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  • What is the best practise for relational database tables in mysql?

    - by George
    Hi, I know, there is a lot of info on mysql out there. But I was not really able to find an answer to this specific and actually simple question: Let's say I have two tables: USERS (with many fields, e.g. name, street, email, etc.) and GROUPS (also with many fields) The relation is (I guess?) 1:n, that is ONE user can be a member of MANY groups. What I dis, is create another table, named USERS_GROUPS_REL. This table has only two fields: us_id (unique key of table USERS) and gr_id (unique key of table GROUPS) In PHP I do a query with join. Is this "best practice" or is there a better way? Thankful for any hint!

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  • Extract rows for the first occurrence of a variable in a data frame

    - by user2614883
    I have a data frame with two variables, Date and Taxa and want to get the date for the first time each taxa occurs. There are 9 different dates and 40 different taxa in the data frame consisting of 172 rows, but my answer should only have 40 rows. Taxa is a factor and Date is a date. For example, my data frame (called 'species') is set up like this: Date Taxa 2013-07-12 A 2011-08-31 B 2012-09-06 C 2012-05-17 A 2013-07-12 C 2012-09-07 B and I would be looking for an answer like this: Date Taxa 2012-05-17 A 2011-08-31 B 2012-09-06 C I tried using: t.first <- species[unique(species$Taxa),] and it gave me the correct number of rows but there were Taxa repeated. If I just use unique(species$Taxa) it appears to give me the right answer, but then I don't know the date when it first occurred. Thanks for any help.

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  • Which httpd.conf and php.ini files does plesk use

    - by Saif Bechan
    If i disable the include_path in /etc/php.ini, i can still see that there is an include path loaded from somewhere. I want to know where this file is. If i use phpinfo(); on my domain i get that there is a include path /usr/share/pear:/usr/share/php, even though in the php.ini i used: ;inlucde_path=".:" In the section for aditional php.ini files this is the list: /etc/php.d/curl.ini, /etc/php.d/dbase.ini, /etc/php.d/dom.ini, /etc/php.d/gd.ini, /etc/php.d/imap.ini, /etc/php.d/json.ini, /etc/php.d/mbstring.ini, /etc/php.d/mysql.ini, /etc/php.d/mysqli.ini, /etc/php.d/pdo.ini, /etc/php.d/pdo_mysql.ini, /etc/php.d/pdo_sqlite.ini, /etc/php.d/wddx.ini, /etc/php.d/xmlreader.ini, /etc/php.d/xmlwriter.ini, /etc/php.d/xsl.ini, /etc/php.d/zip.ini I have checked all these files but i can nowhere find a reference to pear. This said the /etc/httpd/conf/httpd.conf file is questioning to me too. If i check this file i can see the following values are defined. DocumentRoot "/var/www/html" <Directory /> Order Deny,Allow Deny from all Options None AllowOverride None </Directory> <Directory "/var/www/html"> Options None AllowOverride None Order allow,deny Allow from all </Directory> The strange thing is that i don't even use this directory, so where does plesk get his httpd.conf file from. I want to check if everything is ok, because my vhost.conf is not working. I don't know if i should change these values or not, and where i can find the values plesk uses. i hope someone can help me with this.

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  • Is there a fix to display 0 when arithmetic underflow occurs on the Windows 7 calculator?

    - by Pascal Qyy
    I have a problem that exasperates me: When I take the Windows 7 calculator in standard mode, if I do 4, then v (square root), the result is 2 Fine. But, at this point, if I do - (minus), then 2, the result is -1,068281969439142e-19 instead of 0! OK, I know about ? (machine epsilon), and yes, -1,068281969439142e-19 is less than the 64 bits ? (1.11e-16), so, we have an arithmetic underflow, in other words in this case: 0. Great, my computer is able to represent subnormal numbers instead of just flush to zero when this happens, and it seems that it is an improvement! Subnormal values fill the underflow gap with values where the absolute distance between them are the same as for adjacent values just outside of the underflow gap. This is an improvement over the older practice to just have zero in the underflow gap, and where underflowing results were replaced by zero (flush to zero). BUT: this result is false! when you try to explain the concept of the square root to a child and you end up with this kind of result, it only complicates your task... what is the point to represent subnormal numbers in a standard, non scientific calculator? So, is there a way to fix this?

