latex elongated parentheses
- by Flavius
How to make the first matrix look like the latter?
The code of the first matrix is:
$$F(x)=\left(
\begin{array}{cc}
\frac{x}{2} & 0 \\
0 & x^2\\
\end{array}\right)$$
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Loading a Browser Page in the Background
- by stormin986
I have a tabbed interface (one activity per tab) where one tab will be a browser view displaying a webpage. The application loads in a different activity / view, but I want it to begin to download the webpage in the background as soon as the app launches, before the user ever clicks on that tab and initiates that activity. How can I do this? Thanks! -SRead the article
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Exception in thread "main" java.lang.OutOfMemoryError, How to find and fix??
- by or.nomore
hey, I'm trying to programming a crossword creator. using a given dictionary txt file and a given pattern txt file. The basic idea is using DFS algorithm. the problem begin when the dictionary file is v-e-r-y big (about 50000 words). then i recive the : Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded i know that there is a part in my program that waists memory, but i don't know where it is, how to find it and how to fix itRead the article
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in sqlite3, can a select succeed within a transaction of insert?
- by quantity
I begin a transaction, which is to insert several records into a table. Can I select the latest inserted record out of the database before the transaction commit?Read the article
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Tell SQL Server the error is "handled" in try...catch
- by Restless Archer
Hi. I'd like to indicate to SQL Server 2005, in my BEGIN CATCH...END CATCH block that the error is "handled"... That is, clear the error. Is that possible?? Thanks. A.Read the article
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Scalable chat site in python
- by user346572
Hey guys, I have an idea that I'd like to start implementing that at the crux of it, will basically be a chat website, and will need to support multiple rooms. Quite frankly, I'm not too sure where to begin with regards to setting up a very sturdy/scalable chat system in python (or another language if you guys believe it to be a better alternative), so any suggestions that can get me pointed in the right direction will be greatly appreciated.Read the article
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How do I add information to an exception message without changing its class in ruby?
- by Andrew Grimm
How do I add information to an exception message without changing its class in ruby? The approach I'm currently using is strings.each_with_index do |string, i| begin do_risky_operation(string) rescue raise $!.class, "Problem with string number #{i}: #{$!}" end end Is there a better way?Read the article
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itemize with " - " in Latex
- by qwerty
Hello, If i use \begin{itemize} \item asdasd \item dsfsdf \end{itemize} , then the items are with a bullet. Bot how can i itemize these two with a "-" (a small line) ? Thanks!Read the article
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Regular Expression - Match only 7 chars?
- by Simon
I'm trying to match a SEDOL (exactly 7 chars: 6 alpha-numeric chars followed by 1 numeric char) My regex ([A-Z 0-9]{6})[0-9]{1} matches correctly but strings greater than 7 chars that begin with a valid match also match (if you see what I mean :)). For example: B3KMJP4 matches correctly but so does: B3KMJP4x which shouldn't match. Can anyone show me how to avoid this?Read the article
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Pass a variable into a trigger
- by Codesleuth
I have a trigger which deals with some data for logging purposes like so: CREATE TRIGGER trgDataUpdated ON tblData FOR UPDATE AS BEGIN INSERT INTO tblLog ( ParentID, OldValue, NewValue, UserID ) SELECT deleted.ParentID, deleted.Value, inserted.Value, @intUserID -- how can I pass this in? FROM inserted INNER JOIN deleted ON inserted.ID = deleted.ID END How can I pass in the variable @intUserID into the above trigger, as in the following code: DECLARE @intUserID int SET @intUserID = 10 UPDATE tblData SET Value = @x PS: I know I can't literally pass in @intUserID to the trigger, it was just used for illustration purposes.Read the article
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LaTeX table cells content vertical alignment problem.
- by Jarek Waliszko
Hello, I'd like to align text in right cell of table created below, to be vertically align to the top. How to do that ? \begin{tabular}{l|p{3cm}} \rule{2cm}{5cm} & Top align content ? \\ \end{tabular} RegardsRead the article
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python - remove string from words in an array
- by tekknolagi
#!/usr/bin/python #this looks for words in dictionary that begin with 'in' and the suffix is a real word wordlist = [line.strip() for line in open('/usr/share/dict/words')] newlist = [] for word in wordlist: if word.startswith("in"): newlist.append(word) for word in newlist: word = word.split('in') print newlist how would I get the program to remove the string "in" from all the words that it starts with? right now it does not workRead the article
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Play animation (storyboard) backwards
- by drasto
Is there a simple way to play some StoryBoad backward (reversed) ? As there is a method Storyboard.Begin() I would expect that there is some method like "Storyboard.BeginReversed()" but I cannot find it. If there is no way to play an animation backwards that I have to write for most of my animations complementary animations. That smells bad to me (code duplication of some kind). Basically I just animate a Grid that shows and than hides.Read the article
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SQL CASE Question
- by docsql
Hiya, I dont know if this can be done but i'd though i'd ask. What I want to do is have a case statement query and if a 1 begin another action. if 0 dont do anything. For Example select CASE WHEN client.deathofdeath = yes THEN 1 do another select in here (which is another table) Else 0 End AS DeathDate From Client client Can this be done?Read the article
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Lucene query: bla~* (match words that start with something fuzzy), how?
