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  • Flow charts and algorithms

    - by Dave
    Hello there, I am from a networking background and completely new to algorithm and flow charts, so could you please assist me with the following? Draw flow charts for the following algorithmss: State whether a number entered at the keyboard is even or odd. Calculate the mean of a five numbers entered by the user from the keyboard Count the number of characters and the number of words that are in a text file Many thanks in advance!

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  • Best ways to write a method that updates two objects in a multithreaded java environment?

    - by DanielHonig
    Suppose we have a class called AccountService that manages the state of accounts. AccountService is defined as interface AccountService{ public void debit(account); public void credit(account); public void transfer(Account account, Account account1); } Given this definition, what is the best way to implement transfer() so that you can guarantee that transfer is an atomic operation. I'm interested in answers that reference Java 1.4 code as well as answers that might use resources from java.util.concurrent in Java 5

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  • How to get the Host value inside ~/.ssh/config

    - by iconoclast
    Within a ~/.ssh/config or ssh_config file, %h will give you the HostName value, but how do you get the Host ("alias") value? Why would I want to do that? Well, here's an example Host some_host_alias HostName 1.2.3.4 User my_user_name PasswordAuthentication no IdentityFile ~/.ssh/some_host_alias.rsa.id LocalCommand some_script.sh %h # <---- this is the critical line If I pass %h to the script, then it uses 1.2.3.4, which fails to give it all the options it needs to connect to that machine. I need to pass some_host_alias, but I can't find the % variable for that. (And: yes! I'm aware of the risk of recursion. That's solved inside the script.) UPDATE: Kenster pointed out that I could just hard-code the Host value as an argument to the script. Of course this will work in the example I gave, but it won't work if I'm using pattern matching for the Host.

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  • Why does this PowerShell script hang?

    - by jshin47
    Today I had to use Start-Sleep many times so I thought I would create a shortcut function for it, sleep($time). However, whenever I entered the function it never exits! It must be an issue with either the data type for the argument for Start-Sleep or the way I am declaring the function. Instead of posting the whole script, I've posted this useless one that would make a familiar beep pattern if it worked: function beep { Write-Host `a } function sleep { param([int]$time) Start-Sleep -m $time } beep sleep(300) beep sleep(200) beep sleep(50) beep sleep(300) beep sleep(450) beep sleep(200) beep

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  • A question related to back button

    - by user217572
    I'm doing code for state maintainance So what happens that ,my currnet view will be appear after pressing homme now in this view i want to add backbutton in normal condition i'm adding button like this, [self navigationItem].title = NSLocalizedString(@"login_title",@""); UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"back_button",@" ") style:UIBarButtonItemStylePlain target:self action:@selector(done)]; [self.navigationItem setHidesBackButton:YES animated:YES]; self.navigationItem.leftBarButtonItem = backItem; [backItem release];

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  • rewrite map (prg:) never finishes

    - by SooDesuNe
    using Apache and a prg type rewrite map. My map looks like: #!/usr/bin/perl $| = 1; # Turn off buffering while (<STDIN>) { print "someothersite.com"; } the rewrite rule declared in httpd.conf is: RewriteMap app_map prg:/file/path/test.pl RewriteRule (\/[\w]+)(\/[^\#\s]+)?$ http://${app_map:$1}$2 [P,L] And the log files show: init rewrite engine with requested uri /a/testlink.html applying pattern '(\/[\w]+)(\/[^\#\s]+)?$' to uri '/a/testlink.html' It appears like test.pl is never giving control back to apache, when the map is successfully found I expect to see this output in the log file: map lookup OK: map=app_map key=/a -> val=someothersite.com Why is my map not returning control back to apache?

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  • Export to word from php doesn't seem to work for me...

    - by chandru_cp
    I exported data from php page to word document but the problem is the header is not available in all pages.... Header is present in the first page but not in the next pages of the word document..... Here is my code, function changeDetails() { $bType = $this->input->post('textvalue'); if($bType == "word") { $this->load->library('table'); $data['countrytoword'] = $this->AddEditmodel1->export(); $this->table->set_heading('Name','Country','State','Town'); $out = $this->table->generate($data['countrytoword']); header("Content-Type: application/vnd.ms-word"); header("Expires: 0"); header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); header("Content-disposition: attachment; filename=$cur_date.doc"); echo '<br><br>'; echo '<strong>CountryList</strong><br><br>'; print_r($out); } } <? if(isset($countrytoword)) { ?> <table align="center" border="0"> <tr> <td> Name </td> <td> Country </td> <td> State </td> <td> Town </td> </tr> <? foreach($countrytoword as $dsasffd) { ?> <tr> <td><?= $dsasffd['dbName'] ?></td> <td><?= $dsasffd['dbCountry']; ?></td> <td><?= $dsasffd['dbState']; ?></td> <td><?= $dsasffd['dbTown']; ?></td> <? } } ?> </tr> </table>

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  • Programming Windows Cluster resource DLLs using Delphi

    - by kaeff
    I wonder whether there's a way to program a resource DLL for Windows Clusters in Delphi. I want to write a program that observes cluster state changes. Judging from the MSDN API reference, all relevant functions are located in the ClusAPI.h and ResAPI.h headers, but unfortunately it seems as if they haven't been ported yet and HeaderConv seems to fail on them. Does anyone has experience in doing such a thing?

