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  • Scheme Formatting Help

    - by Logan
    I've been working on a project for school that takes functions from a class file and turns them into object/classes. The assignment is all about object oriented programming in scheme. My problem however is that my code doesn't format right. The output it gives me whenever I give it a file to pass in wraps the methods of the class in a list, making it so that the class never really gets declared. I can't for the life of me figure out how to get the parenthesis wrapping the method list to remove. I would really appreciate any help. Below is the code and the class file. ;;;; PART1 --- A super-easy set of classes. Just models points and lines. Tests all of the ;; basics of class behavior without touching on anything particularly complex. (class pointInstance (parent:) (constructor_args:) (ivars: (myx 1) (myy 2)) (methods: (getx () myx) (gety () myy) (setx (x) (set! myx x)) (show () (begin (display "[") (display myx) (display ",") (display myy) (display "]"))) )) (require (lib "trace.ss")) ;; Continue reading until you hit the end of the file, all the while ;; building a list with the contents (define load-file (lambda (port) (let ((rec (read port))) (if (eof-object? rec) '() (cons rec (load-file port)))))) ;; Open a port based on a file name using open-input-file (define (load fname) (let ((fport (open-input-file fname))) (load-file fport))) ;(define lis (load "C:\\Users\\Logan\\Desktop\\simpletest.txt")) ;(define lis (load "C:\\Users\\Logan\\Desktop\\complextest.txt")) (define lis (load "C:\\Users\\Logan\\Desktop\\pointinstance.txt")) ;(display (cdaddr (cdddar lis))) (define makeMethodList (lambda (listToMake retList) ;(display listToMake) (cond [(null? listToMake) retList ;(display "The list passed in to parse was null") ] [else (makeMethodList (cdr listToMake) (append retList (list (getMethodLine listToMake)))) ] ) )) ;(trace makeMethodList) ;this works provided you just pass in the function line (define getMethodLine (lambda (functionList) `((eq? (car msg) ,(caar functionList)) ,(caddar functionList)))) (define load-classes (lambda paramList (cond [(null? paramList) (display "Your parameters are null, man.")] [(null? (car paramList))(display "Done creating class definitions.")] [(not (null? (car paramList))) (begin (let* ((className (cadaar paramList)) (classInstanceVars (cdaddr (cddaar paramList))) (classMethodList (cdr (cadddr (cddaar paramList)))) (desiredMethodList (makeMethodList classMethodList '())) ) ;(display "Classname: ") ;(display className) ;(newline)(newline) ;(display "Class Instance Vars: ") ;(display classInstanceVars) ;(newline)(newline) ;(display "Class Method List: ") ;(display classMethodList) ;(newline) ;(display "Desired Method List: ") ;(display desiredMethodList)) ;(newline)(newline) ;---------------------------------------------------- ;do not delete the below code!` `(define ,className (let ,classInstanceVars (lambda msg ;return the function list here (cond ,(makeMethodList classMethodList '()))) )) ;--------------------------------------------------- ))] ) )) (load-classes lis) ;(load-classes lis) ;(load-classes-helper lis) ;(load-classes "simpletest.txt") ;(load-classes "complextest.txt") ;method list ;(display (cdr (cadddr (cddaar <class>))))

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  • How can I get a call stack listing in Perl?

    - by slashmais
    Is there a way I can access (for printout) a list of sub + module to arbitrary depth of sub-calls preceding a current position in a Perl script? I need to make changes to some Perl modules (.pm's). The workflow is initiated from a web-page thru a cgi-script, passing input through several modules/objects ending in the module where I need to use the data. Somewhere along the line the data got changed and I need to find out where.

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  • Generating a list of values a regex COULD match in Python

    - by mlissner
    I'm trying to use a regex as an input, and from there generate all the possible values that the regex would match. So, for example, if the regex is "three-letter words starting with a, and ending in c," then the code would generate a list with the values [aac, abc, acc, adc, a1c....]. Is there an easy way to do this? I'm using python.

