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writing a fast parser in python

- by panzi

I've written a hands-on recursive pure python parser for a some file format (ARFF) we use in one lecture. Now running my exercise submission is awfully slow. Turns out by far the most time is spent in my parser. It's consuming a lot of CPU time, the HD is not the bottleneck. I wonder what performant ways are there to write a parser in python? I'd rather not rewrite it in C. I tried to use jython, but that decreased performance a lot! The files I parse are partially huge ( 150 MB) with very long lines. My current parser only needs a look-ahead of one character. I'd post the source here but I don't know if that's such a good idea. After all the submission deadline has not jet ended. But then, the focus in this exercise is not the parser. You can choose whatever language you want to use and there already is a parser for Java.

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Returning control codes as JSON to a jquery ajax json call

- by Graham

I want to know if it is possible to return ascii control codes in JSON format from classic ASP to a jQuery ajax call. This is my jQuery call: $.ajax({ url: "/jsontest.asp", type: "POST", cache: false, dataType: "json", complete: function(data) { var o = $.parseJSON(data.responseText.toString()); }, error: function(data1, data2) { alert("There has been an error - please try again"); } }); This is my called page: {"val1":123,"val2","abcdef"} The above works fine, but if I change my called page to include ascii character 31 (1F) like so: {"val1":123,"val2","abc\x1Fdef"} then I get the alert in my error function. Can this be done, and if so, how please. Note: I'm using jQuery 1.7.1 and both IIS 6 and IIS 7 I have tried: \x1f, %1f, and \u001f

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How can I get a value from an xml key/value pair with xpath in my xslt?

- by TahoeWolverine

I have some xml that I want to process using xslt. A good amount of the data comes through in key value pairs (see below). I am struggling with how to extract the value base on the key into a variable. I would like to be able to do something like this: <xsl:variable name="foo" select="/root/entry[key = 'foo']/value"/> but that doesn't seem to work. Here is sample xml. <?xml version="1.0" encoding="ISO-8859-1"?> <root> <entry> <key> foo </key> <value> bar </value> </entry> </root> What would the correct xpath be for this?

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Problem in getting contents of formula based cell using JXL api in JAVA

- by user202328

Hello, I am facing a problem while getting contents of cell using JXL api, if I am using formula in xls sheet. Right now I am using formula - IF($L10="","",+ROUND($L10*1.375,3)) in each cell but when the cell value is blank i am getting junk charactes when i call cell.getContents() method, the code snip is as follows - Workbook = Workbook.getWorkbook(p_sourceFile); excelsheet = workbook.getSheet(0); for (int row = 1; row < noOfRows; row++) { cell = excelsheet.getCell(col, row); content = cell.getContents(); System.out.println("content-" + content); //Is giving me junk character ? when the cell value is blank. ... It will be a great help if anyone can help me !!! Regards, Amit

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java xml pretty printing - preserve empty elements and white pace

- by javamonkey79

Basically, I am looking for a java library that will take this: <foo><bar> </bar><baz>yadda</baz></foo> And pretty print it to this: <?xml version="1.0" encoding="UTF-8"?> <foo> <bar> </bar> <baz>yadda</baz> </foo> e.g. preserving whitespace AND blank elements The closest I have got was with dom4j like so: OutputFormat format = OutputFormat.createPrettyPrint(); format.setTrimText( false ); However, this does not honor the whitespace unless the element contains other character data. I'm not opposed to writing something on my own, but I would think this has already been done, why reinvent the wheel?

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Need help debugging a PHP 5 SOAP hello world application

