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  • JavaScript array random index insertion and deletion

    - by Tomi
    I'm inserting some items into array with randomly created indexes, for example like this: var myArray = new Array(); myArray[123] = "foo"; myArray[456] = "bar"; myArray[789] = "baz"; ... In other words array indexes do not start with zero and there will be "numeric gaps" between them. My questions are: Will these numeric gaps be somehow allocated (and therefore take some memory) even when they do not have assigned values? When I delete myArray[456] from upper example, would items below this item be relocated? EDIT: Regarding my question/concern about relocation of items after insertion/deletion - I want to know what happens with the memory and not indexes. More information from wikipedia article: Linked lists have several advantages over dynamic arrays. Insertion of an element at a specific point of a list is a constant-time operation, whereas insertion in a dynamic array at random locations will require moving half of the elements on average, and all the elements in the worst case. While one can "delete" an element from an array in constant time by somehow marking its slot as "vacant", this causes fragmentation that impedes the performance of iteration.

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  • JavaScript for loop index strangeness

    - by pythonBOI
    I'm relatively new to JS so this may be a common problem, but I noticed something strange when dealing with for loops and the onclick function. I was able to replicate the problem with this code: <html> <head> <script type="text/javascript"> window.onload = function () { var buttons = document.getElementsByTagName('a'); for (var i=0; i<2; i++) { buttons[i].onclick = function () { alert(i); return false; } } } </script> </head> <body> <a href="">hi</a> <br /> <a href="">bye</a> </body> </html> When clicking the links I would expect to get '0' and '1', but instead I get '2' for both of them. Why is this? BTW, I managed to solve my particular problem by using the 'this' keyword, but I'm still curious as to what is behind this behavior.

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  • Scala create xhtml elements dynamically

    - by portoalet
    Given a String array val www = List("http://bloomberg.com", "http://marketwatch.com"); I want to dynamically generate <span id="span1">http://bloomberg.com</span> <span id="span2">http://marketwatch.com</span> def genSpan(web: String) = <span id="span1"> + web + </span>; www.map(genSpan); // How can I pass the loop index? How can I use scala map function to generate the ids (span1, span2), as 1 and 2 are the loop indexes ? Or is the only way is to use for comprehension?

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  • Is it possible to create multi-tiered WHERE statements in mySQL

    - by Brendan
    I'm currently developing a program that will generate reports based upon lead data. My issue is that I'm running 3 queries for something that I would like to only have to run one query for. For instance, I want to gather data for leads generated in the past day submission_date > (NOW() - INTERVAL 1 DAY) and I would like to find out how many total leads there were, and how many sold leads there were in that timeframe. (sold=1 / sold=0). The issue comes with the fact that this query is currently being done with 2 queries, one with WHEREsold= 1 and one with WHEREsold= 0. This is all well and good, but when I want to generate this data for the past day,week,month,year,and all time I will have to run 10 queries to obtain this data. I feel like there HAS to be a more efficient way of doing this. I know I can create a mySQL function for this, but I don't see how this could solve the problem. Thanks!!

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  • Macro - To create one [.csv] file from/using multiple workbooks, kept in a folder, containing multi

    - by AJ
    Hello, I have more than one Excel Workbooks containing multiple worksheets in each of them. I would like to have a macro which help me to create (combine the information from) all the worksheets into one pipe [|] delimited [.csv] file. These sheets should be combined/appended into the [.csv] file, in the same order these worksbooks appear in a folder and in the order sheets appear in these workbooks. The macro should ask for a delimiter/separator specific to me and the input and output path based on my selection. It would be great if the output [.csv] file is names as "foldername" + "Output.csv" Thank you, Best Regards - AJ

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  • Passing a column name instead of index in sqlite3

    - by user271753
    The problem code: NSString *query = @"SELECT Name FROM Category"; sqlite3_stmt *statement; if (sqlite3_prepare_v2(database, [query UTF8String], -1, &statement, nil) == SQLITE_OK) { while (sqlite3_step(statement) == SQLITE_ROW) { char *row =(char *)sqlite3_column_text(statement,0); char *rowData = (char *)sqlite3_column_text(statement,1); NSString *fieldName = [[NSString alloc] initWithUTF8String:row]; NSString *fieldValue = [[NSString alloc] initWithUTF8String:rowData]; NSLog(@"%@",fieldName); NSLog(@"%@",fieldValue); [fieldName release]; [fieldValue release]; } sqlite3_finalize(statement); } char *row =(char *)sqlite3_column_text(statement,0); In the above code instead of 0 can't I just pass a column name? How can I do that ?

