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  • Harvesting Dynamic HTTP Content to produce Replicating HTTP Static Content

    - by Neil Pitman
    I have a slowly evolving dynamic website served from J2EE. The response time and load capacity of the server are inadequate for client needs. Moreover, ad hoc requests can unexpectedly affect other services running on the same application server/database. I know the reasons and can't address them in the short term. I understand HTTP caching hints (expiry, etags....) and for the purpose of this question, please assume that I have maxed out the opportunities to reduce load. I am thinking of doing a brute force traversal of all URLs in the system to prime a cache and then copying the cache contents to geodispersed cache servers near the clients. I'm thinking of Squid or Apache HTTPD mod_disk_cache. I want to prime one copy and (manually) replicate the cache contents. I don't need a federation or intelligence amongst the slaves. When the data changes, invalidating the cache, I will refresh my master cache and update the slave versions, probably once a night. Has anyone done this? Is it a good idea? Are there other technologies that I should investigate? I can program this, but I would prefer a configuration of open source technologies solution Thanks

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  • Is it safe to call a function to intialize a class in a ctor list?

    - by Michael Dorgan
    I have Angle class that I want initialized to a random value. The Angle constructor can accept an int from a random() function. Is it safe to place this call in the ctor list: foo::foo() : Angle(random(0xFFFF)) {...} or do I have to do it in the body of the constructor? foo::foo() { Angle = Angle(random(0xFFFF)); ...} If it matters, the foo class is derived from another class and does have virtual methods. In addition, no exception handling is allowed in our app.

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  • How to make an AJAX call immediately on document loading

    - by Ankur
    I want to execute an ajax call as soon as a document is loaded. What I am doing is loading a string that contains data that I will use for an autocomplete feature. This is what I have done, but it is not calling the servlet. I have removed the calls to the various JS scripts to make it clearer. I have done several similar AJAX calls in my code but usually triggered by a click event, I am not sure what the syntax for doing it as soon as the document loads, but I thought this would be it (but it's not): <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <script type="text/javascript"> $(document).ready(function(){ $.ajax({ type: "GET", url: "AutoComplete", dataType: 'json', data: queryString, success: function(data) { var dataArray = data; alert(dataArray); } }); $("#example").autocomplete(dataArray); }); </script> <title></title> </head> <body> API Reference: <form><input id="example"> (try "C" or "E")</form> </body> </html>

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  • Can't seem to get .Union to work (merging 2 array's together, exclude duplicates)

    - by D. Veloper
    I want to combine two array's, excluding duplicates. I am using a custom class: public class ArcContact : IEquatable<ArcContact> { public String Text; public Boolean Equals(ArcContact other) { if (Object.ReferenceEquals(other, null)) return false; if (Object.ReferenceEquals(this, other)) return true; return Text.Equals(other.Text); } public override Int32 GetHashCode() { return Text == null ? 0 : Text.GetHashCode(); } } I implemented and the needed IEquatable interface as mentioned in this msdn section. I only want to check the Text property of the ArcContact class and make sure an Array of ArcContact have an unique Text. Here I pasted the code that I use, as you can see I have method with two parameters, array's to combine and below that the code I got from the previous mentioned msdn section. internal static class ArcBizz { internal static ArcContact[] MergeDuplicateContacts(ArcContact[] contacts1, ArcContact[] contacts2) { return (ArcContact[])contacts1.Union(contacts2); } internal static IEnumerable<T> Union<T>(this IEnumerable<T> a, IEnumerable<T> b); } What am I doing wrong?

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  • Javascript: Make a static code, dynamic - List of inputs

