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  • strange situation of UITableView when I want to scroll it

    - by ivanlw
    I'm building an easy app for chatting, each time I type in a sentence, the sentences is added into an array(which used to load the table view in cellForRowAtIndexPath delegate method), then I reload the table view. At last I use the following code to scroll the table view to the bottom if ([self.chatList numberOfRowsInSection:0] != 0) { NSUInteger rowCount = [self.chatArray count]; NSIndexPath* indexPath = [NSIndexPath indexPathForRow:rowCount-1 inSection:0]; [self.chatList scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:YES]; } however, the table view sometimes performs well, sometimes only scrolls to the second to the last line……

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  • Make SQL query more efficient

    - by Webnet
    I currently have this query which runs 2 of the exact same sub queries but pull different data. When I make the values comma separated it throws an SQL error saying the sub query can return only one value. Is there anything else I can do to avoid running multiple sub queries? SELECT product_id, ( SELECT COUNT(listing_id) FROM ebay_archive_product_listing_assoc WHERE product_id = product_master.product_id) as listing_count, sku, type_id, ( SELECT AVG(ebay_archive_listing.current_price), AVG(ebay_archive_listing.buy_it_now_price) FROM ebay_archive_listing WHERE id IN ( SELECT listing_id FROM ebay_archive_product_listing_assoc WHERE product_id = product_master.product_id ) AND ebay_archive_listing.start_time >= '.$startTimestamp.' AND ebay_archive_listing.start_time <= '.$endTimestamp.' AND ebay_archive_listing.current_price > 0 ) as average_bid_price, ( SELECT FROM ebay_archive_listing WHERE id IN ( SELECT listing_id FROM ebay_archive_product_listing_assoc WHERE product_id = product_master.product_id ) AND ebay_archive_listing.start_time >= '.$startTimestamp.' AND ebay_archive_listing.start_time <= '.$endTimestamp.' AND ebay_archive_listing.buy_it_now_price > 0 ) as average_buyout_price FROM product_master I'm aware of the syntax error... I'm selecting 2 seperate averages and am wondering if I can do it any simpler way.

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  • How to assign variable dynamically to php list function

    - by ravisoni
    What I am doing that I want to generate a list based on how many items are in an array, so I have counted the items and loop over them, create a number based var and construct a string $var which contains $a1,$a2.... and assigns the $var to list list($var) and tried to access $a1 but it gives me the error "Undefined variable: a1" Is there any other way to do it? Here is my code: $arr = array('1','2','3'); $listsize = count($arr); $var=''; for($i=1;$i<=$listsize;$i++){ $var.='$a'.$i; if($i!=$listsize){ $var.=','; } } list($var) = $arr; echo $a1;

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  • Insert a row and avoiding race condition (PHP/MySQL)

    - by justkevin
    I'm working on a multiplayer game which has a lobby-like area where players select "sectors" to enter. The lobby gateway is powered by PHP, while actual gameplay is handled by one or more Java servers. The datastore is MySQL. The happy path: A player chooses a sector and tells the lobby he'd like to enter. The lobby checks whether this is okay, including checking whether there are too many players in the sector (compares the entry count in sector assignments for that sector against the sector's max_players value). The player is added to the sector_assignments table pairing him with the sector. The player client receives a passkey that will let him connect to the appropriate game server. The race condition: If two players request access to the same sector at close to same time, I can envision a case where they are both added because there was one space free when their check was started and max players gets exceeded. Is the best solution LOCK TABLE on sector_assignments? Is there another option?

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  • Problem with fetching table to array

    - by jasmine
    I have writed this function: function news_array() { $sql = "SELECT * FROM content WHERE home=1"; $query = mysql_query($sql); $i = 0; while($row = mysql_fetch_array($query)){ $row_array[$i] = array( TITLE => $row['title'], ABSTRACTT => $row['abstract'], BODY => $row['body'], ID => $row['conID'] ); $i++; } return $row_array; } When using this function like this: <?php $row_array = news_array(); for($i = 0 ; $i < count($row_array) ; $i++){ echo $row_array[$i][TITLE]; } ?> There no output in html. What is wrong in my function? Thanks in advance

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  • Zend_Form setMultiFile()

    - by Cristian
    Hello everyone, i got a question related to the setMultiFile method of zend_form. I already got a form like this: $foto->setLabel('Foto:'); $foto->addValidator('IsImage', true); $foto->addValidator('Count', true, 12); $foto->addValidator('Extension', true, 'gif,png,jpg'); $foto->setDestination(PUBLIC_PATH.'/upload/img/'); $foto->addFilter('Rename', array( 'target' => PUBLIC_PATH.'/upload/img/', 'overwrite' => true )); $foto->addDecorators(array( array('Description',array('tag'=>'','escape'=>false)) )); And it's everything working...but now i need to iterate each element to set a description and decorators...any suggestions ? Thanks to everyone that will reply to this, i'm drivin crazy with that..