- by WarDoGG

I've been trying to get PHP 5 SOAP extension to work after reading every tutorial there is on the web, but to no avail. This has been very frustrating and i would really appreciate it if someone could point out where i am going wrong and why. Thanks for your help in advance, and any more details needed i'll oblige. The WSDL is as follows : <?xml version="1.0" encoding="utf-8"?> <wsdl:definitions name="test" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tm="http://microsoft.com/wsdl/mime/textMatching/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:tns="http://tempuri.org/" xmlns:s1="http://microsoft.com/wsdl/types/" xmlns:s="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" targetNamespace="http://tempuri.org/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"> <wsdl:types> <s:schema elementFormDefault="qualified" targetNamespace="http://tempuri.org/"> <s:import namespace="http://microsoft.com/wsdl/types/" /> <s:element name="getUser"> <s:complexType> <s:sequence> <s:element minOccurs="0" maxOccurs="1" name="username" type="s:string" /> <s:element minOccurs="0" maxOccurs="1" name="password" type="s:string" /> </s:sequence> </s:complexType> </s:element> <s:element name="getUserResponse"> <s:complexType> <s:sequence> <s:element minOccurs="0" maxOccurs="1" name="getUserResult" type="tns:bookUser" /> </s:sequence> </s:complexType> </s:element> <s:complexType name="bookUser"> <s:sequence> <s:element minOccurs="1" maxOccurs="1" name="ID" type="s:int" /> <s:element minOccurs="1" maxOccurs="1" name="GUID" type="s1:guid" /> <s:element minOccurs="0" maxOccurs="1" name="login" type="s:string" /> <s:element minOccurs="0" maxOccurs="1" name="pass" type="s:string" /> </s:sequence> </s:complexType> </s:schema> </wsdl:types> <wsdl:message name="getUserSoapIn"> <wsdl:part name="parameters" element="tns:getUser" /> </wsdl:message> <wsdl:message name="getUserSoapOut"> <wsdl:part name="parameters" element="tns:getUserResponse" /> </wsdl:message> <wsdl:portType name="test"> <wsdl:operation name="getUser"> <wsdl:input message="tns:getUserSoapIn" /> <wsdl:output message="tns:getUserSoapOut" /> </wsdl:operation> </wsdl:portType> <wsdl:binding name="testBinding" type="tns:test"> <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http" /> <wsdl:operation name="getUser"> <soap:operation soapAction="http://tempuri.org/getUser" /> <wsdl:input> <soap:body use="literal" /> </wsdl:input> <wsdl:output> <soap:body use="literal" /> </wsdl:output> </wsdl:operation> </wsdl:binding> <wsdl:service name="testService"> <wsdl:port name="testPort" binding="tns:testBinding"> <soap:address location="http://127.0.0.1/index.php" /> </wsdl:port> </wsdl:service> </wsdl:definitions> The code for the server : <?php function getUser($param) { return array( 'bookUser'=>array ( 'ID'=>1, 'GUID'=>2, 'login'=>$param->username, 'pass'=>$param->password ) ); } ini_set("soap.wsdl_cache_enabled", "0"); // disabling WSDL cache $server = new SoapServer("http://127.0.0.1/1.wsdl"); $server->addFunction("getUser"); $server->handle(); ?> and the code for the client : $client = new SoapClient("http://127.0.0.1/index.php?wsdl", array('exceptions' => 0)); try { $arr_data = array ( array ( 'username'=>'xyz', 'password'=>'abc' ) ); print_r($client->__soapCall("getUser",$arr_data)); } catch (SoapFault $result) { print_r($result); }

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How to print non-ASCII characters in Python

- by Roman

I have a problem when I'm printing (or writing to a file) the non-ASCII characters in Python. I've resolved it by overriding the str method in my own objects, and making "x.encode('utf-8')" inside it, where x is a property inside the object. But, if I receive a third-party object, and I make "str(object)", and this object has a non-ASCII character inside, it will fail. So the question is: is there any way to tell the str method that the object has an UTF-8 codification, generically? I'm working with Python 2.5.4.

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Where is the Android Metamodel located?