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  • Strange ASP.NET Queue Performance Counters Behavior?

    - by LemurTech
    We have an ASP.NET 2.0 site running in classic mode. I am seeing very strange behavior in the performance counter values. Perhaps these are bugs (I've been all over Google trying to verify this, without much luck), or perhaps it is just my inexperience with monitoring these things. This PerfMon graph (http://imgur.com/Jv5io5J) represents a load test where I add up to 350 virtual users to the site, at a rate of about 1/sec, performing relatively simple page browsing. At the end of the test, I gradually taper off the number of users. This is a 4 CPU server. Machine.config settings for are at the defaults. The solid blue line is ASP.NET Apps v2.x\Requests Executing for the application in question. The profile makes perfect sense, with a quick ramp-up to 32 executing requests (minWorkerThreads x 4CPUs), followed by a slower ramp-up to 48 ((maxWorkerThreads - minWorkerThreads) x 4CPUs). The solid yellow line is ASP.NET v2.x\Requests Queued. Again, this makes sense: after the initial 32 request threads are activated, the queue begins to build as new thread initialization can't keep pace with incoming requests. But as executing requests reaches its highest possible value of 48, the counter for ASP.NET Apps v2.x\Requests Queued (green solid line) suddenly springs to life and maintains step with the yellow counter. As far as I can tell, and with no other apps running on the server, these two counters should have had the same values from the start. One other odd thing: The counter for ASP.NET v2.x\Request Wait Time (dotted yellow line) also does not spring to life until executing requests reaches 48. Shouldn't I be seeing values here from the moment ASP.NET v2.x\Requests Queued begins to build? And likewise, why would ASP.NET Apps v2.x\Request Execution Time (dotted blue) increase significantly only after that peak of 48 is reached? Shouldn't it ramp-up gradually along with queued requests?

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  • What could cause these "failed to authenticate" logs other than failed login attempts (OSX)?

    - by Tom
    I've found this in the Console logs: 10/03/10 3:53:58 PM SecurityAgent[156] User info context values set for tom 10/03/10 3:53:58 PM authorizationhost[154] Failed to authenticate user (tDirStatus: -14090). 10/03/10 3:54:00 PM SecurityAgent[156] User info context values set for tom 10/03/10 3:54:00 PM authorizationhost[154] Failed to authenticate user (tDirStatus: -14090). 10/03/10 3:54:03 PM SecurityAgent[156] User info context values set for tom 10/03/10 3:54:03 PM authorizationhost[154] Failed to authenticate user (tDirStatus: -14090). There are about 11 of these "failed to authenticate" messages logged in quick succession. It looks to me like someone is sitting there trying to guess the password. However, when I tried to replicate this I get the same log messages except that this extra message appears after five attempts: 13/03/10 1:18:48 PM DirectoryService[11] Failed Authentication return is being delayed due to over five recent auth failures for username: tom. I don't want to accuse someone of trying to break into an account without being sure that they were actually trying to break in. My question is this: is it almost definitely someone guessing a password, or could the 11 "failed to authenticate" messages be caused by something else?

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  • High IOWait executing JBoss 3.2.7

