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• A loop (while/foreach) with "offset" wrapping and

  - by DarkGhostHunter

  After applying what wrapping objects using math operator, I just tought it will be over. But no. By far. <?php $faces= array( 1 => '<div class="block">happy</div>', 2 => '<div class="block">sad</div>', (sic) 21 => '<div class="block">angry</div>' ); $i = 1; foreach ($faces as $face) { echo $face; if ($i == 3) echo '<div class="block">This is and ad</div>'; if ($i % 3 == 0) { echo "<br />"; // or some other wrapping thing } $i++; } ?> In the code I have to put and ad after the second one, becoming by that the third object. And then wrap the three all in a <div class="row"> (a br after won't work out by design reasons). I thought I will going back to applying a switch, but if somebody put more elements in the array that the switch can properly wrap, the last two remaining elements are wrapped openly. Can i add the "ad" to the array in the third position? That would make things simplier, only leaving me with guessing how to wrap the first and the third, the fourth and the sixth, an so on.

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• Dynamically changing layout

  - by LTMOD

  I have a 2 x 2 grid of buttons. Each row of 2 is wrapped in a horizontal linear layout. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="100dip"> <Button android:layout_weight=".5" android:id="@+id/btn1" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_gravity="center_vertical|center_horizontal" android:padding="5dip" android:layout_margin="2dip"> </Button> <Button android:layout_weight=".5" android:id="@+id/btn2" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="5dip" android:layout_margin="2dip"> </Button> At times I want to show all 4 buttons, and other times, I show the top 2 only, and sometimes, I need to show 2 on top, and one on the bottom. I would like to center the bottom one, but can't seem to accomplish this. In my code, I call btn4.setVisibility(8); //8 = GONE, which makes my 4th button disappear, but then btn3 ends up filling the entire layout. What I would like it to do instead is center itself within the layout at its correct width / height. I'm a bit new to this, so any help is greatly appreciated. Thanks in advance!

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• Multisite Enabling a Table

  - by Joe Fitzgibbons

  I am creating a table (table A) that will have a number of columns(of course) and there will be another table (table B) that holds metadata associated to rows in table A. I am working with a multi site implementation that has one database for the whole shabang. Rows in table A could belong to any number of sites but must belong to at least one. The problem I have is I am not sure what the best practice is for defining what site each row in table A belongs to. I want performance and scalability. There is no finite number of sites going forward. Rows in table A could belong to any number of sites in the future. Right now there are only 3. My initial thoughts are to have a primary site ID in Table A and then metadata in table B will have rows defining additional sites as needed. Another thought is to have a column in Table A for each site and it is a boolean as to wether it belongs to that site. Lastly I have thought about having another table to map rows in Table A to each site. What is the best way to associate rows in a table with any number of sites with performance and scalability in mind?

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• Why do I get 'Connection refused - connect(2)' for some models?

  - by Will

  I have a rails application running for the past 90 days that suddenly stopped working. Debugging the problem I found that I can read from the DB but not write to it. At least for certain models. There is one model that I can save whereas all others return Connection refused - connect(2) when I attempt to save them. They all used to work fine last month. I have no idea how to determine what the problem may be. Unfortunately I do not have access to the actual server remotely right now so I am limited in my debugging ability. I was able to get some non-tech people to run simple commands though that may help identify my problem. I will also be getting access tomorrow at some point. 1 Check from the console ./script/console >> a = Post.last.clone => #<Post id: nil, title: "test"... >> a.ex_id = 7 >> a.save Connection refused - connect(2) ... ... >> b = Story.last.console => #<Story id: nil, title: "test"... >> a.ex_id = 7 >> a.save => true I am not sure why this works for story and not post. This is consistent over many tests. 2 Check from mysql ./script/dbconsole -p mysql> INSERT INTO Posts (`title`,`body`, `ex_id`) SELECT `title`, `body`, 7 FROM Posts WHERE ID = 1; Query OK, 1 row affected (0.01 sec) Records: 1 Duplicates: 0 Warnings: 0 And as you can see I am able to write to the table with the same credientials that Rails uses? Does anyone know why I get connection refused in the console?

