any help would be appreciated. Thank you very much for your time.

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  • (My)SQL performance: updating one field vs many unneccesary fields

    - by changokun
    i'm processing a form that has a lot of fields for a user who is editing an existing record. the user may have only changed one field, and i would typically do an update query that sets the values of all the fields, even though most of them don't change. i could do some sort of tracking to see which fields have actually changed, and only update the few that did. is there a performance difference between updating all fields in a record vs only the one that changed? are there other reasons to go with either method? the shotgun method is pretty easy...

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  • Entity Framework associations killing performance

    - by Chris
    Here is the performance test i am looking at. I have 8 different entities that are table per type. Some of the entities contain over 100 thousand rows. This particular application does several recursive calculations on the client so I think it may be best to preload the data instead of lazy loading. If there are no associations I can load the entire database in about 3 seconds. As I add associations in any way the performance starts to drastically decline. I am loading all the data the same way (just calling toList() on the entity attached to the context). I ran the test with edmx generated classes and self tracking entities and had similar results. I am sure if I were to try and deal with the associations myself, similar to how I would in a dataset, the performance problem would go away. On the other hand I am pretty sure this is not how the entity framework was intended to being used. Any thoughts or ideas?

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  • Does the .NET CLR Really Optimize for the Current Processor

    - by dewald
    When I read about the performance of JITted languages like C# or Java, authors usually say that they should/could theoretically outperform many native-compiled applications. The theory being that native applications are usually just compiled for a processor family (like x86), so the compiler cannot make certain optimizations as they may not truly be optimizations on all processors. On the other hand, the CLR can make processor-specific optimizations during the JIT process. Does anyone know if Microsoft's (or Mono's) CLR actually performs processor-specific optimizations during the JIT process? If so, what kind of optimizations?

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  • Unable to load the Starteam Dump into SVN

    - by ssarivis
    Hi, I have a dump created from StarTeam 2008 R 2 (10.4.7.-64) using svn importer 1.1-M8. But when I am trying to import the dump its giving me error: * adding path : tags/Test/GH/13_Environment/Process/Capgemini EN Template - Business Case.doc ...svnadmin: File already exists: filesystem 'help\db', transaction '2-2', path 'tags/Test/GH/13_Environment/Process/Capgemini EN Template - Business Case.doc' I can see from the svn admin load o/p that the file has been added already. May be the dump created by SVN Importer is not correct. Can anyone guide me how to solve this ?

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  • C++ best practice: Returning reference vs. object

    - by Mike Crowe
    Hi folks, I'm trying to learn C++, and trying to understand returning objects. I seem to see 2 ways of doing this, and need to understand what is the best practice. Option 1: QList<Weight *> ret; Weight *weight = new Weight(cname, "Weight"); ret.append(weight); ret.append(c); return &ret; Option 2: QList<Weight *> *ret = new QList(); Weight *weight = new Weight(cname, "Weight"); ret->append(weight); ret->append(c); return ret; (of course, I may not understand this yet either). Which way is considered best-practice, and should be followed? TIA Mike

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  • JavaScript try/catch: errors or exceptions?

    - by Josh
    OK. I may be splitting hairs here, but my code isn't consistent and I'd like to make it so. But before I do, I want to make sure I'm going the right way. In practice this doesn't matter, but this has been bothering me for a while so I figured I'd ask my peers... Every time I use a try... catch statement, in the catch block I always log a message to my internal console. However my log messages are not consistent. They either look like: catch(err) { DFTools.console.log("someMethod caught an error: ",err.message); ... or: catch(ex) { DFTools.console.log("someMethod caught an exception: ",ex.message); ... Obviously the code functions properly either way but it's starting to bother me that I sometimes refer to "errors" and sometimes to "exceptions". Like I said, maybe I'm splitting hairs but which is the proper terminology? "Exception", or "Error"?

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  • Best way to use SFTP folder as concurrent work queue

    - by Gabe Moothart
    I am writing a c# windows service which will be polling an SFTP folder for new files (one file = one job) and processing them. Multiple instances of the service may be running at the same time, so it is important that they do not step on each other. I realize that an SFTP folder does not make an ideal queue, but that's what I have to work with. What do I need to do to either use this SFTP folder as a concurrent message queue, or safely represent it in a way that can be used concurrently?

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  • What is the best practise to create MSI with some other child MSI as prerequisite?

    - by sankar
    Currently we are using Innosetup as a bootstrapper to install the MSI prerequisites. It makes bit complex to maintain the setup. I found that burn tool which may help us to resolve this issue by having a single setup to install whatever we need. I could not find either documentation or sample for this tool. Is anyone have idea about this? or you can give me the alternate solution if you have. Looking for the alternate soltuion for the actions that we do with ISS bootstrapper now: Extract the files (Main setup, Prerequisite setup) Need to ensure prerequisites status and install on demand. Start main install.