    - by user64205
    Server Details: Kernel: Linux wiq31 2.4.21-9.ELsmp #1 SMP Thu Jan 8 17:08:56 EST 2004 i686 i686 i386 GNU/Linux CPU: 4 x Intel(R) Xeon(TM) CPU 3.06GHz Memory: 1028520 kB JBoss version: 3.2.7 Every time i try to start JBoss, in all CPU's, the iowait values starts to raise and the idle values starts to fall. Before executing my JBoss application, the free command returns the following output: *total used free shared buffers cached Mem: 1028520 966400 62120 0 187756 538928 -/+ buffers/cache: 239716 788804 Swap: 2044072 790672 1253400* After starting my JBoss application, the free command returns the following output: *total used free shared buffers cached Mem: 1028520 1007648 20872 0 187116 524084 -/+ buffers/cache: 296448 732072 Swap: 2044072 819096 1224976* After starting my JBoss application, without answering any request, the java process /proc/PID/status file have the following values: State: S (sleeping) SleepAVG: 27% Tgid: 24022 Pid: 24022 PPid: 21011 TracerPid: 0 Uid: 500 500 500 500 Gid: 500 500 500 500 FDSize: 256 Groups: 500 VmSize: 775200 kB VmLck: 0 kB VmRSS: 156752 kB VmData: 696752 kB VmStk: 36 kB VmExe: 21 kB VmLib: 710375 kB StaBrk: 0804f000 kB Brk: 095bb000 kB StaStk: bffff8c0 kB ExecLim: ffffffff Threads: 62 SigPnd: 0000000000000000 ShdPnd: 0000000000000000 SigBlk: 0000000000000000 SigIgn: 0000000000000000 SigCgt: 1000000180015ccf CapInh: 0000000000000000 CapPrm: 0000000000000000 CapEff: 0000000000000000 Is this behavior being caused by memory swapping, or the short memory available in the server is enough to run my application?

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  • Parsing text files

    - by d03boy
    I encountered a situation tonight where I wanted to parse a text file. I had a very, very long word list that contained English words delimited by lines. I wanted to get rid of every word (or line) that was longer than 7 characters. This would be simple in Linux but I can't seem to find a simple solution in WindowsXP. I tried using Notepad++ regular expression search but that was a huge failure. I tried using the expression .{6,} without finding any matches. I'm really at a loss because I thought this sort of thing would be extremely easy and there would be tons of tools to accomplish a task like this. It seems like Notepad++ supports every other feature in the world except the very basic ones that seem the most obvious. Another one of my goals was to put some code before and after the word on each line. aardvark apple azolio would turn into INSERT INTO Words (word) VALUES ('aardvark'); INSERT INTO Words (word) VALUES ('apple'); INSERT INTO Words (word) VALUES ('azolio'); What suggestions/tools/tips do you have to accomplish tasks similar to this in WindowsXP?

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  • Copy/paste filtered column in Excel - error message

    - by hazymat
    Firstly I should state that I don't believe in spreadsheets; my normal mode of operation is that data should either exist in a database or a text file... However - employment requires... In short, I have filtered a worksheet by column A, and I want to copy/paste from column B to column C. Obviously I don't wish to copy/paste values from rows that were filtered-out here. The above sounds ridiculously simple, right? First I tried simply copy/pasting on the filtered worksheet. This appeared to select and copy only the filtered data, however pasting appeared to insert values into hidden/filtered rows - as you might expect. So my initial research suggests I may wish to select the filtered data and press Alt+; (that is, ALT plus semicolon), which is a shortcut key for Goto Special Select Visible. Then just copy-paste. CTRL+C correctly copies the filtered data, however when I go to paste the values into another column, it pastes into hidden rows as well. Okay, so perhaps I should also "Select Visible" on the cells I wish to paste into as well? Nope - that gives me the error That command cannot be used on multiple selections. What am I doing wrong?!

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  • virtual memory commited

    - by vinu
    After a server bounce happens, and after around 40-45 days time period, we receive continuous “Committed Virtual Memory” alerts which indicates the usage of swap space in the magnitude of 4GB This also causes the application to perform very slowly and experience a number of stalled transactions. Server Setup: 4 Tomcat Servers (version 7.0.22) that are load balanced (not clustered) by 2 Apache Servers. And the Apache servers themselves supply static content and routing to these 4 tomcat servers. Java Runtime Version: java version "1.6.0_30" Java(TM) SE Runtime Environment (build 1.6.0_30-b12) Java HotSpot(TM) 64-Bit Server VM (build 20.5-b03, mixed mode Memory Startup Parameters: MEMORY_OPTIONS="-Xms1024m -Xmx1024m -Xss192k -XX:MaxGCPauseMillis=500 -XX:+HeapDumpOnOutOfMemoryError -XX:MaxPermSize=256m -XX:+CMSClassUnloadingEnabled" Monitoring – Wily monitoring is available in all the production servers that monitors key server parameters and sends out configurable alert emails based on pre defined settings. Note: Each of the servers also has two other separate tomcat domains that run different applications Investigated area: There is no Heap Memory Leak and the GC is running fine without any issues over any period of time The current busy thread count corresponds directly to the application usage – weekends and nights have lesser no. of threads compared to business hours ThreadLocal uses a WeakReference internally. If the ThreadLocal is not strongly referenced, it will be garbage-collected, even though various threads have values stored via that ThreadLocal. Additionally, ThreadLocal values are actually stored in the Thread; if a thread dies, all of the values associated with that thread through a ThreadLocal are collected. If you have a ThreadLocal as a final class member, that's a strong reference, and it cannot be collected until the class is unloaded. But this is how any class member works, and isn't considered a memory leak. The cited problem only comes into play when the value stored in a ThreadLocal strongly references that ThreadLocal—sort of a circular reference. In this case, the value (a SimpleDateFormat), has no backwards reference to the ThreadLocal. There's no memory leak in this code. Can anyone please let me know what could be the cause of this and what to be monitored?

