Search Results

Search found 24177 results on 968 pages for 'true'.

Page 418/968 | < Previous Page | 414 415 416 417 418 419 420 421 422 423 424 425  | Next Page >

  • Writing a mini-language with haskell, trouble with "while" statements and blocks { }

    - by Nibirue
    EDIT: problem partially solved, skip to the bottom for update. I'm writing a small language using haskell, and I've made a lot of progress, but I am having trouble implementing statements that use blocks, like "{ ... }". I've implemented support for If statements like so in my parser file: stmt = skip +++ ifstmt +++ assignment +++ whilestmt ifstmt = symbol "if" >> parens expr >>= \c -> stmt >>= \t -> symbol "else" >> stmt >>= \e -> return $ If c t e whilestmt = symbol "while" >> parens expr >>= \c -> symbol "\n" >> symbol "{" >> stmt >>= \t -> symbol "}" >> return $ While c t expr = composite +++ atomic And in the Syntax file: class PP a where pp :: Int -> a -> String instance PP Stmt where pp ind (If c t e) = indent ind ++ "if (" ++ show c ++ ") \n" ++ pp (ind + 2) t ++ indent ind ++ "else\n" ++ pp (ind + 2) e pp ind (While c t) = indent ind ++ "while (" ++ show c ++") \n" ++ "{" ++ pp (ind + 2) t ++ "}" ++ indent ind Something is wrong with the while statement, and I don't understand what. The logic seems correct, but when I run the code I get the following error: EDIT: Fixed the first problem based on the first reply, now it is not recognizing my while statment which I assume comes from this: exec :: Env -> Stmt -> Env exec env (If c t e) = exec env ( if eval env c == BoolLit True then t else e ) exec env (While c t) = exec env ( if eval env c == BoolLit True then t ) The file being read from looks like this: x = 1; c = 0; if (x < 2) c = c + 1; else ; -- SEPARATE FILES FOR EACH x = 1; c = 1; while (x < 10) { c = c * x; x = x + 1; } c I've tried to understand the error report but nothing I've tried solves the problem.

    Read the article

  • Using MonoDroid, how can I open a dialog when an EditText field gains focus?

    - by Kiada
    I made the EditText clickable but you have to "double-click" to bring the dialog box up, which isn't really desired behaviour. How can I bring the dialog box up when the EditText is clicked / gains focus? Bonus points for including a way to stop the keyboard popping up :) _createProfileDobEdtTxt.Clickable = true; _createProfileDobEdtTxt.Click += (sender, e) => { ShowDialog(DATE_OF_BIRTH_DIALOG); };

    Read the article

  • c# Lambda Expression built with LinqKit does not compile

    - by Frank Michael Kraft
    This lambda does not compile, but I do not understand why. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Linq.Expressions; using LinqKit; namespace ConsoleApplication2 { class Program { static void Main(string[] args) { var barModel = new BarModel(); string id = "some"; Console.WriteLine(barModel.subFor(id).ToString()); // output: m => (True AndAlso (m.key == value(ConsoleApplication2.Bar`1+<>c__DisplayClass0[ConsoleApplication2.Model]).id)) Console.ReadKey(); var subworkitems = barModel.list.Where(barModel.subFor(id).Compile()); // Exception {"variable 'm' of type 'ConsoleApplication2.Model' referenced from scope '', but it is not defined"} Console.WriteLine(subworkitems.ToString()); Console.ReadKey(); } } class Bar<TModel> { public Bar(Expression<Func<TModel, string>> foreignKeyExpression) { _foreignKeyExpression = foreignKeyExpression; } private Expression<Func<TModel, string>> _foreignKeyExpression { get; set; } public Expression<Func<TModel, bool>> subFor(string id) { var ex = forTargetId(id); return ex; } public Expression<Func<TModel, bool>> forTargetId(String id) { var fc = _foreignKeyExpression; Expression<Func<TModel, bool>> predicate = m => true; var result = predicate.And(m => fc.Invoke(m) == id).Expand(); return result; } } class Model { public string key; public string value; } class BarModel : Bar<Model> { public List<Model> list; public BarModel() : base(m => m.key) { list = new List<Model>(); } } }

    Read the article

  • Forms Auth requireSSl and Https

    - by zsharp
    If my login pages are https, does it matter if "requireSSl" is true in the forms tab of the web config? Currently I am redirecting pages with IIS to HTTPS. When I set requiressl it seems to cause problems. Can someone put the two settings in perspective. thanks

    Read the article

  • Why is the Objective-C Boolean data type defined as a signed char?

