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  • Implementing Brainf*ck loops in an interpreter

    - by sub
    I want to build a Brainf*ck (Damn that name) interpreter in my freshly created programming language to prove it's turing-completeness. Now, everything is clear so far (<+-,.) - except one thing: The loops ([]). I assume that you know the (extremely hard) BF syntax from here on: How do I implement the BF loops in my interpreter? How could the pseudocode look like? What should I do when the interpreter reaches a loop beginning ([) or a loop end (])? Checking if the loop should continue or stop is not the problem (current cell==0), but: When and where do I have to check? How to know where the loop beginning is located? How to handle nested loops? As loops can be nested I suppose that I can't just use a variable containing the starting position of the current loop. I've seen very small BF interpreters implemented in various languages, I wonder how they managed to get the loops working but can't figure it out.

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  • jQuery parent of a parent

    - by Bloudermilk
    Hello, I am currently trying to find the parent of a parent of an element. I have a link being clicked that is in a <td>, and I'd like to get the <tr> object. Why wont "$(this).parent().parent()" work? What will? Thanks, Brendan Edit: It appears an error in my syntax was throwing the whole thing off. "$(this).parent().parent()" does in fact work, but I wound up going with $(this).closest('tr')" because it seems like the most efficient solution.

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  • sed regex to match ['', 'WR' or 'RN'] + 2-4 digits

    - by Karl
    Hi I'm trying to do some conditional text processing on Unix and struggling with the syntax. I want to acheive Find the first 2, 3 or 4 digits in the string if 2 characters before the found digits are 'WR' (could also be lower case) Variable = the string we've found (e.g. WR1234) Type = "work request" else if 2 characters before the found digits are 'RN' (could also be lower case) Variable = the string we've found (e.g. RN1234) Type = "release note" else Variable = "WR" + the string we've found (Prepend 'WR' to the digits) Type = "Work request" fi fi I'm doing this in a Bash shell on Red Hat Enterprise Linux Server release 5.5 (Tikanga) Thanks in advance, Karl

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  • map xml element to xsd complexType based on attribute

    - by Joshua Johnson
    Assume there exists an XML instance document that looks like this: <root> <object type="foo"> <!-- ... --> </object> <object type="bar"> <!-- ... --> </object> </root> My goal is to have a small (static) schema that verifies proper <element type="xxx" /> syntax for objects, and another schema (more prone to change) that verifies the contents of each object element against a complexType that matches the type attribute: <complexType name="foo"><!--should match object with type="foo"--></complexType> <complexType name="bar"><!--should match object with type="bar"--></complexType> What is the best way to accomplish this (or something similar)?

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  • Set query FROM table using report parameter in BIRT

    - by Adam
    Hi, I am using the BIRT report writer, and I have multiple tables with the same data structure. In my report design, I want to select the table my query uses as a report parameter (as part of a mysql query in the data set) -- but I can't figure it out. When I create the data set, it's great that I can use parameters in the form of SELECT * FROM WHERE ?, and set these to report parameters, but I get an error if I set the ? to the table, such as: SELECT * FROM ? WHERE 1 Is there another way I can do this? As it's java, I assume the syntax follows that of a PreparedStatement. In BIRT 2.5 there is a property binding option under the data set dialog... and I've tried setting my query as: "SELECT * FROM "+params["DataTable"].value+" WHERE 1", but that was also results in an error.

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  • Error in Jaclplus component

    - by Aruna
    Hi, I am working on Joomla 1.5 and our site is using the Bluehost server.Till March 9th, 2010 our site was working perfectly.And on March 10th,2010 , the following error was shown in the site as Warning: Unexpected character in input: '' (ASCII=28) state=1 in /home1/tcscoinc/public_html/tcsrnd/administrator/components/com_jaclplus/jac lplus.class.php on line 73 Parse error: syntax error, unexpected T_STRING in /home1/tcscoinc/public_html/tcsrnd/administrator/components/com_jaclplus/jac lplus.class.php on line 73 For time being, i have just renamed the file jaclplus.class.php to make the site to function. As we are using Jaclplus component and we have purchased the Jaclplus component from Byos Tech , i have checked in the membership details.And we found that our Membership has been expired on 03/10/2010 . I have asked them but they had replied that it may not be a problem on membership. Please anyone share what can be the reason for the error.I am not able to open that file(jaclplus.class.php) since its a binary file.

