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  • Bash: easy way to put a configurable load on a system?

    - by WizardOfOdds
    In order to test how a program reacts when system resources become scarce (mainly the CPU but I'm interested in disk I/O too), I'd like to put an arbitrary load on the system. Currently I'm doing something like this: #!/bin/bash while true do echo "a" >> a.txt md5 a.txt done I could also start mp3-encoding audio files, or whatever. What would be an easy and small Bash script that could be used to simulate an arbitrary load, ideally configurable using parameter(s)?

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  • Accessing parent-level controls from inside a ComboBox's child controls

    - by eponymous23
    I have XAML similar to this: <ListBox ItemsSource="{Binding SearchCriteria, Source={StaticResource model}}" SelectionChanged="cboSearchCriterionType_SelectionChanged"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel Name="spCriterion" Orientation="Horizontal" Height="20"> <ComboBox Name="cboSearchCriterionType" Width="120" SelectionChanged="cboSearchCriterionType_SelectionChanged"> <ComboBox.Items> <ComboBoxItem IsSelected="True" Content="Anagram Match" /> <ComboBoxItem Content="Pattern Match" /> <ComboBoxItem Content="Subanagram Match" /> <ComboBoxItem Content="Length" /> <ComboBoxItem Content="Number of Vowels" /> <ComboBoxItem Content="Number of Anagrams" /> <ComboBoxItem Content="Number of Unique Letters" /> </ComboBox.Items> </ComboBox> <TextBox x:Name="SearchSpec" Text="{Binding SearchSpec}" /> <TextBox x:Name="MinValue" Text="{Binding MinValue}" Visibility="Collapsed" /> <TextBox x:Name="MaxValue" Text="{Binding MaxValue}" Visibility="Collapsed" /> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> As you can tell from the markup, I have a listbox that is bound to a collection of SearchCriterion objects (collectively contained in a SearchCriteria object). The idea is that the user can add/remove criterion items from the criteria, each criterion is represented by a listbox item. Inside the listbox item I have a combobox and three textboxes. What I'm trying to do is change the visibility of the TextBox controls depending on the item that is selected in the ComboBox. For example, if the user selects "Pattern Match" then I want to show only the first textbox and hide the latter two; conversely, if the user selects "Length" or any of the "Number of..." items, then I want to hide the first TextBox and show the latter two. What is the best way to achieve this? I was hoping to do something simple in the SelectionChanged event handler for the listbox but the textbox controls are presumably out of the SelectionChanged event's scope. Do I have to programmatically traverse the control hierarchy and find the controls?

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  • how to wait multiple function processing to finish

    - by user351412
    I have a problem about multiple function processing , listed as below code, the main function is btnEvalClick, I have try to use alter native 1and 2 to wait the function not move to next record before theprocessed function finish, but it does not work //private function btnEvalClick(event:Event):void { // var i:int; // for(i= 0; i < (dataArr1.length); i++) { // dispatchEvent( new FlexEvent('test') ); // callfunc1('cydatGMX'); //call function 1 // callfun2('cydatGMO'); //call function 1 // editSave(); //save record (HTTP) //## Alternative 1 //if (String(event) == 'SAVEOK') { // RecMov('next'); //move record if save = OK //} //## Alternative 2 //while (waitfc == '') // if waitfc not 'OK' continue looping //{ // z = z + 1; //} // RecMov('next'); //Move to next record to process //} //private function callfunc1(tasal:String):void { // var mySO :SharedObject; // var myDP: Array; // var i:int; // var prm:Array; // try // { // mySO = SharedObject.getLocal(tasal,'/'); // prm = mySO.data.txt.split('?'); // for(i=0; i < (prm.length - 1); i++) { // myDP = prm[i].toString().split('^'); // if ( myDP[0].toString() == String(dataArr1[dg].MatrixCDCol)){ // myDPX = myDP; // break; // } // } // } // catch (err:Error) { // Alert.show('Limit object creation fail (' + tasal + '), please retry ); // } //} //private function editSave():void //{ // var parameters:* = // { // 'CertID': CertIDCol.text, 'AssetID': AssetIDCol.text, 'CertDate': cdt, //'Ccatat': CcatatCol.text, 'CertBy': CertByCol.text, 'StatusID': StatusIDCol.text, //'UpdDate': lele, 'UpdUsr': ApplicationState.instance.luNm }; // doRequest('Update', parameters, saveItemHandler); //} //private function doRequest(method_name:String, parameters:Object, callback:Function):void // { // add the method to the parameters list // parameters['method'] = (method_name + 'ASC'); // gateway.request = parameters; // var call:AsyncToken = gateway.send(); // call.request_params = gateway.request; // call.handler = callback; // } //private function saveItemHandler(e:Object):void // { // if (e.isError) // { // Alert.show('Error: ' + e.data.error); // } // else // { // Alert.show('Record Saved..'); // waitfc = 'OK'; // dispatchEvent( new FlexEvent('SAVEOK') ); // } // }