    - by EddieCatflap
    Something that has piqued my interest is Objective-C's BOOL type definition. Why is it defined as a signed char (which could cause unexpected behaviour if a value greater than 1 byte in length is assigned to it) rather than as an int, as C does (much less margin for error: a zero value is false, a non-zero value is true)? The only reason I can think of is the Objective-C designers micro-optimising storage because the char will use less memory than the int. Please can someone enlighten me?

    Read the article

  • Why does document.evaluate succeed in Firebug but fail in Selenium?

    - by anil
    browser.getEval function in selenium makes iterateNext return null ..Otherwise in firebug it returns a value(same script) document.evaluate("//button[text()='Save']", document, null, XPathResult.ANY_TYPE, null) .iterateNext() .disabled; returns true But browser.getEval("document.evaluate(\"//button[text()='Save']\", document, null, XPathResult.ANY_TYPE, null) .iterateNext() .disabled;"); returns that error as : "com.thoughtworks.selenium.SeleniumException: ERROR: Threw an exception: res.iterateNext() is null "

    Read the article

  • How to return this XML-RPC response in an array using PHP?

    - by mind.blank
    I'm trying to put together a WordPress plugin and I want to grab a list of all categories (of other WordPress blogs) via XML-RPC. I have the following code and it looks like it works so far: function get_categories($rpcurl,$username,$password){ $rpcurl2 = $rpcurl."/xmlrpc.php"; $params = array(0,$username,$password,true); $request = xmlrpc_encode_request('metaWeblog.getCategories',$params); $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $rpcurl2); curl_setopt($ch, CURLOPT_HEADER, false); curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: text/xml")); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_TIMEOUT, 10); curl_setopt($ch, CURLOPT_POSTFIELDS, $request); $results = curl_exec($ch); $res = xmlrpc_decode($results); curl_close($ch); return $res; } If I use $res I get the following string as the response: Array If I use $results then I get: categoryId17 parentId0 descriptionTest categoryDescription categoryNameTest htmlUrlhttp://test.yoursite.com/?cat=17 rssUrlhttp://test.yoursite.com/?feed=rss2&amp;cat=17 categoryId1 parentId0 descriptionUncategorized categoryDescription categoryNameUncategorized htmlUrlhttp://test.yoursite.com/?cat=1 rssUrlhttp://test.yoursite.com/?feed=rss2&amp;cat=1 I need to pull out the names after description so Uncategorized and Test in this case. It's my first time coding in PHP. I got these results by echoing them to the page, so not sure if they get changed in that process or not... By the way I modified the above code from one that posts to a WordPress blog remotely so maybe I haven't set some of the options correctly? With var_dump($res) I get: array(2) { [0]=> array(7) { ["categoryId"]=> string(2) "17" ["parentId"]=> string(1) "0" ["description"]=> string(4) "Test" ["categoryDescription"]=> string(0) "" ["categoryName"]=> string(4) "Test" ["htmlUrl"]=> string(40) "http://test.youreventwebsite.com/?cat=17" ["rssUrl"]=> string(54) "http://test.youreventwebsite.com/?feed=rss2&cat=17" } [1]=> array(7) { ["categoryId"]=> string(1) "1" ["parentId"]=> string(1) "0" ["description"]=> string(13) "Uncategorized" ["categoryDescription"]=> string(0) "" ["categoryName"]=> string(13) "Uncategorized" ["htmlUrl"]=> string(39) "http://test.youreventwebsite.com/?cat=1" ["rssUrl"]=> string(53) "http://test.youreventwebsite.com/?feed=rss2&cat=1" } }

    Read the article

  • how to use method in AsyncTask in android?

    - by J.R.P
    In my application use JASON webservice to get data from Google Navigarion api. I use the Code is below. i got Exception android.os.NetworkOnMainThreadException. how to use AsyncTask? here is my code. Thanks.`public class MainActivity extends MapActivity { MapView mapView ; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); System.out.println("*************1**************1"); setContentView(R.layout.activity_main); System.out.println("*************2**************"); mapView = (MapView) findViewById(R.id.mapv); System.out.println("*************3**************"); Route route = directions(new GeoPoint((int)(26.2*1E6),(int)(50.6*1E6)), new GeoPoint((int)(26.3*1E6),(int)(50.7*1E6))); RouteOverlay routeOverlay = new RouteOverlay(route, Color.BLUE); mapView.getOverlays().add(routeOverlay); mapView.invalidate(); System.out.println("*************4**************"); } @SuppressLint("ParserError") private Route directions(final GeoPoint start, final GeoPoint dest) { //https://developers.google.com/maps/documentation/directions/#JSON <- get api String jsonURL = "http://maps.googleapis.com/maps/api/directions/json?"; final StringBuffer sBuf = new StringBuffer(jsonURL); sBuf.append("origin="); sBuf.append(start.getLatitudeE6()/1E6); sBuf.append(','); sBuf.append(start.getLongitudeE6()/1E6); sBuf.append("&destination="); sBuf.append(dest.getLatitudeE6()/1E6); sBuf.append(','); sBuf.append(dest.getLongitudeE6()/1E6); sBuf.append("&sensor=true&mode=driving"); Parser parser = new GoogleParser(sBuf.toString()); Route r = parser.parse(); System.out.println("********r in thread*****" +r); return r; } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.activity_main, menu); return true; } @Override protected boolean isRouteDisplayed() { // TODO Auto-generated method stub return false; } } `

    Read the article

  • c# reflection: How can I invoke a method with an out parameter ?