    - by BoDiE2003
    I have this code, that checks some ids and enable others, the javascript is pretty clear about what it does, but since it corresponds to some specific id ranges, I cant do just a look until it finishes, but I'm looking a way to do this dynamic and save 40 lines of code (or more), since its not the best way. function loopGroup1() { var a = 0; do { $$('.selectedAuthorities-3_' + a).each(function(chk1) { // watch for clicks chk1.observe('click', function(evt) { dynamicCheckbox1(); }); dynamicCheckbox1(); }); a++; } while (a < 4); } function dynamicCheckbox1() { // count how many of group_first are checked, // doEnable true if any are checked var doEnable = ($$('.selectedAuthorities-3_0:checked').length > 0) ? true : false; var doEnable1 = ($$('.selectedAuthorities-3_1:checked').length > 0) ? true : false; var doEnable2 = ($$('.selectedAuthorities-3_2:checked').length > 0) ? true : false; // for each in group_second, enable the checkbox, and // remove the cssDisabled class from the parent label var i = 0; do { $$('.selectedAuthorities-4_' + i).each(function(item) { if (doEnable || doEnable1 || doEnable2) { item.enable().up('li').removeClassName('cssDisabled'); } else { item.disable().up('li').addClassName('cssDisabled'); } }); i++; } while (i < 4); }; /* * * Loop Group 2 * * */ function loopGroup2() { var a = 0; do { $$('.selectedAuthorities-5_' + a).each(function(chk1) { // watch for clicks chk1.observe('click', function(evt) { dynamicCheckbox2(); }); dynamicCheckbox2(); }); a++; } while (a < 4); } function dynamicCheckbox2() { // count how many of group_first are checked, // doEnable true if any are checked var doEnable3 = ($$('.selectedAuthorities-5_0:checked').length > 0) ? true : false; // for each in group_second, enable the checkbox, and // remove the cssDisabled class from the parent label var i = 0; do { $$('.selectedAuthorities-6_' + i).each(function(item) { if (doEnable3) { item.enable().up('li').removeClassName('cssDisabled'); } else { item.disable().up('li').addClassName('cssDisabled'); } }); i++; } while (i < 4); }; /* * * Loop Group 3 * * */ function loopGroup3() { var a = 0; do { $$('.selectedAuthorities-6_' + a).each(function(chk1) { // watch for clicks chk1.observe('click', function(evt) { dynamicCheckbox3(); }); dynamicCheckbox3(); }); a++; } while (a < 4); } function dynamicCheckbox3() { // count how many of group_first are checked, // doEnable true if any are checked var doEnable4 = ($$('.selectedAuthorities-6_0:checked').length > 0) ? true : false; var doEnable5 = ($$('.selectedAuthorities-6_1:checked').length > 0) ? true : false; // for each in group_second, enable the checkbox, and // remove the cssDisabled class from the parent label var i = 0; do { $$('.selectedAuthorities-7_' + i).each(function(item) { if (doEnable4 || doEnable5) { item.enable().up('li').removeClassName('cssDisabled'); } else { item.disable().up('li').addClassName('cssDisabled'); } }); i++; } while (i < 4); }; /* * * Loop Group 4 * * */ function loopGroup4() { var a = 0; do { $$('.selectedAuthorities-9_' + a).each(function(chk1) { // watch for clicks chk1.observe('click', function(evt) { dynamicCheckbox4(); }); dynamicCheckbox4(); }); a++; } while (a < 4); } function dynamicCheckbox4() { // count how many of group_first are checked, // doEnable true if any are checked var doEnable6 = ($$('.selectedAuthorities-9_0:checked').length > 0) ? true : false; var doEnable7 = ($$('.selectedAuthorities-9_1:checked').length > 0) ? true : false; // for each in group_second, enable the checkbox, and // remove the cssDisabled class from the parent label var i = 0; do { $$('.selectedAuthorities-10_' + i).each(function(item) { if (doEnable6 || doEnable7) { item.enable().up('li').removeClassName('cssDisabled'); } else { item.disable().up('li').addClassName('cssDisabled'); } }); i++; } while (i < 4); };

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  • ssrs: one static row matrix, multiple columns will not filter out nulls

    - by pbarton99
    Using a ssrs 2005 matrix client side. I want to list the multiple addresses of one person, hence one row, multiple columns. The Column field is =Fields!StreetName.Value. The data details field is =First(Fields!StreetPrefix.Value) & " " & First(Fields!StreetName.Value). The datasource has a row for each address; however, some rows will have nulls since the datasource is composed of outer joins. The column grouping works, but the first column is always empty, (first 2 rows of datasource are null) addresses appear only after the empty column. I want to filter out nulls on the matrix, but its like the filter is ignored. I have also tried having the dataset return an empty string for a null streetname and setting the filter to =Fields!StreetName.Value != ="" but no difference. What am I missing?

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  • Make JQuery UI Dialog automatically grow HEIGHT to fit its contents (width remains static)

    - by Zack Macomber
    Having looked into How can I make a JQuery UI Dialog automatically grow or shrink to fit its contents?, I am using the height: "auto" option when building a jQuery modal dialog box: $( "#dialog-message" ).dialog({ autoOpen: false, width: "400", height: "auto", show: "slide", modal: true, buttons: { Ok: function() { $( this ).dialog( "close" ); } } }); However, the height isn't "growing" to fit all of the contents. I'm still seeing a vertical scrollbar as in this image: Is there a way right in the definition code I listed to ensure that the height grows enough so that a vertical scrollbar doesn't show? Or, do I need to do this programmatically before opening the dialog box? Edit 1 Not sure why, but Chrome is displaying this fine but IE 8 isn't. I need it to specifically work in IE 8 so I believe I'm just going to put a bottom margin on the text.

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  • coffee scrip layzy function implementation

    - by bbz
    I would like to something like this in JavaScript var init = function () { // do some stuff once var once = true // overwrite the function init = function () { console.log(once) } } CoffeeScript adds another local var init to the initial init so the second init doesn't overwrite the first one var init = function () { var init //automatically declared by coffeescript // do some stuff once var once = true // overwrite the function init = function () { console.log(once) } } Some tips for solutions / workarounds would be greatly appreciated.

