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  • How to process large block data visualization with Flex?

    - by hydra1983
    I know that's a big topic. However, it's better to know some general ideas to handle such problems. I have an application which requires Flex to render statistics data calculated instantly on the client side from a downloaded data set. The problems are: the data set is large and needs more than 10 seconds to be downloaded. there are some filters to control the statistics calculation algorithms. If user changes the filters, it would take a long time to recalculate the result and freeze the UI.

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  • mem-leak freeing g_strdup

    - by Mike
    I'm trying to free g_strdup but I'm not sure what I'm doing wrong. Using valgrind --tool=memcheck --leak-check=yes ./a.out I keep getting: ==4506== 40 bytes in 10 blocks are definitely lost in loss record 2 of 9 ==4506== at 0x4024C1C: malloc (vg_replace_malloc.c:195) ==4506== by 0x40782E3: g_malloc (in /lib/libglib-2.0.so.0.2200.3) ==4506== by 0x4090CA8: g_strdup (in /lib/libglib-2.0.so.0.2200.3) ==4506== by 0x8048722: add_inv (dup.c:26) ==4506== by 0x80487E6: main (dup.c:47) ==4506== 504 bytes in 1 blocks are possibly lost in loss record 4 of 9 ==4506== at 0x4023E2E: memalign (vg_replace_malloc.c:532) ==4506== by 0x4023E8B: posix_memalign (vg_replace_malloc.c:660) ==4506== by 0x408D61D: ??? (in /lib/libglib-2.0.so.0.2200.3) ==4506== by 0x408E5AC: g_slice_alloc (in /lib/libglib-2.0.so.0.2200.3) ==4506== by 0x4061628: g_hash_table_new_full (in /lib/libglib-2.0.so.0.2200.3) ==4506== by 0x40616C7: g_hash_table_new (in /lib/libglib-2.0.so.0.2200.3) ==4506== by 0x8048795: main (dup.c:42) I've tried different ways to freed but no success so far. I'll appreciate any help. Thanks BTW: It compiles and runs fine. #include <stdio.h> #include <string.h> #include <stdlib.h> #include <glib.h> #include <stdint.h> struct s { char *data; }; static GHashTable *hashtable1; static GHashTable *hashtable2; static void add_inv(GHashTable *table, const char *key) { gpointer old_value, old_key; gint value; if(g_hash_table_lookup_extended(table,key, &old_key, &old_value)){ value = GPOINTER_TO_INT(old_value); value = value + 2; /*g_free (old_key);*/ } else { value = 5; } g_hash_table_replace(table, g_strdup(key), GINT_TO_POINTER(value)); } static void print_hash_kv (gpointer key, gpointer value, gpointer user_data){ gchar *k = (gchar *) key; gchar *h = (gchar *) value; printf("%s: %d \n",k, h); } int main(int argc, char *argv[]){ struct s t; t.data = "bar"; int i,j; hashtable1 = g_hash_table_new(g_str_hash, g_str_equal); hashtable2 = g_hash_table_new(g_str_hash, g_str_equal); for(i=0;i<10;i++){ add_inv(hashtable1, t.data); add_inv(hashtable2, t.data); } /*free(t.data);*/ /*free(t.data);*/ g_hash_table_foreach (hashtable1, print_hash_kv, NULL); g_hash_table_foreach (hashtable2, print_hash_kv, NULL); g_hash_table_destroy(hashtable1); g_hash_table_destroy(hashtable2); return 0; }

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  • How can I make one child window draw over another within the same form?

    - by Colen
    Let's say I have ten child windows within a form. How do I make sure one of those windows is drawn over all the others? For example, how do I make sure that window 6 always overdraws windows 1-5 and 7-10? I don't want the window to be drawn over everything else on the screen, just everything else within that form. I've already tried using HWND_TOPMOST and HWND_TOP (see http://stackoverflow.com/questions/2823700/how-can-i-make-a-child-window-topmost ) but it didn't work. :(

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  • How to hide certain elements on a page using jQuery