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  • creating a 2 column table dynamically using jquery

    - by user1908568
    I am trying to generate a table dynamically using ajax call. To simplify things i have just added my code to js fiddle here - http://jsfiddle.net/5yLrE/81/ As you click on the button "HI" first two columns are created properly.. but some how as the td length reaches 2 . its not creating another row. The reason is that when i do find on the table elements its actually retrieving the children table elements. Can some one pls help. I want a two column table.. Thank you. sample code: var tr = $("#maintable tbody tr:first"); if(!tr.length || tr.find("td:first").length >= max) { $("#maintable").append("<tr>"); } if(count==0) { $("#maintable tr:last").append("<td>hi"+content+"</td>"); }

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  • Recursive solution to finding patterns

    - by user2997162
    I was solving a problem on recursion which is to count the total number of consecutive 8's in a number. For example: input: 8801 output: 2 input: 801 output: 0 input: 888 output: 3 input: 88088018 output:4 I am unable to figure out the logic of passing the information to the next recursive call about whether the previous digit was an 8. I do not want the code but I need help with the logic. For an iterative solution, I could have used a flag variable, but in recursion how do I do the work which flag variable does in an iterative solution. Also, it is not a part of any assignment. This just came to my mind because I am trying to practice coding using recursion.

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  • How to scramble string C#?

    - by a_Elnajjar
    I write the code to scramble word I am create simple game jumble string jumble = theWord; int length = jumble.Count(); for (int i = 0; i < length; ++i) { int index1 = (rand.Next() % length); int index2 = (rand.Next() % length); char temp =jumble[index1]; jumble = jumble.Replace(jumble[index1], jumble[index2]); jumble = jumble.Replace(jumble[index1], temp); }

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  • Fill data gaps without UNION

    - by Dave Jarvis
    Problem There are data gaps that need to be filled, possibly using PARTITION BY. Query Statement The select statement reads as follows: SELECT count( r.incident_id ) AS incident_tally, r.severity_cd, r.incident_typ_cd FROM report_vw r GROUP BY r.severity_cd, r.incident_typ_cd ORDER BY r.severity_cd, r.incident_typ_cd Code Tables The severity codes and incident type codes are from: severity_vw incident_type_vw Actual Result Data 36 0 ENVIRONMENT 1 1 DISASTER 27 1 ENVIRONMENT 4 2 SAFETY 1 3 SAFETY Required Result Data 36 0 ENVIRONMENT 0 0 DISASTER 0 0 SAFETY 27 1 ENVIRONMENT 0 1 DISASTER 0 1 SAFETY 0 2 ENVIRONMENT 0 2 DISASTER 4 2 SAFETY 0 3 ENVIRONMENT 0 3 DISASTER 1 3 SAFETY Any ideas how to use PARTITION BY (or JOINs) to fill in the zero counts?

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  • Rails Scope for association of 0 size.

    - by MissingHandle
    I'm having trouble figuring out the scope method for all the Foos that have no Bars. That is: class Foo < ActiveRecord::Base has_may :bars end class Bar < ActiveRecord::Base belongs_to :foo end I'd like to write a scope method that returns me all the foos that have no bars. Something like: class Foo < ActiveRecord::Base has_may :bars scope :has_no_bars, includes(:bars).where("COUNT(foo.bars) = 0") end But I don't understand the appropriate syntax. Any help? Happy to use a MetaWhere solution if easier.

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  • Calculating number of online visitors?

