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  • Writing JSON with XSLT

    - by JP
    Hi, I'm trying to write XSLT to transform a specific web page to JSON. The following code demonstrates how Ruby would do this conversion, but the XSLT doesn't generate valid JSON (there's one too many commas inside the array) - anyone know how to write XSLT to generate valid JSON? require 'rubygems' require 'nokogiri' require 'open-uri' doc = Nokogiri::HTML(open('http://bbc.co.uk/radio1/playlist')) xslt = Nokogiri::XSLT(DATA.read) puts out = xslt.transform(doc) # Now follows the XSLT __END__ <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns="http://www.w3.org/1999/xhtml"> <xsl:output method="text" encoding="UTF-8" media-type="text/plain"/> <xsl:template match="/"> [ <xsl:for-each select="//*[@id='playlist_a']//div[@class='artists_and_songs']//ul[@class='clearme']"> {'artist':'<xsl:value-of select="li[@class='artist']" />','track':'<xsl:value-of select="li[@class='song']" />'}, </xsl:for-each> ] </xsl:template> </xsl:stylesheet>

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  • How to store a numeric value which can have other statuses in a database?

    - by Jiho Han
    I need to store a set of numbers in a database which are imported from a spreadsheet. Sometimes a number is just a number. But in other times, a value can be "missing", "N/A", or blank and these all represent different things. What would be a good approach to store these numbers in the database? Originally I only had to account for N/A. So I made it -1 as I imported them (this only works if the number can never be negative obviously). I could use other negative numbers for other statuses. However, that seems clunky to me. Should I store the numbers as string then apply conversion at use time? Should I create a matching table that stores different statuses of each value?

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  • Scheme Infix to Postfix

    - by Cody
    Let me establish that this is part of a class assignment, so I'm definitely not looking for a complete code answer. Essentially we need to write a converter in Scheme that takes a list representing a mathematical equation in infix format and then output a list with the equation in postfix format. We've been provided with the algorithm to do so, simple enough. The issue is that there is a restriction against using any of the available imperative language features. I can't figure out how to do this in a purely functional manner. This is our fist introduction to functional programming in my program. I know I'm going to be using recursion to iterate over the list of items in the infix expression like such. (define (itp ifExpr) ( ; do some processing using cond statement (itp (cdr ifExpr)) )) I have all of the processing implemented (at least as best I can without knowing how to do the rest) but the algorithm I'm using to implement this requires that operators be pushed onto a stack and used later. My question is how do I implement a stack in this function that is available to all of the recursive calls as well?

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  • QPluginLoader with PyQt modules as plugins: possible?

    - by Thorfin
    Hi! I have a C++ application that loads externals plugins thanks to QPluginloader. QPluginLoader provides access to a Qt plugin. A Qt plugin is stored in a shared library (a DLL). The plugins have to inherit from a pure virtual class ( and Q_DECLARE_INTERFACE ) and QObject. I would like to create plugins by using python and PyQt. Is this possible without too much work? For instance if I have to convert the modules to C++ with boost::python, this could be nonsense, as PyQt is already a conversion from C++ to Python... Thanks!

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  • Java Charset problem on linux

    - by scot
    Hi, problem: I have a string containing special characters which i convert to bytes and vice versa..the conversion works properly on windows but on linux the special character is not converted properly.the default charset on linux is UTF-8 as seen with Charset.defaultCharset.getdisplayName() however if i run on linux with option -Dfile.encoding=ISO-8859-1 it works properly.. how to make it work using the UTF-8 default charset and not setting the -D option in unix environment. edit: i use jdk1.6.13 edit:code snippet works with cs = "ISO-8859-1"; or cs="UTF-8"; on win but not in linux String x = "½"; System.out.println(x); byte[] ba = x.getBytes(Charset.forName(cs)); for (byte b : ba) { System.out.println(b); } String y = new String(ba, Charset.forName(cs)); System.out.println(y); ~regards daed

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  • how to get cartesian products between database and local sequences in linq?

