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  • PHP CSV, how to get previous and next 3 rows from current row

    - by Kalpesh Mehta
    I am currently using fgetcsv in php to get rows in CSV file. For each row, I need it's 3 previous rows and 3 next rows for some requirement. while(($data = fgetcsv($handle, 5000, ",")) !== FALSE) { //$data is current row data //I need previous rows and next rows data } I don't know how to try this, as each while iterate will be having the current row's information. Is there anything we can achieve this within the fgetcsv loop? I am also open for other alternatives for this problem.

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  • How to tweak the performance of Bit blit on Barco monitors?

    - by krishna
    Hi, The performance of bit blit on Small monitor(16 bpp,60Hz,1280X1024 resolution) it gives 0.9909ms. The performance of big monitors(8bpp,60hz,2048X5260) it gives 52.315ms . I use SRCCOPY to do the bit blit operation.how we can optimize the performance of bit blit on big monitor? Please share your thoughts. Thanks kk

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  • Communicate between separate MPI-Programs

    - by Fyg
    I have the following problem: Program 1 has a huge amount of data, say 10GB. The data in question consists of large integer- and double-arrays. Program 2 has 1..n MPI processes that use tiles of this data to compute results. How can I send the data from program 1 to the MPI Processes? Using File I/O is out of question. The compute node has sufficient RAM.

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  • SQL Server architecture guidance

    - by Liam
    Hi, We are designing a new version of our existing product on a new schema. Its an internal web application with possibly 100 concurrent users (max)This will run on a SQL Server 2008 database. On of the discussion items recently is whether we should have a single database of split the database for performance reasons across 2 separate databases. The database could grow anywhere from 50-100GB over 5 years. We are Developers and not DBAs so it would be nice to get some general guidance. [I know the answer is not simple as it depends on the schema, archiving policy, amount of data etc. ] Option 1 Single Main Database [This is my preferred option]. The plan would be to have all the tables in a single database and possibly to use file groups and partitioning to separate the data if required across multiple disks. [Use schema if appropriate]. This should deal with the performance concerns One of the comments wrt this was that the a single server instance would still be processing this data so there would still be a processing bottle neck. For reporting we could have a separate reporting DB but this is still being discussed. Option 2 Split the database into 2 separate databases DB1 - Customers, Accounts, Customer resources etc DB2 - This would contain the bulk of the data [i.e. Vehicle tracking data, financial transaction tables etc]. These tables would typically contain a lot of data. [It could reside on a separate server if required] This plan would involve keeping the main data in a smaller database [DB1] and retaining the [mainly] read only transaction type data in a separate DB [DB2]. The UI would mainly read from DB1 and thus be more responsive. [I'm aware that this option makes it harder for Referential Integrity to be enforced.] Points for consideration As we are at the design stage we can at least make proper use of indexes to deal performance issues so thats why option 1 to me is attractive and its more of a standard approach. For both options we are considering implementing an archiving database. Apologies for the long Question. In summary the question is 1 DB or 2? Thanks in advance, Liam

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  • Help! Getting an error copying the data from one column to the same column in a similar recordset..

    - by Mike D
    I have a routine which reads one recordset, and adds/updates rows in a similar recordset. The routine starts off by copying the columns to a new recordset: Here's the code for creating the new recordset.. For X = 1 To aRS.Fields.Count mRS.Fields.Append aRS.Fields(X - 1).Name, aRS.Fields(X - 1).Type, aRS.Fields(X - _ 1).DefinedSize, aRS.Fields(X - 1).Attributes Next X Pretty straight forward. Notice the copying of the name, Type, DefinedSize & Attributes... Further down in the code, (and there's nothing that modifies any of the columns between.. ) I'm copying the values of a row to a row in the new recordset as such: For C = 1 To aRS.Fields.Count mRS.Fields(C - 1) = aRS.Fields(C - 1) Next C When it gets to the last column which is a numeric, it craps with the "Mutliple-Step Operation Generated an error" message. I know that MS says this is an error generated by the provider, which in this case is ADO 2.8. There is no open connect to the DB at this point in time either. I'm pulling what little hair I have left over this one... (and I don't really care at this point that the column index is 'X' in one loop & 'C' in the other... I'll change it later when I get the real problem fixed...)

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  • Does Lua support Unicode?

    - by TimK
    Based on the link below, I'm confused as to whether the Lua programming language supports Unicode. http://lua-users.org/wiki/LuaUnicode It appears it does but has limitations. I simply don't understand, are the limitation anything big/key or not a big deal?