    - by Ankur
    I am trying to implement something that is similar to a faceted search. My data is a series of objects and relationships. The idea is that you click an object (in this case "95 Theses" and then the possibly relationships are displayed, in this case "author" and clicking the relationship shows the object that matches the relationship, in this case "Martin Luther". My clicking of objects and relationsips (predicates) works fine. What I need to do is allow users to click an object or relationship and have all those that extend from it removed. This is what I thought of adding when a object or relationship 'tag' is clicked (every time I add another object or relationship I increment the global attribute called 'level'): if($(".objHolder,. preHolder").filter("[level>'"+level+"']").filter("[holderId='"+holderId+"']").length) { $(".objHolder,. preHolder").filter("[level>'"+level+"']").filter("[holderId='"+holderId+"']").remove(); } <table border="0" cellpadding="4" cellspacing="2"> <tbody><tr> <td class="objHolder" objid="1" holderid="1" level="1"> <table border="0" cellpadding="4" cellspacing="2"> <tbody><tr class="objItemRow" objid="1" holderid="1" level="1"> <td class="objItem" objid="1" holderid="1" level="2" bgcolor="#eeeeee" nowrap="nowrap">95 Theses</td> </tr></tbody> </table></td> <td><img src="images/right.jpg" alt="" height="10" width="16"></td> <td class="preHolder" level="2" holderid="1"> <table border="0" cellpadding="4" cellspacing="2"><tbody> <tr><td class="preItem" level="3" subid="1" preid="1" holderid="1" bgcolor="#eeeeee" nowrap="nowrap">author</td></tr> </tbody></table></td> <td><img src="images/right.jpg" alt="" height="10" width="16"></td> <td class="objHolder" level="3" holderid="1"> <table border="0" cellpadding="4" cellspacing="2"><tbody><tr><td class="objItem" level="4" objid="3" holderid="1" bgcolor="#eeeeee" nowrap="nowrap">Martin Luther</td></tr></tbody></table> </td> </tr></tbody> </table>

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  • Firefox select text range

    - by Juriy
    Hello guys, A quick question: how do I programatically select the text fragment of the page in FireFox? For example, there's a paragraph of text, user clicks the button and symbols from 10-th to 15-th are selected as if user dragged a mouse in a regular way.

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  • Item index of Binding element

    - by vibeeshanRC
    I am creating a XAML / C# WinRT App and i have a collection of collection and i am binding it to a Grid-view(collections as groups ) Now i have to color the background of the GridViewItem according to their index in the collection (Dark color for the first one and light color for the last one ) How can i implement using a converter. (if there are 6 collections with 10 items all the first item will the dark and the 10 the item will be lighter). Simply: How can i send the item-index property to the converter as a parameter. My XAML <GridView x:Name="Grid1" ItemsSource="{Binding}" ItemTemplateSelector="{StaticResource templateSelector}" SelectionMode="None" > <GridView.ItemsPanel> <ItemsPanelTemplate> <VirtualizingStackPanel Orientation="Horizontal" VirtualizingStackPanel.VirtualizationMode="Recycling"/> </ItemsPanelTemplate> </GridView.ItemsPanel> <GridView.GroupStyle> <GroupStyle HidesIfEmpty="True"> <GroupStyle.HeaderTemplate> <DataTemplate> <Grid Margin="0,0,0,0"> <TextBlock Text='{Binding Name}' Margin="5" /> </Grid> </DataTemplate> </GroupStyle.HeaderTemplate> <GroupStyle.ContainerStyle> <Style TargetType="GroupItem" > <Setter Property="BorderThickness" Value="0"/> <Setter Property="Margin" Value="0,0"/> </Style> </GroupStyle.ContainerStyle> <GroupStyle.Panel> <ItemsPanelTemplate> <VariableSizedWrapGrid/> </ItemsPanelTemplate> </GroupStyle.Panel> </GroupStyle> </GridView.GroupStyle> </GridView> .......... <converters:MyConverter x:Key="templateSelector" Temp1="{StaticResource Temp1}" Temp2="{StaticResource Temp2}" > </converters:MyConverter> <DataTemplate x:Key="Temp1"> <Grid > <Grid> <Grid.Resources> <converters:PanelBackgroundColorConverter x:Name="panelBackgroundColorConverter" Key="{Binding}"/> <Grid.Resources/> <Grid.Background> <Binding Path="MPath" Converter="{StaticResource panelBackgroundColorConverter}" ConverterParameter="sym"/> </Grid.Background> <Grid/> <DataTemplate/>

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  • How do I get the Math equation of Python Algorithm?

    - by Gabriel
    ok so I am feeling a little stupid for not knowing this, but a coworker asked so I am asking here: I have written a python algorithm that solves his problem. given x 0 add all numbers together from 1 to x. def fac(x): if x > 0: return x + fac(x - 1) else: return 0 fac(10) 55 first what is this type of equation is this and what is the correct way to get this answer as it is clearly easier using some other method?