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  • Design pattern for adding / removing elements

    - by de3
    Wikipedia's definition for Iterator pattern design: the Iterator pattern is a design pattern in which iterators are used to access the elements of an aggregate object sequentially without exposing its underlying implementation. Iterator interface in java provides the following methods hasNext() next() remove() Is there a pattern design, or a java interface for inserting / deleting elements, and getting length of the aggregate object, in addition to iterating them? I know remove() is an optional method that can be used once per call to next(), but I am implementing a circular FIFO array and need a method delete() independent of iterator's next().

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  • What are the performance characteristics of SignalR at scale?

    - by Joel Martinez
    I'm interested in the performance characteristics of SignalR at scale ... particularly, how it behaves at the fringes of capability. When a server is at capacity, what happens? Does it drop messages? Do some clients not get notified? Are messages queued until all are delivered? And if so, will the queue eventually overflow and crash the server? I ask because conducting such a test myself would be impractical, and I'm hoping someone could point me to documentation speaking to this ... or perhaps someone could comment that has seen how SignalR behaves at scale. Thanks! note: I'm familiar with this other stackoverflow question on the stability and scalability of SignalR. But I believe my question is asking a slightly different question in that I'm not concerned with the theoretical scaling limits, I want to know how it behaves when it reaches the limits ... so I know what to be on the lookout for.

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  • Regex to get value of URL parameter?

    - by stef
    In a url like the one below, I'd like to get the value of ProdId. The URL format will always be consistent, as will the parameter name, but the length of the value may change. It will always be numeric. http://www.site.com/page.php?ProdId=2683322&xpage=2 Using PHP what's the fastest way to get it (I'll be processing 10,000's so speed is an issue) ?

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  • FileStream to save file then immediately unlock in .NET ?

    - by aron
    I have this code that saves a pdf file. FileStream fs = new FileStream(SaveLocation, FileMode.Create); fs.Write(result.DocumentBytes, 0, result.DocumentBytes.Length); fs.Flush(); fs.Close(); It works fine. However sometimes it does not release the lock right away and that causes file locking exceptions with functions run after this one run. Is there a ideal way to release the file lock right after the fs.Close()

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  • Sending data to php function from ajax

    - by Faryal Khan
    I am using an ajax call which is as follows var ID=$(this).attr('id'); var input=$("#input_"+ID).val(); var dataString = {id: ID, value: input}; $("#span_"+ID).html(input); if(input.length>0) { $.ajax({ type: "POST", url: "/apps/worker_app.php", data: dataString, cache: false, success: function(html) { $("#span_"+ID).html(span); } }); } How can I get the data in my php function edit_ajax() which is inside worker_app I use post but the array come to be empty Thanks

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  • How can I improve the recursion capabilities of my ECMAScript implementation?

    - by ChaosPandion
    After some resent tests I have found my implementation cannot handle very much recursion. Although after I ran a few tests in Firefox I found that this may be more common than I originally thought. I believe the basic problem is that my implementation requires 3 calls to make a function call. The first call is made to a method named Call that makes sure the call is being made to a callable object and gets the value of any arguments that are references. The second call is made to a method named Call which is defined in the ICallable interface. This method creates the new execution context and builds the lambda expression if it has not been created. The final call is made to the lambda that the function object encapsulates. Clearly making a function call is quite heavy but I am sure that with a little bit of tweaking I can make recursion a viable tool when using this implementation. public static object Call(ExecutionContext context, object value, object[] args) { var func = Reference.GetValue(value) as ICallable; if (func == null) { throw new TypeException(); } if (args != null && args.Length > 0) { for (int i = 0; i < args.Length; i++) { args[i] = Reference.GetValue(args[i]); } } var reference = value as Reference; if (reference != null) { if (reference.IsProperty) { return func.Call(reference.Value, args); } else { return func.Call(((EnviromentRecord)reference.Value).ImplicitThisValue(), args); } } return func.Call(Undefined.Value, args); } public object Call(object thisObject, object[] arguments) { var lexicalEnviroment = Scope.NewDeclarativeEnviroment(); var variableEnviroment = Scope.NewDeclarativeEnviroment(); var thisBinding = thisObject ?? Engine.GlobalEnviroment.GlobalObject; var newContext = new ExecutionContext(Engine, lexicalEnviroment, variableEnviroment, thisBinding); Engine.EnterContext(newContext); var result = Function.Value(newContext, arguments); Engine.LeaveContext(); return result; }

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  • How to read some bytes from BYTE*