    - by Syom
    i need to show the number of online visitors, but there is a problem with selecting algoritm to do it! maybe i must create a table in DB, where i'll store ip addresses of visitors and time of visit! by so i can show the count of ip addresses, which's time = NOW() - 10 minutes, for example...("now()-10 minutes" is just to show the logic, i know that this is not a function:) is this goog way to go? or maybe it's better to use AJAX methods to store the data? please give me an idea. Thanks

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  • PHP - Get values from Array

    - by danit
    I am trying to get a record from a database using an sql lookup (sql1). This then returns as an array which is fine, but I need to use part of the array for my next stage. $opt=get_records_sql($sql1); //Diags for SQL content print_object($opt); $n = count($opt); if (empty($opt)) { echo 'No options selected'; } else { $optno = $opt["subjectid"]; // Diags of $optno echo '<br>$optno = '.$optno; As you can see, I tried to use this: $opt["subjectid"] as subjectid is the fieldname that I am trying to access and I was under the impression that this was correct for accessing an array, but I get the following error: Notice: Undefined index: subjectid Array contents: Array ( [1] => stdClass Object ( [uname] => JHollands06 [tutor] => M LSt [subjectid] => 1 [year] => 2010 [optid] => 1 ) )

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  • Cutting Row with Data and moving to different sheet VBA

    - by user3709645
    I'm trying to cut a row that has the specified cell blank and then paste it into another sheet in the same workbook. My coding works fine to delete the row but everything I've tried to cut and paste keeps giving me errors. Here's the working code that deletes the rows: Sub Remove() 'Remove No Denovo &/or No Peak Seq Dim n As Long Dim nLastRow As Long Dim nFirstRow As Long Dim lastRow As Integer ActiveSheet.UsedRange Set r = ActiveSheet.UsedRange nLastRow = r.rows.Count + r.Row - 1 nFirstRow = r.Row For n = nLastRow To nFirstRow Step -1 If Cells(n, "G") = "" Then Cells(n, "G").EntireRow.Delete Next n End Sub Thanks for any help!

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  • Quiz module as a part of SQL Tutorial (Project) in C#. Help!

    - by N1107
    Kindly help. Am a beginner in C#. The details of my project work include: Front End: C# Back End: SQL MS Visual Studio 2010 Windows Application Quiz Module Each session contains 20 questions. At the end of the test, the test-engine will evaluate the answers. If the student obtains more than 50% then he can unlock the next module. And his test score is printed using Crystal Reports and saved in teacher's database, against that student's record. Else, if his score is less than 50%, the test-engine will count the no. of attempts to clear the quiz & randomly generate another set of 20 questions from a file (from the teacher's database). It's complicated for me cause am a beginner. Would appreciate some help. Thanks.

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  • What the best way to parse and find The specific data

    - by Khemlall Mangal
    Ok i have an issue i want to resolve. I have the following log file, and i want to parse it and find the errors and then compare them to user expected results and if it doesnt match then error or else pass.... the part that i am having trouble with is finding error within the log.... So in this example, within the log starting point is MASTER EXCLUSIONS:[ALL_EXCLUSIONS] errors: Then error can be in two format as show below. what the regular expressssion orcode that i can use to parse this and get pull out these error from count of 1 to end and i will just be able to take the array value for exammple results[1] - compare if == myresults[1] as an exmple.... outputting it in a file is ok too

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  • What is the difference between release and nil

    - by HML
    I am new to iPhone SDK. I want to know that what is difference between release and nil. Yes, basic, I know. But my application crashing every time when I use release. If I use nil then its working fine. Here is code : cellName=[cellArray objectAtIndex:5]; UITextField *txtFieldTown = (UITextField *)[cellName.contentView viewWithTag:2]; StrTown=txtFieldTown.text; [txtFieldTown release]; txtFieldTown = nil; Here, if release line is removed, then its working fine. I know that I am not allocating txtFieldTown,so I should not worry but its retain count is 4. So I am trying to decrease that. Please help me.Thanking you...

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  • bashscript for file search and replace!

    - by D3orn
    Hey I try to write a littel bash script. This should copy a dir and all files in it. Then it should search each file and dir in this copied dir for a String (e.g @ForTestingOnly) and then this save the line number. Then it should go on and count each { and } as soon as the number is equals it should save againg the line number. = it should delete all the lines between this 2 numbers. I'm trying to make a script which searchs for all this annotations and then delete the method which is directly after this ano. Thx for help...

