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  • What is the most efficient way to list all of the files in a directory (including sub-directories)?

    - by prometheus
    I am writing a servlet which will examine a directory on the server (external to the web container), and recursively search for certain files (by certain files, I mean files that are of a certain extension as well as a certain naming convention). Once these files are found, the servlet responds with a long list of all of the found files (including the full path to the files). My problem is that there are so many files and directories that my servlet goes extremely slow. I was wondering if there was a best practice or existing servlet for this type of problem? Would it be more efficient to simply compile the entire list of files and do the filtering via js/jquery on the client side?

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  • mysql multiple where and inner join query combination

    - by bandhunt
    I'm a little lost as how to run two mysql queries as one(return one result set to be sorted etc). I understand how to do multiple JOINS but need to combine the below which is more than just a multiple join - it would include a multiple where etc. 1st query sql = "SELECT s.id, s.song_name FROM `songs` as s INNER JOIN `artists` as a ON s.artist_id = a.id WHERE ((`a`.id = #{search}))" 2nd query sql = "SELECT s.id, s.song_name FROM `songs` as s INNER JOIN `similarments` as si ON s.artist_id = si.artist_id WHERE ((`si`.similar_id = #{search}))" And then run both queries at once so I can ORDER them etc. Or combine them as one big query (maybe put an OR somewhere)? Thanks!

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  • Expected Class-name before { token

    - by ML
    Hi All, I am trying to figure out whey I get an error: expected class-name before { token Here is the relative source to the error: #pragma once #ifndef H_FXACTION #define H_FXACTION #include "CP_M_RefCounted.h" #include "FxTypes.h" #include "string" #include "FxString.h" #include "FxPixels.h" #include "CP_Rect.h" #include "FxStreamable.h" #include "FxPoint.h" #include "FxPtr.h" #include "FxImage.h" #include "FxSleekStreaming.h" typedef FxID FxActionType; typedef FxUInt32 FxActionID; FxActionID FrMakeUniqueActionID(void); class FxActionData; class FxActionData : public CP_M_RefCounted { public: FxActionData(); FxActionData(FxBool final) :mFinal(final) { } virtual ~FxActionData(); I get the error at this line: class FxActionData : public CP_M_RefCounted What I dont get is why the line: class FxActionData; is there when you are creating the class directly under it. Isn't this a forward declaration? What things could be going on here?

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  • Seam log4j credential logs

    - by Marc
    In Seam, using log4, I would like to have my info, warn and error always logging the logged in user (if so) name to be logged with whatever the log message is. Being a consistant thing I do not want to have to grab the logged-in user name, and prefix the message. so I attempted to populate the log4j NDC to have it as a field of the log message. Pushing the user name on successful login: NDC.push(credentials.getUsername()); Which works, but the NDC is managed per thread, so once another thread processes a request from the same logged in user, the trace of this user name is lost. I was thinking that there should be a common pattern to accomplish this simple task which is attaching each log message to the logged user, using the NDC or not, to know exactly what user triggered what action. Anyone knows the appropriate way to accomplish this?

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  • Updating Many-to-Many relationship with LinqToSQL

    - by Noffie
    If I had, for example, a Many-to-Many mapping table called "RolesToUsers" between a Users and an Roles table, here is how I do it: // DataContext is db, usr is a User entity // newUserRolesMappings is a collection with the desired new mappings, probably // derived by looking at selections in a checkbox list of Roles on a User Edit page db.RolesToUsers.DeleteAllOnSubmit(usr.RolesToUsers); usr.RolesToUsers.Clear(); usr.RolesToUsers.AddRange(newUserRolesMappings); I used the SQL profiler once, and this seems to generate very intelligent SQL - it will only drop the rows which are no longer in the mapping relationship, and only add rows which did not already exist in the relationship. It doesn't blindly do a complete clearing and re-construction of the relationship, as I thought it would. The internet is surprisingly quiet on the subject, and the query "LinqToSQL many-to-many" mostly just turns up articles about how the LinqToSQL data mapper doesn't "support" it very well. How does everyone else update many-to-many with LinqToSQL?