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  • problem with Double and Rational Number

    - by altair211
    Hi, I am writing a function in which I need to read a string contains floating point number and turn it back to Rational. But When I do toRational (read input :: Double), it will not turn for eg: 0.9 into 9 % 10 as expected, but instead 81..... % 9007... Thx

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  • Value isnt being saved in the strings

    - by Raptrex
    I'm trying to make a class where I put a key and value into the put method which puts the key in the k string array and value into the v string array, however it is not being saved in the array when I do get or display. For example: put(dan,30) get(dan) returns null display returns null null 10 times. Anyone know whats wrong? public class Memory { final int INITIAL_CAPACITY = 10; String[] k = new String[INITIAL_CAPACITY]; String[] v = new String[INITIAL_CAPACITY]; int count = 0; public Memory() { count = 0; } public int size() { return count; } public void put(String key, String value) { int a = 0; boolean found = false; for (int i = 0; i < k.length; i++) { //System.out.println("key is " + key.equals(k[i])); if (key.equalsIgnoreCase(k[i])) { v[i] = value; found = true; } if (found) break; a++; } //System.out.println(a == k.length); if (a == k.length); { k[count] = key; v[count] = value; //System.out.println(k[count] + " " + v[count]); count++; //System.out.println(count); } } public String get(String key) { String output = "a"; for(int i = 0; i < k.length; i++) { if(!key.equalsIgnoreCase(k[i])) { output = null; } else { output = v[i]; return output; } } return output; } public void clear() { for (int i = 0; i < k.length; i++) { k[i] = null; v[i] = null; } count = 0; } public void display() { for (int i = 0; i < k.length; i++) { System.out.println(k[i] + " " + v[i]); } } }

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  • assistance required, hangman game.

    - by Phillip Gibson
    I am making a hangman game and am having trouble with part of it. I have selected a random word from a file, but I want to display the word as a series of undersocres __ and then match the letter chosen to a position in the undersocres. Can anyone help me? cout <<"1. Select to play the game\n"; cout <<"2. Ask for help\n"; cout <<"3. Select to quit the game\n"; cout << "Enter a selection: "; int number; cin >> number; while(number < 1 || number > 3 || cin.fail()) { if(cin.fail()) { cin.sync(); cin.clear(); cout << "You have not entered a number, please enter a menu selection between 1 and 3\n"; cin >> number; } else { cout << "Your selection must be between 1 and 3!\n"; cin >> number; } } switch (number) { case 1: { string word; string name; cout << " Whats your name? "; cin >> name; Player player(); ifstream FileReader; FileReader.open("words.txt"); if(!FileReader.is_open()) cout << "Error"; //this is for the random selection of words srand(time(0)); int randnum = rand()%10+1; for(int counter = 0; counter < randnum; counter++) { getline(FileReader, word, '\n'); } cout << "my word: " << word << "\n"; // get length of word int length; //create for loop for(int i = 0; i < length; i++) cout << "_"; //_ _ _ _ _ SetCursorPos(2,10); FileReader.close(); break;

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  • Is it possible to parse a URL into it's composite components?

    - by Paul Alexander
    I'd like to parse an incoming URL into it's component parts for some pre-processing before passing it into the standard MVC routing logic. For example given your standard route {controller}/{action}/{id} and the URL /user/show/10 Is there a way to have the Routing system return a dictionary containing controller, action and id keys with their corresponding values?

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  • Using jQuery or javascript to render json into multi-column table