    - by chekalin-v
    I have BYTE pointer. For example the length of this BYTE array is 10. How can I read 4 bytes from 3 position BYTE array? Now I doing it so BYTE *source = "1234567890\0"; BYTE* tmp = new BYTE[4+1](); for(int i=0; i<4; i++) { tmp[i] = source[i+3]; }

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  • Need help with Drupal bulk mail low open rate for legitimate mailing list

    - by Ron Williams
    I've moved from constant contact to Drupal Simplenews/Mimemail/SMTP. Previously the open rate was around 50% for constant contact, but now it's 4-5% for the same list via the mentioned setup. Mail is getting out from the server, but it's having an issue anyway. Here's the setup: -The e-mail list consists of approximately 80,000 addresses which is queued at 10,000 e-mails per cron run (which runs hourly). -The server is a Dual Core2Quad machine with 2GB of RAM. -When mail is being sent, the mail queue will usually go up to ~1000 at the beginning of the hour before reducing to ~250 by the time the next cron occurs. -Newsletter is themed to display custom style for newsletter on send -Newsletter is received by some, but appears to be bounced by many (based on low open rate_ -I've added SPF, domain keys, and a PTR record to the DNS -Server hostname (listed in ptr) is different from hosted domain -Very low spam number via Spamassassin -IP and domain are not blacklisted -Mail goes out via SMTP module on delivery. Any ideas?

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  • Print one word from a string in python

    - by Shai
    Hi, How can i print only certain words from a string in python ? lets say i want to print only the 3rd word (which is a number) and the 10th one while the text length may be different each time mystring = "You have 15 new messages and the size is 32000" thanks.

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  • What's pcap_pkthdr there for?

    - by httpinterpret
    Code snippet from here: void packet_handler(u_char *param, const struct pcap_pkthdr *header, const u_char *pkt_data) { .... /* retireve the position of the ip header */ ih = (ip_header *) (pkt_data + 14); //length of ethernet header .... What's const struct pcap_pkthdr *header for, when do we need it, how is it populated (since there is no such info in the packet itself as below)?

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  • I Get the error message while write data in file --Cannot access the disposable object .Object name

    - by kunal rai
    This was the code: public static void SaveFile(Stream stream, string fileName = "") { using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication()) { IsolatedStorageFileStream fs = file.CreateFile(fileName); var filesize = stream.Length; var getContent = new byte[(int)filesize]; stream.Read(getContent, 0, (int)filesize); fs.Write(getContent, 0, (int)filesize); fs.Close(); } }

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  • How to "check for overwide node(s)." in graphviz dot file

    - by Tomas Forsman
    I'm trying to generate a large graph using graphviz. I have a generated text file with nodes defined in the dot format. When I try to generate a PNG file from the file using dot -Tpng:cairo graph.txt graph.png I get the error message: Error: Edge length 136228 larger than maximum 65535 allowed. Check for overwide node(s). How do I actually "check for overwide node(s)" ?

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  • Image.createImage problem in J2ME

    - by Michael
    Hi All, I tried this on J2ME try { Image immutableThumb = Image.createImage( temp, 0, temp.length); } catch (Exception ex) { System.out.println(ex); } I hit this error: java.lang.IllegalArgumentException: How do I solve this?

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  • Netcat / Apache solution to send data to PHP

    - by ToughPal
    Hi, I have this device that sends XML data to a webserver in format as follows POST HTTP/1.1 Content-Type:text/xml Content-Length:369 Followed by XML The problem here is that apache simply sends 400 error for this and does not work. Is there anyway to create netcat to read xml and send to php? Any other solution welcome! Is it better to run php to listen to Port? in that case will multiple requests at the same time work?

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  • android phone's scroll ball, D-Pad not working

    - by user270811
    hi, i have a Cliq and a MyTouch phone. i am writing a game that requires a fire button. on the cliq, it's the center of the D-Pad, and on the MyTouch, the scroll ball. i am handling the onKeyDown events via a separate thread. it all works until i press the button too many times, meaning the key down event is no longer fired off. if i press the D-Pad down or scroll the ball down, then the fire button works again. i can only guess that maybe the message queue within the OS is full, therefore the fire button temporarily malfuntions. can someone help me? thanks.

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  • How to rewrite this jQuery code by using Mootools?

    - by Nikita Sumeiko
    I have a jQuery code, but need it working by using Mootools: if ( $("span.mailme").length ) { var at = / AT /; var dot = / DOT /g; $('span.mailme').each(function () { var addr = $(this).text().replace(at, '@').replace(dot, '.'); $(this).after('<a href="mailto:' + addr + '">' + addr + '</a>'); $(this).remove(); }); } Is there anyone, who know as good Mootools as jQuery?

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