    - by JD
    I saw this similar question here but can't figure out how to use Contains in Cartesian product desired result situation: http://stackoverflow.com/questions/1712105/linq-to-sql-exception-local-sequence-cannot-be-used-in-linq-to-sql-implementatio Let's say I have following: var a = new [] { 1, 4, 7 }; var b = new [] { 2, 5, 8 }; var test = from i in a from j in b select new { A = i, B = j, AB = string.Format("{0:00}a{1:00}b", i, j), }; foreach (var t in test) Console.Write("{0}, ", t.AB); This works great and I get a dump like so (note, I want the cartesian product): 01a02b, 01a05b, 01a08b, 04a02b, 04a05b, 04a08b, 07a02b, 07a05b, 07a08b, Now what I really want is to take this and cartesian product it again against an ID from a database table I have. But, as soon as I add in one more from clause that instead of referencing objects, references SQL table, I get an error. So, altering above to something like so where db is defined as a new DataContext (i.e., class deriving from System.Data.Linq.DataContext): var a = new [] { 1, 4, 7 }; var b = new [] { 2, 5, 8 }; var test = from symbol in db.Symbols from i in a from j in b select new { A = i, B = j, AB = string.Format("{0}{1:00}a{2:00}b", symbol.ID, i, j), }; foreach (var t in test) Console.Write("{0}, ", t.AB); The error I get is following: Local sequence cannot be used in LINQ to SQL implementations of query operators except the Contains operator Its related to not using Contains apparently but I'm unsure how Contains would be used when I don't really want to constrict the results - I want the Cartesian product for my situation. Any ideas of how to use Contains above and still yield the Cartesian product when joining database and local sequences?

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  • How to scrape Google SERP based on copyright year?

    - by Michael Mao
    Hi all: I know there must be ways to do this sort of things. I am not pro in RoR or Python, not even an expert in PHP. So my solution tends to be quite dumb: It uses a FireFox add-on called imarcos to scrape the target urls from Google SERP, and use PHP to store info into the database. At the very core of my workaround there lies a problem: How to specifically find target urls based on their copyright year? I mean, something like "copyright 1998-2006" in the footer is to be considered a target, but my search results are not 100% accurate. I used the following url to search : http://www.google.com.au/#hl=en&q=inurl:.com.au+intext:copyright+1995..2007+--2008+--2009&start=0&cad=b&fp=6a8119b094529f00 It reads : search for pages that have .com.au in URL and a copyright range from 1995 to 2007 exclude the year of 2008 or 2009. Starting position is 0, of course the offset can be changed. I've already done a dummy list and honestly I am not pleased with the result. That's mostly because I cannot find a way to restrict search terms in the exact order as they are entered into the search url. copyright can appear in anywhere on page and doesn't necessarily before the years, that's the current story. Is there a more clear way to sort out this? Oh, almost forgot to say the client doesn't wanna spent too much in this - I cannot persuade him simply buy some cool software, unfortunately. I hope there is a way to use clever Google search operators or similar things to go around this issue. Many thanks in advance!

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  • BigDecimal serialization in GWT

    - by Domchi
    What is your preferred approach to serializing BigDecimal in GWT? Are there any clever workarounds, or do you simply use Double or String? Of all of the GWT pains this is so far the biggest; I'd hate to create two models, one for server and one for GWT, and transform data from one to the other. On the other hand, while I don't care much about using String instead of, say, javax.xml.datatype.Duration, I have to use BigDecimal on the server because of the calculations, which means either two models and conversion, or tons of tiny conversions to BigDecimal for every calculation.

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  • How do you convert date taken from a bash script to milliseconds in a Java program?

