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• Ruby on Rails- :symbols, @iVars and "strings" - oh my!

  - by Meltemi

  New to Rails and trying to get my head around when/why to use :symbols, @ivars , "strings" within the framework. I think I understand the differences between them conceptually only one :symbol instance per project one @ivar per instance multiple "strings" - as they are created whenever referenced (?) Feel free to correct me! The main confusion comes from understanding the rules & conventions of what Rails expects - where and WHY? I'm sure there's an "Ah ha!" moment coming but I haven't had it yet...as it seems pretty arbitrary to me (coming from C/Obj-C). -thx

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• help regarding dynamic redirect rule in htaccess

  - by user251336

  hi all, I need ur help for given subject. I am playing with htaccess rules first time in life. here is the scene - i want to redirect the urls - http://www.abc.com/var1 http://www.abc.com/var2 to follwing urls - http://www.abc.com/index.php?u=var1 http://www.abc.com/index.php?u=var2 In this case the values var1 & var2 can be anything (i.e. string which will contain only alphanumeric characters.) One more thing - I want to skip this rule if the url is - http://www.abc.com/SKIPME Please help me to write this rule! Regards, Shahu!

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• Code Golf: All +-*/ Combinations for 3 integers

  - by Flash84x

  Write a program that takes 3 integers separated by spaces and perform every single combination of addition, subtraction, multiplication and division operations possible and display the result with the operation combination used. Example: $./solution 1 2 3 Results in the following output 1+2+3 = 6 1-2-3 = -4 1*2*3 = 6 1/2/3 = 0 (integer answers only, round up at .5) 1*2-3 = -1 3*1+2 = 5 etc... Order of operation rules apply, assume there will be no parenthesis used i.e. (3-1)*2 = 4 is not a combination, although you could implement this for "extra credit" For results where a divide by 0 occurs simply return NaN

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• Escaping and unescaping a string with single and double quotes in Javascript

  - by Reina

  I have a search box that a user can search for any string including single AND double quotes, once they have searched, the backend is passing the keyword back to me so I can put it back in the box. I don't know what the string is so I can't escape quotes myself, below is an example: var keyword = "hello"; $("#selectionkeywords").val(); The issue I am having is that if the user enters "hello" the keyword becomes ""hello"" and I get this error: missing ) after argument list [Break On This Error] jQuery("#selectionkeywords").val(""hello""); The user could also enter single quotes so that rules it out as well. I tried using escape unescape but I still have the same issue e.g. escape(""hello"") I could get the value in an unescaped format e.g. "hello" but I don't know what to do with it, escape doesn't work on it I end up with this %26%23034%3Bhello%26%23034%3B So I'm pretty much stuck at the moment as I can't do anything to the string, any ideas?

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• Break a string into parts, returning all characters

  - by Benjamin

  I want to break a string according to the following rules: all consecutive alpha-numeric chars, plus the dot (.) must be treated as one part all other consecutive chars must be treated as one part consecutive combinations of 1 and 2 must be treated as different parts no whitespace must be returned For example this string: Method(hierarchy.of.properties) = ? Should return this array: Array ( [0] => Method [1] => ( [2] => hierarchy.of.properties [3] => ) [4] => = [5] => ? ) I was unsuccessful with preg_split(), as AFAIK it cannot treat the pattern as an element to be returned. Any idea for a simple way to do this?

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• htaccess: how to prevent infinite subdirectories?

  - by Vincent Isles

  My .htaccess at the root directory contains this: Options -MultiViews +FollowSymlinks -Indexes ErrorDocument 404 /404.htm RewriteEngine On RewriteBase / followed by a bunch of RewriteRules. The .htaccess at the /forum subdirectory contains this: RewriteEngine On RewriteBase /forum RewriteRule ^index.html$ index.php [L,NE] RewriteRule ^(.*)-t-([0-9]+).html(.*)$ showthread.php?tid=$2$3 [QSA,L] RewriteRule ^(.*)-t-([0-9]+)-([0-9]+).html$ showthread.php?tid=$2&page=$3 [QSA,L] followed by other rules mapping SEO-friendly URLs to the true URLs. mydomain.com/forum/a-thread-t-1.html returns the page showthread.php?tid=1 but so does mydomain.com/forum/forum/a-thread-t-1.html, mydomain.com/forum/forum/forum/a-thread-t-1.html and so on. I don't want this behavior - I want pages accessed as /forum/forum/* to return a 404. Any hint on where I had been wrong?

