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• Recommendations on Triming Large Amounts of Text from a DOM Object

  - by aronchick

  I'm doing some in browser editing, and I have some content that's on the order of around 20k characters long in a <pre>. So it looks something like: <pre> Text 1 Text 2 Text 3 Text 4 [...] Text 20,000 </pre> I'd like to use jquery to trim it down when someone hits a button to chop, but I'm having trouble doing it without overloading the browser. Assume I know that the character numbers are at 16,510 - 17,888, and what I'd like to do is trim it. I was using: jQuery('#textsection').html(jQuery('textarea').html().substr(range.start)); But browsers seem to enjoy crashing when I do this. Alternatives?

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• Check malicious Redirect URL in ASP.NET

  - by acidzombie24

  I heard of sites using other site to redirect users either to their own site or to hide behind another site. In my code i redirect in a few places such as post a comment (its easier to use a return url then figure out the page using data given). How do i check if the return URL is my own url? I think i use absolute paths so i can easily check if the first character is '/' but then i will lose relative flexibility. This also disallows me from doing http://mysite.com/blah in the redirect url. I could patch the url by adding mysite + string but i'll need to figure out if string is a relative url or already a mysite.com url. Whats the easiest way to ensure i am only redirecting to my site?

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• Algorithms to find longest common prefix in a sliding window.

  - by nn

  Hi, I have written a Lempel Ziv compressor and decompressor. I am seeking to improve the time to search the dictionary for a phrase. I have considered K-M-P and Boyer-Moore, but I think an algorithm that adapts to changes in the dictionary would be faster. I've been reading that binary search trees (AVL or with splays) improve the performance of compression time considerably. What I fail to understand is how to bootstrap the binary search tree and insert/remove data. I'm not actually quite sure the significance of each node in the binary search. I am searching for phrases so will each character be considered a node? Also how and what is inserted/removed from the search tree as new data enters the dictionary and old data is removed? The binary search tree sounds like a good payoff since it can adapt to the dictionary, but I'm just not quite sure of how it's used.

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• PostScript versus PDF as an output format

  - by Brecht Machiels

  I'm currently writing a typesetting application and I'm using PSG as the backend for producing postscript files. I'm now wondering whether that choice makes sense. It seems the ReportLab Toolkit offers all the features PSG offers, and more. ReportLab outputs PDF however. Advantages PDF offers: transparancy better support for character encodings (Unicode, for example) ability to embed TrueType and even OpenType fonts hyperlinks and bookmarks Is there any reason to use Postscript instead of directly outputting to PDF? While Postscript is a full programming language as opposed to PDF, as a basic output format for documents, that doesn't seem to offer any advantage. I assume a PDF can be readily converted to PostScript for printing? Some useful links: Wikipedia: PDF Adobe: PostScript vs. PDF

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• Trying to understand strtok

  - by Karthick

  Consider the following snippet that uses strtok to split the string madddy. char* str = (char*) malloc(sizeof("Madddy")); strcpy(str,"Madddy"); char* tmp = strtok(str,"d"); std::cout<<tmp; do { std::cout<<tmp; tmp=strtok(NULL, "dddy"); }while(tmp!=NULL); It works fine, the output is Ma. But by modifying the strtok to the following, tmp=strtok(NULL, "ay"); The output becomes Madd. So how does strtok exactly work? I have this question because I expected strtok to take each and every character that is in the delimiter string to be taken as a delimiter. But in certain cases it is doing that way but in few cases, it is giving unexpected results. Could anyone help me understand this?

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• Use case modelling for calculator

  - by kyrogue

  hi, i need help modelling a use case diagram from a topic, it will be in java GUI Design a Calculator that 1.Allow user to key in a legitimate arithmetic statement that involves number, operator +, - and bracket '(' and ')' ; 2.When user press “Calculate” button, display result; 3.Some legitimate statement would be ((3+2)-4+2) (equals 3) and (-2+3)-(3-1) (equals -1); 4.You should NOT use a pre-existing function that just take in the statement as a parameter and returns the result but you should write the logic of parsing every character in your code. 5.Store the last statement and answer so it is displayed when user press the “Last calculation” button. i have designed two use case diagrams using UML on netbeans 6.5.1, one of the use case i am not sure whether is it containing too much use cases etc, while the other is what i think could be too vague for the topic.i hope to get some feedback on whether the use case diagram are appropriate, thanks.