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  • PHP: Building A Stock Index Using Yahoo Finance [on hold]

    - by Jeremy
    I have the following code which is pulling data but it is not outputting properly. <?php class YahooStock { public function getQuotes(){ $stocks = array(); $result = array(); $s = file_get_contents("http://finance.yahoo.com/d/quotes.csv?s=AMZN+CRM+CNQR+CTL+CTXS+DWRE+EMC+GOOG+HP+IBM+JIVE+LNKD+MKTO+MSFT+N+NFLX+NOW+ORCL+RAX+SAP+T+VEEV+VMW+VZ+WDAY&f=npf6&e=.csv"); $data = explode( ',', $s); $result = $data; return $result; } } $objYahooStock = new YahooStock; foreach( $objYahooStock->getQuotes() as $code => $result){ echo 'Name:' . $result[0] . '<br />'; echo 'Price:' . $result[1] . '<br />'; echo 'Float:' . $result[2] . '<br />'; } ?> The output looks like it is separating every character with a comma instead of each column: Name:" Price:A Float:m Name: Price:I Float:n Name:3 Price:3 Float:2 Name: Price: Float: Any help is appreciated!

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  • css position question: layers with z-index?

    - by user239831
    hey guys, i have a probably rather simpel problem: my website has two layers: 1) a drag&drop navigation on top which should be positioned absolute, so scrolling doesn't affect the bars. 2) a content area in the back behind the navigation which should be scrollable. you can see what i mean right here: http://jsfiddle.net/Pghqv/ however now, i cannot click links in my content-area in the back. any ideas or solutions how i can still have the same position result and the links in the back are working? thank you very much.

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  • Notepad++ like "multi editing" in VIM?

    - by proto-n
    I'm switching from Notepad++ to VIM as main text editor. Notepad++ can have multiple cursors by holding down ctrl and clicking anywhere in the text, so if you type, the text appears in multiple locations. Is it possible in vim? Something like insert after selecting multiple rows in visual mode, but with the possibility to have cursors anywhere in the text. It's a feature I rarely use, also it's quite easily avoidable, I'm just curious, since its the only one I could't find a replacement for in vim yet.

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  • Ternary operator or chosing from two arrays with the boolean as index

    - by ajax333221
    Which of these lines is more understandable, faster jsPerf, easier to maintain?: arr = bol ? [[-2,1],[-1,2]] : [[-1,0],[-1,1]]; //or arr = [[[-1,0],[-1,1]], [[-2,1],[-1,2]]][bol*1]; I usually write code for computers (not for humans), but this is starting to be a problem when I am not the only one maintaining the code and work for a team. I am unsure, the first example looks neat but are two different arrays, and the second is a single array and seem to transmit what is being done easier. I also considered using an if-else, but I don't like the idea of writing two arr = .... Or are there better options? I need serious guidance, I have never worried about others seeing my code.

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  • Lookups in Multi-Tenant Database

    - by Huthaifa Afanah
    I am developing a SaaS application and I am looking for the best way to design lookup tables, taking in consideration: The look-up tables will have predefined data shared among all the tenants Each tenant must have the ability to extend the look-up table with his own data e.g adding a car class not defined I am thinking about adding TenantID column to each lookup and add the predefined data with setting that column to some value which represents the "Super Tenant" that belongs to the system itself

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  • Multi "column" DataGridView C#

    - by Wesley
    I have a DataGridView that's bound to a DataSet. It has columns DateCreated, Weight, DateUsed. Those three columns do not take up much horizontal space on DataGridView that is nearly full screen. Is it possible to have those columns wrap back to the top if the view is wide enough to support a second group of those colums. So across the header it would read DateCreated, Weight, DateUsed, DateCreated, Weight, DateUsed. Then when a row is clicked, only 3 cells would be highlighted, not all six. Is there something that can provide this functionality?

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  • Need Help for Listview WPF events for finding index of rows and columns

    - by Ravi
    I have a listview in WPF and i displayed data in line by line manner,i want to just find the indexs of the rows and columns,i am new to WPF,plz give me some idea about this. <Grid Margin="3"> <Grid.RowDefinitions> <RowDefinition></RowDefinition> <RowDefinition></RowDefinition> <RowDefinition></RowDefinition> <RowDefinition></RowDefinition> <RowDefinition></RowDefinition> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition Width="600"></ColumnDefinition> <ColumnDefinition></ColumnDefinition> </Grid.ColumnDefinitions> <StackPanel Orientation="Horizontal" Grid.RowSpan="1"> <Label Name="lblID1" FontWeight="Bold" Grid.Row="0">ID:</Label> <Label Name="lblID" Grid.Row="0"> <TextBlock FontFamily="verdana" FontSize="12" FontWeight="Bold" Grid.Column="0" Padding="0" Text="{Binding Path=ID}"></TextBlock> </Label> <Label Name="lblDescrip1" FontWeight="Bold" Grid.Row="1">Description:</Label> <Label Name="lblDescrip"> <TextBlock FontFamily="verdana" FontSize="12" Grid.Column="1" Text="{Binding Path=DESCRIP}"></TextBlock> </Label> </StackPanel> Fee: Type: Special:

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  • Multi color Edit Field (Win32)

    - by user146780
    I want to create a program that will parse text for key words and make these words a certain color. What type of control supports many different colors? Would I have to create my own, or override the OnPaint() of a basic control or something? (Id like to avoid making my own control from scratch) Thanks

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  • SQL tables using VARCHAR with UTF8 (with respect to multi byte character length)

    - by Elius
    Like in Oracle VARCHAR( 60 CHAR ) I would like to specify a varchar field with variable length depending on the inserted characters. for example: create table X (text varchar(3)) insert into X (text) VALUES ('äöü') Should be possible (with UTF8 as the default charset of the database). On DB2 I got this Error: DB2 SQL Error: SQLCODE=-302, SQLSTATE=22001 (Character data, right truncation occurred; for example, an update or insert value is a string that is too long for the column, or a datetime value cannot be assigned to a host variable, because it is too small.) I'm looking for solutions for DB2, MsSql, MySql, Hypersonic.

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  • How to design model for multi-tiered data?

    - by Chris
    Say I have three types of object: Area, Subarea and Topic. I want to be able to display an Area, which is just a list of Subareas and the Topics contained in those Subareas. I never want to be able to display Subareas separately - they're just for breaking up the Topics. Topics can, however, appear in multiple Areas (but probably under the same Subarea). How would I design a model for this? I could use ForeignKey from Topic to Subarea and from Subarea to Area, but it seems unnecessarily complex given that I never want to interact with subareas themselves. Also, none of these objects are ever altered or added to by the user. They're just for me to represent information. Maybe there is a better way to represent it all?

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  • .htaccess trickery multi-language website

    - by user1658741
    I have a website right now that uses two languages (french and english) The way it works right now is that if someone goes to mysite.com/folder/file.php for example, file.php is simply a script that figures out which language to use, get's it's own path and filename(file.php) and serves up mysite.com/en/folder/file.php (if the language is english). However what shows up in the URL is still mysite.com/folder/file.php. For any folder and any file the same script is used. If I want to add a new file I have to add the file to the folder the user types into the browser as well to the en and fr folders. Could I do some .htaccess trickery so that whatever URL is typed, one .php file gets open that checks the language and what folder/file was requested and then serves up the correct language file? here's the php file that is served up for any files in the URL. <?php // Get current document path which is mirrored in the language folders $docpath = $_SERVER['PHP_SELF']; // Get current document name (Used when switching languages so that the same current page is shown when language is changed) $docname = GetDocName(); //call up lang.php which handles display of appropriate language webpage. //lang.php uses $docpath and $docname to give out the proper $langfile. //$docpath/$docname is mirrored in the /lang/en and /lang/fr folders $langfile = GetDocRoot()."/lang/lang.php"; include("$langfile"); //Call up the proper language file to display function GetDocRoot() { $temp = getenv("SCRIPT_NAME"); $localpath=realpath(basename(getenv("SCRIPT_NAME"))); $localpath=str_replace("\\","/",$localpath); $docroot=substr($localpath,0, strpos($localpath,$temp)); return $docroot; } function GetDocName() { $currentFile = $_SERVER["SCRIPT_NAME"]; $parts = Explode('/', $currentFile); $dn = $parts[count($parts) - 1]; return $dn; } ?>

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  • .net (winforms, not asp) multi-server deployment

    - by poiuyttr
    I have a small .NET WinForms application, and couple of linux servers, DEV and CL1,CL2..CLN (DEV is development server and CL* are servers which belons to our clients, they are in private networks and it's a kind of production servers) I want an update mechanism so that (1) i develop a new version and publish it to a DEV (2) users of DEV-server install latest version from DEV (3) users of CL2 (employees of client2) install stable version from CL-2 directly (4) application checks for updates using server it was installed from (so, if it was installed from CL-2, it should check CL-2 for updates) (5) i should be able to propogate the update to a selected CL-server (using just file copy & maybe sed; not republishing), if i want that (and if i don't, that CL-server will have an old version until manually i update it) I tried to use clickonce, but looks like it meets only first two requirements. What should i do?