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  • XAMPP Mercurial installation on Windows Apache --> HgWebDir.cgi Script Error

    - by Tim
    I try to publish multiple existing mercurial repository-locations though XAMPP Apache via CGI Python script hgwebdir.cgi ... as in this tutorial http://mercurial.selenic.com/wiki/HgWebDirStepByStep I get the following error from the apache error logs, when I try to access the repository path with a browser: Premature end of script headers: hgwebdir.cgi [Tue Apr 20 16:00:50 2010] [error] [client 91.67.44.216] Premature end of script headers: hgwebdir.cgi [Tue Apr 20 16:00:50 2010] [error] [client 91.67.44.216] File "C:/hostdir/xampp/cgi-bin/hg/hgwebdir.cgi", line 39\r [Tue Apr 20 16:00:50 2010] [error] [client 91.67.44.216] test = c:/hostdir/mercurial/test/\r [Tue Apr 20 16:00:50 2010] [error] [client 91.67.44.216] ^\r [Tue Apr 20 16:00:50 2010] [error] [client 91.67.44.216] SyntaxError: invalid syntax\r This is the path of the file where the script fails (and if I remove it, I get an empty HTML page shown with no visual elements in it): [paths] test = c:/hostdir/mercurial/test/ /hg = c:/hostdir/mercurial/** / = c:/hostdir/mercurial/ Does anybody have a clue for me?

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  • excel import query error

    - by pmms
    mysql_connect("localhost","root",""); mysql_select_db("hitnrunf_db"); $result=mysql_query("select * from jos_users INTO OUTFILE 'users.csv' FIELDS ESCAPED BY '""' TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n' "); header("Content-type: text/plain"); header("Content-Disposition: attachment; filename=your_desired_name.xls"); header("Content-Transfer-Encoding: binary"); header("Pragma: no-cache"); header("Expires: 0"); print "$header\n$data"; in the above code in query string i.e string in side mysql_quey we are getting following error Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING in C:\wamp\www\samples\mysql_excel\exel_outfile.php on line 8 in query string '\n' charter is not identifying as string thats why above error getting

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  • Microsoft SQL Server 2005 - using the modulo operator

    - by cc0
    So I have a silly problem, I have not used much SQL Server before, or any SQL for that matter. I basically have a minor mathematical problem that I need solved, and I thought modulo would be good. I have a number of dates in the database, but I need them be rounded off to the closest [dynamic integer] (could be anything from 0 to 5000000) which will be input as a parameter each time this query is called. So I thought I'd use modulo to find the remainder, then subtract that remainder from the date. If there is a better way, or an integrated function, please let me know! What would be the syntax for that? I've tried a lot of things, but I keep getting error messages like integers/floats/decimals can't be used with the modulo operators. I tried casting to all kinds of numeric datatypes. Any help would be appreciated.

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  • Python noob question - why is my simple regex not working?

    - by coson
    Good Day, I have a simple Python question that I'm having brain freeze on. This code snippet works. But when I substitue "258 494-3929" with phoneNumber, I get the following error below: # Compare phone number phone_pattern = '^\d{3} ?\d{3}-\d{4}$' # phoneNumber = str(input("Please enter a phone number: ")) if re.search(phone_pattern, "258 494-3929"): print "Pattern matches" else: print "Pattern doesn't match!" ####################################################### Pattern does not match Please enter a phone number: 258 494-3929 Traceback (most recent call last): File "pattern_match.py", line 16, in phoneNumber = str(input("Please enter a phone number: ")) File "", line 1 258 494-3929 ^ SyntaxError: invalid syntax C:\Users\Developer\Documents\PythonDemo btw. I did import re and tried using rstrip in case of the \n What else could I be missing? TIA, coson

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  • Which revision of html5lib is stable?

    - by Mat
    html5lib notes that it's latest release (0.11) is somewhat old. Using the Python portion, I have recursion problems as noted in Issue 70 and Issue 59 but can't find a recent Mercurial revision that is stable. The latest tip is no good, I got the following error from python setup.py install: byte-compiling build/bdist.linux-x86_64/egg/html5lib/treewalkers/_base.py to _base.pyc File "build/bdist.linux-x86_64/egg/html5lib/treewalkers/_base.py", line 40 "data": []} ^ SyntaxError: invalid syntax And I get the following errors at runtime: soup = parser.parse(page.read()) File "build/bdist.linux-x86_64/egg/html5lib/html5parser.py", line 165, in parse File "build/bdist.linux-x86_64/egg/html5lib/html5parser.py", line 144, in _parse File "build/bdist.linux-x86_64/egg/html5lib/html5parser.py", line 454, in processDoctype TypeError: insertDoctype() takes exactly 4 arguments (2 given) I'm using it on Python 2.5.2 with lxml and BeautifulSoup.