    - by ldp615
    I want expose WebClient.DownloadDataInternal method like below: [ComVisible(true)] public class MyWebClient : WebClient { private MethodInfo _DownloadDataInternal; public MyWebClient() { _DownloadDataInternal = typeof(WebClient).GetMethod("DownloadDataInternal", BindingFlags.NonPublic | BindingFlags.Instance); } public byte[] DownloadDataInternal(Uri address, out WebRequest request) { _DownloadDataInternal.Invoke(this, new object[] { address, out request }); } } WebClient.DownloadDataInternal has a out parameter, I don't know how to invoke it. Help!

    Read the article

  • My login controller doesn't work. Problem with fetching username.

    - by misterwebz
    Currently my login controller doesn't work because i can't seem to fetch the username and password. I'm currently using something like this: form_username = str(request.params.get('username')) db_user = meta.Session.query(User).filter_by(username=form_username) if db_user is None: return redirect('auth/error') No matter which username is use, db_user always returns True and thus never goes to auth/error. I used the shell to play with this and i was able establish a connection with the database, so i'm not sure what i'm doing wrong here.

    Read the article

  • howto Debugging on PHP

    - by justjoe
    how we do basic debugging in PHP ? Can anybody share true horror story on debugging PHP application (or (even better) on PHP framework such Codeigniter and Wordpress) ? i love to hear real experience in case i have to encounter similar situation on my journey to learn PHP.

    Read the article

  • Set a default value to a property

    - by BrunoLM
    Is it possible to set a default value without the body of a property? Maybe through annotations? [SetTheDefaultValueTo(true)] public bool IsTrue { get; set; } [SetTheDefaultValueTo(false)] public bool IsFalse { get; set; } public void Something() { var isTrue = this.IsTrue; var isFalse = this.IsFalse; }

    Read the article

  • Javascript problem with a global external link confirmation alert

    - by OverDrive
    Below is the code from a plugin for Joomla. It works on it's own and it's purpose is to detect external links on the page and force them into new browser windows using _blank. I've tried for about an hour (I don't know javascript well) but I can't seem to figure out how to get an onclick function working. End result, I want to add to this script the ability of a confirmation dialog, shown in the 2nd code section. An external link, when clicked, will pop up the confirmation dialog, and if it says yes, they will be able to get to the external URL, opening in a new window. Otherwise, it cancels, and does nothing. When I create a link with onclick="return ExitNotice(this.href);" within it it works perfectly, but since my website has multiple people submitting input, I'd like the confirmation box global. this.blankwin = function(){ var hostname = window.location.hostname; hostname = hostname.replace("www.","").toLowerCase(); var a = document.getElementsByTagName("a"); this.check = function(obj){ var href = obj.href.toLowerCase(); return (href.indexOf("http://")!=-1 && href.indexOf(hostname)==-1) ? true : false; }; this.set = function(obj){ obj.target = "_blank"; obj.className = "blank"; }; for (var i=0;i<a.length;i++){ if(check(a[i])) set(a[i]); }; }; this.addEvent = function(obj,type,fn){ if(obj.attachEvent){ obj['e'+type+fn] = fn; obj[type+fn] = function(){obj['e'+type+fn](window.event );} obj.attachEvent('on'+type, obj[type+fn]); } else { obj.addEventListener(type,fn,false); }; }; addEvent(window,"load",blankwin); Second Part /* ---------- OnClick External Link Notice ---------- */ function ExitNotice(link,site,ltext) { if(confirm("-----------------------------------------------------------------------\n\n" + "You're leaving the HelpingTeens.org website. HelpingTeens.org\ndoes not " + "control this site and its privacy policies may differ\nfrom our own. " + "Thank you for using our site.\n\nYou will now access the following link:\n" + "\n" + link + "\n\nPress \'OK\' to proceed, or press \'Cancel\' to remain here." + "\n\n-----------------------------------------------------------------------")) { return true; } history.go(0); return false; } A) Can anyone help me fix this problem? or B) Is there a better solution?