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  • Why use a whitelist for HTML sanitizing?

    - by Carson Myers
    I've often wondered -- why use a whitelist as opposed to a blacklist when sanitizing HTML input? How many sneaky HTML tricks are there to open XSS vulnerabilities? Obviously script tags and frames are not allowed, and a whitelist would be used on the fields in HTML elements, but why disallow most of everything?

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  • Validating String Characters as Numeric w/ Pascal (FastReport 4)

    - by user2525015
    I'm new to Pascal and FastReport. This question can probably be answered without knowledge of FastReport. Pascal is Delphi. FastReport4. I have a text box accepting an 8 character string as input. Each character should be numeric. I'm attempting to validate each character as numeric. I've tried using the val function... Procedure Val(S : String; var R: Real; Code : Integer); begin end; procedure thisinputOnChange(Sender: TfrxComponent); var S : String; error : Integer; R : Real; begin S := thisinput.lines.text; Val (S, R, error); If error > 0 then Button2.enabled := False; end; I got this code online. The explanation says that the function will return an error with a code greater than zero if the character cannot be converted to an integer. Is that explanation correct? Am I misinterpreting? Right now I am trying to set a button's enabled property to false if the validation fails. I might change that to a message. For now, I would like to get it to work by setting the button property. I'm not sure if I should be using the onChange event or another event. I'm also not sure if I need to send the input to the val function in a loop. Like I said, I'm just learning how to use this function. I am able to validate the length. This code works... procedure thisinputOnChange(Sender: TfrxComponent); begin if length(thisinput.lines.text) = 8 then Button2.enabled := True; end; Any suggestions? Should I use the val function or something else? Let me know if I need to provide more info. I might not be able to check back until later, though. Thanks for any help.

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  • Error compiling Win32 API GUI code with MinGW

    - by Eric Larsen
    Hey guys, this is my first post. I'm just getting started with win32 API programming in C++ and I'm having trouble compiling the winnie tutorial (http://www.relisoft.com/win32/winnie.html) with MinGW. My input and output: C:\Users\Eric\Projects g++ winnie.cpp -o winnie.exe /mingw/lib/libmingw32.a(main.o):main.c:(.text+0xd2): undefined reference to 'WinMain@16' collect2: ld returned 1 exit status Any help would be very much appreciated.

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  • Best way to get all digits from a string with regex

    - by Chris Marisic
    Is there any better way to get take a string such as "(123) 455-2344" and get "1234552344" from it than doing this: var matches = Regex.Matches(input, @"[0-9]+", RegexOptions.Compiled); return String.Join(string.Empty, matches.Cast<Match>() .Select(x => x.Value).ToArray()); Perhaps a regex pattern that can do it in a single match? I couldn't seem to create one to achieve that though.

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  • Getting output of a shell script in Cocoa

    - by Tristan Seifert
    Is there a way that lets me run a shell script, and display the output in an NSTextView? I do not want any input from the user to the shell script at all, since is is just called to compile a buch of files. The shell script part works fine so far, but I just can't figure out how to run it and show the output in an NSTextView. I know a shell script can be run using system() and NSTask, but how do I get it's output into an NSTextView?

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  • Simulating Key Press event using Python for Linux

    - by user308827
    Hi, I am writing a script to automate running a particular model. When the model fails, it waits for a user input (Enter key). I can detect when the model has failed, but I am not able to use python (on linux) to simulate a key press event. Windows has the SendKeys library to do this but I was wondering if there is a similar library for python on linux. Thanks!