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• How to post Arabic characters in PHP

  - by Peter Stuart

  Okay, So I am writing an OpenCart extension that must allow Arabic characters when posting data. Whenever I post ????? the print_r($_POST) returns with this: u0645u0631u062du0628u0627 I check the HTML header and it has this: <meta charset="UTF-8" /> I checked the PHP file that triggers all SQL queries and it has this code: mysql_query("SET NAMES 'utf8'", $this->link); mysql_query("SET CHARACTER SET utf8", $this->link); mysql_query("SET CHARACTER_SET_CONNECTION=utf8", $this->link); This is in my form tag: <form action="<?php echo $action; ?>" method="post" enctype="multipart/form-data" id="form" accept-charset="utf-8"> I can't think of what else I am doing wrong. The rest of the OpenCart framework supports UTF8 and arabic characters. It is just in this instance where I can't post anything arabic? Could someone please help me? Many Thanks Peter

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• Serializing array in PHP, preventing injection

  - by Cyclone

  I'm writing a PHP script which uses serialized arrays to store data. How can I prevent injection in serialization? It would be very easy to name your account: something";s:6:"access";s:5:"admin"; for a simple example. The user could then add the rest of the needed parameters somehow. Would addslashes work for this? Does the php unserialize pick up on that as being an escaped character? If so, is it possible to apply addslashes to an entire array without iterating through? Thanks for the help!

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• Why is sql server giving a conversion error when submitting date.today to a datetime column?

  - by kpierce8

  I am getting a conversion error every time I try to submit a date value to sql server. The column in sql server is a datetime and in vb I'm using Date.today to pass to my parameterized query. I keep getting a sql exception Conversion failed when converting datetime from character string. Here's the code Public Sub ResetOrder(ByVal connectionString As String) Dim strSQL As String Dim cn As New SqlConnection(connectionString) cn.Open() strSQL = "DELETE Tasks WHERE ProjID = @ProjectID" Dim cmd As New SqlCommand(strSQL, cn) cmd.Parameters.AddWithValue("ProjectID", 5) cmd.ExecuteNonQuery() strSQL = "INSERT INTO Tasks (ProjID, DueDate, TaskName) VALUES " & _ " (@ProjID, @TaskName, @DueDate)" Dim cmd2 As New SqlCommand(strSQL, cn) cmd2.CommandText = strSQL cmd2.Parameters.AddWithValue("ProjID", 5) cmd2.Parameters.AddWithValue("DueDate", Date.Today) cmd2.Parameters.AddWithValue("TaskName", "bob") cmd2.ExecuteNonQuery() cn.Close() DataGridView1.DataSource = ds.Projects DataGridView2.DataSource = ds.Tasks End Sub Any thoughts would be greatly appreciated.

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• Truncate a UTF-8 string to fit a given byte count in PHP

  - by fsb

  Say we have a UTF-8 string $s and we need to shorten it so it can be stored in N bytes. Blindly truncating it to N bytes could mess it up. But decoding it to find the character boundaries is a drag. Is there a tidy way? [Edit 20100414] In addition to S.Mark’s answer: mb_strcut(), I recently found another function to do the job: grapheme_extract($s, $n, GRAPHEME_EXTR_MAXBYTES); from the intl extension. Since intl is an ICU wrapper, I have a lot of confidence in it.

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• Selenium: How to enter white space as the value of a text field?

  - by Andrew

  I have a form text field that is being populated with a default value. I would like to clear the value and enter white space to assert that the expected validation occurs. I am using Selenium RC and the PHPUnit Selenium extension. How can I achieve this? Note: I have already tried doing these, but they do not work: $this->type('FirstName', " "); //spaces $this->type('FirstName', "\t"); //tab character They clear the value from the field, but they do not enter the white space into the field.

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• unterminated string literal on json eval

  - by sonam

  I am trying to eval() a json having speacial characters - 
 and getting "unterminated string literal" error in Firefox 3.5.9 Although the same works fine on IE. 7. I have set the character encoding to UTF-8 in both the browsers. Any idea why its an error in FF? Also right before converting the String to JSON, I ran this code in java String jsonString = //some json string having 
 for(byte b : jsonString.getBytes()){ System.out.print(Integer.toHexString(b) + " "); } net.sf.json.JSON jsonObject = net.sf.json.JSONSerializer.toJSON(jsonString); And the o/p for above characters is ffffffe2 ffffff80 ffffffa8 respectively. How do I know if these are valid UTF-8 characters?