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• Using data.table to aggregate

  - by dayne

  After multiple suggestions from SO users, I am finally trying to convert my code over to using data.tables. library(data.table) DT <- data.table(plate = paste0("plate",rep(1:2,each=5)), id = rep(c("CTRL","CTRL","ID1","ID2","ID3"),2), val = 1:10) > DT plate id val 1: plate1 CTRL 1 2: plate1 CTRL 2 3: plate1 ID1 3 4: plate1 ID2 4 5: plate1 ID3 5 6: plate2 CTRL 6 7: plate2 CTRL 7 8: plate2 ID1 8 9: plate2 ID2 9 10: plate2 ID3 10 What I would like to do is take the average of DT[,val] by plate when the id is "CTRL". I would normally aggregate the data frame, then use match to map the values back to a new column, 'ctrl'. Using the data.table package I can get: DT[id=="CTRL",ctrl:=mean(val),by=plate] > DT plate id val ctrl 1: plate1 CTRL 1 1.5 2: plate1 CTRL 2 1.5 3: plate1 ID1 3 NA 4: plate1 ID2 4 NA 5: plate1 ID3 5 NA 6: plate2 CTRL 6 6.5 7: plate2 CTRL 7 6.5 8: plate2 ID1 8 NA 9: plate2 ID2 9 NA 10: plate2 ID3 10 NA What I need is really: DT <- data.table(plate = paste0("plate",rep(1:2,each=5)), id = rep(c("CTRL","CTRL","ID1","ID2","ID3"),2), val = 1:10, ctrl = rep(c(1.5,6.5),each=5)) > DT plate id val ctrl 1: plate1 CTRL 1 1.5 2: plate1 CTRL 2 1.5 3: plate1 ID1 3 1.5 4: plate1 ID2 4 1.5 5: plate1 ID3 5 1.5 6: plate2 CTRL 6 6.5 7: plate2 CTRL 7 6.5 8: plate2 ID1 8 6.5 9: plate2 ID2 9 6.5 10: plate2 ID3 10 6.5 Eventually I would like to use much more complicated selections of the values, but I do not know how to select specific values, run some function, then map those values back to the appropriate row using data frames.

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• Performing a MYSQL query based off of $_GET results

  - by Michael N

  When a user clicks an item on my items page, it takes them to blank page template using $_GET to pass the item brand and model through. I'd like to perform another MYSQL query when that user clicks through to populate the blank page with the product details from my database. I'd like to retrieve the single row using the model number (unique ID) to populate the page with the information. I've tried a couple of things but am having a little difficulty. On my blank item page, I have $brand = $_GET['Brand']; $modelnumber = $_GET['ModelNumber']; $query = mysql_query("SELECT * FROM items WHERE `Model Number` = '$modelnumber'"); $results = mysql_fetch_row($query); echo $results; I think having ''s around Model Number is causing troubles, but without them, I get a Warning: mysql_fetch_row() expects parameter 1 to be resource, boolean given error. My database columns looks like Brand | Model Number | Price | Description | Image A few other things I have tried include $query = mysql_query("SELECT * FROM item WHERE Model Number = $_GET['ModelNumber']"); Which gave me a syntax error. I've also tried concatenating the $_GET which gives me a mysql_fetch_row() expects parameter 1 to be resource, boolean given error Which leads me to believe that I'm also going about displaying the results incorrectly. I'm not sure if I need to put it in a where loop like I have with my previous page which displays all items in the database because this is just displaying one.

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• Make div expand only horizontally when more floating divs are added to it

  - by Wesam

  I am trying to make a div that contains other floating divs to adjust its width such that adding more floating divs (dynamically using jQuery) will only expand the div in its width, not allowing the floating divs to create a new line. Therefore, I want to fix this issue such that each div with class grid-row only expands in width, and so I will be able to scroll using the overflow: scroll for the parent grid div. I have searched a lot for answers, and it seems that it is a famous issue. However, non of the answer solved my problem. I am currently doing this: <div id="grid_container"> <div id="grid"> <div class="grid_row"> <div class="module" id="experience"> Experience </div> <div class="header"> Google </div> <div class="header"> Microsoft </div> </div> <div class="grid_row"> </div> </div> </div> CSS: body { } #grid_container { margin: 50px auto; width: 500px; height: 500px; padding: 10px; border: black solid 1px; } #grid { overflow:scroll; height: 100%; } .grid_row { clear: both; height: 50px; } .module, .header{ padding: 10px; float: left; border: gray solid 1px; }