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• How do I get the output of an Xcode user script to auto indent?

  - by John Gallagher

  The Problem I want to press a key when I have a line highlighted and convert from a single line: JGLogEntry *logEntry = [JGLogEntry applicationNoWindowsFrom:date1 to:date2 intoMOC:mockRawMOC]; to a multiline statement: JGLogEntry *logEntry = [JGLogEntry applicationNoWindowsFrom:date1 to:date2 intoMOC:mockRawMOC]; What I've Tried I've got a simple ruby script that almost gets me there. #!/usr/bin/env ruby s = STDIN.read s.gsub!(/(:.+?\w) (\w.+?)/,'\1' + "\n\t" +'\2') print s When I set the output to "Replace Selection", I get this: JGLogEntry *logEntry = [JGLogEntry applicationNoWindowsFrom:date1 to:date2 intoMOC:mockRawMOC]; When I set the output to "Place on Clipboard", then paste it in, I get the desired result: JGLogEntry *logEntry = [JGLogEntry applicationNoWindowsFrom:date1 to:date2 intoMOC:mockRawMOC]; However, this is two keypresses which is clumsy. Any ideas how I can get the replaced text to obey Xcode's auto indent rules?

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• Learning CSS - What is the BEST ONLINE RESOURCE?

  - by Chris Jacob

  The Goal: Use votes to rank nominated sites. The first answer to reach 100+ votes will be accepted. Please answer following these 5 simple rules: ONE SITE per answer. Link to each page if nominating a "series" of resources on a SITE. No "offline" books. Only online resources (tutorials, API references, blogs, screencasts, etc). Don't add "subjective" details/notes in your answer. Add them as a comment to the answer. Don't post duplicates. If your favourite is already listed Up Vote It! Example Answer: Site Name http://www.example.com Example Answer (site with a series of resources): Site Name http://www.example.com Series Name A http://www.example.com/video/a/1 http://www.example.com/video/a/2 Series Name B http://www.example.com/video/b/1

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• How do I set properties related to the calling method's scope?

  - by Thiado de Arruda

  I'm not looking for a way to associate values with a thread using the 'SetData' method. I need to store some kind of data that will only exist during the scope of a calling method, could be the immediate parent or any other call that is made down on the stack. For example: void SomeMethod() { string someInfo = "someInfo"; SomeOtherMethod(); object data = GetDataOnCurrentScope("someKey"); } void SomeOtherMethod() { SetDataOnParentScope("someKey", somevalue); } In this case both the 'someInfo' local variable and the data set with the "someKey" key will disapear after 'SomeMethod' returns. Is something like this possible? This may go against the rules of a stack, but who knows if someone has an idea...

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• Getting rid of index.php in the URL when using recess framework and lighttpd

  - by spudnik1979

  I am using the recess php framework with lighttpd Does anyone know how I can use the shorter urls of: http://www.myserver.com/recess Instead of: http://www.myserver.com/index.php/recess The recess readme file says that if I have mod_rewrite I can use the shorter url: -- "Do you have mod_rewrite? -- Yes: Open your browser to the location you unzipped -- No: Open your browser to the location you unzipped followed by index.php" I do have mod_rewrite enabled on lighttpd and i have removed the index.php but I get a 404. Do I need any special rules in my lighttpd.conf?

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• mod_rewrite and relative urls

  - by Davide Gualano

  I'm setting up some simple url rewriting rules using mod_rewrite and a .htacces file, but I've got some problems. If I set up the .htacces this way: Options +FollowSymLinks RewriteEngine On RewriteBase / RewriteRule /index.html /index.php [L] when I call from the browser this url: http://localhost/~dave/mySite/index.html I got a 404 error. Using this .htacces instead Options +FollowSymLinks RewriteEngine On RewriteBase / RewriteRule /index.html http://localhost/~dave/mySite/index.php [L] everything works fine and I get the index.php page I'm expecting. Am I forced to user absolute urls as the target of a rewrite? Is this a Apache configuration problem? I'm using Max OS X 10.6.2 with its standard Apache installation.

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• Why doesn't jquery validation plugin's remote attribute work for me?

