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• DB2 CASE Statement

  - by gamerzfuse

  I need to somehow use the CASE syntax (which is beyond me) to affect the database results based on criteria. I have a bunch of royalties in 0.# form (royalty) I have a title ID # (title_id) and I need to show the new increase in royalties so that I can use the data. IF: they have a current royalty of 0.0 - 0.1 = 10% raise IF: they have 0.11 - 0.15 = 20% raise IF: royalty >= 0.16 = 20% raise Any help would be much appreciated. create table royalites ( title_id char(6), lorange integer, hirange integer, royalty decimal(5,2));

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• Why is this exception thrown when trying to match this regex in Java?

  - by Scott Ferguson

  I'm trying to match a specific string out of a an HTML document and have this regex pattern to grab it: Pattern somePattern = Pattern.compile("var json = ({\"r\":\"^d1\".*});"); However when I try to hit that code at runtime, I get this error: FATAL EXCEPTION: Timer-0 java.util.regex.PatternSyntaxException: Syntax error U_REGEX_RULE_SYNTAX near index 13: var json = ({"r":"^d1".*}); ^ at com.ibm.icu4jni.regex.NativeRegEx.open(Native Method) at java.util.regex.Pattern.compileImpl(Pattern.java:383) at java.util.regex.Pattern.<init>(Pattern.java:341) at java.util.regex.Pattern.compile(Pattern.java:317) Can anybody tell me what I'm doing wrong?

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• Dynamic scoping in Clojure?

  - by j-g-faustus

  Hi, I'm looking for an idiomatic way to get dynamically scoped variables in Clojure (or a similar effect) for use in templates and such. Here is an example problem using a lookup table to translate tag attributes from some non-HTML format to HTML, where the table needs access to a set of variables supplied from elsewhere: (def *attr-table* ; Key: [attr-key tag-name] or [boolean-function] ; Value: [attr-key attr-value] (empty array to ignore) ; Context: Variables "tagname", "akey", "aval" '( ; translate :LINK attribute in <a> to :href [:LINK "a"] [:href aval] ; translate :LINK attribute in <img> to :src [:LINK "img"] [:src aval] ; throw exception if :LINK attribute in any other tag [:LINK] (throw (RuntimeException. (str "No match for " tagname))) ; ... more rules ; ignore string keys, used for internal bookkeeping [(string? akey)] [] )) ; ignore I want to be able to evaluate the rules (left hand side) as well as the result (right hand side), and need some way to put the variables in scope at the location where the table is evaluated. I also want to keep the lookup and evaluation logic independent of any particular table or set of variables. I suppose there are similar issues involved in templates (for example for dynamic HTML), where you don't want to rewrite the template processing logic every time someone puts a new variable in a template. Here is one approach using global variables and bindings. I have included some logic for the table lookup: ;; Generic code, works with any table on the same format. (defn rule-match? [rule-val test-val] "true if a single rule matches a single argument value" (cond (not (coll? rule-val)) (= rule-val test-val) ; plain value (list? rule-val) (eval rule-val) ; function call :else false )) (defn rule-lookup [test-val rule-table] "looks up rule match for test-val. Returns result or nil." (loop [rules (partition 2 rule-table)] (when-not (empty? rules) (let [[select result] (first rules)] (if (every? #(boolean %) (map rule-match? select test-val)) (eval result) ; evaluate and return result (recur (rest rules)) ))))) ;; Code specific to *attr-table* (def tagname) ; need these globals for the binding in html-attr (def akey) (def aval) (defn html-attr [tagname h-attr] "converts to html attributes" (apply hash-map (flatten (map (fn [[k v :as kv]] (binding [tagname tagname akey k aval v] (or (rule-lookup [k tagname] *attr-table*) kv))) h-attr )))) (defn test-attr [] "test conversion" (prn "a" (html-attr "a" {:LINK "www.google.com" "internal" 42 :title "A link" })) (prn "img" (html-attr "img" {:LINK "logo.png" }))) user=> (test-attr) "a" {:href "www.google.com", :title "A link"} "img" {:src "logo.png"} This is nice in that the lookup logic is independent of the table, so it can be reused with other tables and different variables. (Plus of course that the general table approach is about a quarter of the size of the code I had when I did the translations "by hand" in a giant cond.) It is not so nice in that I need to declare every variable as a global for the binding to work. Here is another approach using a "semi-macro", a function with a syntax-quoted return value, that doesn't need globals: (defn attr-table [tagname akey aval] `( [:LINK "a"] [:href ~aval] [:LINK "img"] [:src ~aval] [:LINK] (throw (RuntimeException. (str "No match for " tagname))) ; ... more rules [(string? ~akey)] [] ))) Only a couple of changes are needed to the rest of the code: In rule-match?, when syntax-quoted the function call is no longer a list: - (list? rule-val) (eval rule-val) + (seq? rule-val) (eval rule-val) In html-attr: - (binding [tagname tagname akey k aval v] - (or (rule-lookup [k tagname] *attr-table*) kv))) + (or (rule-lookup [k tagname] (attr-table tagname k v)) kv))) And we get the same result without globals. (And without dynamic scoping.) Are there other alternatives to pass along sets of variable bindings declared elsewhere, without the globals required by Clojure's binding? Is there an idiomatic way of doing it, like Ruby's binding or Javascript's function.apply(context)?