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• PHP function to handle most database queries has a problem with results. I am getting the right numb

  - by asdasds

  Here is my little function. It does not handle the results correctly. I do get all the rows that I want, but all the rows of the $results array contain the exact same values. So i make 2 arrays, a temporary array to hold the values after each fetch, and another array to hold all the temporary arrays. First i take the temp array and map its keys to the column names. Then i give it to bind_result, and call fetch() and use it like I would any other result value. Could this be because I re-use the $results array? numresults is the number of values you are taking from each row. if 0, you are not getting any results back. function db_query($db, $query, $params = NULL, $numresults = 0) { if($stmt = $db -> prepare($query)) { if($params != NULL) { call_user_func_array(array($stmt, 'bind_param'), $params); } if(!$stmt -> execute()) { //echo 'exec error:',$db->error; return false; } if($numresults > 0) { $results = array(); $tmpresult = array(); $meta = $stmt->result_metadata(); while ($columnName = $meta->fetch_field()) $tmpresult[] = &$results[$columnName->name]; call_user_func_array(array($stmt, 'bind_result'), $tmpresult); $meta->close(); $results = array(); while($stmt -> fetch()) $results[] = $tmpresult; } $stmt -> close(); } else { //echo 'prepare error: ',$db->error; return false; } if($numresults == 0) return true; return $results; }

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• Is it a bad practice to use divs for styling purposes?

  - by caisah

  I've seen lately a lot of discussions about this new concept called oocss and I was wondering if it is a bad practice to wrap your main tags in divs only for styling/page layout purposes. I'm asking this because I see some frameworks like Twitter Bootstrap use such a method. What are the implications of such a markup from a semantic and accessibility point of view? For example: <div class="container"> <div class="row"> <div class="span4"> <nav class="nav">...</nav> </div> <div class="span8"> <a href="#" class="btn btn-large">...</a> </div> </div> </div> instead of <div class="menu"> <nav class="nav">...</nav> <a href="#" class="bttn">...</a> </div>

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• How to open multiple socket connections and do callbacks in PHP

  - by Click Upvote

  I'm writing some code which processes a queue of items. The way it works is this: Get the next item flagged as needing to be processed from the mysql database row. Request some info from a google API using Curl, wait until the info is returned. Do the remainder of the processing based on the info returned. Flag the item as processed in the db, move onto the next item. The problem is that on step # 2. Google sometimes takes 10-15 seconds to return the requested info, during this time my script has to remain halted and wait. I'm wondering if I could change the code to do the following instead: Get the next 5 items to be processed as usual. Request info for items 1-5 from google, one after the other. When the info for item 1 is returned, a 'callback' should be done which calls up a function or otherwise calls some code which then does the remainder of the processing on items 1-5. And then the script starts over until all pending items in db are marked processed. How can something like this be achieved?

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• How can I load a div in rails in response to clicks on another div?

  - by mmr

  I'm very new to Rails (and web) programming, so I'm not even sure what technology I should be looking for for this. I've downloaded and run through the first five chapters of the Rails tutorial, but now have a very simple request. On the left hand side of a web page, I will have a table. If the user clicks on an element in that table, I want to have the right hand side of the page show something new. I already have a page to display the table, viz: <div class="center hero-unit"> <div class="container"> <h2>2012 Yearly Report</h2> <div class="row-fluid"> <div class="span12"> <div class="span4"> <table border="1"> </table> </div> <div class="span6"> <!-- load stuff here based on what someone clicks on in the table --> </div> </div> </div> </div> </div> And I'm using bootstrap layouts to display everything. I just don't understand how to change the contents of the 'span6' div based on user behavior in 'span4'.

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• Is my approach for persistent login secure ?