  - by Pandiya Chendur

  I use jquery validation plugin and the remote attribute works with emailId but not with mobileNo? var validator = $("#addform").validate({ rules: { Name: "required", MobileNo: { required: true, minlength: 10, remote: '<%=Url.Action("getClientMobNo", "Clients") %>' }, Address: "required" }, messages: { Name: "please provide a client name", MobileNo: { required: "Please provide a mobile phone no", rangelength: jQuery.format("Enter at least {0} characters"), remote: jQuery.format("This MobileNo is already in use") }, Address: "please provide client address" }, A null value is passed to my controller action.. Any suggestion... public JsonResult getClientMobNo(string mobno) { JsonResult result = new JsonResult(); string status = clirep.getClientMobNo(Convert.ToInt64(mobno)); if (status == "Mobile No already exists") { result.Data = false; } else { result.Data = true; } return result; }

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• Creating TCP network errors for unit testing

  - by Robert S. Barnes

  I'd like to create various network errors during testing. I'm using the Berkely sockets API directly in C++ on Linux. I'm running a mock server in another thread from within Boost.Test which listens on localhost. For instance, I'd like to create a timeout during connect. So far I've tried not calling accept in my mock server and setting the backlog to 1, then making multiple connections, but all seem to successfully connect. I would think that if there wasn't room in the backlog queue I would at least get a connection refused error if not a timeout. I'd like to do this all programatically if possible, but I'd consider using something external like IPchains to intentionally drop certain packets to certain ports during testing, but I'd need to automate creating and removing rules so I could do it from within my Boost.Test unit tests. I suppose I could mock the various system calls involved, but I'd rather go through a real TCP stack if possible. Ideas?

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• multiple box-shadows not rendering

  - by sico87

  I am trying to give a text input a drop-shadow & a inner shadow, using CSS3 and box-shadow, you can see my code here, .text { width:388px; line-height:37px; height:37px; box-shadow:inset 0px 4px 4px rgba(193, 209, 230, 0.58), 0px 2px 2px, rgba(255, 255, 255, 0.75); border-radius:10px; background:#cdd6e6; border:0 none; } ? ? http://jsfiddle.net/3CBrm/ However my box-shadow rules are just being ignored, what am I doing wrong?

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• Does MySQL allow two primary keys on one table?

  - by Bharanikumar

  CREATE TABLE Orders -> ( -> ID SMALLINT UNSIGNED NOT NULL, -> ModelID SMALLINT UNSIGNED NOT NULL, -> Descrip VARCHAR(40), -> PRIMARY KEY (ID, ModelID) -> ); Basically, this appears to me to be creating two primary key on one table. Is that correct? I thought that we could create a number of unique keys in one table, but only one primary key. How is it that my system is allowing the creation of multiple primary keys? Please advise: what are the rules governing this?

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• improve my jquery validation plugin code

  - by Jared

  Hi All Just hoping soemone can help me to write better code than I can come up with on my own. I am using the jquery validation plugin. I have some fields that are mandatory ONLY if certain options are chosen. The below code works fine. But the thing is, is that that my list of 'OR's is much longer than I've put here. and it needs to be applied not just to 'directorsName' but a whole long list of inputs, selects etc. My question is.. how can I wrap up the code contained inside the RETURN? (so I dont have to keep repeating my 'OR's. I'm guessign I need a function but I'm unsure of the syntax) $("#myForm").validate({ rules: { directorsName : { required: function(element) { return ( $('#account_for').val() == "Joint" || $('#directors_number').val() == "2" || $('#directors_number').val() == "3" ); } } } }); Thanks in advance

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• When to rewrite vs. upgrade?

  - by MrGumbe

  All custom legacy software needs changing, or so say our users. Sometimes they want a feature or two added and all that is necessary to change a bit of code, add a control, or some other minor upgrade task. Sometimes they want to ditch their error-prone VB5 desktop solution and rewrite the whole thing as a rich Web 2.0 ASP.NET MVC application. More often, however, the scope of changes to legacy functionality lies somewhere between these two extremes. What rules of thumb to you use to decide whether you should upgrade an existing application or start from scratch?

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• Validating single form field with CodeIgniter

  - by iamdadude

  Is there a quick way to validate a single form field with CodeIgniter to see whether or not that field matches a set of rules? There's the $this-form_validation-run();, but that will return either TRUE or FALSE for the whole form, and that's just not what I'm looking for. For example, if I only wanted to check if the email was valid, checking the whole form is not going to get me the result I'm looking for. I looked through the documentation but couldn't find anything like $this-form_validation-run(); that accepts one parameter and returns TRUE or FALSE if it's valid.

