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Search found 15 results on 1 pages for 'jeriho'.

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• IDEA modular problem (jsp)

  - by Jeriho

  I have project in with 2 separate modules(frontend and backend, first depends on second). When I'm trying to access backend code from frontend code, things going fine. Things turn for the worse when I do the same from jsp. This is stacktrase for simple accessign bean <jsp:useBean id="mybean" class="backend.main.MyBean" scope="request"></jsp:useBean> org.apache.jasper.JasperException: /results.jsp(9,0) The value for the useBean class attribute backend.main.MyBean is invalid. org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40) org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407) org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:148) org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1220) org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1178) org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361) org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411) org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2417) org.apache.jasper.compiler.Node$Root.accept(Node.java:495) org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361) org.apache.jasper.compiler.Generator.generate(Generator.java:3416) org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:231) org.apache.jasper.compiler.Compiler.compile(Compiler.java:347) org.apache.jasper.compiler.Compiler.compile(Compiler.java:327) org.apache.jasper.compiler.Compiler.compile(Compiler.java:314) org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:589) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) And this error will appear if I try to access regular class: An error occurred at line: 12 in the jsp file: /results.jsp backend.main.RegularClass cannot be resolved to a type Stacktrace: org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92) org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330) org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:439) org.apache.jasper.compiler.Compiler.compile(Compiler.java:349) org.apache.jasper.compiler.Compiler.compile(Compiler.java:327) org.apache.jasper.compiler.Compiler.compile(Compiler.java:314) org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:589) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) Sorry for so many stacktraces.

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• Parser combinators info

  - by Jeriho

  I am using parsing combinators in scala If I have recursive parser: val parser = "(?ui)(regexvalue)".r | (parser2~value) How can I check how many characters of input my parser consumed?

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• Converting mutable to immutable map

  - by Jeriho

  private[this]object MMMap extends HashMap[A, Set[B]] with MultiMap[A, B] How convert it to immutable?

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• trait implementation

  - by Jeriho

  If I have some traits like: trait A {...} trait B extends A{...} trait C1 extends B{...} trait C2 extends A{...} I can write class in two ways (C1 and C2 add same functionality) class Concrete1 extends B with C1 class Concrete2 extends B with C2 What variant is better(efficient)?

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• How to create sorted map in scala?

  - by Jeriho

  How to create sorted map in scala (mutable/immutable)?

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• Advanced control of recursive parser in scala

  - by Jeriho

  val uninterestingthings = ".".r val parser = "(?ui)(regexvalue)".r | (uninterestingthings~>parser) This recursive parser will try to parse "(?ui)(regexvalue)".r until the end of input. Is in scala a way to prohibit parsing when some defined number of characters were consumed by "uninterestingthings" ? UPD: I have one poor solution: object NonRecursiveParser extends RegexParsers with PackratParsers{ var max = -1 val maxInput2Consume = 25 def uninteresting:Regex ={ if(max<maxInput2Consume){ max+=1 ("."+"{0,"+max.toString+"}").r }else{ throw new Exception("I am tired") } } lazy val value = "itt".r def parser:Parser[Any] = (uninteresting~>value)|parser def parseQuery(input:String) = { try{ parse(parser, input) }catch{ case e:Exception => } } } Disadvantages: - not all members are lazy vals so PackratParser will have some time penalty - constructing regexps on every "uninteresting" method call - time penalty - using exception to control program - code style and time penalty

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• Sealed alternative

  - by Jeriho

  According to "Programming in scala" a sealed class cannot have any new subclasses added except the ones in the same ?le. In the same book was described a way to enumerate classes that can extend class or trait in multiple files. I have forgotten it and can't find again. Remind it to me, please.

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• Landau notation (ide) tools support

  - by Jeriho

  It is good idea to have impotant information during developing like Landau notation to know functions's time costs. So it should be documented in sources isn't it? I'm looking for tools that can calculate it.

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• Parsing plain text to some structured object

  - by Jeriho

  I am working on parsing plain text and converting it to key-value pairs. For example, plain text: some_uninteresting_thing key1 valueA, valueB, valueC key2 valueD key3 valueE valueF key4 valueG(valueH, valueI) key5 some_uninteresting_thing valueJ some_uninteresting_thing key6 some_uninteresting_thing (key6 shouldn't be mapped because has no appropriate values) As you can see plain text is lenient. What java library can handle this? If no such library exist, any suggestions on algorithm to do this.

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• Restrictions in trait mixing

  - by Jeriho

  I want to have classes that can mix only specified traits: class Peter extends Human with Lawful with Evil class Mag extends Elf with Chaotic with Neutral Is in scala a way to do this?

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• How to get list of traits that were mixed in the specified class?

  - by Jeriho

  And more specific example: abstract trait A trait B extends A trait C extends A How to check what traits that extend trait A (it can be from 0 to many) were mixed in specified class?

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• Creating classes that can be instantiated with single or multiple elements as constructor's argument

  - by Jeriho

  I want to have class that can be instantiated with list, array, seq, set, stack, queue etc. In my opinion class A class B(elems:A*) should handle such stuff. This is my solution: class A class B(elems:Iterable[A]){ def this(elem:A) = this(Seq(elem)) } Can you suggest any improvements?

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• Implementing class for pattern matching

  - by Jeriho

  For example, val list = List(1,2,3) list match{ case a:::b => case _ => } you can match head and tail of a List using :::' or tokens of ParseResult using~'. What should I do to create class that can be matched like preceding classes?

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• Difference between Array and List in scala

  - by Jeriho

  In what cases I should use Array(Buffer) and List(Buffer). Only one difference that I know is that arrays are nonvariant and lists are covariant. But what about performance and some other characteristics?

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• Operator precedence in scala

  - by Jeriho

  I like scala's propose of operator precedence but in some rare case unmodified rules may be inconvenient because you have restrictions in naming your methods. Is there in scala ways to define another rules for a class/file/etc? If not would it be resolved in future?

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