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  • How Android BaseAdapter notifyDataSetChanged works?

    - by Yama moto
    In the document for the method notifyDataSetChanged of class BaseAdapter noted that "Notifies the attached observers that the underlying data has been changed and any View reflecting the data set should refresh itself. " Supposed I changed the 3rd element in my string array (array data for the listview), what "any View reflecting the data set should refresh itself" means ? Does the 3rd view item in my list view be notified ? Also, how is notifyDataSetChanged() and getView() concerned ? Thanks in advance

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  • Is there any Disk Cache solution for ASP.NET?

    - by silent
    My client has a busy traffic site with a big amount of pages, ASP.NET's built-in cache solutions is good, but it only stores content into the memory. Since the site has a big amount of pages, so I think disk caching would be a better idea. But after searching I didn't find a solution, any suggestions?

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  • Partitioning a table in mysql after creation

    - by erik
    I have a table with a bunch of data already in it. I know how to create a partitioned table or alter an already existing partitioned table, but can I add partitions to a table after it has been created, has data in it, without losing the data? The other option is to dump all the data, recreate the table with the partitions and then insert it all back it. Is that the only way? Thanks.

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  • svn commit problem, Cannot read 'd:\UC\db\txn-current': End of file found

    - by user369929
    Hi, I have a problem commiting to svn server, Here's what I got, File Can't read 'D:\SVNROOT\UC\db\txn-current'.: End of file found (It's traslation of Korean, so there's might be differ than what English error said..) In previously, I shut down transaction when update from svn, cause some file was so big, so I was shut down downloading for delete big files first, but after that, I got message about 'txn-current', does anybody can help me to solve this? thank you for regarding this

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  • Efficient storage in C#.net App

    - by Tommy
    I'm looking for the fastest, least memory consuming, stand alone storage method available for large amounts of data for my C# app. My initial thoughts: Sql: no. not stand alone XML in flat file: no. takes too long to parse large amounts of data Other Options? Basically what i'm looking for, is a way that i can load with my applications load, keep all the data in my app, and when the data in my app changes just update the storage location.

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  • How are classes more secure than structures ?

    - by Asad Hanif
    Structure's member are public by default ans class's members are private by default. We can access private data members through a proper channel (using member function). If we have access to member functions we can read/write data in private data member, so how it is secure...we are accessing it and we are changing data too.....

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  • Excel 2010: dynamic update of drop down list based upon datasource validation worksheet changes

    - by hornetbzz
    I have one worksheet for setting up the data sources of multiple data validation lists. in other words, I'm using this worksheet to provide drop down lists to multiple other worksheets. I need to dynamically update all worksheets upon any of a single or several changes on the data source worksheet. I may understand this should come with event macro over the entire workbook. My question is how to achieve this keeping the "OFFSET" formula across the whole workbook ? Thx To support my question, I put the piece of code that I'm trying to get it working : Provided the following informations : I'm using such a formula for a pseudo dynamic update of the drop down lists, for example : =OFFSET(MyDataSourceSheet!$O$2;0;0;COUNTA(MyDataSourceSheet!O:O)-1) I looked into the pearson book event chapter but I'm too noob for this. I understand this macro and implemented it successfully as a test with the drop down list on the same worksheet as the data source. My point is that I don't know how to deploy this over a complete workbook. Macro related to the datasource worksheet : Option Explicit Private Sub Worksheet_Change(ByVal Target As Range) ' Macro to update all worksheets with drop down list referenced upon ' this data source worksheet, base on ref names Dim cell As Range Dim isect As Range Dim vOldValue As Variant, vNewValue As Variant Dim dvLists(1 To 6) As String 'data validation area Dim OneValidationListName As Variant dvLists(1) = "mylist1" dvLists(2) = "mylist2" dvLists(3) = "mylist3" dvLists(4) = "mylist4" dvLists(5) = "mylist5" dvLists(6) = "mylist6" On Error GoTo errorHandler For Each OneValidationListName In dvLists 'Set isect = Application.Intersect(Target, ThisWorkbook.Names("STEP").RefersToRange) Set isect = Application.Intersect(Target, ThisWorkbook.Names(OneValidationListName).RefersToRange) ' If a change occured in the source data sheet If Not isect Is Nothing Then ' Prevent infinite loops Application.EnableEvents = False ' Get previous value of this cell With Target vNewValue = .Value Application.Undo vOldValue = .Value .Value = vNewValue End With ' LOCAL dropdown lists : For every cell with validation For Each cell In Me.UsedRange.SpecialCells(xlCellTypeAllValidation) With cell ' If it has list validation AND the validation formula matches AND the value is the old value If .Validation.Type = 3 And .Validation.Formula1 = "=" & OneValidationListName And .Value = vOldValue Then ' Debug ' MsgBox "Address: " & Target.Address ' Change the cell value cell.Value = vNewValue End If End With Next cell ' Call to other worksheets update macros Call Sheets(5).UpdateDropDownList(vOldValue, vNewValue) ' GoTo NowGetOut Application.EnableEvents = True End If Next OneValidationListName NowGetOut: Application.EnableEvents = True Exit Sub errorHandler: MsgBox "Err " & Err.Number & " : " & Err.Description Resume NowGetOut End Sub Macro UpdateDropDownList related to the destination worksheet : Sub UpdateDropDownList(Optional vOldValue As Variant, Optional vNewValue As Variant) ' Debug MsgBox "Received info for update : " & vNewValue ' For every cell with validation For Each cell In Me.UsedRange.SpecialCells(xlCellTypeAllValidation) With cell ' If it has list validation AND the validation formula matches AND the value is the old value ' If .Validation.Type = 3 And .Value = vOldValue Then If .Validation.Type = 3 And .Value = vOldValue Then ' Change the cell value cell.Value = vNewValue End If End With Next cell End Sub