- by Skipperkongen
In the Lucene query syntax I'd like to combine * and ~ in a valid query similar to: bla~* //invalid query Meaning: Please match words that begin with "bla" or something similar to "bla".Read the article
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Use single static image as map
- by berve
I have a single image (a flattened out image of the world map), I want to be able to plot some coordinates in this image without having to create a map server or whatever per se, Idon't know where to begin, whats the easiest approachRead the article
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I'm stuck in a basic Mongodb php tutorial
- by p0larBoy
I was following this tutorial : http://pronewb.com/mongodb-as-in-humongous-not-retarded. All was well until the "I feel the vibe" section. I do not know where to begin this section. Do i have to create a new php file or type it in some command line?Read the article
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How to hire a good ui designer
- by Mark
I have a webapp that can probably look better. Looking on jobs.stackoverflow, all I see for UI jobs are full-time positions. Is it possible to hire a good UI designer for freelance work? Where would I begin? And anyone know how much I would be looking at?Read the article
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Windows Forms: Set form Visibility Based on Focus enabled of external window
- by zion
I would like to create a Windows Forms application that when run is only visible once another external window (notepad.exe) is enabled/focused. Any hints, I don't know where to begin. If my form is running I would like it to popup when Notepad is enabled and disappear when Notepad loses focus.Read the article
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How can I improve my logical and analytical thinking skills so as to become an awesome programmer ?
- by happysoul
solve puzzles ? Solve programming problems ? what else ? Someone told me that I need begin with solving typical programs in C like those of factorial, recursion etc to improve logical thinking skills. What else do I do ? How do i go about it ? I am a beginner to programming.Read the article
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why does java's URL class not recognize certain protocols ?
- by trinity
Hello all , URL u=new URL("telnet://route-server.exodus.net"); This line is generating : java.net.MalformedURLException: unknown protocol: telnet And i encounter similar problems with other URLs that begin with "news://" These are URLs extracted from ODP , so i dont understand why such exceptions arise..Read the article
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Trouble passing a string as a SQLite ExecSQL command
- by Hackbrew
I keep getting the ERROR: near "PassWord": syntax error when trying to execute the ExecSQL() statement. The command looks good in the output of the text file. In fact, I copied & pasted the command directly into SQLite Database Browser and the commend executed properly. Here's the code that's producing the error: procedure TForm1.Button1Click(Sender: TObject); var i, iFieldSize: integer; sFieldName, sFieldType, sFieldList, sExecSQL: String; names: TStringList; f1: Textfile; begin //Open Source table - Table1 has 8 fields but has only two different field types ftString and Boolean Table1.TableName:= 'PWFile'; Table1.Open; //FDConnection1.ExecSQL('drop table PWFile'); sFieldList := ''; names := TStringList.Create; for i := 0 to Table1.FieldCount - 1 do begin sFieldName := Table1.FieldDefList.FieldDefs[i].Name; sFieldType := GetEnumName(TypeInfo(TFieldType),ord(Table1.FieldDefList.FieldDefs[i].DataType)); iFieldSize := Table1.FieldDefList.FieldDefs[i].Size; if sFieldType = 'ftString' then sFieldType := 'NVARCHAR' + '(' + IntToStr(iFieldSize) + ')'; if sFieldType = 'ftBoolean' then sFieldType := 'INTEGER'; names.Add(sFieldName + ' ' + sFieldType); if sFieldList = '' then sFieldList := sFieldName + ' ' + sFieldType else sFieldList := sFieldList + ', ' + sFieldName + ' ' + sFieldType; end; ListBox1.Items.Add(sFieldList); sExecSQL := 'create table IF NOT EXISTS PWFile (' + sFieldList + ')'; // 08/18/2014 - Entered this to log the SQLite FDConnection1.ExecSQL Command to a file AssignFile(f1, 'C:\Users\Test User\Documents\SQLite_Command.txt'); Rewrite(f1); Writeln(f1, sExecSQL); { insert code here that would require a Flush before closing the file } Flush(f1); { ensures that the text was actually written to file } CloseFile(f1); FDConnection1.ExecSQL(sFieldList); Table1.Close; end; Here's the actual command that gets executed: create table IF NOT EXISTS PWFile (PassWord NVARCHAR(10), PassName NVARCHAR(10), Dept NVARCHAR(10), Active NVARCHAR(1), Admin INTEGER, Shred INTEGER, Reports INTEGER, Maintain INTEGER)Read the article
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not use "using" statement for TransactionScope
- by hotyi
i always using the following format to use transactionscope. using(TransactionScope scope = new TransactionScope()){ .... } sometimes i want to wrap the transactionscope to a new class, for example DbContext class, i want to using the statement like dbContext.Begin(); ... dbContext.Submit(); it seems the transactioncope class need use "using"statement to do dispose, i want to know if there is anyway not use "using".Read the article
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Canonical pattern reference in Actors programming model.
- by Bubba88
Hello! Is there a source, which I could use to learn some of the most used and popular practices regarding Actor-/Agent-oriented programming. My primary concern is about parallelism and distribution limited to the mentioned scheme - Actors, message passing. Should I begin with Erlang documentation or maybe there is any kind of book that describes the most important building blocks when programming Actor-oriented? Thank you! (Most useful examples would be in Scala or F#)Read the article
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datalist , jquery
- by sam
hi folks., i am using a datalist in usercontrol.. i need to select data from datalist using jquery and store it in session?how to begin with? ThanksRead the article