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  • Permission denied - /tmp/.ruby_inline/Inline_ImageScience_cdab.c

    - by Ikaros
    I have a Ruby on Rails app that I've recently deployed to a remote server (Ubuntu 9.10, nginx, passenger, ruby-enterprise) and I'm getting the error (works fine locally): Permission denied - /var/www/project_name/tmp/.ruby_inline/Inline_ImageScience_cdab.c First, the folder /tmp/.ruby_inline/ is empty - should it be? Is it trying to create Inline_ImageScience_cdab.c or read it? I think I have all the required gems installed: 'gem list' shows image_science and RubyInline installed. libfreeimage3 and libfreeimage-dev are also installed. I've run chmod 755 on /tmp/.ruby_inline/ to match the permissions on surrounding folders but I cannot go any higher than that, however, or I get another error: /var/www/project_name/tmp/.ruby_inline is insecure (40777). It may not be group or world writable. Exiting. And I guess second, why am I getting this error? :) Thanks

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  • Operation can only be performed on cells that belong to a DataGridView control

    - by The Demigeek
    The following code throws an InvalidOperationException with the above message and I don't understand why. My code calls the following method when the user may have made changes to the datagridview's underlying data source. The goal is to update the display with any changed data, and preserve the sort column and order. private void ReloadDataGridBindingListFromDatabase() { DataGridView dgv = myDataGridViewControl; DataGridViewColumn sortedColumn = dgv.SortedColumn; SortOrder sortOrder = dgv.SortOrder; //do stuff here to refresh dgv.DataSource if (sortedColumn != null) { //this line throws an exception sortedColumn.HeaderCell.SortGlyphDirection = sortOrder; } //etc. } Clearly, sortedColumn.HeaderCell is a cell that belongs to a DataGridView control. So why am I getting this exception? Many thanks for your input.

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  • How to get current location with an accept accuracy in Android

    - by virsir
    I am trying to locate user's device to get its current location with coarse method. The problem is that I can only accept a location with accuracy of 1000m, my code like this: public void onLocationChanged(Location location) { currentLocation = location; if(location.hasAccuracy()) { if(location.getAccuracy() < 1000) { locationManager.removeUpdates(this); callback(); //do callback here } } } But what if the network is not good and I can not get the location with that accuracy? I may want to accept the latest location I got if I have requested its location for some time, like 1 minute. Then how can I control the request time, for example, 1 minute, if it did not get the accurate location until then, I will stop it and then accept the latest location I have got if exist.

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  • Switching Android SensorManager speed. What's a good practice?

    - by Johnson Tey
    Hello stackoverflow! I'm interested to switch between different sensor orientation speeds over time to optimize the program ie.. battery life. The routine may be called very often. I'm looking for the right practice. sensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE); sensorManager.registerListener(sensorListener, SensorManager.SENSOR_ORIENTATION, SensorManager.SENSOR_DELAY_FASTEST); //... 1) unregister then register new speed OR //... 2) register new speed without registering sensorManager.unregisterListener(sensorListener); Should I unregister the listener and then register with SensorManager.SENSOR_DELAY_NORMAL OR Should I not bother unregistering the listener? thanks.

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  • WCF configuration setting information at a glance

    - by Newbie
    Is there any site from where I can get the most of the information about WCF configuration settings e.g. keyEntropyMode,maxStatefulNegotiations,sessionKeyRolloverInterval, negotiationTimeout etc. I have started recently working in wcf but is facing many troubles in understanding the terms. There are to be honest huge. And whenever I get stuck, it takes a long time for me to solve it (searching and searching in google and after spending sometime hours I may get the solution). Henceforth, I think it is better to know if not all astleast some of the terms and their usage and what they means. It would be great help if anyone can point such a link. I searched in the net with " wcf configuration file elements" but with not much luck. Thanks

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  • Should a given URI in a RESTful architecture always return the same response?

    - by keithjgrant
    This is kind of a follow-up question to this one. So is having a unique response for any given URI a core tenant of RESTful architecture? A lot of discussion here tends that direction, but I haven't seen it anywhere as a "hard and fast" rule. I understand the value of it (for caching, crawling, passing links, etc), but I also see things like the twitter API violate it (A request to http://api.twitter.com/1/statuses/friends_timeline.xml will vary based on the username given), and I understand there are times when it may be necessary--not to mention that a chronologically paged resource will also change as new elements are added. Should I strive for varied responses from the same URI to be eliminated altogether, or do I just accept that sometimes it isn't practical, and as long as I minimize its occurrence, I'll be in decent shape.

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  • jquery calendarpicker callback pass querystring

    - by user577318
    Trying to use this CalendarPicker source and docs here: http://bugsvoice.com/applications/bugsVoice/site/test/calendarPickerDemo.jsp I need to be able to pass the date selected as query string variable of "searchdate" and reload page also updating current date for calendarPicker with querystring date on page reload. This is what I have so far: jQuery(document).ready(function() { var calendarPicker = jQuery("#calendarpicker").calendarPicker({ monthNames:["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"], dayNames: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"], years:0, months:6, days:5, showDayArrows:true, callback:function(cal) { // Simple output to test calendar date change jQuery("#output").html("Selected date: " + cal.currentDate.getFullYear()+"-"+cal.currentDate.getMonth()+"-"+cal.currentDate.getDate() ); // Not working well since it also includes arrows from datepicker as selectors jQuery(".calDay").children().click(function() { window.location.href="mysite.com?searchdate="+cal.currentDate.getFullYear()+"-"+cal.currentDate.getMonth()+"-"+cal.currentDate.getDate(); }); } }); Any help greatly appreciated. Can this be done with ajax? I am attempting to update a table of events by datepicker.

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