  - by Jay

  I'm very much stuck with the reasonable secure approach to implement 'Remember me' feature in a login system. Here's my approach so far, Please advice me if it makes sense and is reasonably secure: Logging: User provides email and password to login (both are valid).. Get the user_id from DB Table Users by comparing provided email Generate 2 random numbers hashed strings: key1, key2 and store in cookies. In DB Table COOKIES, store key1, key2 along with user_id. To Check login: If key1 and key2 both cookies exist, validate both keys in DB Table COOKIES (if a row with key1, and key2 exists, user is logged). if cookie is valid, regenrate key2 and update it in cookie and also database. Why re-genrating key: Because if someone steals cookie and login with that cookie, it will be working only until the real user login. When the real user will login, the stolen cookie will become invalid. Right? Why do I need 2 keys: Because if i store user_id and single key in cookie and database, and the user want to remember the password on another browser, or computer, then the new key will be updated in database, so the user's cookie in earlier browser/PC will become invalid. User wont be able to remember password on more than one place. Thanks for your opinions.

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• Foreign-key-like merge in R

  - by skyl

  I'm merging a bunch of csv with 1 row per id/pk/seqn. > full = merge(demo, lab13am, by="seqn", all=TRUE) > full = merge(full, cdq, by="seqn", all=TRUE) > full = merge(full, mcq, by="seqn", all=TRUE) > full = merge(full, cfq, by="seqn", all=TRUE) > full = merge(full, diq, by="seqn", all=TRUE) > print(length(full$ridageyr)) [1] 9965 > print(summary(full$ridageyr)) Min. 1st Qu. Median Mean 3rd Qu. Max. 0.00 11.00 19.00 29.73 48.00 85.00 Everything is great. But, I have another file which has multiple rows per id like: "seqn","rxd030","rxd240b","nhcode","rxq250" 56,2,"","",NA,NA,"" 57,1,"ACETAMINOPHEN","01200",2 57,1,"BUDESONIDE","08800",1 58,1,"99999","",NA 57 has two rows. So, if I naively try to merge this file, I have a ton more rows and my data gets all skewed up. > full = merge(full, rxq, by="seqn", all=TRUE) > print(length(full$ridageyr)) [1] 15643 > print(summary(full$ridageyr)) Min. 1st Qu. Median Mean 3rd Qu. Max. 0.00 14.00 41.00 40.28 66.00 85.00 Is there a normal idiomatic way to deal with data like this? Suppose I want a way to make a simple model like MYSPECIAL_FACTOR <- somehow() glm(MYSPECIAL_FACTOR ~ full$ridageyr, family=binomial) where MYSPECIAL_FACTOR is, say, whether or not rxd240b == "ACETAMINOPHEN" for the observations which are unique by seqn. You can reproduce by running the first bit of this.

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• iphone xcode sqlite3_open remote host

  - by cicana

  Hi, i try to get a connection my server, with the sqlite3_open command! my question...is it possible to that? i got the following code... // Get the path to the documents directory and append the databaseName databaseName = @"AnimalDatabase.sql"; NSString *serverpath = @"http://localhost/app/"; databasePath = [serverpath stringByAppendingPathComponent:databaseName]; and then this here -(void) readAnimalsFromDatabase { // Setup the database object sqlite3 *database; // Init the animals Array animals = [[NSMutableArray alloc] init]; // Open the database from the users filessytem if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK) { // Setup the SQL Statement and compile it for faster access const char *sqlStatement = "select * from animals"; sqlite3_stmt *compiledStatement; if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) { // Loop through the results and add them to the feeds array while(sqlite3_step(compiledStatement) == SQLITE_ROW) { // Read the data from the result row NSString *aName = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)]; NSString *aDescription = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 2)]; NSString *aImageUrl = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 3)]; // Create a new animal object with the data from the database Animal *animal = [[Animal alloc] initWithName:aName description:aDescription url:aImageUrl]; // Add the animal object to the animals Array [animals addObject:animal]; [animal release]; } } // Release the compiled statement from memory sqlite3_finalize(compiledStatement); } sqlite3_close(database); } any suggestion??