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  • Help in XPath expression

    - by Ashish Gupta
    I have an XML document which contains nodes like following:- <a class="custom">test</a> <a class="xyz"></a> I was tryng to get the nodes for which class is NOT "Custom" and I wrote an expression like following:- XmlNodeList nodeList = document.SelectNodes("//*[self::A[@class!='custom'] or self::a[@class!='custom']]"); Now, I want to get IMG tags as well and I want to add the following experession as well to the above expression:- //*[self::IMG or self::img] ...so that I get all the IMG nodes as well and any tag other than having "custom" as value in the class attribute. Any help will be appreciated. EDIT :- I tried the following and this is an invalid syntax as this returns a boolean and not any nodelist:- XmlNodeList nodeList = document.SelectNodes("//*[self::A[@class!='custom'] or self::a[@class!='custom']] && [self::IMG or self::img]");

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  • How do I flip a column in mysql that has data structured: 'last name, first name'?

    - by ggg
    I want to create a new column in a MYSQL table that has Fn Ln instead of Ln, Fn. Most of my data is printed Fn Ln. Another idea is to incorporate a string function each time there is an output (php based) but that seems to waste resources. Finally, I couldn't find the syntax (loop or foreach) for my php function anyway. Here is the working php function that I got from a previous post: $name = "Lastname, Firstname"; $names = explode(", ", $name); $name = $names[1] . " " . $names[0];

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  • Differences between Perl and PHP

    - by lok
    I'm planning to lern Perl 5 and as I have only used PHP until now, I wanted to know a bit about how the languages differ from each other. As PHP started out as a set of "Perl hacks" it has obviously cloned some of Perls features. What are the main differences in the syntax? Is it true that with Perl you have more options and ways to express something? Why is Perl not used for dynamic websites very often anymore? What made PHP gain more popularity than it?

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  • Passing more than 1 form field

    - by cf_PhillipSenn
    I'm trying to update the LastName field for PersonID. I can pass PersonID, but I don't know the syntax for also passing the LastName field. $('input[name="LastName"]').live('focusout', function() { var PersonID = $(this).parents("tr").attr("ID"); var LastName = $(this).val(); // todo: serialize $.ajax({ url:'Remote/Person.cfc?method=UpdateLastName&returnformat=json' ,data:'PersonID='+PersonID }); $(this).parents("td").empty().append(LastName); }); Q: Is is something like data:{'PersonID='+PersonID,'LastName='+LastName} Am I missing a squiggly line or a parenthesis or comma or dot or colon or semi-colon or something?

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  • PHP - Opening uploaded DOCX files with the correct MIME TYPE

    - by user270797
    I have users uploading DOCX files which I make available for download. The issues we have been experiencing is the unknown mime types of DOCX files which causes IE to open these docs as Zip files. It is running on a Windows/IIS server. Because this is a shared host, I cannot change any server settings. I was thinking that I could just write some code that would handle DOCX files, perhaps custom output: if (extension=docx) { header("Content-Disposition: attachment; etc) header('Content-Type: application/application/vnd.openxmlformats-officedocument.wordprocessingml.document'); Output the file contents etc } Would this be a viable solution?? If so, can someone help fill in the gaps? (PS I know the above syntax is not correct, just a quick example)

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  • HTML text-area editor for code that traps TAB key

    - by Cristi Cotovan
    Hello, I have looked for months now, for JavaScript-based HTML editor I can embed onto my web pages to replace a TEXTAREA, but to enable me to edit CODE in a friendly, closer to a real editor, way. All editors I've tried (RadEditor from Telerik, FCKEditor, TinyMCE, etc etc), do not trap the TAB key, very useful when editing HTML code onto a page, to help format the code properly. I'm not talking about syntax highlighting, as that would be an awesome plus. But I am mainly wondering if there is such an editor. I'd appreciate being pointed in the right direction.

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  • Regex Problem in PHP

    - by Chris
    I'm attempting to utilize the following Regex pattern: $regex = '/Name: [a-zA-Z ]*] [0-9]/'; When testing it in Rubular, it works fine, but when using PHP the expression never returns true, even when it should. Incidentally, if I remove the "[0-9]" part, it works fine. Is there some difference in PHP's regex syntax that I'm overlooking? Edit: I'm looking for the characters "Name:" then a name containing any number of letters or spaces, then a "]", then a space, then a single number. So "Name: Chris] 5" would return true and "Name: Chris] [lorem ipsum]" should return false. I also tried escaping the second bracket "\[" but this did not fix the problem.

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  • Getting Unexpected '<' in simple less than greater than comparison

    - by Elizabeth Buckwalter
    I feel very very very silly posting this, but I can't find the answer. I've searched google and here. // originally values in a multi dimensional array, but used simple values // to rule out errors. $somenumber = 1; $anotherone=5; if ($somenumber < $res->shares < $anotherone ) { blah } Get the error: Parse error: syntax error, unexpected '<' Seems pretty simple and straight forward. Is there some weird thing that you can't compare multiple values? Do I have to explicitly type? It works in Perl. Which of course means that it has to work like this in everything else. ;)

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  • Csharp component which generates fragmens with highlights for diffs for 2 strings

    - by MicMit
    I need C# equivalent ( ideally open source ) which is similar to Delphi DLL. I am currently using the wrapper ( C# syntax is provided , but it is a call from a different language ) zdiff( string ref str1, string ref str2, int range , int trim ) it calls inside str1 = GetHiDiff(@str1,1,trim) str2 = GetHiDiff(@str1,2,trim) where function GetHiDiff(s:pchar; sIndex:integer; wtrim:integer): pchar; stdcall; What it does it returns a left fragment html of str1 and a right html fragment of str2 with diffs highlighted as strings are passed by reference. Range parameter determines the size of html fragment. Not sure what trim 0 does.