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  • Rails 3 many-to-many query on includes or joins

    - by Myat
    I have three models User, Activity and ActivityRecord. class User < ActiveRecord::Base # Include default devise modules. Others available are: # :token_authenticatable, :confirmable, # :lockable, :timeoutable and :omniauthable devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable # Setup accessible (or protected) attributes for your model attr_accessible :first_name, :last_name, :email, :gender, :password, :password_confirmation, :remember_me # attr_accessible :title, :body has_many :activities has_many :activity_records , :through=> :activities end class Activity < ActiveRecord::Base attr_accessible :point, :title belongs_to :user has_many :activity_records end class ActivityRecord < ActiveRecord::Base attr_accessible :activity_id belongs_to :activity scope :today, lambda { where("DATE(#{'activity_records'}.created_at) = '#{Date.today.to_s(:db)}'")} end I would like to query all activities for a user together with the count for their respective activity records for today. For example, after querying and converting to json format, I would like to have something like below [ { id: 23 title: "jogging", point: "5", today_activity_records_count: 1, }, { id: 12 title: "diet dinner", point: "2", today_activity_records_count: 0, }, ] Please kindly guide me how I can achieve that. Thanks

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  • Regroup element with jquery

    - by kennygunie
    Hi, I have a number of messages on my page like this: <div class="messages">A</div> <div class="messages">B</div> <div class="messages">A</div> <div class="messages">C</div> is there any way with jQuery (no PHP) to count and regroup 2 div A like this: <div class="messages">A</div><span>2</span> <div class="messages">B</div> <div class="messages">C</div> Thank you.

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  • String manipulation appears to be inefficient

    - by user2964780
    I think my code is too inefficient. I'm guessing it has something to do with using strings, though I'm unsure. Here is the code: genome = FASTAdata[1] genomeLength = len(genome); # Hash table holding all the k-mers we will come across kmers = dict() # We go through all the possible k-mers by index for outer in range (0, genomeLength-1): for inner in range (outer+2, outer+22): substring = genome[outer:inner] if substring in kmers: # if we already have this substring on record, increase its value (count of num of appearances) by 1 kmers[substring] += 1 else: kmers[substring] = 1 # otherwise record that it's here once This is to search through all substrings of length at most 20. Now this code seems to take pretty forever and never terminate, so something has to be wrong here. Is using [:] on strings causing the huge overhead? And if so, what can I replace it with? And for clarity the file in question is nearly 200mb, so pretty big.

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  • in c++ what is bettr to delete poiner or set it with new value?

    - by user63898
    Hi simple question in c++ , say i have a loop and i have function that returns pointer to item so i have to define inner loop pointer so my question is what to do with the pointer inside the loop , delete it ? or to set it with new value is good for example: for(int i =0;i<count();i++) { ptrTmp* ptr = getItemPtr(); // do somthing with the ptr ... // what to do here ? to delete the poinetr or not? delete ptr; // ?? }

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  • Codeigniter Active record help

    - by sea_1987
    Hello, I am trying to increment a INT column by 1 if a certain field is not null on an update request, currently I have this update too columns, public function updateCronDetails($transaction_reference, $flag, $log) { $data = array ( 'flag' => $flag, 'log' => "$log" ); $this->db->where('transaction_reference', $transaction_reference); $this->db->update('sy_cron', $data); } What I need to know is how I can check if the value being sent to the log field is NULL and if it is how could I increment a column called count by 1?

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  • appending and reading text file

    - by Rod
    Environment: Any .Net Framework welcomed. I have a log file that gets written to 24/7. I am trying to create an application that will read the log file and process the data. What's the best way to read the log file efficiently? I imagine monitoring the file with something like FileSystemWatcher. But how do I make sure I don't read the same data once it's been processed by my application? Or say the application aborts for some unknown reason, how would it pick up where it left off last? There's usually a header and footer around the payload that's in the log file. Maybe an id field in the content as well. Not sure yet though about the id field being there. I also imagined maybe saving the lines read count somewhere to maybe use that as bookmark.

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  • MySQL query to find the most popular value in a column joined by another value in a second table

    - by Budove
    I have two tables: users: user_id, user_zip settings: user_id, pref_ex_loc I need to find the single most popular 'pref_ex_loc' from the settings table based on a particular user_zip, which will be specified as the variable $userzip. Here is the query that I have now and obviously it doesn't work. $popularexloc = "SELECT pref_ex_loc, user_id COUNT(pref_ex_loc) AS countloc FROM settings FULL OUTER JOIN users ON settings.user_id = users.user_id WHERE users.user_zip='$userzip' GROUP BY settings.pref_ex_loc ORDER BY countloc LIMIT 1"; $popexloc = mysql_query($popularexloc) or die('SQL Error :: '.mysql_error()); $exlocrow = mysql_fetch_array($popexloc); $mostpopexloc=$exlocrow[0]; echo '<option value="'.$mostpopexloc.'">'.$mostpopexloc.'</option>'; What am I doing wrong here? I'm not getting any kind of error from this either.

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