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• php mysql_fetch_array() error

  - by user1877823

  I am getting this error while i am trying to delete a record the query is working but this line remains on the page. i want to echo "Deleted" written in the while should show up but the while loop is not working, i have tried and searched alot nothing helps! mysql_fetch_array() expects parameter 1 to be resource, boolean given in delete.php on line 27 delete.php <html> <body> <form method="post"> Id : <input type="text" name="id"> Name : <input type="text" name="name"> Description : <input type="text" name="des"> <input type="submit" value="delete" name="delete"> </form> <?php include("connect.php"); $id = $_POST['id']; $name = $_POST['name']; $des = $_POST['des']; $result = mysql_query("DELETE FROM fact WHERE id='$id'") or die(mysql_error()); while($row = mysql_fetch_array($result)) { echo "Deleted"; } mysql_close($con); ?> </body> </html> connect.php <?php $con = mysql_connect("localhost","root",""); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("Dataentry", $con); ?> How should i make the while loop work..

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• mcsCustomscrollbar append new content not working

  - by Dariel Pratama

  i have this script in my website. $(document).ready(function(){ var comment = $('textarea[name=comment_text]').val(); var vid = $('input[name=video_id]').val(); $('#add_comment').on('click', function(){ $.post('<?php echo site_url('comment/addcomments'); ?>', $('#comment-form').serialize(), function(data){ data = JSON.parse(data); if(data.userdata){ var date = new Date(data.userdata.comment_create_time * 1000); var picture = data.userdata.user_image.length > 0 ? 'fileupload/'+data.userdata.user_image:'images/no_pic.gif'; var newComment = '<div class="row">\ <div class="col-md-4">\ <img src="<?php echo base_url(); ?>'+picture+'" class="profile-pic margin-top-15" />\ </div>\ <div class="col-md-8 no-pade">\ <p id="comment-user" class="margin-top-15">'+data.userdata.user_firstname+' '+data.userdata.user_lastname+'</p>\ <p id="comment-time">'+date.getTime()+'</p>\ </div>\ <div class="clearfix"></div>\ <div class="col-md-12 margin-top-15" id="comment-text">'+data.userdata.comment_text +'</div>\ <div class="col-md-12">\ <div class="hr-grey margin-top-15"></div>\ </div>\ </div>'; $('#comment-scroll').append($(newComment)); $('#comment').modal('hide'); } }); }); }); what i expect when a comment added to the DB and the PHP page give JSON response, the new comment will be added to the last line of $('#comment-scroll'). #comment-scroll is also have custom scroll bar by mcsCustomscrollbar. the above script also hiding the modal dialog when comment saved and it's working fine which is mean data.userdata is not empty, but why the append() isnt?

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• Javascript in php

  - by user506539

  I have a form where user enters category, it gets inserted into db and it has to go to other page to select an image, after selection image id has to get into category table. I am doing some thing like this <?php error_reporting(E_ALL ^ E_NOTICE); $con = mysql_connect("localhost","root",""); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("mydocair", $con); $ThirdPartyCategoryName =$_POST['ThirdPartyCategoryName']; $checkformembers = mysql_query("SELECT * FROM thirdpartycategorymaster WHERE ThirdPartyCategoryName = '$ThirdPartyCategoryName'"); if(mysql_num_rows($checkformembers) != 0) { header('location:newcat.php?msg=category exists'); } else { $sql="INSERT INTO thirdpartycategorymaster (ThirdPartyCategoryID, ThirdPartyCategoryName) VALUES ('$_POST[ThirdPartyCategoryID]', '$_POST[ThirdPartyCategoryName]' )"; } if (!mysql_query($sql,$con)) { die('Error: ' . mysql_error()); } mysql_close($con); ?> <?php $res = mysql_query("SELECT ThirdPartyCategoryID FROM thirdpartycategorymaster"); while($row = mysql_fetch_array($res)) { "<script type='text/javascript'> if(window.confirm("Do you want to insert image for category?")) { document.location = "imgcat.php?id="<?php echo row2['ThirdPartyCategoryID']; ?>"" } </script>"; } ?>

