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  • what's wrong in File.Exist() method?

    - by Arseny
    Reading some answers with code samples I notice that those where this method mentioned are subjected to criticism. I'm using this method in my code. So I'd like to know if someone give me detailed response whuy this method is not recomemnded and what alternative approaches are?

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  • Object or primitive type

    - by John
    Hi, Can someone explain to me the usage of Integer, Boolean etc in place of their primitive types in JAVA? I can't seem to grasp the advantages their are providing. They seem to create unnecessary problems of handling null values. Thanks!

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  • Highlight the first row in a ListView and a ListBox Control

    - by Bill
    I am attempting to show both a ListView and ListBox on a Windows Form (C#). The difficulty I am having is in having the first row for both the ListView and ListBox highlighted when the application opens. Could someone please steer me in the right direction so that the first row of both the ListView and ListBox are highlighted when the application opens?

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  • Priority queue with dynamic item priorities.

    - by sean
    I need to implement a priority queue where the priority of an item in the queue can change and the queue adjusts itself so that items are always removed in the correct order. I have some ideas of how I could implement this but I'm sure this is quite a common data structure so I'm hoping I can use an implementation by someone smarter than me as a base. Can anyone tell me the name of this type of priority queue so I know what to search for or, even better, point me to an implementation?

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  • JQuery and JSON - Add element

    - by Villager
    Hello, I have a JSON variable defined as: var myCollection = { "data": [ { "name":"Joe", "id":"1" }, { "name":"Bill", "id":"2" }, { "name":"Dave", "id":"3" } ] }; I have a JavaScript function that is responsible for adding items to the data element in myCollection. However, I'm not sure how to add a name/id pair to the collection via JavaScript. Can someone show me how to add to a JSON collection via JavaScript? Thank you!

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  • Having trouble understanding some code (Ruby on Rails)

    - by user284194
    I posted a question awhile ago asking how I could limit the rate at which a form could be submitted from a rails application. I was helped by a very patient user and their solution works great. The code was for my comments controller, and now I find myself wanting to add this functionality to another controller, my Messages controller. I immediately tried reusing the working code from the comments controller but I couldn't get it to work. Instead of asking for the working code, could someone please help me understand my working comment controller code? class CommentsController < ApplicationController #... before_filter :post_check def record_post_time cookies[:last_post_at] = Time.now.to_i end def last_post_time Time.at((cookies[:last_post_at].to_i rescue 0)) end MIN_POST_TIME = 2.minutes def post_check return true if (Time.now - last_post_time) > MIN_POST_TIME flash[:warning] = "You are trying to reply too fast." @message = Message.find(params[:message_id]) redirect_to(@message) return false end #... def create @message = Message.find(params[:message_id]) @comment = @message.comments.build(params[:comment]) if @comment.save record_post_time flash[:notice] = "Replied to \"#{@message.title}\"" redirect_to(@message) else render :action => "new" end end def update @message = Message.find(params[:message_id]) @comment = Comment.find(params[:id]) if @comment.update_attributes(params[:comment]) record_post_time redirect_to post_comment_url(@message, @comment) else render :action => "edit" end end #... end My Messages controller is pretty much a standard rails generated controller with a few before filters and associated private methods for DRYing up the code and a redirect for non existent pages. I'll explain how much of the code I understand. When a comment is created, a cookie is created with a last_post_time value. If they try to post another comment, the cookie is checked if the last one was made in the last two minutes. If it was a flash warning is displayed and no comment is recorded. What I don't really understand is how the post_check method works and how I can adapt it for my simpler posts controller. I thought I could reuse all the code in the message controller with the exception of the line: @message = Message.find(params[:message_id]) # (don't need the redirect code) in the post_check method. But it trips up on the "record_post_time" in the create action/method. I really want to understand this. Can someone explain why this doesn't work? I greatly appreciate you reading my lengthy question.

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  • Does anyone see any downsides of doing the following to prevent CSRF?

    - by Spines
    I'm wondering if the following method will completely prevent CSRF, and be compatible with all users. Here it is: In the form just include an extra parameter that is: encrypted(user's userID + request time). Server-side just decrypt and make sure it's the right userID and the request time was reasonably recent. Aside from someone sniffing the user's traffic, is this completely secure? Are there any downsides?

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  • How do you get the language from a session in Joomla?

    - by Moak
    I have some code that sets the lang var to the site default language. $lg = &JFactory::getLanguage(); $lg = explode('-',$lg->_default); $dlg = $lg[0]; if(!JRequest::getWord('lang', false )) JRequest::setVar('lang', $dlg ); however before setting it to $dlg I would like to find out if the language is stored in the user information or session. Can someone tell me how to check the session for language information?

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  • How to show different icons in Crystal reports depending on the field value?

    - by DarkDeny
    We are using Crystal Report 12 in one of our projects. Currently I need to create report template which should show different icons based on the some field value. That field contains a number, storing some kind of status and I have several icons corresponding some statuses. At the moment I can't figure out how to implement such a thing in Crystal Reports designer. Could someone please help me?

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  • Is there a replacement for Paste.Template?

    - by Jorge Vargas
    I have grown tired of all the little issues with paste template, it's horrible to maintain the templates, it has no way of updating an old project and it's very hard to test. I'm wondering if someone knows of an alternative for quickstart generators as they have proven to be useful.

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  • How to get the measures of an object from far away?

    - by Luis Armando
    I am working on an App that intends to give an accurate measure of any object (building, desk, chair, people, etc.) Using the camera (either phone's or laptop) but I'm unsure as to how to do this without using a lot of resources, would someone mind giving me some options? I'm looking for a lightweight one that can be quickly processed by the computer/phone to give back the measures.

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  • Weird error using preg_match and unicode

    - by Thorpe Obazee
    if (preg_match('(\p{Nd}{4}/\p{Nd}{2}/\p{Nd}{2}/\p{L}+)', '2010/02/14/this-is-something')) { // do stuff } The above code works. However this one doesn't. if (preg_match('/\p{Nd}{4}/\p{Nd}{2}/\p{Nd}{2}/\p{L}+/u', '2010/02/14/this-is-something')) { // do stuff } Maybe someone could shed some light as to why the one below doesn't work. This is the error that is being produced: A PHP Error was encountered Severity: Warning Message: preg_match() [function.preg-match]: Unknown modifier '\'

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  • Is there a way to prevent a string of letters with no spaces from overflowing out of its correspondi

    - by Scarface
    The question is pretty straight forward, I have tried using a span with rules set to clear:both; and display:block;, at the bottom of each list entry where the text is being inserted in with no luck. I am not really sure what to do on this. I don't expect to many entries with long consecutive letter strings but for example if someone does lolololololol or ahaahahahhhhhhhhhhhhaaaaaaaa for like 100 letters, it will overflow. If anyone can give me a pointer I would really appreciate it.

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  • FBML + jquery Validation + Rails

    - by user359467
    Hi all, In my local machine i have a scaffold that uses Jquery Validation plugin for the field's validation. Now i want to add that to a fbml facebook application, but i'm haven't been able to load the jquery javascript and the jquery Validation plugin into the app, does anybody now how to do that? or maybe someone could suggest me a better way of doing validation inside a facebook application. Thanks in Advance Ernesto Carrión

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  • Does it matter where you get your CS degree

    - by Mark Lubin
    Does going to a less famous University that might not be terribly selective necessarily preclude someone from being considered from the elite software companies, i.e. Google or Microsoft regardless of my actual abilities? Furthermore how often do you find your alumni places a factor when looking for a job? Thanks again for the responses.

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