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  • Cocoa Touch: Why doesn't UINavigationController render 'Back' button?

    - by Joshua
    When I push a view controller it animates properly and slides in, the only problem is that no 'Back' button is rendered up top.The back button is still there, I can still tap it, it just doesn't render on the screen. This behavior is identical in both the simulator and on multiple devices. Is this a known issue or bug? Using 3.1.3 of the iPhone SDK. More information: It renders it for further levels, just not on the second level of nav controller. So Main Page (No back button - OK). Second level page (back button, but doesn't render - not OK). Third level page (Back button there and rendering - OK).

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  • TSQL Check Database Instance Online

    - by David in Dakota
    What is the best way to check if an instance of Microsoft SQL Server is up? I have a view that spans two instances of Microsoft SQL Server but before querying it in a stored procedure I would like to verify that the second instance of the server is up with a fallback option of just querying local data. The second instance is a linked server. Currently I'm considering a SQL CLR function that can attempt to open a connection with a shorter timeout but I'm wondering if it's something that can be done directly in Transact SQL.

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  • How to structure (normalize?) a database of physical parameters?

    - by Arrieta
    Hello: I have a collection of physical parameters associated with different items. For example: Item, p1, p2, p3 a, 1, 2, 3 b, 4, 5, 6 [...] where px stands for parameter x. I could go ahead and store the database exactly as presented; the schema would be CREATE TABLE t1 (item TEXT PRIMARY KEY, p1 FLOAT, p2 FLOAT, p3 FLOAT); I could retrieve the parameter p1 for all the items with the statement: SELECT p1 FROM t1; A second alternative is to have an schema like: CREATE TABLE t1 (id INT PRIMARY KEY, item TEXT, par TEXT, val FLOAT) This seems much simpler if you have many parameters (as I do). However, the parameter retrieval seems very awkward: SELECT val FROM t1 WHERE par == 'p1' What do you advice? Should go for the "pivoted" (first) version or the id, par, val (second) version? Many thanks.

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  • What is the best way to have a dynamic dropdownlist in PHP and POST selected value

    - by mouthpiec
    Hi, I am writing the following in PHP: i would like to have 2 dropdownlists, where the second one is populated from a mySQL dB according to the choice made on the first dropdown list. Then I would like to use the values of the selected values of the dropdownlist to call another PHP page in which I will generate a db query. Eg: List A: Car Manufactures (honda, nissan, etc) List B: Models (accord, civic, etc) Then I will have a submit button, to POST the values in another PHP file? (I have the basics of how to perform the above without having a dynamic list, but I tried this with AJAX, but I am having problems to pass the value of the second dropdownlist) Any tips of how I can perform the above?

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  • Reverse List<Object>

    - by Mercer
    Hello, i have a List List<DataClient> listDataClient; My class DataCLient: Client client; List<String> phoneNumber; i have a second list List<DataPhoneNumber> listPhoneNumber; My class DataPhoneNumber: String phoneNumber; List<Client> client; In my code i put data in my first list but now i want to reverse my list in the second. In the first list i have a Client wiht x NumberPhone now i want to have NumberPhone for x Client

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  • Ideas for building vulnerabilities into your site?

    - by Jaco Pretorius
    I'm trying to create a programming challenge that would require developers to hack into the MVC site I create. The idea is obviously to teach them about preventing these types of attacks. The current idea I have is to build multiple vulnerabilities into the site - but the second vulnerability would require the first to be completed, etc. So I was thinking the first could be a sql injection attack, the second would require a modified GET request, etc. Exploiting the final vulnerability would reveal a specific piece of information which is proof that you have completed the entire challenge. This will not be deployed on a public site - it's simply a learning tool for developers at my company. I'm not looking for MVC-specific vulnerabilities - I'm simply using MVC because it allows me to work with the 'raw' HTML. Any ideas on the different vulnerabilities I can use?