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• Generic test suite for ASP.NET Membership/Role/Profile/Session Providers

  - by SztupY

  Hi! I've just created custom ASP.NET Membership, Role, Profile and Session State providers, and I was wondering whether there exists a test suite or something similar to test the implementation of the providers. I've checked some of the open source providers I could find (like the NauckIt.PostgreSQL provider), but neither of them contained unit tests, and all of the forum topics I've found mentioned only a few test cases (like checking whether creating a user works), but this is clearly not a complete test suite for a Membership provider. (And I couldn't find anything for the other three providers) Are there more or less complete test suites for the above mentioned providers, or are there custom providers out there that have at least some testing avaialable?

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• Prevent OCUnit tests from running when compilation fails

  - by mhenry1384

  I'm using Xcode 3.2.2 and the built in OCUnit test stuff. One problem I'm running into is that every time I do a build my unit tests are run, even if the build failed. Let's say I make a syntax error in one of my tests. The test fails to compile and the last successful compilation of the unit tests are run. The same thing happens if one of the dependent targets fail to build - the tests are still run. Which is obviously not what I want. How can I prevent the tests from running if the build fails? If this is not possible then I'd rather have the tests never run automatically, is that possible? Sorry if this is obvious, I'm an Xcode noob. Should I be using a better unit testing framework?

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• Would watching a file for changes or redundantly querying that file be more efficient?

  - by badpanda

  I am wondering whether watching a file/directory for changes using the FileSystemWatcher class is extremely memory intensive. I am developing a desktop application in C# that will be running behind the scenes continuously on low-performance computers, and I need some way of checking to see if various files have changed. I can think of a few solutions: Watch the directories using FileSystemWatcher. Run a timed thread on an interval that goes through and manually checks this. Check manually every time the actionhandler thread runs (the program will occasionally do something, on an action). Any suggestions? Thanks! badPanda

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• MySQL: updating a row and deleting the original in case it becomes a duplicate

  - by Silvio Donnini

  I have a simple table made up of two columns: col_A and col_B. The primary key is defined over both. I need to update some rows and assign to col_A values that may generate duplicates, for example: UPDATE `table` SET `col_A` = 66 WHERE `col_B` = 70 This statement sometimes yields a duplicate key error. I don't want to simply ignore the error with UPDATE IGNORE, because then the rows that generate the error would remain unchanged. Instead, I want them to be deleted when they would conflict with another row after they have been updated I'd like to write something like: UPDATE `table` SET `col_A` = 66 WHERE `col_B` = 70 ON DUPLICATE KEY REPLACE which unfortunately isn't legal in SQL, so I need help finding another way around. Also, I'm using PHP and could consider a hybrid solution (i.e. part query part php code), but keep in mind that I have to perform this updating operation many millions of times. thanks for your attention, Silvio Reminder: UPDATE's syntax has problems with joins with the same table that is being updated

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• Determine compile options from load module - IBM Enterprise COBOL