    - by Matt Pascoe
    I am writing a piece of code in Java that needs to take a time sent from a bash script and parse the time to milliseconds. When I check the millisecond conversion on the date everything is correct except for the month I have sent which is January instead of March. Here is the variable I create in the bash script, which later in the script I pass to the Java program: TIME=`date +%m%d%Y_%H:%M:%S` Here is the Java code which parses the time to milliseconds: String dt = "${scriptstart}"; java.text.SimpleDateFormat scriptStart = new java.text.SimpleDateFormat("MMDDyyyy_HH:mm:ss"); long start = scriptStart.parse(dt).getTime(); The goal of this statement is to find the elapsed time between the start of the script and the current system time. To troubleshoot this I printed out the two: System Time = 1269898069496 (converted = Mon Mar 29 2010 16:27:49 GMT-0500 (Central Daylight Time)) Script Start = 03292010_16:27:45 Script Start in Milli = 1264804065000 (Converted = Fri Jan 29 2010 16:27:45 GMT-0600 (Central Standard Time))

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  • How does Linq-to-Xml convert objects to strings?

    - by Eamon Nerbonne
    Linq-to-Xml contains lots of methods that allow you to add arbitrary objects to an xml tree. These objects are converted to strings by some means, but I can't seem to find the specification of how this occurs. The conversion I'm referring to is mentioned (but not specified) in MSDN. I happen to need this for javascript interop, but that doesn't much matter to the question. Linq to Xml isn't just calling .ToString(). Firstly, it'll accept null elements, and secondly, it's doing things no .ToString() implementation does: For example: new XElement("elem",true).ToString() == "<elem>true</elem>" //but... true.ToString() == "True" //IIRC, this is culture invariant, but in any case... true.ToString(CultureInfo.InvariantCulture) == "True" Other basic data types are similarly specially treated. So, does anybody know what it's doing and where that's described?

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  • How to launch the market intent in 'Give Feedback' mode on android.

    - by Paul Maidment
    Hi There, I have just written a game for the Android market and would like to remind my customers to leave feeback on the market for the application (especially the demo version.) Is there any way to launch the market intent in a mode that will take the user to the feedback / comments section of the page? I already use this approach for linking my demo to the paid app... Intent goToMarket = null; goToMarket = new Intent(Intent.ACTION_VIEW,Uri.parse("market://details?id=com.paulmaidment.games.flagsoftheworld")); startActivity(goToMarket); Is there a best practice that any Android devs out there might know of? Additionally, is there any way to track referalls from my demo app so that I can try to calculate some kind of a conversion rate? (i.e. how effective the demo app is at generating sales.) Thanks, Paul

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  • Asp.Net 1 -> Asp.Net 2 upgrade - Machine.Config - unrecognized parameter

    - by Chris
    Hi All, I am working on upgrading a web app to asp.net 2 from 1. VS 2008 did its conversion things, and everything is building successfully and has been converted to a web application via the appropriate menu item in VS 2008. On launching the site using the Asp.net development server I am receiving a configuration error on the appsettings line in the machine config of Unrecognized attribute 'restartOnExternalChanges'. The app targets asp.net 2 in the projects properties in VS, and the error page indicates similar : Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053 The error message seems to indicate I am trying to run this in an asp.net 1 environment, but surely that isnt the case, and if so how do I rectify this. Any help would be appreciated Thanks,

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  • What ever happened to APL?

    - by lkessler
    When I was at University 30 years ago, I used a programming language called APL. I believe the acronym stood for "A Programming Language", This language was interpretive and was especially useful for array and matrix operations with powerful operators and library functions to help with that. Did you use APL? Is this language still in use anywhere? Is it still available, either commercially or open source? I remember the combinatorics assignment we had. It was complex. It took a week of work for people to program it in PL/1 and those programs ranged from 500 to 1000 lines long. I wrote it in APL in under an hour. I left it at 10 lines for readability, although I should have been a purist and worked another hour to get it into 1 line. The PL/1 programs took 1 or 2 minutes to run on the IBM mainframe and solve the problem. The computer charge was $20. My APL program took 2 hours to run and the charge was $1,500 which was paid for by our Computer Science Department's budget. That's when I realized that a week of my time is worth way more than saving some $'s in someone else's budget. I got an A+ in the course. p.s. Don't miss this presentation entitled: "APL one of the greatest programming languages ever"