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  • turn array into object active record can use

    - by stormdrain
    I'm running a query and then decrypting it in the controller. After it is decrypted I was putting the results into an array and sending that to the view. The problem is with this solution I need to rewrite all of my views to parse the arrays sent instead of the active record objects sent before. Is there a way to turn the decrypted array back into an object that will work with existing active record code in the view? Before Controller: $name = $this->Clients_model->getNameData('*','client_id='.$clid,''); $data['name'] = $name; $this->load->view('names/name_view',$data); View: if($name->num_rows()) > 0){ foreach($name->result() as $row){ echo $row->data; [...] Now Controller: $name = $this->Clients_model->getNameData('*','client_id='.$clid,''); $nameArray= array(); foreach ($name->result() as $row){ $x = $row; $keys = array('id','client_id'); $unenc = array(); foreach ($x as $key=>$value){ if(! in_array($key, $keys)){ $unenc[$key]=$this->encrypt->decode($value,$this->e_key); }else{ $unenc[$key]=$value; } } array_push($nameArray,$unenc); } //Creates an object with the data, but doesn't work with CI active record //foreach ($nameArray as $akey => $aval) { // $namea -> {$akey} = $aval; //} //return $data; $data['name'] = $nameArray; $this->load->view('names/name_view',$data); View: if(count($name) > 0){ foreach($name as $key=>$row){ echo $row['data']; [...] In the second (now) controller there is some commented out code that will make an object, but it doesn't behave as expected with active record. Is there a way to take the $nameArray() array and change it into an object that will work with existing view code (such as the code in the 'before:view' above)? Thanks!

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  • How to load jni from sd card on android 2.1?

    - by user263423
    I want to load third-party jni library in runtime. I've tried to load directly from sdcard. It expectedly failed. I've tried to copy library from sdcard to /data/data/app/ and then System.load(/data/data/libjni.so) It works on HTC HERO, but fails on HTC Legend with Android 2.1. it fails during execution of native code and write to log uninformative stack trace Any other way to do it?

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  • Compact Framework : any Finger Friendly GUI ?

    - by guigui42
    i m developing a little tool on my Pocket PC using WM6 SDK but i would like to implement a finger friendly user interface (iphone-like). So i m looking for a free .NET framework that offers the possibility to easily integrate a finger friendly interface for Windows Mobile 6 Pro . Any ideas ? EDIT : Finger friendly means big icons, big buttons , scrollable screens with a simple touch of the thumb... Because the Winforms in Compact framework are made for the stylus, not fingers !!

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  • Javascript data parsing in IE vs other browsers... It seems kinda screwed up. What's the deal?

    - by Carter
    Firstly, when I say other browsers I really only mean Firefox because that's all I tested in. Internet Explorer can parse a date followed by a single character as a proper date. Whereas Firefox behaves as I'd expect. For example... var dateString = new Date("1/1/2010f"); alert(dateString); In IE it will alert... Thu Dec 31 21:00:00 UTC-0900 2009 Whereas in FF is will spit out... "Invalid Date" I first noticed this using the jquery validation plug in. http://docs.jquery.com/Plugins/Validation/Methods/date It seems like it just subtracts some amount of hours off the actual date in IE when a character is appended. I've tested in IE6 and IE8. Am I missing something?