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  • Vim: Replacing a line with another one yanked before

    - by duddle
    At least once per day i have the following situation: A: This line should also replace line X ... X: This is line should be replaced I believe that I don't perform that task efficiently. What I do: Go to line A: AG Yank line A: yy Go to line X: XG Paste line A: P Move to old line: j Delete old line: dd This has the additional disadvantage that line X is now in the default register, which is annoying if I find another line that should be replaced with A. Yanking to and pasting from an additional register ("ayy, "aP) makes this simple task even less efficient. My Questions: Did I miss a built-in Vim command to replace a line yanked before? If not, how can I bind my own command that leaves (or restores) the yanked line in the default register?

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  • Copy an array backwards? Array.Copy?

    - by daniel
    I have a List<T> that I want to be able to copy to an array backwards, meaning start from List.Count and copy maybe 5 items starting at the end of the list and working its way backwards. I could do this with a simple reverse for loop; however there is probably a faster/more efficient way of doing this so I thought I should ask. Can I use Array.Copy somehow? Originally I was using a Queue as that pops it off in the correct order I need, but I now need to pop off multiple items at once into an array and I thought a list would be faster.

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  • Keeping track of dirty blocks on a block device

    - by mikeY
    I'm looking for a way to keep track of what blocks on a block device are modified after a point in time. How I eventually want to use this for is to keep two 2TB disks in sync, one which only comes online (connected through USB) once a month. Without knowing what blocks have been modified, I have to go through the whole 2TB every time. I'm using a recent GNU/Linux OS and have C and Python experience. I'm hoping to avoid writing kernel level code as I don't have any experience in that area whatsoever. My current theory is that there should be some hooks somewhere where my code can get called when a disk flush is performed. Any ideas?

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  • Vertically center CSS techniques don't work in Chrome

    - by at.
    I've gone through stackoverflow questions and a whole bunch of articles on vertically centering text like the following: http://blog.themeforest.net/tutorials/vertical-centering-with-css/ None of the techniques seem to work with the latest version of Chrome. Is that just the nature of Chrome? My text just always appears at the top. It seems that whenever I use 50% or 100% as values for CSS's height or top, nothing happens. I just need a single line of text vertically centered. line-height isn't helpful because I want it centered in the middle of the browser window... I don't know how tall the browser window is going to be. UPDATE: The problem is apparently Foundation 4. Once I delete the following everything works as expected: <link href="/assets/foundation_and_overrides.css?body=1" media="screen" rel="stylesheet" /> Any idea on how to make it work with Foundation 4?

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  • Will using a VCS help me as a web dev?

    - by jsims281
    I'm thinking of trying a VCS such as subversion, to manage my next project, but I'm not sure if will offer any real benefits for me as a web developer. As I understand it, one of the major benefits of a VCS is that a group of people can work on a project at once. Reading material on the subject seems pretty one sided: "Using a version control system is an absolute must for a developer of a project above a few hundred lines of code" ...and I've got a feeling it could become a chore, with not many benefits. I work on development server on the local network, so any amount of people can work on the files already. If anyone needs to get in remotely, they use FTP. What would a modern version control system give me on top of this?

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  • .NET Forms Abstraction for WPF, Silverlight, Winforms, WebForms, etc...

    - by tyndall
    Anyone know of a project(s) that seek to abstract form definitions on level higher than WPF, Silverlight, Winforms, WebForms, etc... I'm working on a project where we are fixing up 16 somewhat simple WebForms. But we may convert (and probably will convert to WPF or Silverlight 3 to 4 months from now. I'd rather define these forms once and be done with it. I'm willing to write a small DSL to help define forms, subforms, validation, links, and popups. I'm only looking to solve this for 80% or 90% of the forms. Four are very complicated and I'm willing to hand code these. I guess I'm looking for something like what XUL had hoped to be.

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  • Browser extensions to re-render the page using an updated version of my CSS file, without reloading the page itself

    - by Eduardo León
    I want to learn Web UI design. (I know, I know. Being a programmer puts me at a disadvantage. But I want to try anyway.) Thus, I would like to "debug" my CSS files. Once of the biggest annoyances I have found is that I cannot test a change in my CSS files without reloading the whole page. Sometimes, the page is too big. Sometimes, a lot of elements were brought to the page after lots of clicks, because my pages rely too heavily on AJAX. Sometimes, I just hate hitting Command+R all the time. Is there any extension for any of the major browsers (preferably Safari and/or Chrome) that re-renders the page using an updated version of the CSS file, without reloading the whole page itself?