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• Solving the problem of finding parts which work well with each other

  - by dotnetdev

  Hi, I have a database of items. They are for cars and similar parts (eg cam/pistons) work better than others in different combinations (eg one product will work well with another, while another combination of 2 parts may not). There are so many possible permutations, what solutions apply to this problem? So far, I feel that these are possible approaches (Where I have question marks, something tells me these are solutions but I am not 100% confident they are). Neural networks (?) Collection-based approach (selection of parts in a collection for cam, and likewise for pistons in another collection, all work well with each other) Business rules engine (?) What are good ways to tackle this sort of problem? Thanks

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• What is the most effective and flexible way to generate combinations in TSQL?

  - by SDReyes

  What is the most effective and flexible way to generate combinations in TSQL? With 'Flexible', I mean you should be able to add easily combination rules. e.g.: to generate combinatories of 'n' elements, sorting, remove duplicates, get combinatories where each prize belongs to a different lottery, etc. For example, Having a set of numbers representing lottery prizes. Number | Position | Lottery --------------------------- 12 | 01 | 67 12 | 02 | 67 34 | 03 | 67 43 | 01 | 89 72 | 02 | 89 33 | 03 | 89 (I include the position column because, a number could be repeated among different lottery's prizes) I would like to generate combinatories like: Numbers | Lotteries ------------------- 12 12 | 67 67 12 34 | 67 67 12 34 | 67 67 12 43 | 67 89 12 72 | 67 89 12 33 | 67 89 . . .

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• Global Exception Handlers in Java

  - by Samuh

  I am thinking of setting up a global, default Exception handler for my (Android) Mobile application(which uses Java syntax) using Thread.setDefaultUncaughtExceptionHandler(...) call. I am thinking of just displaying an Alert Dialog with appropriate message to the user. Are there any gotchas, caveats and rules that one needs to follow when setting DefaultExceptionHandlers? Any best practices like making sure that the process is killed, full stack trace is written to logs etc. ? Links to documentation, tutorials etc. that can throw some light on this are welcome. Thanks.

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• CSS problem on HTTPS pages (IE8 toolbar BHO)

  - by simil

  I am developing an IE8 toolbar in C#. The toolbar has a button which when clicked adds some user defined content to the page. I am using a BHO to add the required HTML, CSS & JS to the page. Things are fine with "http" pages. But, when a "https" page is loaded, user keeps getting the IE warning "Do you want to view only the webpage content that was delivered securely?....". I traced the problem to some css rules, where I am using local png files which are already installed on the user's machine. Is there any way by which I can access the png files on the local machine without getting the IE8 warning?

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• Cache images provided through script

  - by Wim Haanstra

  I have a script, which by using several querystring variables provides an image. I am also using URL rewriting within IIS 7.5. So images have an URL like this: http://mydomain/pictures/ajfhajkfhal/44/thumb.jpg or http://mydomain/pictures/ajfhajkfhal/44.jpg This is rewritten to: http://mydomain/Picture.aspx?group=ajfhajkfhal&id=44&thumb=thumb.jpg or http://mydomain/Picture.aspx?group=ajfhajkfhal&id=44 I added caching rules to IIS to cache JPG images when they are requested. This works with my images that are REAL images on the disk. When images are provided through the script, they are somehow always requested through the script, without being cached. The images do not change that often, so if the cache at least is being kept for 30 minutes (or until file change) that would be best. I am using .NET/C# 4.0 for my website. I tried setting several cache options in C#, but I cant seem to find how to cache these images (client-side), while my static images are cached properly.

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• How do I avoid nesting forms when offering inline editing of lists with checkboxes for mass updates.

  - by adam

  A lot of sites offer the ability to edit lists of items inline as well as allowing multiple items to be selected via checkboxes and have an action performed all at once e.g. delete, mark as spam etc. But how do you implement this without violating html rules. I need one form for the checkboxes with individual submit_tags for the mass actions. But after a user clicks on an item in the list, another form via Ajax will be inserted within the checkbox form. How do I avoid doing this? I'm using rails and jQuery.

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• Uploading a Website

  - by 01010011

  Hi, This is my first time building a website and using CodeIgniter for a school project. I was wondering whether you have any tips on uploading CI to a free web host , my database, free webhosting and basic security tips. Can I just upload the entire CI folder? Or do I have to upload individual files (God no!)? What are my options? What about my MySQL database - do I just upload my mysqldump to the webhost? Also, can you recommend a good free webhost. I was thinking about 000webhost. Any basic tips on security would also be appreciated (I've implemented many of the form_validation rules like xss_clean for starters) Any other suggestions will be more than welcome. Thanks!

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