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• python sax error "junk after document element"

  - by user293487

  Hi, I use python sax to parse xml file. The xml file is actually a combination of multiple xml files. It looks like as follows: <row name="abc" age="40" body="blalalala..." creationdate="03/10/10" /> <row name="bcd" age="50" body="blalalala..." creationdate="03/10/09" /> My python code is in the following. It show "junk after document element" error. Any good idea to solve this problem. Thanks. from xml.sax.handler import ContentHandler from xml.sax import make_parser,SAXException import sys class PostHandler (ContentHandler): def __init__(self): self.find = 0 self.buffer = '' self.mapping={} def startElement(self,name,attrs): if name == 'row': self.find = 1 self.body = attrs["body"] print attrs["body"] def character(self,data): if self.find==1: self.buffer+=data def endElement(self,name): if self.find == 1: self.mapping[self.body] = self.buffer print self.mapping parser = make_parser() handler = PostHandler() parser.setContentHandler(handler) try: parser.parse(open("2.xml")) except SAXException:

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• Why this code showing error in W3C validator?

  - by metal-gear-solid

  Why this code showing error in W3C validator "character data is not allowed here" <blockquote>all visible objects, man, are but as pasteboard masks. But in each event -- in the living act, the undoubted deed -- there, some unknown but still reasoning thing puts forth the mouldings of its feature from behind the unreasoning mask. If man will strike, strike through the mask. All visible objects, man, are but as pasteboard masks. But in each event -- in the living act, the undoubted deed -- there, some unknown but still reasoning thing puts forth the mouldings of its feature from behind the unreasoning mask. If man will strike, strike through the mask.</blockquote> It does not giving any error in this validator http://www.onlinewebcheck.com/ and not in https://addons.mozilla.org/en-US/firefox/addon/249/

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• Sed not working inside bash script

  - by Isabelle

  Hello. I believe this may be a simple question, but I've looked everywhere and tried some workarounds, but I still haven't solved the problem. Problem description: I have to replace a character inside a file and I can do it easily using the command line: sed -e 's/pattern1/pattern2/g' full_path_to_file/file But when I use the same line inside a bash script I can't seem to be able to replace it, and I don't get an error message, just the file contents without the substitution. #!/bin/sh VAR1="patter1" VAR2="patter2" VAR3="full_path_to_file" sed -e 's/${VAR1}/${VAR2}/g' ${VAR3} Any help would be appreciated. Thank you very much for your time.

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• UTF-8 to ISO-8859-1 mapping / lossless conversion libraries in Java

  - by Pawel Krupinski

  I need to perform a conversion of characters from UTF-8 to ISO-8859-1 in Java without losing for example all of the UTF-8 specific punctuation. Ideally would like these to be converted to equivalents in ISO (e.g. there are probably 5 different single quotes in UTF-8 and would like them all converted to ISO single quote character). String.getBytes("ISO-8859-1") just won't do the trick in this case as it will lose the UTF-8-specific chars. Do you know of any ready mappings or libraries in Java that would map UTF-8 specific characters to ISO?

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• PHP convert latin1 to utf8 Persian txt

  - by root

  I now work on a web-base PHP app to work with a MySQL Server database . database is with Latin1 Character set and all Persian texts don't show properly . database is used with a windows software Show and Save Persian texts good . I don't want to change the charset because windows software work with that charset . Question: how can convert latin1 to utf8 to show and utf8 to latin1 for saving from my web-base PHP app , or using Persian/Arabic language on a latin1 charset database without problem ? note: one of my texts is ???? ?????? when save from my windows-based software save as ÇÍãÏ ÑÍãÇäí and still show with ???? ?????? in my old windows-based software image : image of database , charsets,collation and windows-based software

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• match at the beginning of any line, including the first

  - by JoelFan

  According the the Perl documentation on regexes: By default, the "^" character is guaranteed to match only the beginning of the string ... Embedded newlines will not be matched by "^" ... You may, however, wish to treat a string as a multi-line buffer, such that the "^" will match after any newline within the string ... you can do this by using the /m modifier on the pattern match operator. The "after any newline" part means that it will only match at the beginning of the 2nd and subsequent lines. What if I want to match at the beginning of any line (1st, 2nd, etc.)?

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• Javascript calls to an Ajax WebMethod. How to get multiple output params returned?