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  • Rails timezone differences between Time and DateTime

    - by kjs3
    I have the timezone set. config.time_zone = 'Mountain Time (US & Canada)' Creating a Christmas event from the console... c = Event.new(:title = "Christmas") using Time: c.start = Time.new(2012,12,25) = 2012-12-25 00:00:00 -0700 #has correct offset c.end = Time.new(2012,12,25).end_of_day = 2012-12-25 23:59:59 -0700 #same deal using DateTime: c.start = DateTime.new(2012,12,25) = Tue, 25 Dec 2012 00:00:00 +0000 # no offset c.end = DateTime.new(2012,12,25).end_of_day = Tue, 25 Dec 2012 23:59:59 +0000 # same I've carelessly been using DateTime thinking that input was assumed to be in the config.time_zone but there's no conversion when this gets saved to the db. It's stored just the same as the return values (formatted for the db). Using Time is really no big deal but do I need to manually offset anytime I'm using DateTime and want it to be in the correct zone?

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  • Unbox an Object to Its Type

    - by Ngu Soon Hui
    Hello, is there anyway to unbox an object to its real type? Basically I am given an ArrayList, the array list are actually a list of int or double, or maybe other types ( it can be either, but it is either all int or double, no mix). Now, I will have to return a List<double> or List<int> or other list, depending on what is the real type. public List<T> ConvertToList<T>(ArrayList arr) { var list1 = new List<T>(); foreach(var obj in arr) { // how to do the conversion? var objT = ?? list1.Add(objT); } return list1; } Any idea?

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  • How to return variable datatypes from a method

    - by Praesagus
    I have a method whose callers require different datatypes. I could repeat the requisite conversions a dozen times by putting them in each of the callers, but it seems much more efficient to do it once in the called method. public String myMethod(String myArg) { return DoSomething(myArg); } public Int32 myMethod(String myArg) { return Convert.ToInt32(DoSomething(myArg)); } private String DoSomething(key) { return SomeList[key]; } If I have multiple methods that pull data from SomeList and have to utilize different data types then in each I have to do a type conversion. Examples might be session variables or query or form requests or any other number of things. In VB I could say Function myMethod(myArg as String) as Variant myMethod=DoSomething(myArg) End Function Sorry if the original post was not very clear. I hope this makes more sense. Thanks

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  • Specification Pattern and Boolean Operator Precedence

    - by Anders Nielsen
    In our project, we have implemented the Specification Pattern with boolean operators (see DDD p 274), like so: public abstract class Rule { public Rule and(Rule rule) { return new AndRule(this, rule); } public Rule or(Rule rule) { return new OrRule(this, rule); } public Rule not() { return new NotRule(this); } public abstract boolean isSatisfied(T obj); } class AndRule extends Rule { private Rule one; private Rule two; AndRule(Rule one, Rule two) { this.one = one; this.two = two; } public boolean isSatisfied(T obj) { return one.isSatisfied(obj) && two.isSatisfied(obj); } } class OrRule extends Rule { private Rule one; private Rule two; OrRule(Rule one, Rule two) { this.one = one; this.two = two; } public boolean isSatisfied(T obj) { return one.isSatisfied(obj) || two.isSatisfied(obj); } } class NotRule extends Rule { private Rule rule; NotRule(Rule obj) { this.rule = obj; } public boolean isSatisfied(T obj) { return !rule.isSatisfied(obj); } } Which permits a nice expressiveness of the rules using method-chaining, but it doesn't support the standard operator precedence rules of which can lead to subtle errors. The following rules are not equivalent: Rule<Car> isNiceCar = isRed.and(isConvertible).or(isFerrari); Rule<Car> isNiceCar2 = isFerrari.or(isRed).and(isConvertible); The rule isNiceCar2 is not satisfied if the car is not a convertible, which can be confusing since if they were booleans isRed && isConvertible || isFerrari would be equivalent to isFerrari || isRed && isConvertible I realize that they would be equivalent if we rewrote isNiceCar2 to be isFerrari.or(isRed.and(isConvertible)), but both are syntactically correct. The best solution we can come up with, is to outlaw the method-chaining, and use constructors instead: OR(isFerrari, AND(isConvertible, isRed)) Does anyone have a better suggestion?