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• PHP & MySQL delete image link problem

  - by IMAGE

  I'm trying to create a delete image link if the image is present and when the user clicks the delete image link it should delete the image. But for some reason this is not working can someone help me fix the delete image link problem? Thanks! Here is the PHP code. if (isset($_POST['delete_image'])) { $img_dir = "../members/" . $user_id . "/images/thumbs/"; $img_thmb = "../members/" . $user_id . "/images/"; $image_name = $row['image']; if(file_exists($img_dir . $image_name)){ if(unlink($img_dir.$image_name) && unlink($img_thmb.$image_name)){ $mysqli = mysqli_connect("localhost", "root", "", "sitename"); $dbc = mysqli_query($mysqli, "DELETE FROM users* WHERE image_id = '.$image_id.' AND user_id = '$user_id'"); }else{ echo '<p class="error">Sorry unable to delete image file!</p>'; } } } if(isset($_POST['image']) || !empty($image)) { echo '<a href="'. $_POST['delete_image'] .'">Delete Image</a>'; }

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• SQL Trigger Need to set x from a value

  - by Eric

  Im stuck on a the type of trigger needed to for this constraint. I will have a price and a commission. The price determines the commission amount, < 100 - 4%, < 200 - 5% etc. My idea. the database contains a separate table that will hold 4 price values , 101, 201, 401, 601, with their own matching comission %, this will be called PC. When i create a property listing i want to calculate the commission they earn depending on the price entered. on insert, i need to check the new.price and compare it to the prices in PC. Once new.price is less than the price tuple, i set the price to that commission value create or replace TRIGGER findCommission BEFORE INSERT OR UPDATE ON HASLISTING FOR each ROW BEGIN IF (:NEW.ASKING_PRICE < 100001) THEN :NEW.COMMISSION = 6.0; END IF; IF (:NEW.ASKING_PRICE < 250001) THEN :NEW.COMMISSION = 5.5; END IF; IF (:NEW.ASKING_PRICE < 1000001) THEN :NEW.COMMISSION = 5.0; END IF; IF (:NEW.ASKING_PRICE > 1000000) THEN :NEW.COMMISSION = 4.0; END IF; END;

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• Categorize data without consolidating?

  - by sqlnoob

  I have a table with about 1000 records and 2000 columns. What I want to do is categorize each row such that all records with equal column values for all columns except 'ID' are given a category ID. My final answer would look like: ID A B C ..... Category ID 1 1 0 3 1 2 2 1 3 2 3 1 0 3 1 4 2 1 3 2 5 4 5 6 3 6 4 5 6 3 where all columns (besides ID) are equal for IDs 1,3 so they get the same category ID and so on. I guess my thought was to just write a SQL query that does a group by on every single column besides 'ID' and assign a number to each group and then join back to my original table. My current input is a text file, and I have SAS, MS Access, and Excel to work with. (I could use proc sql from within SAS). Before I go this route and construct the whole query, I was just wondering if there was a better way to do this? It will take some work just to write the query, and I'm not even sure if it is practical to join on 2000 columns (never tried), so I thought I'd ask for ideas before I got too far down the wrong path. EDIT: I just realized my title doesn't really make sense. What I was originally thinking was "Is there a way I can group by and categorize at the same time without actually consolidating into groups?"

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• Is it possible to submit data into a SQL database, wait for that to finish, and then return the ID g

  - by user322478

  I have an ASP form that needs to submit data to two different systems. First the data needs to go into an MS SQL database, which will get an ID. I then need to submit all that form data to an external system, along with that ID. Pretty much everything in the code works just fine, the data goes into the database, and the data will go to the external system. The problem is I am not getting my ID back from SQL when I execute that query. I am under the impression this is happening because of how fast everything occurs in the code. The database is adding it's row at the same time my post page runs it's query to get the ID back, I think. I need to know of a way to wait until SQL finished the insert or wait for a specific amount of time maybe. I already tried using the hacks to "sleep" with ASP, that did not help. I am sure I could accomplish this in .Net, my background is more .Net than ASP, but this is what I have to work with on my current project. Any ideas?