  - by George

  OK, I know how to call a simple old fashion asmx webservice webthod that returns a single value as a function return result. But what if I want to return multiple output params? My current approach is to separate the params by a dividing character and parse them on teh client. Is there a better way. Here's how I return a single function result. How do I return multiple output values? <asp:ScriptManager ID="ScriptManager1" runat="server"> <Services> <asp:ServiceReference Path="WebService.asmx" /> </Services> function CallHelloWebMethod() { WebService.Hello(OnComplete1, OnTimeOut, OnError); } function OnComplete1(arg) { alert(arg); } function OnTimeOut(arg) { } <WebMethod()> Public Function Hello(ByVal x As String) As String Return "Hello " & x End Function

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• Code Golf: Phone Number to Words

  - by Nick Hodges

  Guidelines for code-golf on SO We've all seen phone numbers that are put into words: 1-800-BUY-MORE, etc. What is the shortest amount of code you can write that will produce all the possible combinations of words for a 7 digit US phone number. Input will be a seven digit integer (or string, if that is simpler), and assume that the input is properly formed. Output will be a list of seven character strings that For instance, the number 428-5246 would produce GATJAGM GATJAGN GATJAGO GATJAHM GATJAHN GATJAHO and so on..... Winning criteria will be code from any language with the fewest characters that produce every possible letter combination. Additional Notes: To make it more interesting, words can be formed only by using the letters on a North American Classic Key Pad phone with three letters per number as defined here.That means that Z and Q are excluded. For the number '1', put a space. For the number '0', put a hyphen '-' Bonus points awarded for recognizing output as real English words. Okay, not really. ;-)

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• Twitter xAuth vs open source

  - by Yorirou

  Hi I am developing an open source desktop twitter client. I would like to take advantage on the new xAuth authentication method, however my app is open source which means that if I put the keys directly into the source file, it may be a vulnerability (am I correct? The twitter support guy told me). On the other hand, putting the key directly into a binary also doesn't make sense. I am writing my application in python, so if I just supply the pyc files, it is one more seconds to get the keys, thanks to the excellent reflection capatibilities of Python. If I create a small .so file with the keys, it is also trivial to obtain the key by looking at the raw binary (keys has fixed length and character set). What is your opinion? Is it really a secutiry hole to expose the API keys?

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• Can't find which row is causing conversion error

  - by Marwan

  I have the following table: CREATE TABLE [dbo].[Accounts1]( [AccountId] [nvarchar](50) NULL, [ExpiryDate] [nvarchar](50) NULL ) I am trying to convert nvarchar to datetime using this query: select convert(datetime, expirydate) from accounts I get this error: Conversion failed when converting datetime from character string. The status bar says "2390 rows". I go to rows 2390, 2391 and 2392. There is nothing wrong with the data there. I even try to convert those particular rows and it works. How can I find out which row(s) is causing the conversion error?

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• Upload and parse csv file with "universal newline" in python on Google App Engine

  - by greg

  Hi, I'm uploading a csv/tsv file from a form in GAE, and I try to parse the file with python csv module. Like describe here, uploaded files in GAE are strings. So I treat my uploaded string a file-like object : file = self.request.get('catalog') catalog = csv.reader(StringIO.StringIO(file),dialect=csv.excel_tab) But new lines in my files are not necessarily '\n' (thanks to excel..), and it generated an error : Error: new-line character seen in unquoted field - do you need to open the file in universal-newline mode? Does anyone know how to use StringIO.StringIO to treat strings like files open in universal-newline?

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• PostgreSQL String search for partial patterns removing exrtaneous characters

  - by tbrandao

  Looking for a simple SQL (PostgreSQL) regular expression or similar solution (maybe soundex) that will allow a flexible search. So that dashes, spaces and such are omitted during the search. As part of the search and only the raw characters are searched in the table.: Currently using: SELECT * FROM Productions WHERE part_no ~* '%search_term%' If user types UTR-1 it fails to bring up UTR1 or UTR 1 stored in the database. But the matches do not happen when a part_no has a dash and the user omits this character (or vice versa) EXAMPLE search for part UTR-1 should find all matches below. UTR1 UTR --1 UTR 1 any suggestions...

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• how to detect an escape sequence in a string

  - by mix

  Given a string named line whose raw version has this value: \rRAWSTRING how can I detect if it has the escape character \r? What I've tried is: if repr(line).startswith('\r'): blah... but it doesn't catch it. I also tried find, such as: if repr(line).find('\r') != -1: blah doesn't work either. What am I missing? thx! EDIT: thanks for all the replies and the corrections re terminolgy and sorry for the confusion. OK, if i do this print repr(line) then what it prints is: '\rSET ENABLE ACK\n' (including the single quotes). i have tried all the suggestions, including: line.startswith(r'\r') line.startswith('\\r') each of which returns False. also tried: line.find(r'\r') line.find('\\r') each of which returns -1

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