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  • Qt::X11BypassWindowManagerHint functionality on Windows

    - by Hector
    Hi I'm currently developing a cross-plataform virtual keyboard. In linux i was able to do whatever i want, but in Windows i'm having problems to prevent the widget to obtain the keyboard focus. In linux, using the window flag Qt::X11BypassWindowManagerHint the widget never gets the keyboard input, but of course, that flag does not work on Windows Is there something equivalent to that flag or some method i can use instead? any ideas would be appreciated thanks in advance

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  • Perl coding to PHP coding conversion

    - by Haskella
    Hi, I am trying to convert some Perl into PHP using this guideline: http://www.cs.wcupa.edu/~rkline/perl2php/#basedir Basically I know next to nothing about these two languages. Please give me some simple English explanation of what each line does, I'll be more than happy. Thanks for reading :D Perl CGI program: #!/usr/bin/perl -T use strict; use warnings; use CGI (); my %fruit_codes = ( apple => '2321.html', banana => '1234.html', coconut => '8889.html', ); my $c = CGI->new; my $fruit_parameter = $c->param('fruit_name'); my $iframe_document; if (defined $fruit_parameter and exists $fruit_codes{$fruit_parameter}) { $iframe_document = $fruit_codes{$fruit_parameter}; } else { $iframe_document = 'sorry-no-such-fruit.html'; } $c->header('application/xhtml+xml'); print <<"END_OF_HTML"; <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Fruits</title> </head> <body> <form action="fruits.cgi"> <fieldset> <label for="fruit">Name of the fruit:</label> <input id="fruit" name="fruit_name" type="text" /> <input type="submit" /> </fieldset> </form> <iframe src="$iframe_document"> <a href="$iframe_document">resulting fruit</a> </iframe> </body> </html> END_OF_HTML 1;

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  • Converting stream of jpg files to FLV stream

    - by Mark
    I work with a Panasonic hcm280a camera that can be controlled by my software, It generates a stream of jpeg files that are huge and I want to convert this stream to a FLV stream preferably with a good compressional ration Does FFMpeg do that? I am basically looking for an off the shelve open source software (or commercial software) that can generate that streaming media for me. Again my input is a stream of jpg files that come from the camera server. Any insight or comment would be greatly appreciated Thanks

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  • iPhone 3.5mm jack based application

    - by maverick
    I want to encode data via a DTMF encoder and send it back to the iPhone via the 3.5mm Jack. Is it possible to send data back into the 3.5mm jack. conventionally audio signals are sent out over the iPhone 3.5mm jack? Is there provision to deal with DTMF and 3.5mm jack based input applications in Iphone's External Accessory framework?

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  • [ASP.NET MVC] Ajax.BeginForm doesn't work asynchronously

    - by Tony
    Hi, I've read the article http://davidhayden.com/blog/dave/archive/2009/05/19/ASPNETMVCAjaxBeginForm.aspx and now I have small problem with that code: <%using (Ajax.BeginForm("ChangeData", new AjaxOptions { UpdateTargetId = "myLabel" })) { %> <input id="mbutton" type="submit" value="blabla" /> <%} %> <label id="myLabel"></label> then, in the MyBookController.cs is the code to be invoked asynchronous: public ActionResult ChangeData() { return Content("OK"); } but, it doesn't work asynchronously, the compiler doesn't go inside that method

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  • JQUERY, AJAX Request and then loop through the data.

    - by nobosh
    Does anyone see anything wrong with the following: $.ajax({ url: '/tags/ajax/post-tag/', data: { newtaginput : $('#tag-input').val(), customerid : $('#customerid').val()}, success: function(data) { // After posting alert(data); arr = data.tagsinserted.split(','); alert(arr); //Loop through $.each(arr, function(n, val){ alert(n + ' ' + val) }); } }, "json"); tagsinserted is what's being returned, here is the full response: {"returnmessage":"The Ajax operation was successful.","tagsinserted":"b7,b4,dog,cat","returncode":"0"} Thanks

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  • Should my WCF webservice return a 500 or 200 http code (soap fault / functional return message)

    - by Tim Mahy
    Hi all, after reading the SOAP specs, it states that a SOAP Fault should return a http 500 errorcode, so when a SoapException is thrown, WCF returns a 500 error code. Now, I'm looking for some best practices to when return a functional soap error message and when to return a SOAP Fault. What would you guys return when a functional error occurred while processing the message because of the input message contains some functional errors, a 500 SOAP Fault or a 200 Soap response containing some error message ?