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• find the difference between two very large list

  - by user157195

  I have two large list(could be a hundred million items), the source of each list can be either from a database table or a flat file. both lists are of comparable sizes, both unsorted. I need to find the difference between them. so I have 3 scenarios: 1. List1 is a database table(assume each row simply have one item(key) that is a string), List2 is a large file. 2. Both lists are from 2 db tables. 3. both lists are from two files. in case 2, I plan to use: select a.item from MyTable a where a.item not in (select b.item form MyTable b) this clearly is inefficient, is there a better way? Another approach is: I plan to sort each list, and then walk down both of them to find the diff. If the list is from a file, I have to read it into a db table first, then use db sorting to output the list. Is the run time complexity still O(nlogn) in db sorting? either approach is a pain and seems would be very slow when the list involved has hundreds of millions of items. any suggestions?

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• Calling a constructor from method within the same class

  - by Nathan

  I'm new to java and I'm learning about creating object classes. One of my homework assignment requires that I call the constructor at least once within a method of the same object class. I'm getting an error that says The method DoubleMatrix(double[][]) is undefined for the type DoubleMatrix Here's my constructor: public DoubleMatrix(double[][] tempArray) { // Declaration int flag = 0; int cnt; // Statement // check to see if doubArray isn't null and has more than 0 rows if(tempArray == null || tempArray.length < 0) { flag++; } // check to see if each row has the same length if(flag == 0) { for(cnt = 0; cnt <= tempArray.length - 1 || flag != 1; cnt++) { if(tempArray[cnt + 1].length != tempArray[0].length) { flag++; } } } else if(flag == 1) { makeDoubMatrix(1, 1);// call makeDoubMatrix method } }// end constructor 2 Here's the method where I try and call the constructor: public double[][] addMatrix(double[][] tempDoub) { // Declaration double[][] newMatrix; int rCnt, cCnt; //Statement // checking to see if both are of same dimension if(doubMatrix.length == tempDoub.length && doubMatrix[0].length == tempDoub[0].length) { newMatrix = new double[doubMatrix.length][doubMatrix[0].length]; // for loop to add matrix to a new one for(rCnt = 0; rCnt <= doubMatrix.length; rCnt++) { for(cCnt = 0; cCnt <= doubMatrix.length; cCnt++) { newMatrix[rCnt][cCnt] = doubMatrix[rCnt][cCnt] + tempDoub[rCnt][cCnt]; } } } else { newMatrix = new double[0][0]; DoubleMatrix(newMatrix) } return newMatrix; }// end addMatrix method Can someone point me to the right direction and explain why I'm getting an error?

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• NSUTF8StringEncoding gives me this %0A%20%20%20%20%22http://example.com/example.jpg%22%0A

  - by user1530141

  So I'm trying to load pictures from twitter. If i just use the URL in the json results without encoding, in the dataWithContentsOfURL, I get nil URL argument. If I encode it, I get %0A%20%20%20%20%22http://example.com/example.jpg%22%0A. I know I can use rangeOfString: or stringByReplacingOccurrencesOfString: but can I be sure that it will always be the same, is there another way to handle this, and why is this happening to my twitter response and not my instagram response? i have also tried stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet] and it does nothing. this is the url directly from the json... 2013-11-08 22:09:31:812 JaVu[1839:1547] -[SingleEventTableViewController tableView:cellForRowAtIndexPath:] [Line 406] ( "http://pbs.twimg.com/media/BYWHiq1IYAAwSCR.jpg" ) here is my code if ([post valueForKeyPath:@"entities.media.media_url"]) { NSString *twitterString = [[NSString stringWithFormat:@"%@", [post valueForKeyPath:@"entities.media.media_url"]]stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; twitterString = [twitterString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; NSLog(@"%@", twitterString); if (twitterString != nil){ NSURL *twitterPhotoUrl = [NSURL URLWithString:twitterString]; NSLog(@"%@", twitterPhotoUrl); dispatch_queue_t queue = kBgQueue; dispatch_async(queue, ^{ NSError *error; NSData* data = [NSData dataWithContentsOfURL:twitterPhotoUrl options:NSDataReadingUncached error:&error]; UIImage *image = [UIImage imageWithData:data]; dispatch_sync(dispatch_get_main_queue(), ^{ [streamPhotoArray replaceObjectAtIndex:indexPath.row withObject:image]; cell.instagramPhoto.image = image; }); }); } }