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  • How do I create email addresses for DotNetNuke users using my domain ([email protected]

    - by rwain
    My client wants to create email addresses for all their dotnetnuke users using their domain. The point is to keep the user's email addresses 'private' while still allowing communication through a public email address that they can control. It's not necessary to have a full webmail interface (although that would be nice). I'm thinking it would be enough just to forward any mail on and just act as a gateway. So if an email was sent to [email protected], it would be forwarded on to the email address associated with the dotnetnuke account with username 'rwain'. Is this possible to do in a shared hosting environment? Or do I need to create some custom mail server that does a conversion of the email address and forwards it?

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  • Including non-standard C headers in C++

    - by Swaroop S
    I needed to include a few c headers ( non standard header files ) in my C++ code to be compiled by gcc. The C header (foo.h) has support for : #ifdef __cplusplus extern "C" { #endif and similarly at the end for }. The c++ code has the include "foo.h" I believe I should be able to just include the header (foo.h) and create instances of structs defined in the .h file. I am not able to compile the source code. It seems like the compiler looks at the c code as if it were c++ code. I see error such as error: expected constructor, destructor or type conversion before "(" Did I do something wrong ? I took advise from : http://www.parashift.com/c++-faq-lite/mixing-c-and-cpp.html What else do i need to do, to tell the c++ compiler "expect and compile as c code" ?

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  • What Language Feature Can You Just Not Live Without?

    - by akdom
    I always miss python's built-in doc strings when working in other languages. I know this may seem odd, but it allows me to cut down significantly on excess comments while still providing a clean description of my code and any interfaces therein. What Language Feature Can You Just Not Live Without? If someone were building a new language and they asked you what one feature they absolutely must include, what would it be? This is getting kind of long, so I figured I'd do my best to summarize: Paraphrased to be language agnostic. If you know of a language which uses something mentioned, please at it in the parenthesis to the right of the feature. And if you have a better format for this list, by all means try it out (if it doesn't seem to work, I'll just roll back). Regular Expressions ~ torial (Perl) Garbage Collection ~ SaaS Developer (Python, Perl, Ruby, Java, .NET) Anonymous Functions ~ Vinko Vrsalovic (Lisp, Python) Arithmetic Operators ~ Jeremy Ross (Python, Perl, Ruby, Java, C#, Visual Basic, C, C++, Pascal, Smalltalk, etc.) Exception Handling ~ torial (Python, Java, .NET) Pass By Reference ~ Chris (Python) Unified String Format WalloWizard (C#) Generics ~ torial (Python, Java, C#) Integrated Query Equivalent to LINQ ~ Vyrotek (C#) Namespacing ~ Garry Shutler () Short Circuit Logic ~ Adam Bellaire ()

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  • Choosing random action, Flash AS3

    - by esryl
    I have 2 actions in a Flash file that I would like to test for conversion. One is opening a link in a tab/window, the other loading the content in a Colorbox iframe over the page. How do I randomly choose one of the following actions? I currently listen for a click on a button: clickJoin.addEventListener(MouseEvent.CLICK,toJoin); My two actions are: navigateToURL(new URLRequest("http://www.google.com/"), '_blank'); and ExternalInterface.call('$.fn.colorbox({ href: "http://www.google.com/", width:"80%", height:"80%", iframe:true, onLoad:function(){ $("#player").css({"visibility":"hidden"}); }, onClosed:function(){ $("#player").css({"visibility":"visible"}); }}) ');

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  • Lua Operator Overloading