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  • print a linear linked list into a table

    - by user1796970
    I am attempting to print some values i have stored into a LLL into a readable table. The data i have stored is the following : DEBBIE STARR F 3 W 1000.00 JOAN JACOBUS F 9 W 925.00 DAVID RENN M 3 H 4.75 ALBERT CAHANA M 3 H 18.75 DOUGLAS SHEER M 5 W 250.00 SHARI BUCHMAN F 9 W 325.00 SARA JONES F 1 H 7.50 RICKY MOFSEN M 6 H 12.50 JEAN BRENNAN F 6 H 5.40 JAMIE MICHAELS F 8 W 150.00 i have stored each firstname, lastname, gender, tenure, payrate, and salary into their own List. And would like to be able to print them out in the same format that they are viewed on the text file i read them in from. i have messed around with a few methods that allow me to traverse and print the Lists, but i end up with ugly output. . . here is my code for the storage of the text file and the format i would like to print out: public class Payroll { private LineWriter lw; private ObjectList output; ListNode input; private ObjectList firstname, lastname, gender, tenure, rate, salary; public Payroll(LineWriter lw) { this.lw = lw; this.firstname = new ObjectList(); this.lastname = new ObjectList(); this.gender = new ObjectList(); this.tenure = new ObjectList(); this.rate = new ObjectList(); this.salary = new ObjectList(); this.output = new ObjectList(); this.input = new ListNode(); } public void readfile() { File file = new File("payfile.txt"); try{ Scanner scanner = new Scanner(file); while(scanner.hasNextLine()) { String line = scanner.nextLine(); Scanner lineScanner = new Scanner(line); lineScanner.useDelimiter("\\s+"); while(lineScanner.hasNext()) { firstname.insert1(lineScanner.next()); lastname.insert1(lineScanner.next()); gender.insert1(lineScanner.next()); tenure.insert1(lineScanner.next()); rate.insert1(lineScanner.next()); salary.insert1(lineScanner.next()); } } }catch(FileNotFoundException e) {e.printStackTrace();} } public void printer(LineWriter lw) { String msg = " FirstName " + " LastName " + " Gender " + " Tenure " + " Pay Rate " + " Salary "; output.insert1(msg); System.out.println(output.getFirst()); System.out.println(" " + firstname.getFirst() + " " + lastname.getFirst() + "\t" + gender.getFirst() + "\t" + tenure.getFirst() + "\t" + rate.getFirst() + "\t" + salary.getFirst()); } }

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  • how to access generated groupname for asp radiobutton

    - by rap-uvic
    Hi, I need to access radiobutton groupname in my jquery. However, groupname that's rendered for an asp radiobutton is kind of different. Example: <asp:RadioButton runat="server" GroupName="payment" ID="creditcard" Checked="true" value="creditcard" /> will generate: <input type="radio" checked="checked" value="creditcard" name="ctl00$ContentPlaceHolder1$payment" id="ctl00_ContentPlaceHolder1_creditcard"> I can't work with <%=creditcard.GroupName% in jquery. Is there a way I can get the generated groupname or name for it?

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  • it means quick-select algorithm?

    - by matin1234
    Hi, I have a question from my homework. I think my teacher needs an algorithm like quick select for this question is this correct? The question: Following a program (Subroutine) as a "black box" is given (for example, inside it is not clear and we do not even inside it) with the worst case linear time, can find the middle of n elements. Using this black box, get a simple linear algorithm that takes input i and find the element which its rank is equal to i (among the n elements) Thanks.

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  • Display image in Django Form

    - by Mridang Agarwalla
    I need to display an image in a Django form. My Django form is quite simple - a single text input field. When I initialise my Django form in a view, I would like to pass the image path as a parameter, and the form when rendered in the template displays the image. Is is possible with Django forms or would i have to display the image separately? Thanks.