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• Java Spotlight Episode 108: Patrick Curran and Heather VanCura on JCP.Next @jcp_org

  - by Roger Brinkley

  Interview with Patrick Curran and Heather VanCura on JCP.Next. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link:  Java Spotlight Podcast in iTunes. Show Notes News Welcome to the newly merged JCP EC! The November/December issue of Java Magazine is now out Red Hat announces intent to contribute to OpenJFX New OpenJDK JEPs: JEP 168: Network Discovery of Manageable Java Processes JEP 169: Value Objects Java EE 7 Survey Latest Java EE 7 Status GlassFish 4.0 Embedded (via @agoncal) Events Nov 13-17, Devoxx, Antwerp, Belgium Nov 20, JCP Public Meeting (see details below) Nov 20-22, DOAG 2012, Nuremberg, Germany Dec 3-5, jDays, Göteborg, Sweden Dec 4-6, JavaOne Latin America, Sao Paolo, Brazil Dec 14-15, IndicThreads, Pune, India Feature InterviewPatrick Curran is Chair of the Java Community Process organization. In this role he oversees the activities of the JCP's Program Management Office including evolving the process and the organization, managing its membership, guiding specification leads and experts through the process, chairing Executive Committee meetings, and managing the JCP.org web site.Patrick has worked in the software industry for more than 25 years, and at Sun and then Oracle for 20 years. He has a long-standing record in conformance testing, and before joining the JCP he led the Java Conformance Engineering team in Sun's Client Software Group. He was also chair of Sun's Conformance Council, which was responsible for defining Sun's policies and strategies around Java conformance and compatibility.Patrick has participated actively in several consortia and communities including the W3C (as a member of the Quality Assurance Working Group and co-chair of the Quality Assurance Interest Group), and OASIS (as co-chair of the Test Assertions Guidelines Technical Committee). Patrick's blog is here.Heather VanCura manages the JCP Program Office and is responsible for the day-to-day nurturing, support, and leadership of the community. She oversees the JCP.org web site, JSR management and posting, community building, events, marketing, communications, and growth of the membership through new members and renewals.  Heather has a front row seat for studying trends within the community and recommending changes. Several changes to the program in recent years have included enabling broader participation, increased transparency and agility in JSR development.  When Heather joined the PMO staff in a community building marketing manager role for the JCP program, she was responsible for establishing the JCP brand logo programs, the JCP.org site, and engaging the community in online surveys and usability studies. She also developed marketing reward programs,  campaigns, sponsorships, and events for the JCP program, including the community gathering at the annual JavaOne Conference.   Before arriving at the JCP community in 2000, Heather worked with various technology companies.  Heather enjoys speaking at conferences, such as Devoxx, Java Zone, and the JavaOne Conferences. She maintains the JCP Blog, Twitter feed (@jcp_org) and Facebook page.  Heather resides in the San Francisco Bay Area, California USA. JCP Executive Committee Public Meeting Details Date & Time Tuesday November 20, 2012, 3:00 - 4:00 pm PST Location Teleconference Dial-in +1 (866) 682-4770 Conference code: 627-9803 Security code: 52732 ("JCPEC" on your phone handset) For global access numbers see http://www.intercall.com/oracle/access_numbers.htm Or +1 (408) 774-4073 WebEx Browse for the meeting from https://jcp.webex.com No registration required (enter your name and email address) Password: JCPEC Agenda JSR 355 (the EC merge) implementation report JSR 358 (JCP.next.3) status report 2.8 status update and community audit program Discussion/Q&A Note The call will be recorded and the recording published on jcp.org, so those who are unable to join in real-time will still be able to participate. September 2012 EC meeting PMO report with JCP 2.8 statistics.JSR 358 Project page What’s Cool Sweden: Hot Java in the Winter GE Engergy using Invoke Daynamic for embedded development

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