- by Dominik

Hey, I would like to use Android for Model-Driven-Software-Development. For this, I need to locate the Android Model in the SDK. I already searched a while for it, but were not able to find it. Has anyone an idea where it could be? Is it possible, that it is the AndroidManifest.xml-File in the folder android-sdk-\platforms\android-x\android.jar? After unpacking this file, I am not able to open that file correctly on Windows XP, because a lot of characters have the wrong character set. Or is it also possible, that it is only located in the source code? Thanks in advance, Dominik

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How to parse the MailMessage object from raw email string

- by Xmindz

I have written a program in C# which connects to a POP Server and retrieves raw email message strings from the server using POP3 command RETR. Since the email message being retrieved by the program is in plain text format with all the headers and message body with in the same, its too difficult to extract each header and mail body from the raw string. Could anybody tell me a solution by which I can parse the entire raw text to a System.Net.Mail.MailMessage object? Following is a sample email raw string: +OK 1281 octets Return-Path: <[email protected]> Delivered-To: samplenet-sample:[email protected] X-Envelope-To: [email protected] Received: (qmail 53856 invoked from network); 22 Sep 2012 06:11:46 -0000 Received: from mailwash18.pair.com (66.39.2.18) MIME-Version: 1.0 From: "Deepu" <[email protected]> To: [email protected] Date: 22 Sep 2012 11:41:39 +0530 Subject: TEST Subject Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Message-Id: <[email protected]> TEST Body .

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No Binary File Generation

- by Nathan Campos

I've just bought a new laptop for me on the travel, then on my free time, I've started to test MinGW on it by trying to compile my own OS that is written in C++, then I've created all the files needed and the kernel.cpp: extern "C" void _main(struct multiboot_data* mbd, unsigned int magic); void _main( struct multiboot_data* mbd, unsigned int magic ) { char * boot_loader_name =(char*) ((long*)mbd)[16]; /* Print a letter to screen to see everything is working: */ unsigned char *videoram = (unsigned char *) 0xb8000; videoram[0] = 65; /* character 'A' */ videoram[1] = 0x07; /* forground, background color. */ } And tried to compile it with g++ G: g++ -o C:\kernel.o -c kernel.cpp -Wall -Wextra -Werror -nostdlib -nostartfiles -nodefaultlibs kernel.cpp: In function `void _main(multiboot_data*, unsigned int)': kernel.cpp:8: warning: unused variable 'boot_loader_name' kernel.cpp: At global scope: kernel.cpp:4: warning: unused parameter 'magic' G: But it don't create any binary file at C:/, what can I do?

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Error on change form action

- by Thomas

Hi, I'm changing the form action with: window.onload = function() { document.getElementById('pdf').onclick = addExportEvent; document.getElementById('xls').onclick = addExportEvent; document.getElementById('xml').onclick = addExportEvent; document.getElementById('csv').onclick = addExportEvent; } function addExportEvent() { data = grid.getAllGridData(); document.getElementById('dados').setAttribute('value', encodeURIComponent(JSON.stringify(data))); formulario = document.getElementById('formulario'); // Line 55! formulario.action = 'php/' + this.id + '.php'; formulario.submit(); return false; } But it doesn't work with Internet Explorer. It returns the following error: Message: The object doesn't support the property or method. Line: 55 Character: 2 Code: 0 URI: http://www.site.com/javascript/scripts.js

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XSLT: Disable output escaping in an entire document.

- by Kragen

I'm trying to generate some C# code using xslt - its working great until I get to generics and need to output some text like this: MyClass<Type> In this case I've found that the only way to emit this is to do the following: MyClass<xsl:text disable-output-escaping="yes"><</xsl:text>Type<xsl:text disable-output-escaping="yes">></xsl:text> Where: Often it all needs to go on one line, otherwise you end up with line breaks in the generated code In the above example I technically could have used only 1 <xsl:text />, however usually the type Type is given by some other template, e.g: <xsl:value-of select="@type" /> I don't mind having to write < a lot, but I would like to avoid writing <xsl:text disable-output-escaping="yes"><</xsl:text> for just a single character! Is there any way of doing disable-output-escaping="yes" for the entire document?

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Changing Emacs Forward-Word Behaviour

- by gvkv

As the title says, how does one change the behaviour of emacs forward-word function? For example, suppose [] is the cursor. Then: my $abs_target_path[]= abs_path($target); <M-f> my $abs_target_path = abs[_]path($target); I know I could just use M-f M-b but as far as I'm concerned, that shouldn't be necessary and I'd like to change it. In particular, I want two things: When I press M-f, I want to go to the first character of the next word regardless of whether the point is within a word, within a group of spaces or somewhere else. Customize word-characters on a mode-by-mode basis. After all, moving around in CPerl mode is different than, say, TeX mode. So, in the above example, item 1 would have the cursor would move to the 'a' (and the point to it's left) after hitting M-f. Item 2 would allow me to define underscores and sigils as word characters.