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  • Using numeric values to select item from a dropdown box with JavaScript

    - by Shyam
    Hi, I have a multitude of dropdown boxes within my webpage. One of these dropdown boxes is used for a single selected value out of a list of options. <SELECT id="Box0" name=""> <OPTION value="0">none</OPTION> <OPTION value="1">first</OPTION> <OPTION value="2">second</OPTION> </SELECT> How can I add an event to this section, so when it is in focus, I could use numeric keys like 1,2.. to select an option instead of using the mouse or arrow keys for selecting an option? For clarification: if I press "1" on my keyboard, the selected value would become "first", with "2" the selected value becomes "second". I choose not to use a library/framework such as JQuery/Mootools. Thanks,

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  • Using Timer only once

    - by zaidwaqi
    Hi, I want to use a timer only once, at 1 second after the initialization of my main form. I thought the following would have a message box saying "Hello World" just once, but actually a new message box says "Hello World" every one second. Why so? I had put t.Stop() in the tick event. Also, do I need to dispose the timer somehow to avoid memory leakage? Timer t = new Timer(); t.Interval = 1000; t.Tick += delegate(System.Object o, System.EventArgs e) { MessageBox.Show("Hello World"); t.Stop(); }; t.Start(); Please help and show if there is a better way of doing this? Thanks.

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  • Cloning a selector + all its children in jQuery?

    - by HipHop-opatamus
    I'm having trouble getting the following JQuery script to function properly - its functionality is as follows: 1) Hide the content below each headline 2) Upon clicking a headline, substitute the "#first-post" with the headline + the hidden content below the headline. I can only seem to get the script to clone the headline itself to #first-post, not the headline + the content beneath it. Any idea why? <HTML> <HEAD> <script src="http://code.jquery.com/jquery-latest.js"></script> </HEAD> <script> $(document).ready( function(){ $('.title').siblings().hide(); $('.title').click( function() { $('#first-post').replaceWith($(this).closest(".comment").clone().attr('id','first-post')); $('html, body').animate({scrollTop:0}, 'fast'); return false; }); }); </script> <BODY> <div id="first-post"> <div class="content"><p>This is a test discussion topic</p> </div> </div> <div class="comment"> <h2 class="title"><a href="#1">1st Post</a></h2> <div class="content"> <p>this is 1st reply to the original post</p> </div> <div class="test">1st post second line</div> </div> <div class="comment"> <h2 class="title"><a href="#2">2nd Post</a></h2> <div class="content"> <p>this is 2nd reply to the original post</p> </div> <div class="test">2nd post second line</div> </div> </div> <div class="comment"> <h2 class="title"><a href="#3">3rd Post</a></h2> <div class="content"> <p>this is 3rd reply to the original post</p> </div> <div class="test">3rd post second line</div> </div> </div> </BODY> </HTML>

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  • asp.net session error

    - by umeshchaurasia
    HI all, I am working with asp.net with c#.net Here i am using session state to pass the value from one page to another. i have two pages, in first page i am calculating the value and passing the value to second page using session and in second page i am displaying the message through the value. I am using these two pages for facebook application. I uploaded my two pages then i am checking with facebook by opening through internet explorer and its giving below error. Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object. But when i open my application using firefox the pages are working fine. please help me...

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  • Insert into a generic dictionary with possibility of duplicate keys?

    - by Chris Clark
    Is there any reason to favor one of these approaches over the other when inserting into a generic dictionary with the possibility of a key conflict? I'm building an in-memory version of a static collection so in the case of a conflict it doesn't matter whether the old or new value is used. If Not mySettings.ContainsKey(key) Then mySettings.Add(key, Value) End If Versus mySettings(key) = Value And then of course there is this, which is obviously not the right approach: Try mySettings.Add(key, Value) Catch End Try Clearly the big difference here is that the first and second approaches actually do different things, but in my case it doesn't matter. It seems that the second approach is cleaner, but I'm curious if any of you .net gurus have any deeper insight. Thanks!

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  • SQl Server: serializable level not working

    - by Zé Carlos
    I have the following SP: CREATE PROCEDURE [dbo].[sp_LockReader] AS BEGIN SET NOCOUNT ON; begin try set transaction isolation level serializable begin tran select * from teste commit tran end try begin catch rollback tran set transaction isolation level READ COMMITTED end catch set transaction isolation level READ COMMITTED END The table "test" has many values, so "select * from teste" takes several seconds. I run the sp_LockReader at same time in two diferent query windows and the second one starts showing test table contents without the first one terminates. Shouldn't serializeble level forces the second query to wait? How do i get the described behaviour? Thanks

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  • Unicorn: Which number of worker processes to use?