  - by NealB

  How can I determine the compile options used to compile an IBM Enterprise COBOL program by looking at the load module? When a dump is issued they are listed as follows: Compile Options for PROGXX: ADV, ARITH(COMPAT), AWO, NOCICS, CODEPAGE(01140), DATA(31), NODATEPROC, NODBCS, NODLL, NODYNAM, NOEXPORTALL, NOFASTSRT, INTDATE(LILIAN), NUMPROC(NOPFD), NOOPTIMIZE, OUTDD(SYSOUT), PGMNAME(COMPAT), RENT, RMODE(AN NOSQL, SQLCCSID, SSRANGE, NOTEST, NOTHREAD, TRUNC(OPT), XMLPARSE(XMLSS), YEARWINDOW(1900), ZWB so I presume they must be tucked away somewhere in the load module. I want to scan a load library checking that each load was compiled with some specific options to ensure compliance to shop standard (eg. SSRANGE). Any ideas would be appreciated.

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• PEP8: conflict between W292 and W391

  - by seler

  As far as I know in unix it's a good practice to always have blank line at the end of file - or to put it in other words: every line should end with \n. While checking my python code with PEP8 I noticed that it also states that there should be \n at end of file: W292 no newline at end of file JCR: The last line should have a newline. What's strange, it conflicts with W391: W391 blank line at end of file JCR: Trailing blank lines are superfluous. Okay: spam(1) W391: spam(1)\n How it should be? Should I have blank line at the end of file or not?

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• MySQL SELECT, store in a variable

  - by rlb.usa

  For a stored procedure, I want to do a SELECT, and store a column's value into a variable. How do I do this? I want to do something like this: DECLARE countTemp INT; SET countTemp=(SELECT COUNT(Name) FROM mytable WHERE Name= var_name LIMIT 0,1); OR, like this : DECLARE countTemp INT; SELECT countTemp=ColumnXYZ FROM mytable WHERE Name= var_name LIMIT 0,1; But, I tried these and MySQL says my syntax is incorrect; how do I do something like this?

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• Populating <validuser/> field in WorkItem

  - by armannvg

  Hi I've created a new WorkItem named Project that contains a field named business owner which can be any domain user. The field was created using the WorkItem XML syntax using the tag. I have a problem that only TFS valid users (as the name suggests :)) show up the the combobox in the Visual Studio form. Is there any way for me to let that box contain all domain users without having to give all users some tfs read access ? If not then what is the minimum access that I can apply in TFS that I can give to all domain users ? Or is there some other way that I can't notice ?

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• Is there Java counterpart for Aspnet 4's <%: %> XSS prevention?

  - by Tomas Tintera

  I'm developer moving from C# to Java. Heard about new ASP net feature. <%: %. It renders object with html encoding. Only these impolementing IHtmlString interface are not encoded (to prevent double encoding). See more in http://weblogs.asp.net/scottgu/archive/2010/04/06/new-lt-gt-syntax-for-html-encoding-output-in-asp-net-4-and-asp-net-mvc-2.aspx Is such cute tool in Java side? I mean a way to output a string to webpage and (not)encode it based on it's type.

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• Linq query with subquery as comma-separated values

  - by Keith

  In my application, a company can have many employees and each employee may have have multiple email addresses. The database schema relates the tables like this: Company - CompanyEmployeeXref - Employee - EmployeeAddressXref - Email I am using Entity Framework and I want to create a LINQ query that returns the name of the company and a comma-separated list of it's employee's email addresses. Here is the query I am attempting: from c in Company join ex in CompanyEmployeeXref on c.Id equals ex.CompanyId join e in Employee on ex.EmployeeId equals e.Id join ax in EmployeeAddressXref on e.Id equals ax.EmployeeId join a in Address on ax.AddressId equals a.Id select new { c.Name, a.Email.Aggregate(x=x + ",") } Desired Output: "Company1", "[email protected],[email protected],[email protected]" "Company2", "[email protected],[email protected],[email protected]" ... I know this code is wrong, I think I'm missing a group by, but it illustrates the point. I'm not sure of the syntax. Is this even possible? Thanks for any help.