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  • Graph Tour with Uniform Cost Search in Java

    - by user324817
    Hi. I'm new to this site, so hopefully you guys don't mind helping a nub. Anyway, I've been asked to write code to find the shortest cost of a graph tour on a particular graph, whose details are read in from file. The graph is shown below: http://img339.imageshack.us/img339/8907/graphr.jpg This is for an Artificial Intelligence class, so I'm expected to use a decent enough search method (brute force has been allowed, but not for full marks). I've been reading, and I think that what I'm looking for is an A* search with constant heuristic value, which I believe is a uniform cost search. I'm having trouble wrapping my head around how to apply this in Java. Basically, here's what I have: Vertex class - ArrayList<Edge> adjacencies; String name; int costToThis; Edge class - final Vertex target; public final int weight; Now at the moment, I'm struggling to work out how to apply the uniform cost notion to my desired goal path. Basically I have to start on a particular node, visit all other nodes, and end on that same node, with the lowest cost. As I understand it, I could use a PriorityQueue to store all of my travelled paths, but I can't wrap my head around how I show the goal state as the starting node with all other nodes visited. Here's what I have so far, which is pretty far off the mark: public static void visitNode(Vertex vertex) { ArrayList<Edge> firstEdges = vertex.getAdjacencies(); for(Edge e : firstEdges) { e.target.costToThis = e.weight + vertex.costToThis; queue.add(e.target); } Vertex next = queue.remove(); visitNode(next); } Initially this takes the starting node, then recursively visits the first node in the PriorityQueue (the path with the next lowest cost). My problem is basically, how do I stop my program from following a path specified in the queue if that path is at the goal state? The queue currently stores Vertex objects, but in my mind this isn't going to work as I can't store whether other vertices have been visited inside a Vertex object. Help is much appreciated! Josh

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  • Need to dealloc all views in navigation controller

    - by jmurphy
    Hello, I'm trying to set up an in app purchase and once the purchase has been made I need to reset the app to its initial launch state. I'm wondering if there is a way to dealloc all the view controllers inside of each navigation controller and reload the initial view that is displayed when the app launches. Thanks in advance!

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  • Why is Matlab Stateflow 7.7 not throwing errors on undefined variables?

    - by Pyrolistical
    Previously in Matlab Stateflow 7.1 all variables and functions had to be included before they can be referred to in the state diagram or else it would throw an error when you tried to parse the diagram. But now in 7.7 it doesn't catch those kinds of errors. Its still compiling the diagram because it catches other syntactic errors. Am I missing an option somewhere? Can this be turned on?

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  • How Do I Bind a UIButton Property to Another Property?

    - by cygnl7
    UIButton eventually inherits from NSObject, and NSObject implements NSKeyValueBindingCreation Protocol. So why can't I bind a UIButton's property to another class' property? [myUIButton bind:@"enabled" toObject:myOtherObject withKeyPath:@"otherObjectBOOLProperty" options:nil]; This results in the warning 'UIButton' may not respond to '-bind:toObject:withKeyPath:options:' What I'm trying to do is bind the enabled state of my UIButton to myOtherObject.otherObjectBOOLProperty.

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  • updating an activity from an asynchronous service

    - by Dave.B
    I've implemented a service that does an asynchronous sync to between my application and google docs. I want to update the top level activity of my application when the sync is complete. However because of the service it's possible that the app could be be in a unknown state. Is there a way to make the top level activity, whatever that may be, recreate itself from an asynchtask in a service.

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  • Android - How to prevent the phone screen from turning on when volume or camera key is pressed?

    - by 2Real
    I have an activity that shows up when the phone screen goes to sleep/turns off ie turns black. For some reason, the phone turns on when the volume buttons or the camera buttons are pressed. By turns on, I mean the screen wakes up or comes back from the black screen state. I've tried using dispatchKeyEvent(KeyEvent event) and the buttons are disabled on the activity, but they still wake up the phone.

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  • Misbehavior in regular expression in VIM

    - by poissonbreaker
    I am having a problem with a regular expression on vim. I have a pattern as follows: http:\/\/\(\w\+\.\?\)\+ [matches http://(AS MANY WORDS FOLLOWED BY DOT OR NOT ENCOUNTERS) e.g. http://wd1.wd2.com] I have a text as follows: http://wd1.wd2.com/wd3 I am trying to make this substitution on it: s/\(http:\/\/\)\(\w\+\.\?\)\+/\1wd4.wd5.com and the result is http://wd4.wd5.com /wd3 (Notice the white space inserted at the end of the replacement) How can I avoid having this inserted space? I am afraid is a bug in the regexp engine but I am not sure.

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