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Using only alphanumeric characters(a-z) inside toCharArray

- by Aaron

Below you will find me using toCharArray in order to send a string to array. I then MOVE the value of the letter using a for statement... for(i = 0; i < letter.length; i++){ letter[i] += (shiftCode); System.out.print(letter[i]); } However, when I use shiftCode to move the value such as... a shifted by -1; I get a symbol @. Is there a way to send the string to shiftCode or tell shiftCode to ONLY use letters? I need it to see my text, like "aaron", and when I use the for statement iterate through a-z only and ignore all symbols and numbers. I THINK it is as simple as... letter=codeWord.toCharArray(a,z); But trying different forms of that and googling it didn't give me any results. Perhaps it has to do with regex or something? Below you will find a complete copy of my program; it works exactly how I want it to do; but it iterates through letters and symbols. I also tried finding instructions online for toCharArray but if there exists any arguments I can't locate them. My program... import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; /* * Aaron L. Jones * CS219 * AaronJonesProg3 * * This program is designed to - * Work as a Ceasar Cipher */ /** * * Aaron Jones */ public class AaronJonesProg3 { static String codeWord; static int shiftCode; static int i; static char[] letter; /** * @param args the command line arguments */ public static void main(String[] args) throws IOException { // Instantiating that Buffer Class // We are going to use this to read data from the user; in buffer // For performance related reasons BufferedReader reader; // Building the reader variable here // Just a basic input buffer (Holds things for us) reader = new BufferedReader(new InputStreamReader(System.in)); // Java speaks to us here / We get it to query our user System.out.print("Please enter text to encrypt: "); // Try to get their input here try { // Get their codeword using the reader codeWord = reader.readLine(); // Make that input upper case codeWord = codeWord.toUpperCase(); // Cut the white space out codeWord = codeWord.replaceAll("\\s",""); // Make it all a character array letter = codeWord.toCharArray(); } // If they messed up the input we let them know here and end the prog. catch(Throwable t) { System.out.println(t.toString()); System.out.println("You broke it. But you impressed me because" + "I don't know how you did it!"); } // Java Speaks / Lets get their desired shift value System.out.print("Please enter the shift value: "); // Try for their input try { // We get their number here shiftCode = Integer.parseInt(reader.readLine()); } // Again; if the user broke it. We let them know. catch(java.lang.NumberFormatException ioe) { System.out.println(ioe.toString()); System.out.println("How did you break this? Use a number next time!"); } for(i = 0; i < letter.length; i++){ letter[i] += (shiftCode); System.out.print(letter[i]); } System.out.println(); /**************************************************************** **************************************************************** ***************************************************************/ // Java speaks to us here / We get it to query our user System.out.print("Please enter text to decrypt: "); // Try to get their input here try { // Get their codeword using the reader codeWord = reader.readLine(); // Make that input upper case codeWord = codeWord.toUpperCase(); // Cut the white space out codeWord = codeWord.replaceAll("\\s",""); // Make it all a character array letter = codeWord.toCharArray(); } // If they messed up the input we let them know here and end the prog. catch(Throwable t) { System.out.println(t.toString()); System.out.println("You broke it. But you impressed me because" + "I don't know how you did it!"); } // Java Speaks / Lets get their desired shift value System.out.print("Please enter the shift value: "); // Try for their input try { // We get their number here shiftCode = Integer.parseInt(reader.readLine()); } // Again; if the user broke it. We let them know. catch(java.lang.NumberFormatException ioe) { System.out.println(ioe.toString()); System.out.println("How did you break this? Use a number next time!"); } for(i = 0; i < letter.length; i++){ letter[i] += (shiftCode); System.out.print(letter[i]); } System.out.println(); } }

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to print local xml file through NSData?