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• Unchecked call to compareTo

  - by Dave Jarvis

  Background Create a Map that can be sorted by value. Problem The code executes as expected, but does not compile cleanly: http://pastebin.com/bWhbHQmT The syntax for passing Comparable as a generic parameter along to the Map.Entry<K, V> (where V must be Comparable?) -- so that the (Comparable) typecast shown in the warning can be dropped -- eludes me. Warning Compiler's cantankerous complaint: SortableValueMap.java:24: warning: [unchecked] unchecked call to compareTo(T) as a member of the raw type java.lang.Comparable return ((Comparable)entry1.getValue()).compareTo( entry2.getValue() ); Question How can the code be changed to compile without any warnings (without suppressing them while compiling with -Xlint:unchecked)? Related TreeMap sort by value How to sort a Map on the values in Java? http://paaloliver.wordpress.com/2006/01/24/sorting-maps-in-java/ Thank you!

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• Looking for a method to replace a string with a hyperlink

  - by Richard West

  I have a usercontrol in an asp web forms application that I am working on in C#. I am binding to a repeater and outputting a field of information, named "Text", using the following syntax: <%# DataBinder.Eval(Container.DataItem, "Text") %> I am looking for a method that will allow my to search for a keyword within the string that is returned from above, and replace that string with a hyperlink such as <a href="www.anysite.com/keyword">keyword</a>. I'm not very familer with user controls and getting data back in this manner so I am looking for advice on how this might be best handled. Thanks!

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• Check if table exists in c#

  - by apoorv020

  I want to read data from a table whose name is supplied by a user. So before actually starting to read data, I want to check if the database exists or not. I have seen several pieces of code on the NET which claim to do this. However, they all seem to be work only for SQL server, or for mysql, or some other implementation. Is there not a generic way to do this? (I am already seperately checking if I can connect to the supplied database, so I'm fairly certain that a connection can be opened to the database.)

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• Ruby: Add a method to the class of an input parameter

  - by TJB

  I'm just exploring ruby and was wondering about the theoretical possibility of adding a method to the class of an object. For example, define a method that takes in a parameter and would add a method to the class of that parameter (not just to the parameter object itself). Something like this example: class SomeClass end class AnotherClass end alpha = SomeClass.new beta = AnotherClass.new def AddHelloMethodTo param # This is where I'm trying to # add a method to the class of the parameter def param.class.Hello "Hello" end end AddHelloMethodTo alpha AddHelloMethodTo beta gamma = AnotherClass.new alpha.Hello beta.Hello gamma.Hello (Excuse me if I have syntax errors / typos I'm REALLY new to this!) Notice how I don't call the AddHelloMethodTo on gamma but I expect Hello to be defined because I added it to the class. Is this possible?

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• Build Systems for PHP Web Apps

  - by macinjosh

  I want to start automating more of my web development process so I'm looking for a build system. I write mostly PHP apps on Mac OS X and deploy Linux servers over FTP. A lot of my clients have basic hosting providers so shell access to their servers is typically not available, however remote MySQL access is usually present. Here is what I want to do with a build system: When Building: Lint JavaScript Files Validate CSS Files Validate HTML Files Minify and concatenate JS and CSS files Verify PHP Syntax Set Debug/Production flags When Deploying Checkout latest version from SVN Run build process Upload files to server via FTP Run SQL scripts on remote DB I realize this is a lot of work to automate but I think it would be worth it. So what is the best way to start down this path? Is there a system that can handle builds and deploys, or should I search for separate solutions? What systems would you recommend?

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• How can I display locally stored images on an internet website?

  - by ropstah

  Hi, i would like to display images on my website that are stored on a visitors local filesystem. Assuming I have the location of the image on the visitors drive (e.g. c:\Documents And Settings\Ropstah\image.png), is it then possible for me to display this image in my internet website (e.g. www.website.com)? The images won't seem to load when i use the following syntax (Internet Explorer 7, Firefox 3 etc..): <img src="file://c:\Documents and Settings\Ropstah\image.png" /> The images DO display if the .html file (which i use on website.com/index.html) is located on my local pc...

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• Checkstyle for C#?

  - by PSU_Kardi

  I'm looking to find something along the lines of Checkstyle for Visual Studio. I've recently started a new gig doing .NET work and realized that coding standards here are a bit lacking. While I'm still a young guy and far from the most experienced developer I'm trying to lead by example and get things going in the right direction. I loved the ability to use Checkstyle with Eclipse and examine code before reviews so I'd like to do the same thing with Visual Studio. Anyone have any good suggestions? Another thing I'd be somewhat interested in is a plug-in for SVN that disallows check-in until the main coding standards are met. I do not want people checking in busted code that's going to wind up in a code review. Any suggestions at this point would be great.