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  • What is the difference between declaring data attributes inside or outside __init__

    - by user1898540
    I'm trying to get my head around OOP in Python and I'm a bit confused when it comes to declare variables within a class. Should I declare them inside of the __init__ procedure or outside it? What's the difference? The following code works just fine: # Declaring variables within __init__ class MyClass: def __init__(self): country = "" city = "" def information(self): print "Hi! I'm from %s, (%s)"%(self.city,self.country) me = MyClass() me.country = "Spain" me.city = "Barcelona" me.information() But declaring the variables outside of the __init procedure also works: # Declaring variables outside of __init__ class MyClass: country = "" city = "" def information(self): print "Hi! I'm from %s, (%s)"%(self.city,self.country) me = MyClass() me.country = "Spain" me.city = "Barcelona" me.information()

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  • Initializing Disqus comments in hidden element causes issue in FF 14.0.1

    - by Bazze
    This issue appears only in Firefox 14.0.1 (well I couldn't reproduce it in any other browser). If you put the code for Disqus comments inside an element that is hidden and wait until everything is fully loaded and then display the element using JavaScript, the comment box nor comments will show up. However if you resize the window, it'll show up immediately. It's working fine in latest version of Google Chrome and Safari though. What's causing this and how to fix it? Sample code to reproduce: <div id="test" style="display:none;"> <div id="disqus_thread"></div> <script type="text/javascript"> /* * * CONFIGURATION VARIABLES: EDIT BEFORE PASTING INTO YOUR WEBPAGE * * */ var disqus_shortname = 'onlinefunctions'; // required: replace example with your forum shortname /* * * DON'T EDIT BELOW THIS LINE * * */ (function() { var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true; dsq.src = 'http://' + disqus_shortname + '.disqus.com/embed.js'; (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq); })(); </script> <noscript>Please enable JavaScript to view the <a href="http://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript> <a href="http://disqus.com" class="dsq-brlink">comments powered by <span class="logo-disqus">Disqus</span></a> </div> <a href="#" onclick="document.getElementById('test').style.display = 'block'">show</a> I could post a link to a live example but I'm not sure about the policy of posting links here on Stack Overflow.

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  • Static footer, with attached and scaling overlap

    - by DavidYell
    I have been asked by a client to create a site where the content area overlaps the footer. However they also want the footer to be attached to the bottom of the viewport, which I've done, but it seems that I can't find a good way to vertically stretch the content to maintain the overlap should the browser be resized. I've created a diagram to help explain, http://www.squaresphere.co.uk/images/footer-diagram.png So ideally I need a way of calculating the height of the content and stretching the content div if content_length viewport.height, but keep a min-height if content_length < viewport.height A solution using html+css would be fantastic, but I'm starting to think that I'm going to have to do some funky jQuery onviewportresize or something Any suggestions would be awesome, thanks!

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  • C++ Initialize array in constructor EXC_BAD_ACCESS

    - by user890395
    I'm creating a simple constructor and initializing an array: // Construtor Cinema::Cinema(){ // Initalize reservations for(int i = 0; i < 18; i++){ for(int j = 0; j < 12; j++){ setReservation(i, j, 0); } } // Set default name setMovieName("N/A"); // Set default price setPrice(8); } The setReservation function: void Cinema::setReservation(int row, int column, int reservation){ this->reservations[row][column] = reservation; } The setMovieName function: void Cinema::setMovieName(std::string movieName){ this->movieName = movieName; } For some odd reason when I run the program, the setMovieName function gives the following error: "Program Received Signal: EXC_BAD_ACCESS" If I take out the for-loop that initializes the array of reservations, the problem goes away and the movie name is set without any problems. Any idea what I'm doing wrong? This is the Cinema.h file: #ifndef Cinema_h #define Cinema_h class Cinema{ private: int reservations[17][11]; std::string movieName; float price; public: // Construtor Cinema(); // getters/setters int getReservation(int row, int column); int getNumReservations(); std::string getMovieName(); float getPrice(); void setReservation(int row, int column, int reservation); void setMovieName(std::string movieName); void setPrice(float price); }; #endif

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  • Freestanding ARM C++ Code - empty .ctors section

    - by Matthew Iselin
    I'm writing C++ code to run in a freestanding environment (basically an ARM board). It's been going well except I've run into a stumbling block - global static constructors. To my understanding the .ctors section contains a list of addresses to each static constructor, and my code simply needs to iterate this list and make calls to each function as it goes. However, I've found that this section in my binary is in fact completely empty! Google pointed towards using ".init_array" instead of ".ctors" (an EABI thing), but that has not changed anything. Any ideas as to why my static constructors don't exist? Relevant linker script and objdump output follows: .ctors : { . = ALIGN(4096); start_ctors = .; *(.init_array); *(.ctors); end_ctors = .; } .dtors : { . = ALIGN(4096); start_dtors = .; *(.fini_array); *(.dtors); end_dtors = .; } -- 2 .ctors 00001000 8014c000 8014c000 00054000 2**2 CONTENTS, ALLOC, LOAD, DATA <snip> 8014d000 g O .ctors 00000004 start_ctors <snip> 8014d000 g O .ctors 00000004 end_ctors I'm using an arm-elf targeted GCC compiler (4.4.1).