- by senthilmuthu

hi, i want to take some xml data from local path,and to parse,but when i use following code NSLog returns(content) different texts which is differed from xml file, how can i get exact xml data to check ,it consists correct xml data or not? any help please? when i parse , it returns nothing..i have saved the file as .xml and copied to local resource folder? NSString *xmlFilePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"samp.xml"]; NSString *xmlFileContents = [NSString stringWithContentsOfFile:xmlFilePath]; NSData *data = [NSData dataWithBytes:[xmlFileContents UTF8String] length:[xmlFileContents lengthOfBytesUsingEncoding: NSUTF8StringEncoding]]; NSString *content=[[NSString alloc] initWithBytes:[data bytes] length:[data length] encoding:NSUTF8StringEncoding]; NSLog(@"%@",content);

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Easy XPath question for iPhone

- by Sam

Hey guys! This is driving me NUTS! Here's my XML document <?xml version="1.0" encoding="UTF-8"?> <container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container"> <rootfiles> <rootfile full-path="content.opf" media-type="application/oebps-package+xml"/> </rootfiles> </container> All I want to do is get the root file element. I'm using TouchXML on the iPhone and here is my xPath query: /container/rootfiles/rootfile It doesn't work! I've tried everything. Any help would be appreciated... Sam

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Protocol Buffers In C#: How Are Boxed Value Types Handled

- by Greg Dean

In the following examples: public class RowData { public object[] Values; } public class FieldData { public object Value; } I am curious as how either protobuf-net or dotnet-protobufs would handle such classes. I am more familiar with protobuf-net, so what I actually have is: [ProtoContract] public class RowData { [ProtoMember(1)] public object[] Values; } [ProtoContract] public class FieldData { [ProtoMember(1)] public object Value; } However I get an error saying "No suitable Default Object encoding found". Is there an easy way to treat these classes, that I am just not aware of? To elaborate more on the use case: This is a scaled down version of a data class used in remoting. So essentially it looks like this: FieldData data = new FieldData(); data.Value = 8; remoteObject.DoSomething(data); Note: I've omitted the ISerializable implementation for simplicity, but it is as you'd expect.

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Requires a valid Date or x-amz-date header?

- by Jordan Messina

I'm getting the following error when attempting to upload a file to S3: S3StorageError: <?xml version="1.0" encoding="UTF-8"?> <Error><Code>AccessDenied</Code><Message>AWS authentication requires a valid Date or x-amz-date header</Message><RequestId>7910FF83F3FE17E2</RequestId><HostId>EjycXTgSwUkx19YNkpAoY2UDDur/0d5SMvGJUicpN6qCZFa2OuqcpibIR3NJ2WKB</HostId></Error> I'm using Django with Django-Storages and Imagekit My S3 settings in my settings.py looks as follows: locale.setlocale(locale.LC_TIME, 'en_US') DEFAULT_FILE_STORAGE = 'backends.s3.S3Storage' AWS_ACCESS_KEY_ID = '************************' AWS_SECRET_ACCESS_KEY = '*****************************' AWS_STORAGE_BUCKET_NAME = 'static.blabla.com' AWS_HEADERS = { 'x-amz-date': datetime.datetime.utcnow().strftime('%a, %d %b %Y %H:%M:%S GMT'), 'Expires': 'Thu, 15 Apr 2200 20:00:00 GMT', } from S3 import CallingFormat AWS_CALLING_FORMAT = CallingFormat.SUBDOMAIN Thanks for any help you can give!

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Accents in file name using Java on Solaris

- by Stef

I have a problem where I can't write files with accents in the file name on Solaris. Given following code public static void main(String[] args) { System.out.println("Charset = "+ Charset.defaultCharset().toString()); System.out.println("testéörtkuoë"); FileWriter fw = null; try { fw = new FileWriter("testéörtkuoë"); fw.write("testéörtkuoëéörtkuoë"); fw.close(); I get following output Charset = ISO-8859-1 test??rtkuo? and I get a file called "test??rtkuo?" Based on info I found on StackOverflow, I tried to call the Java app by adding "-Dfile.encoding=UTF-8" at startup. This returns following output Charset = UTF-8 testéörtkuoë But the filename is still "test??rtkuo?" Any help is much appreciated. Stef