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• Django - transactions in the model?

  - by orokusaki

  Models (disregard typos / minor syntax issues. It's just pseudo-code): class SecretModel(models.Model): some_unique_field = models.CharField(max_length=25, unique=True) # Notice this is unique. class MyModel(models.Model): secret_model = models.OneToOneField(SecretModel, editable=False) # Not in the form spam = models.CharField(max_length=15) foo = models.IntegerField() def clean(self): SecretModel.objects.create(some_unique_field=self.spam) Now if I go do this: MyModel.objects.create(spam='john', foo='OOPS') # Obviously foo won't take "OOPS" as it's an IntegerField. #.... ERROR HERE MyModel.objects.create(spam='john', foo=5) # So I try again here. #... IntegrityError because SecretModel with some_unique_field = 'john' already exists. I understand that I could put this into a view with a request transaction around it, but I want this to work in the Admin, and via an API, etc. Not just with forms, or views. How is it possible?

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• Python: does it make sense to refactor this check into it's own method?

  - by Jeff Fry

  I'm still learning python. I just wrote this method to determine if a player has won a game of tic-tac-toe yet, given a board state like:'[['o','x','x'],['x','o','-'],['x','o','o']]' def hasWon(board): players = ['x', 'o'] for player in players: for row in board: if row.count(player) == 3: return player top, mid, low = board for i in range(3): if [ top[i],mid[i],low[i] ].count(player) == 3: return player if [top[0],mid[1],low[2]].count(player) == 3: return player if [top[2],mid[1],low[0]].count(player) == 3: return player return None It occurred to me that I check lists of 3 chars several times and could refactor the checking to its own method like so: def check(list, player): if list.count(player) == 3: return player ...but then realized that all that really does is change lines like: if [ top[i],mid[i],low[i] ].count(player) == 3: return player to: if check( [top[i],mid[i],low[i]], player ): return player ...which frankly doesn't seem like much of an improvement. Do you see a better way to refactor this? Or in general a more Pythonic option? I'd love to hear it!

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• Redirect PHP-Shell-Script output

  - by Corelgott

  Hi Folks, i have got a php-script foo.php #!/usr/bin/php -c /etc/php5/cli/php.ini -q <?php echo 'hello'; // & do some stuff ?> I call this script not wrapped by a sh-script but using it directly in a cron job. To get rid of it's output i normally would just create a sh-file which calls /usr/bin/php -c /etc/php5/cli/php.ini -q foo.php > /dev/null 2 > /dev/null now i'd like to do this in the interpreter-declaration of the php file it self... so i am looking for the syntax for: #!/usr/bin/php -args [file's content] > /redirect 2 > /redirect i have kind of a hard time googleing for it... so if anybody could point me into the right direction i would really appreciate it! Thx in advance Corelgott

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• What is the difference between File and FileInfo in C# ?

  - by Lilitu88

  I've been reading that the static methods of the File Class are better used to perform small and few tasks on a file like checking to see if it exists and that we should use an instance of the FileInfo Class if we are going to perform many operations on a specific file. I understand this and can simply use it that way blindly but I would like to know why is there a difference ? What is it about the way they work that make them suitable for different situations ? What is the point of having this 2 different classes that seem do the same in different ways ? It would be helpful if someone could answer at least one of this questions.

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• Getting "Illegal Seek" error after calling accept()

  - by Bilthon

  Well.. it's pretty much that, I seem to be getting a "Illegal Seek" error when checking my errno variable. The problem is that I have no idea of what that can mean. I know sockets are treated like files in unix, but I can't see how can this be related to sockets. What I'm doing exactly is: int sck = ::accept(m_socket, (struct sockaddr*)&client_address, (socklen_t*)&address_len); Then I get sck = -1 and errno = ESPIPE And the weird thing is that it happens randomly. I mean, sometimes the code works fine, and sometimes it just thows an exception. I'm working with threads so that's understandable. But I just would like to know what kind of behaviour makes the accept() call to set errno as ESPIPE so I could check the paramethers for instance. Thanks Nelson R. Pérez

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