    - by Pessimist
    I've found some places on the web saying that operators in Lua are overloadable but I can't seem to find any example. Can someone provide an example of, say, overloading the + operator to work like the .. operator works for string concatenation? EDIT 1: to Alexander Gladysh and RBerteig: If operator overloading only works when both operands are the same type and changing this behavior wouldn't be easy, then how come the following code works? (I don't mean any offense, I just started learning this language): printf = function(fmt, ...) io.write(string.format(fmt, ...)) end Set = {} Set.mt = {} -- metatable for sets function Set.new (t) local set = {} setmetatable(set, Set.mt) for _, l in ipairs(t) do set[l] = true end return set end function Set.union (a,b) -- THIS IS THE PART THAT MANAGES OPERATOR OVERLOADING WITH OPERANDS OF DIFFERENT TYPES -- if user built new set using: new_set = some_set + some_number if type(a) == "table" and type(b) == "number" then print("building set...") local mixedset = Set.new{} for k in pairs(a) do mixedset[k] = true end mixedset[b] = true return mixedset -- elseif user built new set using: new_set = some_number + some_set elseif type(b) == "table" and type(a) == "number" then print("building set...") local mixedset = Set.new{} for k in pairs(b) do mixedset[k] = true end mixedset[a] = true return mixedset end if getmetatable(a) ~= Set.mt or getmetatable(b) ~= Set.mt then error("attempt to 'add' a set with a non-set value that is also not a number", 2) end local res = Set.new{} for k in pairs(a) do res[k] = true end for k in pairs(b) do res[k] = true end return res end function Set.tostring (set) local s = "{" local sep = "" for e in pairs(set) do s = s .. sep .. e sep = ", " end return s .. "}" end function Set.print (s) print(Set.tostring(s)) end s1 = Set.new{10, 20, 30, 50} s2 = Set.new{30, 1} Set.mt.__add = Set.union -- now try to make a new set by unioning a set plus a number: s3 = s1 + 8 Set.print(s3) --> {1, 10, 20, 30, 50}

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  • Using core plot for iPhone, drawing date on x axis

    - by xmax
    I have available an array of dictionary that contains NSDate and NSNumber values. I wanted to plot date on X axis. for plotting I need to supply xRanges to plot with some decimal values.I don't understand how can i supply NSdate values to xRange (low and length). And what should be there in this method: -(NSNumber *)numberForPlot:(CPPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index I mean how my date value will be returned as NSNumber..? I think i should use some interval over there.but what should be the exact conversion..? can any one explain me what are the exact requirement to plot the date on xAxis..? I am plotting my plot in half of the view.

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  • Is JAX-RS suitable as a MVC framework?

    - by deamon
    JAX-RS has some MVC support, but I wonder if JAX-RS is really a good choice to build web application for human use. If a user enters wrong or incomplete information in a form, it should be displayed again like with Grails or Wicket. Is there a comfortable way to do this with JAX-RS? As far as I know the URI mapping doesn't work correctly, if not all required parameters are given or there are type conversion problems (with Date for example). Is that correct? Is there support for internationalized templates?

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  • B-V to Kelvin formula

    - by PeanutPower
    Whilst looking for a "B-V color index to temperature conversion formula" I found this javascript: var C1 = 3.979145; var C2 = -0.654499; var C3 = 1.74069; var C4 = -4.608815; var C5 = 6.7926; var C6 = -5.39691; var C7 = 2.19297; var C8 = -.359496; bmv = parseFloat(BV); with (Math) { logt= C1 +C2*bmv +C3*pow(bmv,2) +C4*pow(bmv,3) +C5*pow(bmv,4) +C6*pow(bmv,5) +C7*pow(bmv,6) +C8*pow(bmv,7); t=pow(10,logt); } Which is supposed to convert B-V color index to temperature. Does anyone understand how this is working and if the output value is an approximation for temperature in celcius or kelvin? Is it something to do with products of logarithms?

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