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problem with asf writer

- by hatham

Im trying to encode raw data(both video frame and audio sample) into .asf file, using asf writer filter in directshow. my filter graph structure: raw_send_filter - asf writer filter raw_send_filter implements CBaseFilter and CBaseOutputPin. It plays a role as source filter which get raw data, then deliver them to ASF writer filter. The process follows these steps: Get deliver buffer (return into "sample") , using the function CBaseOutputPin::GetDeliveryBuffer sample-GetPointer(&buffer); Set time stamp (with frame rate = 30 fps) deliver sample The problem is after encode some raw data, I can not deliver any more. I can encode .avi file with this way, using Avi mux filter. Can u tell me why I can not deliver samples after encoding some? Thanks.

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How to convert *.aspx (HTML) page to Image format

- by Swapnil Fegade

I want to convert *.aspx (HTML) page's (User Interface) to Image such as JPEG. I am using below code for that Protected Sub btnGet_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnGet.Click saveURLToImage("http://google.co.in") End Sub Private Sub saveURLToImage(ByVal url As String) If Not String.IsNullOrEmpty(url) Then Dim content As String = "" Dim webRequest__1 As System.Net.WebRequest = WebRequest.Create(url) Dim webResponse As System.Net.WebResponse = webRequest__1.GetResponse() Dim sr As System.IO.StreamReader = New StreamReader(webResponse.GetResponseStream(), System.Text.Encoding.GetEncoding("UTF-8")) content = sr.ReadToEnd() 'save to file Dim b As Byte() = Convert.FromBase64String(content) Dim ms As New System.IO.MemoryStream(b, 0, b.Length) Dim img As System.Drawing.Image = System.Drawing.Image.FromStream(ms) img.Save("c:\pic.jpg", System.Drawing.Imaging.ImageFormat.Jpeg) img.Dispose() ms.Close() End If End Sub But I am getting Error as "Invalid character in a Base-64 string" at line Dim b As Byte() = Convert.FromBase64String(content)

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CREATE mysql database with default InnoDB tables?

- by memilanuk

Hello, I've been working on writing a SQL statement to create a MySQL database with several default options, including default character set and default collate. Is it possible to add syntax to make the default engine type for tables in this database to be innodb? I've been looking through the MySQL manual for v.5.1 and I've found the statement 'ENGINE=innodb' which would be appended to a CREATE TABLE statement... but I haven't found anything related to a CREATE DATABASE statement. Is there a normal way to do this as part of the database creation, or does it need to be specified on a table-by-table basis? Thanks, Monte

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python unichr problem

- by jacob

I've got some problem with unichr() on my server. Please see below: On my server (Ubuntu 9.04): >>> print unichr(255) Traceback (most recent call last): File "<stdin>", line 1, in <module> UnicodeEncodeError: 'ascii' codec can't encode character u'\xff' in position 0: ordinal not in range(128) On my desktop (Ubuntu 9.10): >>> print unichr(255) ÿ I'm fairly new to python so I don't know how to solve this. Anyone care to help? Thanks.

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JNI unsigned char to byte array

- by Jeff Storey

I'm working with a C++ library that stores image byte data in an array of unsigned characters. My jni function returns a jByteArray (which then gets converted to a BufferedImage on the java side), but I'm not sure how to fill the jByteArray from the unsigned character array (if it is possible). Can anyone provide a snippet for this last part to basically do this: // size is the size of the unsigned char array const int size = 100; unsigned char* buf = new unsigned char[size]; // buf gets passed to another library here to be populated jbyteArray bArray = env->NewByteArray(size); // now how do I get the data from buf to bArray? Thanks, Jeff

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excanvas throws me errors in IE

- by oshafran

Hi I am using excanvas.js that is used with flot jquery graphs. When in FF or chrome the graphs show great. on IE I get this error: Unknown runtime error excanvas.min.js, line 144 character 21 el.getContext = getContext; // Remove fallback content. There is no way to hide text nodes so we // just remove all childNodes. We could hide all elements and remove // text nodes but who really cares about the fallback content. el.innerHTML = ''; el in the stack is DispHTMLUnknownElement What can that be? Thank you?

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