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  • Facebook page linking to external site sign-up process, capture permission to write to wall in process?

    - by steve
    Hi all, Have had a good hunt through the archive but can't find anyone trying to do this... hope someone familiar with the facebook API can confirm if it's possible? Basically I have a client who wants to replicate their membership sign up process in a tab on their facebook page. The form would still submit to their own website to process, we'd just be replicating the form fields. As an additional requirement they want to capture peoples facebook user ID and get permission to post back to a users wall at the same time... The idea being that once the user is a member we can post back to their wall so their friends see that they've signed up... Basically after a sanity check that: 1) these things are possible to do; 2) the best method to build the form in a FB page - I'm guessing using JS to create all fields & ajax to submit to the external site? Thanks Steve

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  • OpenGL Vertex Array/Buffer Objects

    - by sadanjon
    Question 1 Do vertex buffer objects created under a certain VAO deleted once that VAO is deleted? An example: glGenBuffers(1, &bufferObject); glGenVertexArrays(1, &VAO); glBindVertexArray(VAO); glBindBuffer(GL_ARRAY_BUFFER, bufferObject); glBufferData(GL_ARRAY_BUFFER, sizeof(someVertices), someVertices, GL_STATIC_DRAW); glEnableVertexAttribArray(positionAttrib); glVertexAttribPointer(positionAttrib, 3, GL_FLOAT, GL_FALSE, 0, NULL); When later calling glDeleteVertexArrays(1, &VAO);, will bufferObject be deleted as well? The reason I'm asking is that I saw a few examples over the web that didn't delete those buffer objects. Question 2 What is the maximum amount of memory that I can allocate for buffer objects? It must be system dependent of course, but I can't seem find an estimation for it. What happens when video RAM isn't big enough? How would I know?

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  • Can i configure emacs to use gdb like a graphical debugger?

    - by Joey Carson
    I'm pretty sure that this how other IDE's do it, e.g. on windows eclipse uses the output of gdb from MinGW (the windows port of GNU toolchain) to map where execution is in the source code and what values variables hold, etc. I'm stuck using gdb via a script that prepares our application in a chroot and does some other bootstrap for debug purposes. Once the script starts moving, the output is all gdb. Is there any way that I can configure emacs so that it will use gdb's output and allow for a sort of graphical debugger, comparable to that of eclipse or ms visual studio?

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  • Please clarify a few points concerning Java Servlets

    - by EugeneP
    suppose, I use Tomcat as a web container. Is it true that once all the servlets found in a web-app/WEBAPPNAME are init(IALIZED) then every change of a Servlet's property will be seen to every session. So session 1 changes a property userName of a Servlet1 from "user1" to "user2" session 1 is closed. session 2 starts. It will see "user2" as the only value of Servlet1.userName property?? Any change of a Servlet's field will be seen to all subsequent sessions? Are servlets singletons, aren't they?

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  • Exposing entities via a nHibernate implementation RIA Services with querystring queries

    - by illdev
    I once read a blog post and cannot find it anymore. drat! It was about a guy who setup a wcf service (I guess RIA, but could have been something else) exposing the model via IQueryable to the querystring. Sou you could say http://host/articles/123/ratings and you'd get a list (soap or json) of serialized Rating entities (the properties which had some attribute attached) which pertained to an article with id 123. All this with nHibernate / nh linq in the back and in surprisingly few lines of code. Anyone knows what I am talking about? Experiences, suggestions?

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  • Two parallel line segments intersection

    - by Judarkness
    I know there are many algorithms to verify whether two line segments are intersected. But once they encountered parallel condition, they just tell the user a big "No" and pretend there is no overlap, share end point, or end point collusion. I know I can can calculate the distance between 2 lines segments. If the distance is 0, check the end points located in the other line segments or not. And this means I have to use a lot of if else and && || conditions. This is not difficult, but my question is "Is there a trick( or mathematics) method to calculate this special parallel case?"

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  • Displaying menus on image

    - by Snehal
    Hi all, Here is what i am doing: I have a viewcontroller screen1 to which I have added long press gesture. On longPress, user will get draw menu. On selecting that menu, i am creating another uiviewcontroller class object which has a rectangle image. This instance i am adding as a subview to screen1. Now what i want is that once the image is displayed on the screen1, i want to display UImenuItems Done and cancel above the image drawn so that on tapping on done menu, the image is saved. I tried making the new viewcontroller as firstResponder after adding image to screen1 but the menus are not visible. Any one please help

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  • Is it possible to make a PHP script run itself every hour or so without the use of a cronjob?