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  • PC power supply & normal range for voltages reported in BIOS hardware monitor?

    - by Chris W. Rea
    I'm trying to diagnose whether my computer has an ample power supply. Sometimes when I play a video-intensive game, both monitors lose the video signal, even though the computer remains on and sound playing. A theory I have is: the video card isn't getting sufficient power. I can't imagine it's overheating because the machine is well-ventilated and the video card isn't hot to touch when this happens. Anyway, in my PC's BIOS there's a Hardware Monitor page, and among other voltages reported (such as CPU, DRAM, South Bridge, etc.) I can see the following values: 3.3V 3.152V 5V 4.944V 12V 11.872V Are those the voltages used by peripherals? What voltage should I be referencing if I want to know what my video card (PCI Express) is consuming? What is the normal range of values reported for those? My values above appear to be under by approximately 4.5%, 1.1%, and 1.1% respectively. Is that cause for concern? How else should I be determining if my power supply is "right-sized" for my PC and video card, or am I perhaps barking up the wrong tree?

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  • What could cause these "failed to authenticate" logs other than failed login attempts (OSX)?

    - by Tom
    I've found this in the Console logs: 10/03/10 3:53:58 PM SecurityAgent[156] User info context values set for tom 10/03/10 3:53:58 PM authorizationhost[154] Failed to authenticate user (tDirStatus: -14090). 10/03/10 3:54:00 PM SecurityAgent[156] User info context values set for tom 10/03/10 3:54:00 PM authorizationhost[154] Failed to authenticate user (tDirStatus: -14090). 10/03/10 3:54:03 PM SecurityAgent[156] User info context values set for tom 10/03/10 3:54:03 PM authorizationhost[154] Failed to authenticate user (tDirStatus: -14090). There are about 11 of these "failed to authenticate" messages logged in quick succession. It looks to me like someone is sitting there trying to guess the password. However, when I tried to replicate this I get the same log messages except that this extra message appears after five attempts: 13/03/10 1:18:48 PM DirectoryService[11] Failed Authentication return is being delayed due to over five recent auth failures for username: tom. I don't want to accuse someone of trying to break into an account without being sure that they were actually trying to break in. My question is this: is it almost definitely someone guessing a password, or could the 11 "failed to authenticate" messages be caused by something else? EDIT: The actual user wasn't logged in, or using a computer at the time of the log in attempts.

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  • How to see the properties of a DOM element as they change in realtime?

    - by allquixotic
    JavaScript code can update the properties/attributes of DOM elements in real time by responding to events and so on. Here is an example. In the table on that page, move your mouse over the cells. Notice how they change color when the mouse is on them, and the color goes away when you move the mouse to another cell. Now, using Firefox or Chrome (but not IE, Opera, etc.), I want to examine the background color, expressed in RGB or hex or whatever, of the cells updated in real time, as the mouse cursor enters and leaves the region and causes the JS to do its thing. The behavior that I observe, currently, is that the Inspect Element functionality of both Firefox and Chrome does not update the value of the properties as they are updated by JavaScript. So, in order to view the latest value of the property, I have to inspect the element again, and it takes a momentary "snapshot" of the values. But since the values only change while I have the mouse on them, I can't take a snapshot of the value I want while my mouse cursor is over the cell, because I have to remove my mouse from the cell to select the "Inspect Element" item in the right-click list! If it is possible to have the values updated in real time using either Firefox or Chrome, or an extension, on any recent version of the software (up to the latest stable), please provide instructions for doing so.