    Read the article

  • jquery drag and drop animation

    - by Cameron
    I have some UI functionality for drag and drop, but when an element is dropped, the animation makes it flit about all over the place for a split second before it appears in the newly dropped location. Can anyone advise how to tackle this, so that the draggable element moves more cleanly into place on success? ... success : function() { $(ui.draggable) .parent().droppable("option", "disabled", false) .end() .appendTo(droppable) .droppable("option", "disabled", true); }, ...

    Read the article

  • Suppress "Done, but with errors on page" in IE

    - by calebthorne
    I have a website using lots of jQuery and JavaScript that produces a "Done, but with errors on page" message in the footer of IE. Everything on the site works perfectly, so I don't want to spend the time troubleshooting the exact error. All I would like to do is suppress the "Done, but with errors on page" message so that clients don't freak out. I tried the following at the top of the page with no success: window.onerror = function() {return true;}

    Read the article

  • DRY up Ruby ternary

    - by Reed G. Law
    I often have a situation where I want to do some conditional logic and then return a part of the condition. How can I do this without repeating the part of the condition in the true or false expression? For example: ClassName.method.blank? ? false : ClassName.method Is there any way to avoid repeating ClassName.method? Here is a real-world example: PROFESSIONAL_ROLES.key(self.professional_role).nil? ? 948460516 : PROFESSIONAL_ROLES.key(self.professional_role)

    Read the article

  • VB.NET FileSystemWatcher Multiple Change Events

    - by John
    Hi. I have the following code: Imports System.IO Public Class Blah Public Sub New() InitializeComponent() Dim watcher As New FileSystemWatcher("C:\") watcher.EnableRaisingEvents = True AddHandler watcher.Changed, AddressOf watcher_Changed End Sub Private Sub watcher_Changed(ByVal sender As Object, ByVal e As FileSystemEventArgs) MsgBox(e.FullPath) End Sub End Class When I run it and save changes to a file on my C drive, the code works great, except it executes the watcher_Changed() method four times. Any idea why? The changeType is "4" every time. Thanks.

    Read the article

  • AJAX Calendar extender select month and year

    - by nCdy
    Is it real and how can I think about it. To make so the user will select only the month and year, not date, because he need a period on full month, not some date. here is simple control ... <asp:TextBox ID="TextBox3" runat="server" /> <asp:CalendarExtender ID="TextBox3_CalendarExtender" runat="server" Enabled="True" TargetControlID="TextBox3" />

    Read the article

  • Jquery toggle input disabled attribute

    - by Tommy Arnold
    here is my code $("#product1 :checkbox").click(function(){ $(this) .closest('tr') // find the parent row .find(":input[type='text']") // find text elements in that row .attr('disabled',false).toggleClass('disabled') // enable them .end() // go back to the row .siblings() // get its siblings .find(":input[type='text']") // find text elements in those rows .attr('disabled',true).removeClass('disabled'); // disable them }); how do i toggle .attr('disabled',false); I cant seem to find it on google.

    Read the article

  • Vector iterators in for loops, return statements, warning, c++

    - by Crystal
    Had 3 questions regarding a hw assignment for C++. The goal was to create a simple palindrome method. Here is my template for that: #ifndef PALINDROME_H #define PALINDROME_H #include <vector> #include <iostream> #include <cmath> template <class T> static bool palindrome(const std::vector<T> &input) { std::vector<T>::const_iterator it = input.begin(); std::vector<T>::const_reverse_iterator rit = input.rbegin(); for (int i = 0; i < input.size()/2; i++, it++, rit++) { if (!(*it == *rit)) { return false; } } return true; } template <class T> static void showVector(const std::vector<T> &input) { for (std::vector<T>::const_iterator it = input.begin(); it != input.end(); it++) { std::cout << *it << " "; } } #endif Regarding the above code, can you have more than one iterator declared in the first part of the for loop? I tried defining both the "it" and "rit" in the palindrome() method, and I kept on getting an error about needing a "," before rit. But when I cut and paste outside the for loop, no errors from the compiler. (I'm using VS 2008). Second question, I pretty much just brain farted on this one. But is the way I have my return statements in the palindrome() method ok? In my head, I think it works like, once the *it and *rit do not equal each other, then the function returns false, and the method exits at this point. Otherwise if it goes all the way through the for loop, then it returns true at the end. I totally brain farted on how return statements work in if blocks and I tried looking up a good example in my book and I couldn't find one. Finally, I get this warnings: \palindrome.h(14) : warning C4018: '<' : signed/unsigned mismatch Now is that because I run my for loop until (i < input.size()/2) and the compiler is telling me that input can be negative? Thanks!

    Read the article

< Previous Page | 414 415 416 417 418 419 420 421 422 423 424 425  | Next Page >