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  • How to use pointers and pointer aritmetic

    - by booby
    : error C2064: term does not evaluate to a function taking 1 arguments : error C2227: left of '-name' must point to class/struct/union/generic type how do i fix this so this error doesn't happen for(int index = 0; index < (numStudents); index++) { if (student(index + 1)->score >= 90 ) student(index + 1)->grade = 'A'; else if (student(index + 1)->score >= 80 ) student(index + 1)->grade = 'B'; else if (student(index + 1)->score >= 70 ) student(index + 1)->grade = 'C'; else if (student(index + 1)->score >= 60 ) student(index + 1)->grade = 'D'; else student(index + 1)->grade = 'F'; }

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  • PHP mysql multi-table search returning different table and field data row after row

    - by Kinyanjui Kamau
    Hi Guys, I am building a social networking site that is dedicated to nightclubs and night events. Among other tables, I have a users table, events table and establishments table. I am really intrigued with how Facebook in particular is able to query and return matches of not just users but also pages, ads etc row after row. Im sure most who are reading this have tried the facebook search My question is in my case, should I: Perform 3 separate LIKE %search% on each of the tables on search.php. Draw up 3 separate tables to show the results of what matches in the relevant queries which are collapsed when empty(on the same search.php) ie In search.php //query users table $query_user = "SELECT user_first_name, user_last_name, username, picture_thumb_url, avatar FROM users JOIN picture ON users.user_id = picture.user_id AND picture.avatar=1 ORDER BY users.user_id"; $result_users = mysql_query($query_user, $connections) or die(mysql_error()); $row_result_users = mysql_fetch_assoc($wid_updates); //query events table $query_event = "SELECT event_thumb_url, event_name, event_venue, event_date FROM event WHERE event_name LIKE '%".$search_value."%'"; $event = mysql_query($query_event, $connections) or die(mysql_error()); $row_event = mysql_fetch_assoc($event); $totalRows_event = mysql_num_rows($event); //query establishments table $query_establishment = "SELECT establishment_thumb_url, establishment_name, location_id, establishment_pricing FROM establishment WHERE establishment_name LIKE '%".$search_value."%'"; $establishment = mysql_query($query_establishment, $connections) or die(mysql_error()); $row_establishment = mysql_fetch_assoc($establishment); $totalRows_establishment = mysql_num_rows($establishment); My html: <table max-width="500" name="users" border="0"> <tr> <td width="50" height="50"></td> <td width="150"></td> <td width="150"></td> <td width="150"></td> </tr> </table> <table width="500" name="events" border="0"> <tr> <td width="50" height="50"><a href="#profile.php"><img src="Images/<?php echo $row_event['event_thumb_url']; ?>" border="0" height="50" width="50"/></a></td> <td width="150"><?php echo $row_event['event_name']; ?></td> <td width="150"><?php echo $row_event['event_venue']; ?></td> <td width="150"><?php echo $row_event['event_date']; ?></td> </tr> </table> <table width="500" name="establishments" border="0"> <tr> <td width="50" height="50"><a href="#profile.php"><img src="Establishment_Images/<?php echo $row_establishment['establishment_thumb_url']; ?>" border="0" height="50" width="50"/></a></td> <td width="150"><?php echo $row_establishment['establishment_name']; ?></td> <td width="150"><?php echo $row_establishment['location_id']; ?></td> <td width="150"><?php echo $row_establishment['establishment_pricing']; ?></td> </tr> </table> I haven't populated the PHP echo's for the user table. This is just to give you an idea of what I am trying to do. Any assistance?

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  • i get error when i try to upload a file?

    - by getaway
    I keep getting an error:Notice: Undefined index: on line 35 line 35: $handle = new Upload($_FILES['my_field']); this is my input field <input type="file" size="32" name="my_field" value="" /> I do not understand this error, thanks!!! EDIT: <form name="upload" id="upload" enctype="multipart/form-data" method="post" action="actions/upload.php" /> <p><input type="file" size="32" name="my_field" value="" /></p> <p class="button"><input type="hidden" name="action" value="image" /> <br> <input style="margin-left:224px;" type="submit" name="submit" value="upload" />

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  • Increment an index that uses numbers and characters

    - by Martin
    I have a string based code that can be either two or three characters in length and I am looking for some help in creating a function that will increment it. Each 'digit' of the code has a value of 0 to 9 and A to Z. some examples: the first code in the sequence is 000 009 - next code is - 00A 00D - next code is - 00E AAZ - next code is - AB0 the last code is ZZZ. Hope this makes some sense.

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  • Changing newid() to newsequentialid() on an existing table

    - by cbp
    Hi, At the moment we have a number of tables that are using newid() on the primary key. This is causing large amounts of fragmentation. So I would like to change the column to use newsequentialid() instead. I imagine that the existing data will remain quite fragmented but the new data will be less fragmented. This would imply that I should perhaps wait some time before changing the PK index from non-clustered to clustered. My question is, does anyone have experience doing this? Is there anything I have overlooked that I should be careful of?

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