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  • Sed: Deleting all content matching a pattern

    - by Svish
    I have some plist files on mac os x that I would like to shrink. They have a lot of <dict> with <key> and values. One of these keys is a thumbnail which has a <data> value with base64 encoded binary (I think). I would like to remove this key and value. I was thinking this could maybe be done by sed, but I don't really know how to use it and it seems like sed only works on a line-by-line basis? Either way I was hoping someone could help me out. In the file I would like to delete everything that matches the following pattern or something close to that: <key>Thumbnail<\/key>[^<]*<\/data> In the file it looks like this: // Other keys and values <key>Thumbnail</key> <data> TU0AKgAAOEi25Pqx3/ip2fak0vOdzPCVxu2RweuPv+mLu+mIt+aGtuaEtOSB ... dCBBcHBsZSBDb21wdXRlciwgSW5jLiwgMjAwNQAAAAA= </data> // Other keys and values Anyone know how I could do this? Also, if there are any better tools that I can use in the terminal to do this, I would like to know about that as well :)

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  • Why doesn't the value in /proc/meminfo seem to map exactly to the system RAM?

    - by Eric Asberry
    The values in /proc/meminfo for MemTotal don't make sense. As a human, eyeballing it, it seems to roughly correspond to the installed RAM, but for using it to display the installed RAM from an automated utility it appears to be inexact, and inconsistent. For a system with 1G of RAM, I would expect the MemTotal line to have a value of 1048576 - 1024*1024. But instead, I'm seeing 1029392. On another 4G box, I'm seeing 3870172, which is not a multiple of 1024, and it's not even close to 1029392*4. On an 8G box, I get 8128204, which again seems to have no correlation to the other values, nor is it a multiple of 1024. I'm trying to use this information to report the RAM on a status web page. My work-around is to just "round" it to the nearest 1G multiple, but I'd like to understand why these values seem inconsistent and don't match my expectations. Can somebody fill me in on what I'm missing here? EDIT: To expand on the accepted answer below.... The reference can be found here. Also of interest to me from that page, which explains the inconsistency, is this bit: meminfo: Provides information about distribution and utilization of memory. This varies by architecture and compile options. ...

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  • Sed issue with numbers exceeding 9

    - by Imane Fateh
    May be my problem is kinda obvious for you but I really need to get a solution. I need to generate a file.sql file from a file.csv, so I use this command : cat file.csv |sed "s/\(.*\),\(.*\)/insert into table(value1, value2) values\('\1','\2'\);/g" > file.sql It works perfectly, but when the values exceed 9 (for example for \10, \11 etc...) it takes consideration of only the first number (which is \1 in this case) and ignores the rest. I want to know if I missed something or if there is another way to do it. Thank you ! EDIT : The not working example : My file.csv looks like 2013-04-01 04:00:52,2,37,74,40233964,3860,0,0,4878,174,3,0,0,3598,27.00,27 What I get insert into table val1,val2,val3,val4,val5,val6,val7,val8,val9,val10,val11,val12,val13,val14,val15,val16 values ('2013-04-01 07:39:43',2,37,74,36526530,3877,0,0,6080,2013-04-01 07:39:430,2013-04-01 07:39:431,2013-04-01 07:39:432,2013-04-01 07:39:433,2013-04-01 07:39:434,2013-04-01 07:39:435,2013-04-01 07:39:436); After the ninth element I get the first one instead of the 10th,11th etc...

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  • wpf scrollviewer scrolltoverticaloffset

    - by user279244
    The events scrolltoVerticalOffset or the scrolltoHorizontalOffset do not change the values of the scrollviewer. Please tell me at which event does the values HorizontalOffset and the VerticalOffset get changed? I have tried LayoutUpdated() method but it goes in a infinite loop. Thanks in advance

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  • Where is meta.local_fields set in django.db.models.base.py ?