    - by Scott Yu - UX designer
    I am trying to render a JSON into a HTML table. But the difficulty is making it so it loops through JSON and renders multiple columns if necessary. For the example below, what I want is this: Result wanted Result Wanted <table> <tr><th>AppName</th><td>App 1</td><td>App 2</td></tr> <tr><th>Last Modified</th><td>10/1/2012</td><td></td></tr> <tr><th>App Logo</th><td>10/1/2012</td><td></td></tr> blahblah </table> <table> <tr><th>AppName</th><td>App 1</td></tr> blahblah </table> JSON Example "Records": [ { "AppName": "App 1", "LastModified": "10/1/2012, 9:30AM", "ShipTo_Name": "Dan North", "ShipTo_Address": "Dan North", "ShipTo_Terms": "Dan North", "ShipTo_DueDate": "Dan North", "Items 1": [ { "Item_Name": "Repairs", "Item_Description": "Repair Work" } ] }, { "AppName": "App 2", "AppLogo": "http://www.google.com/logo.png", "LastModified": "10/1/2012, 9:30AM", "BillTo_Name": "Steve North", "Items 1": [ { "Item_Name": "Repairs", "Item_Description": "Repair Work" } ] } ], "Records": [ { "AppName": "App 1", "LastModified": "10/1/2012, 9:30AM", "ShipTo_Name": "222", "ShipTo_Address": "333 ", "ShipTo_Terms": "444", "ShipTo_DueDate": "5555", "Items 1": [ { "Item_Name": "Repairs", "Item_Description": "Repair Work" } ] } ], Code I am using now function CreateComparisonTable (arr,level,k) { var dumped_text = ""; if(!level) level = 0; //The padding given at the beginning of the line. var level_padding = ""; for(var j=0;j<level+1;j++) level_padding = "--"; if(typeof(arr) == 'object') { //Array/Hashes/Objects for (var item in arr) { var value = arr[item]; if (typeof(value) == 'object') { //If it is an array, if(item !=0) { dumped_text += '<tr><td>' + item + '<br>'; dumped_text += CreateComparisonTable(value,level+1); dumped_text += '</td></tr>'; } else { dumped_text += CreateComparisonTable(value,level, value.length); } } else { dumped_text += '<tr><td>' + level_padding + item + '</td><td>' + value + '</td></tr>'; } } } return dumped_text; } Jsfiddle here

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  • jQuery check on wordchange rather than "change" trigger

    - by benhowdle89
    I have a input that the user types a search parameter into, at the moment i have it on keyup to do a POST ajax request to a PHP script that returns search results. however its firing off 50 billion (not literally) post requests in about 10 seconds (as the user types) which slows the whole experience down. Can i use jQuery to detect a "wordup" rather than "keyup" by detecting the use of the space bar? Does this make sense?

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  • C# multiple asynchronous HttpRequest with one callback

    - by aepheus
    I want to make 10 asynchronous http requests at once and only process the results when all have completed and in a single callback function. I also do not want to block any threads using WaitAll (it is my understanding that WaitAll blocks until all are complete). I think I want to make a custom IAsyncResult which will handle multiple calls. Am I on the right track? Are there any good resources or examples out there that describe handling this?

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  • XML pass values to timer, AS3

    - by VideoDnd
    My timer has three variables that I can trace to the output window, but don't know how to pass them to the timer. How to I pass the XML values to my timer? Purpose I want to test with an XML document, before I try connecting it to an XML socket. myXML <?xml version="1.0" encoding="utf-8"?> <SESSION> <TIMER TITLE="speed">100</TIMER> <COUNT TITLE="starting position">-77777</COUNT> <FCOUNT TITLE="ramp">1000</FCOUNT> </SESSION> myFlash //myTimer 'instance of mytext on stage' /* fields I want to change with XML */ //CHANGE TO 100 var timer:Timer = new Timer(10); //CHANGE TO -77777 var count:int = 0; //CHANGE TO 1000 var fcount:int = 0; timer.addEventListener(TimerEvent.TIMER, incrementCounter); timer.start(); function incrementCounter(event:TimerEvent) { count++; fcount=int(count*count/1000);//starts out slow... then speeds up mytext.text = formatCount(fcount); } function formatCount(i:int):String { var fraction:int = i % 100; var whole:int = i / 100; return ("0000000" + whole).substr(-7, 7) + "." + (fraction < 10 ? "0" + fraction : fraction); } //LOAD XML var myXML:XML; var myLoader:URLLoader = new URLLoader(); myLoader.load(new URLRequest("time.xml")); myLoader.addEventListener(Event.COMPLETE, processXML); //PARSE XML function processXML(e:Event):void { myXML = new XML(e.target.data); trace(myXML.ROGUE.*); trace(myXML); //TEXT var text:TextField = new TextField(); text.text = myXML.TIMER.*; text.textColor = 0xFF0000; addChild(text); } RESOURCES OReilly's ActionScript 3.0 Cookbook, Chapter 12 Strings, Chapter 20 XML

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  • Which network protocol to use for lightweight notification of remote apps?