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  • PyGTK: Radiobuttons are still displayed after removal

    - by canavanin
    Hi everyone! I am using PyGTK and the gtk.assistant. On one page I would like to display two radiobuttons in case the user selected a certain option on a previous page. The labels of the buttons - and whether the buttons are to be present at all - are to depend entirely on that earlier selection. Furthermore, if the user goes back and changes that selection, the page containing the radiobuttons is to be updated accordingly. I have got as far as having the radiobuttons displayed when necessary, and with the correct labels. The trouble is that if I go back and change the determining selection, or if I move one page further than the 'radiobutton page' and then move back, the buttons are not only not removed (in case that would have been required), their number has also doubled. To show you what I'm doing, here's part of my code (I've left out bits that do unrelated things, that's why the function name doesn't fit). The function is called when the "prepare" signal is emitted prior to construction of the 'radiobutten page'. def make_class_skills_treestore(self): print self.trained_by_default_hbox.get_children() # PRINT 1 for child in self.trained_by_default_hbox.get_children(): if type(child) == gtk.RadioButton: self.trained_by_default_hbox.remove(child) #child.destroy() # <-- removed the labels, but not the buttons print self.trained_by_default_hbox.get_children() # PRINT 2 class_skills = self.data.data['classes'][selected_class].class_skills.values() default_trained_count = (class_skills.count([True, True]) , class_skills.count([True, False])) num_default_trained_skills = default_trained_count[1] / 2 # you have to pick one of a pair --> don't # count each as trained by default for i in range(default_trained_count[0]): # those are trained by default --> no choice num_default_trained_skills +=1 selected_class = self.get_classes_key_from_class_selection() if default_trained_count[1]: for skill in self.data.data['classes'][selected_class].class_skills.keys(): if self.data.data['classes'][selected_class].class_skills[skill] == [ True, False ] and not self.default_radio: self.default_radio.append(gtk.RadioButton(group=None, label=skill)) elif self.data.data['classes'][selected_class].class_skills[skill] == [ True, False ] and self.default_radio: self.default_radio.append(gtk.RadioButton(group=self.default_radio[0], label=skill)) if self.default_radio: for radio in self.default_radio: self.trained_by_default_hbox.add(radio) self.trained_by_default_hbox.show_all() self.trained_by_default_hbox and self.trained_by_default_label, as well as self.default_radio stem from the above function's class. I have two print statements (PRINT 1 and PRINT 2) in there for debugging. Here's what they give me: PRINT 1: [<gtk.Label object at 0x8fc4c84 (GtkLabel at 0x90a2f20)>, <gtk.RadioButton object at 0x8fc4d4c (GtkRadioButton at 0x90e4018)>, <gtk.RadioButton object at 0x8fc4cac (GtkRadioButton at 0x90ceec0)>] PRINT 2: [<gtk.Label object at 0x8fc4c84 (GtkLabel at 0x90a2f20)>] So the buttons have indeed been removed, yet they still show up on the page. I know the code requires some refactoring, but first I'd like to get it to work at all... If someone could help me out that would be great! Thanks a lot in advance for your replies - any kind of help is highly appreciated.

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  • Which library should I use for server-side image manipulation on Node.JS?

    - by Andrew
    I found a quite large list of available libraries on Node.JS wiki but I'm not sure which of those are more mature and provide better performance. Basically I want to do the following: load some images to a server from external sources put them onto one big canvas crop and mask them a bit apply a filter or two Resize the final image and give a link to it Big plus if the node package works on both Linux and Windows.

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  • .Net Linq - Join together all item of a List

    - by Melursus
    How can I write a Linq expression that select item from a List and join them together ? Example IList<string> data = new List<string>(); data.Add("MyData1"); data.Add("MyData2"); string result = //some linq query... I try data.Select(x => x + ","); //result = "MyData1, MyData2"

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  • Unable to cast object of type 'System.Byte[]' to type 'System.IConvertible'.

    - by alvn.dsza
    i get the error in following code Function ReadFile(ByVal sPath As String) As Byte Dim data As Byte data = Nothing Dim fInfo As FileInfo fInfo = New FileInfo(sPath) Dim numBytes As Long numBytes = fInfo.Length Dim fStream As FileStream fStream = New FileStream(sPath, FileMode.Open, FileAccess.Read) Dim br As BinaryReader br = New BinaryReader(fStream) data = Convert.ToByte(br.ReadBytes(numBytes)) `getting error on this line` Return data End Function

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