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  • Adding LDAP OU using Net::LDAP

    - by lupindeterd
    What is the correct syntax of adding an OU using Net::LDAP, I tried the following: #!/usr/bin/perl -w use 5.10.1; use strict; use Net::LDAP; use Data::Dumper; my $ldap = Net::LDAP->new("192.168.183.2") or die "$@"; my $mesg = $ldap->bind( "cn=admin,dc=lab,dc=net", password => 'xxx' ); $mesg = $ldap->add( "ou=Users,dc=lab,dc=net", attrs => [ 'ou' => 'dc=Users', 'objectClass' => [ 'top', 'organizationalUnit' ] ] ); say $mesg->error; say $mesg->code; And got the following error: value of naming attribute 'ou' is not present in entry 64 However using the ldapmodify command line, and using this following ldif, works: dn: ou=Users,dc=lab,dc=net changetype: add objectclass: top objectclass: organizationalUnit ou: Users

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  • Haskell typeclass

    - by Geoff
    I have a Haskell typeclass question. I can't munge the syntax to get this (seemingly reasonable) program to compile under GHC. import Control.Concurrent.MVar blah1 :: [a] -> IO ([a]) blah1 = return blah2 :: [a] -> IO (MVar [a]) blah2 = newMVar class Blah b where blah :: [a] -> IO (b a) instance Blah [] where blah = blah1 -- BOOM instance Blah (MVar []) where blah = blah2 main :: IO () main = do putStrLn "Ok" I get the following error message, which kind of makes sense, but I don't know how to fix it: `[]' is not applied to enough type arguments Expected kind `*', but `[]' has kind `* -> *' In the type `MVar []' In the instance declaration for `Blah (MVar [])'

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  • Mongomapper query collection problem

    - by kylemac
    When I define the User has_many meetings, it automatically creates a "user_id" key/value pair to relate to the User collections. Except I can't run any mongo_mapper finds using this value, without it returning nil or []. Meeting.first(:user_id = "1234") Meeting.all(:user_id = "1234") Meeting.find(:user_id = "1234") All return nil. Is there another syntax? Basically I can't run a query on the automatically generated associative ObjectId. # Methods class User include MongoMapper::Document key :user_name, String, :required = true key :password, String many :meetings end class Meeting include MongoMapper::Document key :name, String, :required = true key :count, Integer, :default = 1 end # Sinatra get '/add' do user = User.new user.meetings "foobar") #should read: Meeting.new(:name = "foobar") user.save end get '/find' do test = Meeting.first(:user_id = "4b4f9d6d348f82370b000001") #this is the _id of the newly create user p test # WTF! returns [] end

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  • iphlpapi / ifdef.h

    - by Mike D
    I'm trying to use iphlpapi (GetAdapterInfo) and am having trouble compiling the code. I have iphlpapi.h from SDK 7 and have added the appropriate path to the include files in visual studio. I get the following error... c:\program files\microsoft sdks\windows\v7.0\include\ifdef.h(154) : error C2146: syntax error : missing ';' before identifier 'NET_IFTYPE' The lines in ifdef where this occurs are shown below. typedef NET_LUID IF_LUID, *PIF_LUID; typedef ULONG NET_IFINDEX, *PNET_IFINDEX; // Interface Index (ifIndex) typedef UINT16 NET_IFTYPE, *PNET_IFTYPE; // Interface Type (IANA ifType)

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  • MySQL Stored Procedure: Boolean Logic in IF THEN

    - by xncroft
    I'm looking for the proper syntax (if this is possible in MySQL stored procedures) for using logical operators in an IF THEN statement. Here's something along the lines of what I would like to do, but I'm not certain if I should type "OR" or "||" in the IF ... THEN clause: DELIMITER $$ CREATE PROCEDURE `MyStoredProc` (_id INT) BEGIN DECLARE testVal1 INT DEFAULT 0; DECLARE testVal2 INT DEFAULT 0; SELECT value1, value2 INTO testVal1, testVal2 FROM ValueTable WHERE id = _id; IF testVal1 > 0 OR testVal2 > 0 THEN UPDATE ValueTable SET value1 = (value1+1) WHERE id=_id; END IF; END$$

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