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  • Django - Static content display based on URL

    - by Steven Potter
    I'm working on a Django site with a basic three column design. Left column navigation, center column content and right column URL specific content blocks. My question is about the best method of controlling the URL specific content blocks in the right column. I am thinking of something along the lines of the Flatpages app that will make the content available to the template context if the URL matches a pre-determined pattern (perhaps regex?). Does anyone know if such an app already exists? If not, I am looking for some advice about the best way to implement it. Particularly in relation to the matching of patterns to the current URL. Is there any good way to re-use parts of the Django URL dispatcher for this use?

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  • Python list should be empty on class instance initialisation, but it's not. Why?

    - by canavanin
    Hi everyone! I would like to create instances of a class containing a list that's empty by default; instead of later setting this list to the final full list I would like to successively add items to it. Here's a piece of sample code illustrating this: #!/usr/bin/python class test: def __init__(self, lst=[], intg=0): self.lista = lst self.integer = intg name_dict = {} counter = 0 for name in ('Anne', 'Leo', 'Suzy'): counter += 1 name_dict[name] = test() name_dict[name].integer += 1 name_dict[name].lista.append(counter) print name, name_dict[name].integer, name_dict[name].lista When I ran the above program I expected to get Anne 1 [1] Leo 1 [2] Suzy 1 [3] as I assumed lista to always be initialised to an empty list. What I got instead was this: Anne 1 [1] Leo 1 [1, 2] Suzy 1 [1, 2, 3] If I replace self.lista = lst by self.lista = [] it works fine, just like when I add the line name_dict[name].lista = [] to the for loop. Why is it that the contents of the previous objects' lists are retained, yet their values of integer aren't? I am rather new to Python, so it would be great if someone could point out to me where my thoughts/assumptions have gone astray. Thanks a lot in advance for your replies.

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  • [JavaScript] How can I load static configuration information

    - by Goro
    In my code, I use JavaScript for UI and PHP for back end. I also use PHP to store application settings and sometimes my UI code needs to access this information. My configuration file looks something like this (config.php): $resolution_x = 1920; $resolution_y = 1080; etc... When I need to access any of these settings form JavaScript, i simply use to substitute the value directly, but it just doesn't strike me as very robust. Are they any dangers of doing this that I am not aware of? Is there a better way of doing this? Thank you,

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  • number of elements in a static array of a predefined size

    - by cppb
    I have an array like this: int a[100]; I am filling only the first 4 elements in this array: a[0] = 1; a[1] = 2; a[2] = 3; a[3] = 4; When I do sizeof(a)/sizeof(a[0]) it returns 100. Is there a way I can get number of elements to which I have assinged a value and thus filtering out the remaining 96 unassigned elements? thanks

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  • What does "the application failed to initialize properly" mean?

    - by Mason Wheeler
    I just got a bug report from someone running an app I wrote under Windows XP. He says it won't start up. The application failed to initialize properly (0xc0150002). Click on OK to terminate the application. It works fine at my end, (under Windows 7,) and I don't have any Win7- or Vista-specific stuff in the program, so it should work on XP too. How do I go about tracking this down and debugging it?

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  • 'Static/Constant' business ojects

    - by UpTheCreek
    I don't quite know how to ask this question, so I'll phase it as an example: Imagine in an application you have a Country object. There are two properties of this object: Name, and a 'Bordering Countries' collection. More properties might be added later, but it will be the kind of information that would change very rarely (e.g. changes of country names/borders) Lets say this application needs to know about all of the countries in the world. Where would you store these object's state? How would you new them up? It seems silly to store all this state in the DB, since it won't change very often. One option might be to have an abstract 'country' base object, and have a class for each country inheriting from this with the details of each country. But this doesn't seem quite right to me. What is the proper way of dealing with these kinds of objects?

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  • Why does the Java compiler complain about a local variable not having been initialized here?

    - by pele
    int a = 1, b; if(a > 0) b = 1; if(a <= 0) b = 2; System.out.println(b); If I run this, I receive: Exception in thread "main" java.lang.Error: Unresolved compilation problem: The local variable b may not have been initialized at Broom.main(Broom.java:9) I know that the local variables are not initialized and is your duty to do this, but in this case, the first if doesn't initialize the variable?

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