    - by BryanWheelock
    I'm getting the error: Exception Value: (1110, "Column 'about' specified twice") As I was reviewing the Django error page, I noticed that the customizations the model User, seem to be appended to the List twice. This seems to be happening here in django/db/model/base.py in base_save(): values = [(f, f.get_db_prep_save(raw and getattr(self, f.attname) or f.pre_save(self, True))) for f in meta.local_fields] this is what Django error page shows values to be: values = [(<django.db.models.fields.CharField object at 0xa78996c>, u'kallie'), (<django.db.models.fields.CharField object at 0xa7899cc>, ''), (<django.db.models.fields.CharField object at 0xa789a2c>, ''), (<django.db.models.fields.EmailField object at 0xa789a8c>, u'[email protected]'), (<django.db.models.fields.CharField object at 0xa789b2c>, 'sha1$d4a80$0e5xxxxxxxxxxxxxxxxxxxxddadfb07'), (<django.db.models.fields.BooleanField object at 0xa789bcc>, False), (<django.db.models.fields.BooleanField object at 0xa789c6c>, True), (<django.db.models.fields.BooleanField object at 0xa789d2c>, False), (<django.db.models.fields.DateTimeField object at 0xa789dcc>, u'2010-02-03 14:54:35'), (<django.db.models.fields.DateTimeField object at 0xa789e2c>, u'2010-02-03 14:54:35'), # this is where the values from the User model customizations show up (<django.db.models.fields.BooleanField object at 0xa8c69ac>, False), (<django.db.models.fields.CharField object at 0xa8c688c>, None), (<django.db.models.fields.PositiveIntegerField object at 0xa8c69cc>, 1), (<django.db.models.fields.CharField object at 0xa8c69ec>, 'b5ab1603b2308xxxxxxxxxxx75bca1'), (<django.db.models.fields.SmallIntegerField object at 0xa8c6dac>, 0), (<django.db.models.fields.SmallIntegerField object at 0xa8c6e4c>, 0), (<django.db.models.fields.SmallIntegerField object at 0xa8c6e8c>, 0), (<django.db.models.fields.SmallIntegerField object at 0xa8c6ecc>, 10), (<django.db.models.fields.DateTimeField object at 0xa8c6eec>, u'2010-02-03 14:54:35'), (<django.db.models.fields.CharField object at 0xa8c6f2c>, ''), (<django.db.models.fields.URLField object at 0xa8c6f6c>, ''), (<django.db.models.fields.CharField object at 0xa8c6fac>, ''), (<django.db.models.fields.DateField object at 0xa8c6fec>, None), (<django.db.models.fields.TextField object at 0xa8cb04c>, ''), # at this point User model customizations repeats itself (<django.db.models.fields.BooleanField object at 0xa663b0c>, False), (<django.db.models.fields.CharField object at 0xaa1e94c>, None), (<django.db.models.fields.PositiveIntegerField object at 0xaa1e34c>, 1), (<django.db.models.fields.CharField object at 0xaa1e40c>, 'b5ab1603b2308050ebd62f49ca75bca1'), (<django.db.models.fields.SmallIntegerField object at 0xa8c6d8c>, 0), (<django.db.models.fields.SmallIntegerField object at 0xaa2378c>, 0), (<django.db.models.fields.SmallIntegerField object at 0xaa237ac>, 0), (<django.db.models.fields.SmallIntegerField object at 0xaa237ec>, 10), (<django.db.models.fields.DateTimeField object at 0xaa2380c>, u'2010-02-03 14:54:35'), (<django.db.models.fields.CharField object at 0xaa2384c>, ''), (<django.db.models.fields.URLField object at 0xaa2388c>, ''), (<django.db.models.fields.CharField object at 0xaa238cc>, ''), (<django.db.models.fields.DateField object at 0xaa2390c>, None), (<django.db.models.fields.TextField object at 0xaa2394c>, '')] Since this app is in Production, I can't figure out how to use pdb.set_trace() to see what's going on inside of save_base. The customizations to User are: User.add_to_class('email_isvalid', models.BooleanField(default=False)) User.add_to_class('email_key', models.CharField(max_length=16, null=True)) User.add_to_class('reputation', models.PositiveIntegerField(default=1)) User.add_to_class('gravatar', models.CharField(max_length=32)) User.add_to_class('email_feeds', generic.GenericRelation(EmailFeed)) User.add_to_class('favorite_questions', models.ManyToManyField(Question, through=FavoriteQuestion, related_name='favorited_by')) User.add_to_class('badges', models.ManyToManyField(Badge, through=Award, related_name='awarded_to')) User.add_to_class('gold', models.SmallIntegerField(default=0)) User.add_to_class('silver', models.SmallIntegerField(default=0)) User.add_to_class('bronze', models.SmallIntegerField(default=0)) User.add_to_class('questions_per_page', models.SmallIntegerField(choices=QUESTIONS_PER_PAGE_CHOICES, default=10)) User.add_to_class('last_seen', models.DateTimeField(default=datetime.datetime.now)) User.add_to_class('real_name', models.CharField(max_length=100, blank=True)) User.add_to_class('website', models.URLField(max_length=200, blank=True)) User.add_to_class('location', models.CharField(max_length=100, blank=True)) User.add_to_class('date_of_birth', models.DateField(null=True, blank=True)) User.add_to_class('about', models.TextField(blank=True)) Django1.1.1 Python 2.5