    - by blackbird07
    I am running a Ruby on Rails app on a virtual Linux server that is capped at 1GB RAM. Currently, I am constantly hitting the limit and would like to optimize memory utilization. One option I am looking at is reducing the number of unicorn workers. So what is the best way to determine the number of unicorn workers to use? The current setting is 10 workers, but the maximum number of requests per second I have seen on Google Analytics Real-Time is 3 (only scored once at a peak time; in 99% of the time not going above 1 request per second). So is it a save assumption that I can - for now - go with 4 workers, leaving room for unexpected amounts of requests? What are the metrics I should have a look at for determining the number of workers and what are the tools I can use for that on my Ubuntu machine?

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  • How to create a "sidebar" in Umbraco CMS?

    - by usr
    In Umbraco, every page has a content field that you can edit in the admin-area. What I want would be a second content field that I (actually my customer who will be editing the content by himself) can edit on every page. I would then create a masterpage/template that contains the two content areas (the first one as the main content and the second one as the sidebar). At least this is how I would do it. Is this possible or is there even a better approach for having a main content and a separate sidebar on every page?

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  • Custom dynamic listview in wpf for showing combobox ?

    - by Indigo Praveen
    Hi All, I want to create an application in WPF in which I have to create a gridview kind of control and in that I'll have two columns, first column is fixed but in the second column I have to create comboboxes at runtime. For example if I have a setting like <key="Level" Value="1,2,3,4,5"/> then the first column will have Level and the second column will have a combobox with values 1,2,3,4,5. Can anyone please suggest me the right WPF control to use in this scenario and how it can be done ?

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  • java - how to split string in to multiple parts?

    - by Ewen
    I have a string that contains a value "firstword second third", and an ArrayList. I want to split the whole string in to by spaces and add the splitted strings in to the ArrayList. For example,"firstword second third" can be split to three separate strings and added three times in to the ArrayList. "1 2 3 4" can be splitted in to 4 strings and added 4 times in to the ArrayList. See the code below: public void separateAndAdd(String notseparated) { for(int i=0;i<canBeSepartedinto(notseparated);i++{ //what should i put here in order to split the string via spaces? thearray.add(separatedstring); } } public int canBeSeparatedinto(String string) //what do i put here to find out the amount of spaces inside the string? return .... } Please leave a comment if you dont get what I mean or I should fix some errors in this post. Thanks for your time!

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  • Controlling LaTeX column flow

    - by hdhermans
    What I'm trying to do: I have a page that consists of pairs of two sentences each. The pairs are separated by a whole line break. My problem is that when I have an odd number of pairs, the second sentence will automatically be placed on the next column. How can I use LaTeX to make block structures that multicol does not ignore, to keep the two sentences together? If there's better code to solve this problem, or a better column implementation (though I don't believe I can use \twocolumn in the document declaration), please post it. My current code: \documentclass{article} \usepackage{fullpage} \usepackage{multicol} \setlength{\parindent}{0pt} \setlength{\parskip}{\baselineskip} \newcommand{\pair}[2]{ \emph{#1}\\* #2 } \begin{document} \begin{multicols}{2} \pair{Sentence 1.}{Sentence 2.} \pair{Sentence 2 (pair 2).}{Sentence 2 (pair 2).} \pair{The last pair, first sentence.}{Last sentence.} \end{multicols} \end{document} This generates: http://img541.imageshack.us/img541/3444/columns.png . The second pair is what I am trying to avoid.

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  • Debug a local maven dependency with eclipse

    - by mcamier
    i have two maven projects, the first one is a library and the other one use it to works properly, the both have to elvolve regardless each other, this is why i use two different project. But breakpoints on my library code doesn't work when i launch my app (the second application). This is how i include my library in the second project's POM (my IDE is eclipse and projects are in the same workspaces) <dependency> <groupId>com.mcamier</groupId> <artifactId>lazyEngine</artifactId> <version>0.0.1-SNAPSHOT</version> <scope>system</scope> <systemPath>${basedir}/../lazyEngine/target/lazyEngine-0.0.1-SNAPSHOT-jar-with-dependencies.jar</systemPath> </dependency>

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  • Using CreateFileMapping between two programs - C

    - by Jamie Keeling
    Hello, I have two window form applications written in C, one holds a struct consisting of two integers, another will receive it using the CreateFileMapping. Although not directly related I want to have three events in place so each of the processes can "speak" to each other, one saying that the first program has something to pass to the second, one saying the first one has closed and another saying the second one has closed. What would be the best way about doing this exactly? I've looked at the MSDN entry for the CreateFileMapping operation but I'm still not sure as to how it should be done. I didn't want to start implementing it without having some sort of clear idea as to what I need to do. Thanks for your time.