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  • Perl glob one liner

    - by user260826
    Im working in a perl one liner to invert the contents of my file contents or perform operations, I was able to generate the script and one liner, but this one liner only works by entering file by file. perl -i -ne '$a=reverse $_;print "$a\n"' <filename> I want to change my one liner to get input from a range of files but when i do: perl -i -ne '$a=reverse $_;print "$a\n"' | ls -al I just get screen output of ls -al Not sure how to proceed. Thanks

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  • MSBuild command-line error - Silverlight 4 SDK is not installed

    - by Ned
    My MSBuild command line is as follows: msbuild e:\code\myProject.csproj /p:Configuration=Debug /p:OutputPath=bin/Debug /p:Platform=x86 /p:PlatformTarget=x86 The project builds fine on my development machine in VS2010 but not with the command above. I am running Win 7 64 - Bit. I'm getting an error that says I don't have the Silverlight 4 SDK installed but I do. I"ve read some posts that you have to set the Platform=x86 but to no avail. Here is the error message in full: Microsoft (R) Build Engine Version 4.0.30319.1 [Microsoft .NET Framework, Version 4.0.30319.1] Copyright (C) Microsoft Corporation 2007. All rights reserved. Build started 6/8/2010 4:03:38 PM. Project "E:\code\dashboards\MyProject2010\MyProject2010.Web\MyProject2010 .web.csproj" on node 1 (default targets). GenerateTargetFrameworkMonikerAttribute: Skipping target "GenerateTargetFrameworkMonikerAttribute" because all output fi les are up-to-date with respect to the input files. CoreCompile: Skipping target "CoreCompile" because all output files are up-to-date with resp ect to the input files. CopyFilesToOutputDirectory: Copying file from "obj\Debug\MyProject.Web.dll" to "bin\Debug\MyProject.Web .dll". MyProject2010.web - E:\code\dashboards\MyProject2010\MyProject2010.Web \bin\Debug\MyProject.Web.dll Copying file from "obj\Debug\MyProject.Web.pdb" to "bin\Debug\MyProject.Web .pdb". Project "E:\code\dashboards\MyProject2010\MyProject2010.Web\MyProject2010 .web.csproj" (1) is building "E:\code\dashboards\MyProject2010\MyProject20 10.Client\MyProject2010.Client.csproj" (2) on node 1 (GetXapOutputFile target( s)). C:\Program Files (x86)\MSBuild\Microsoft\Silverlight\v4.0\Microsoft.Silverlight .Common.targets(104,9): error : The Silverlight 4 SDK is not installed. [E:\cod e\dashboards\MyProject2010\MyProject2010.Client\MyProject2010.Client.cspr oj] Done Building Project "E:\code\dashboards\MyProject2010\MyProject2010.Clie nt\MyProject2010.Client.csproj" (GetXapOutputFile target(s)) -- FAILED. Done Building Project "E:\code\dashboards\MyProject2010\MyProject2010.Web\ MyProject2010.web.csproj" (default targets) -- FAILED. Build FAILED. "E:\code\dashboards\MyProject2010\MyProject2010.Web\MyProject2010.web.csp roj" (default target) (1) - "E:\code\dashboards\MyProject2010\MyProject2010.Client\MyProject2010.Clie nt.csproj" (GetXapOutputFile target) (2) - (GetFrameworkPaths target) - C:\Program Files (x86)\MSBuild\Microsoft\Silverlight\v4.0\Microsoft.Silverlig ht.Common.targets(104,9): error : The Silverlight 4 SDK is not installed. [E:\c ode\dashboards\MyProject2010\MyProject2010.Client\MyProject2010.Client.cs proj] 0 Warning(s) 1 Error(s) Time Elapsed 00:00:00.39 I appreciate anyone's help. Thanks.

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