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  • JPQL IN clause: Java-Arrays (or Lists, Sets...)?

    - by Bernd Haug
    I would like to load all objects that have a textual tag set to any of a small but arbitrary number of values from our database. The logical way to go about this in SQL would be to build an "IN" clause. JPQL allows for IN, but it seems to require me to specify every single parameter to IN directly (as in, "in (:in1, :in2, :in3)"). Is there some way to specify an array, or a list (or some other container) that should be unrolled to the values of an IN clause?

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  • Algorithm for heat map?

    - by eshan
    I have a list of values each with latitude and longitude. I'm looking to create a translucent heatmap image to overlay on Google Maps. I know there are server side and flash based solutions already, but I want to build this in javascript using the canvas tag. However, I can't seem to find a concise description of the algorithm used to turn coordinates and values into a heatmap. Can anyone provide or link to one? Thanks.

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  • T-SQL: @@IDENTITY, SCOPE_IDENTITY(), OUTPUT and other methods of retrieving last identity

    - by Terrapin
    I have seen various methods used when retrieving the value of a primary key identity field after insert. declare @t table ( id int identity primary key, somecol datetime default getdate() ) insert into @t default values select SCOPE_IDENTITY() --returns 1 select @@IDENTITY --returns 1 Returning a table of identities following insert: Create Table #Testing ( id int identity, somedate datetime default getdate() ) insert into #Testing output inserted.* default values What method is proper or better? Is the OUTPUT method scope-safe? The second code snippet was borrowed from SQL in the Wild

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  • Insert django form into template dynamically using javascript??

    - by qulzam
    I want to add same django form instance on same template. i already add one before and other add dynamically using javascript. for example 'form" is a django form: newcell.innerHTML = {{ form.firstname }}; The problem is that when i submit the form, in view the request object has only one value (that is not add using javascript). how can i get the values of other form elements values that is added dynamically runtime.

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  • django templates array assignment

    - by Hulk
    The following is in views: rows=query.evaluation_set.all() row_arr = [] for row in rows: row_arr.append(row.row_details) dict.update({'row_arr' : row_arr ,'col_arr' : col_arr}) return render_to_response('valuemart/show.html',context_instance=RequestContext(request,{'dict': dict})) How to extract the row_Arr array in the templates in javascript and list out all its values.row_Arr contains data of a column <script> var row_arr = '{{dict.row_arr}}'; //extract values here </script> Thanks..

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  • django views getid

    - by Hulk
    class host(models.Model): emp = models.ForeignKey(getname) def __unicode__(self): return self.topic In views there is the code as, real =[] for emp in my_emp: real.append(host.objects.filter(emp=emp.id)) This above results only the values of emp,My question is that how to get the ids along with emp values. Thanks..

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