    - by Chris Thornton
    I have this situation.... Client-initiated SOAP 1.1 communication between one server and let's say, tens of thousands of clients. Clients are external, coming in through our firewall, authenticated by certificate, https, etc.. They can be anywhere, and usually have their own firewalls, NAT routers, etc... They're truely external, not just remote corporate offices. They could be in a corporate/campus network, DSL/Cable, even Dialup. Client uses Delphi (2005 + SOAP fixes from 2007), and the server is C#, but from an architecture/design standpoint, that shouldn't matter. Currently, clients push new data to the server and pull new data from the server on 15-minute polling loop. The server currently does not push data - the client hits the "messagecount" method, to see if there is new data to pull. If 0, it sleeps for another 15 min and checks again. We're trying to get that down to 7 seconds. If this were an internal app, with one or just a few dozen clients, we'd write a cilent "listener" soap service, and would push data to it. But since they're external, sit behind their own firewalls, and sometimes private networks behind NAT routers, this is not practical. So we're left with polling on a much quicker loop. 10K clients, each checking their messagecount every 10 seconds, is going to be 1000/sec messages that will mostly just waste bandwidth, server, firewall, and authenticator resources. So I'm trying to design something better than what would amount to a self-inflicted DoS attack. I don't think it's practical to have the server send soap messages to the client (push) as this would require too much configuration at the client end. But I think there are alternatives that I don't know about. Such as: 1) Is there a way for the client to make a request for GetMessageCount() via Soap 1.1, and get the response, and then perhaps, "stay on the line" for perhaps 5-10 minutes to get additional responses in case new data arrives? i.e the server says "0", then a minute later in response to some SQL trigger (the server is C# on Sql Server, btw), knows that this client is still "on the line" and sends the updated message count of "5"? 2) Is there some other protocol that we could use to "ping" the client, using information gathered from their last GetMessageCount() request? 3) I don't even know. I guess I'm looking for some magic protocol where the client can send a GetMessageCount() request, which would include info for "oh by the way, in case the answer changes in the next hour, ping me at this address...". Also, I'm assuming that any of these "keep the line open" schemes would seriously impact the server sizing, as it would need to keep many thousands of connections open, simultaneously. That would likely impact the firewalls too, I think. Is there anything out there like that? Or am I pretty much stuck with polling? TIA, Chris

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  • sql server 2008 takes alot of memory?

    - by Ahmed Said
    I making stress test on my database which is hosted on sqlserver 2008 64bit running on 64bit machine 10 GB of RAM. I have 400 threads each thread query the database for every second but the query time does not take time as the sql profiler says that, but after 18 hours sql takes 7.2 GB RAM and 7.2 on virtual memroy. Does is this normal behavior? and how can I adjust sql to clean up not in use memory?

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  • Should I skip authorization, with CanCan, of an action that instantiates a resource?

    - by irkenInvader
    I am writing a web app to pick random lists of cards from larger, complete sets of cards. I have a Card model and a CardSet model. Both models have a full RESTful set of 7 actions (:index, :new, :show, etc). The CardSetsController has an extra action for creating random sets: :random. # app/models/card_set.rb class CardSet < ActiveRecord::Base belongs_to :creator, :class_name => "User" has_many :memberships has_many :cards, :through => :memberships # app/models/card.rb class Card < ActiveRecord::Base belongs_to :creator, :class_name => "User" has_many :memberships has_many :card_sets, :through => :memberships I have added Devise for authentication and CanCan for authorizations. I have users with an 'editor' role. Editors are allowed to create new CardSets. Guest users (Users who have not logged in) can only use the :index and :show actions. These authorizations are working as designed. Editors can currently use both the :random and the :new actions without any problems. Guest users, as expected, cannot. # app/controllers/card_sets_controller.rb class CardSetsController < ApplicationController before_filter :authenticate_user!, :except => [:show, :index] load_and_authorize_resource I want to allow guest users to use the :random action, but not the :new action. In other words, they can see new random sets, but not save them. The "Save" button on the :random action's view is hidden (as designed) from the guest users. The problem is, the first thing the :random action does is build a new instance of the CardSet model to fill out the view. When cancan tries to load_and_authorize_resource a new CardSet, it throws a CanCan::AccessDenied exception. Therefore, the view never loads and the guest user is served a "You need to sign in or sign up before continuing" message. # app/controllers/card_sets_controllers.rb def random @card_set = CardSet.new( :name => "New Set of 10", :set_type => "Set of 10" ) I realize that I can tell load_and_authorize_resource to skip the :random action by passing :except => :random to the call, but that just feels "wrong" for some reason. What's the "right" way to do this? Should I create the new random set without instantiating a new CardSet? Should I go ahead and add the exception?

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