    - by Rob
    I'm pretty sure I've seen this done in a php script once, although I cant find the script. It was some script that would automatically check for updates to that script, and then replace itself if there was an update. I don't actually need all that, I just want to be able to make my PHP script automatically run every 30 minutes to an hour, but I'd like to do it without cronjobs, if its possible. Any suggestions? Or is it even possible? EDIT: After reading through a possible duplicate that RC linked to, I'd like to clarify. I'd like to do this completely without using resources outside of the PHP script. AKA no outside cronjobs that send a GET request. I'd also like to do it without keeping the script running constantly and sleeping for 30 minutes

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  • Understanding CGI and SQL security from the ground up

    - by Steve
    This question is for learning purposes. Suppose I am writing a simple SQL admin console using CGI and Python. At http://something.com/admin, this admin console should allow me to modify a SQL database (i.e., create and modify tables, and create and modify records) using an ordinary form. In the least secure case, anybody can access http://something.com/admin and modify the database. You can password protect http://something.com/admin. But once you start using the admin console, information is still transmitted in plain text. So then you use HTTPS to secure the transmitted data. Questions: To describe to a learner, how would you incrementally add security to the least secure environment in order to make it most secure? How would you modify/augment my three (possibly erroneous) steps above? What basic tools in Python make your steps possible? Optional: Now that I understand the process, how do sophisticated libraries and frameworks inherently achieve this level of security?

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  • Writing an Eval Procedure in Scheme?

    - by Planeman
    My problem isn't with the built-in eval procedure but how to create a simplistic version of it. Just for starters I would like to be able to take this in '(+ 1 2) and have it evaluate the expression + where the quote usually takes off the evaluation. I have been thinking about this and found a couple things that might be useful: Unquote: , (quasiquote) (apply) My main problem is regaining the value of + as a procedure and not a symbol. Once I get that I think I should just be able to use it with the other contents of the list. Any tips or guidance would be much appreciated.

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  • Submitting a form from Email

    - by bubbl
    I was working on a project to submit a form from an email. The scenario is this. We will send a form to list of emails where in the customer has to fill in the form and once they hit submit, the form should be submitted and server should be able to retrieve the values that is provided by the person filling in.When i tried, it was not considering the submit button as form submit and no action is being performed. Can anyone help me to resolve this. Thanks in advance.

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  • need to run php script when form is submitted

    - by Brad
    I have a form that needs to run a php script once the submit button is clicked, it needs to be ajax. <form method="post" action="index.php" id="entryform" name="entryform"> <input type="submit" name="submit" value="Submit" onclick="JavaScript:xmlhttpPost('/web/ee_web/include/email-notification.php', 'entryform')" /> </form> In this situation, using if(form posted) { get results and run script } is not an option, I need to run the script externally, that is why I need it to execute the email-notification.php at onclick When I point my web browser to domain.com/include/email-notification.php - it runs perfectly. Any help is appreciated.

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  • Using True and False to select items to print

    - by user1753915
    I have a workbook that contains rows of information that needs to printed to a seperate worksheet in excel. I am trying to utilize a checkbox to indicate which items need to print and which items need to be skipped. The checkbox is located in column "A" and once checked and the macro ran, I want it to pick up the data in each cell of that particular row, transfer it a seperate worksheet (form), prompt and save the worksheet to pdf, clear the form, and then return to the main worksheet to continue until all rows have been checked. However, right now, my code is only looping through the very first "TRUE" statement and not continuing to the rest. Here is the code: Private Sub CommandButton1_Click() On Error GoTo ErrHandler: Dim i As Integer For i = 1 To 10 If ActiveSheet.OLEObjects("CheckBox" & i).Object.Value = False Then Else If ActiveSheet.OLEObjects("CheckBox" & i).Object.Value = True Then Call PrintWO Else End If Do Until ActiveSheet.OLEObjects("CheckBox" & i).Object.Value = 10 MsgBox "Nothing Selected to Print" Exit Do Exit Sub Loop End If Next i ErrHandler: End Sub

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