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  • Weblogic Apache plugin and session stickiness

    - by h4tech
    If two webserver are configured in between a load balancer and weblogic cluster, will the two Apache server maintain session stickiness.?? Say for e.g. the load balancer forwards the first request to the 1st apache and inturn 1st apache forwards to 1st WL managed instance.Even if the second req from the same user is forwarded by the load balancer to the second apache, will the sec apache be able to forward it to the 1st WLManaged instance which served the first request rather than the sec WLManaged instance which is not aware of the session information at all.What should ideally be the behaviour of weblogic apache plugin??.Catch is i dont want ot enable the session replication @ the wl server cluster..Pls help.

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  • extra AuthorizationRule in web.config AuthorizationSection

    - by H07R0D
    I'm trying to modify the list of allowed users in web.config from a codebehind. <authorization> <allow users="alice, bob"/> <deny users="*"/> </authorization> I successfully retrieve the section I need config = WebConfigurationManager.OpenWebConfiguration("~"); authSection = (AuthorizationSection)config.GetSection("system.web/authorization"); When I iterate looking for the allow rule, I get two of them. foreach (AuthorizationRule rule in authSection.Rules) { if (rule.Action == AuthorizationRuleAction.Allow) { // manage the Users StringCollection } } The first item I get has 'alice' and 'bob' in the Users collection. The SECOND item I get has * Where is this second entry coming from? This is an Allow Rule, not a Deny rule. I could understand the * from a Deny rule. Is there some extra inheritance I'm not aware of?

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  • Can I move the order of XCode, Cocoa, and User Templates around in XCode 3.1?

    - by Warren P
    I followed the other questions on StackOverflow and made custom User Templates. Instead of replacing the factory default Cocoa class template, I have to pick a new user template. The order that is shown in XCode's New File dialog box is: iPhone templates first (great if you mostly do iphone development) Second the User templates Third the default Mac OS templates. I want my user stuff first, Mac OS templates second, and I want to bury iPhone templates in third and last place. The sort is obviously not alphabetical. And you can't drag/drop reorder. (At least not in xcode 3.1.3)? From stackoverflow

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  • Gracefully avoiding NullPointerException in Java

    - by Yuval A
    Consider this line: if (object.getAttribute("someAttr").equals("true")) { // .... Obviously this line is a potential bug, the attribute might be null and we will get a NullPointerException. So we need to refactor it to one of two choices: First option: if ("true".equals(object.getAttribute("someAttr"))) { // .... Second option: String attr = object.getAttribute("someAttr"); if (attr != null) { if (attr.equals("true")) { // .... The first option is awkward to read but more concise, while the second one is clear in intent, but verbose. Which option do you prefer in terms of readability?

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  • Morphing content based on window part focus

    - by Adrian A.
    What I'm trying to achieve is basically have a code that will morph ( move around the page ) based on the part of the window which is currently viewed. Scenario : - actual page height : 2000px - actual screen height( pc, laptop whatever ) : 800px - 1 image of 600px - 3 div's or virtual boxes ( just to prove what I want to do ) Workflow When you open the page, you'd see the first part of the page with the image loaded in the first div. What I want and need to achieve is when scrolling the page, and the focus would be on the second div ( or the image simply gets out of focus - you can't see it no more ), the image would move ( disappear from the first box ) and appear in the second one, which is currently visible. The idea might seem pretty easy but I'm not Javascript savvy. Ideally, the answer should include a way to load a Javascript instead of that image.

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  • Can we you the attached properties in C# class library?

    - by Manas Agarwal
    Hi I have implemented the Observer Pattern with lazy load. The class that requests the data from the database is a singleton class. Now I am able to load the data from one database (located in one datacenter) very easily. But I need to get the data from other data centers too and display on the same UI. I can somehow pass the address of second data center and fetch the data from there also. But once I will get the data from second data center, it will be added to earlier list only. So later it will be thought for me to distinguish between the data. So I thought of attaching a property with the result set, so that while displaying the output I can show the data for both the data centers separately but on the same UI. I thought of attached property as an option where I can attach the data center name with the list of the data obtained. How is it possible to do in C#? Thanks Manas

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