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  • How to use regex to extract nested patterns

    - by Rob Romanek
    Hi I'm struggling with some regex I've got a string like this: a:b||c:{d:e||f:g}||h:i basically name value pairings. I want to be able to parse out the pairings so I get: a:b c:{d:e||f:g} h:i then I can further parse the pairings contained in { } if required It is the nesting that is making me scratch my head. Any regex experts out there that can give me a hand? thanks, Rob

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  • Why do these nested while loops not work?

    - by aliov
    I tried and tried and tried to get this code to work and kept coming up with zilch. So I decided to try it using "for loops" instead and it worked first try. Could somebody tell me why this code is no good? <?php $x = $y = 10; while ($x < 100) { while ($y < 100) { $num = $x * $y; $numstr = strval($num); if ($numstr == strrev($numstr)) { $pals[] = $numstr; } $y++; } $x++; } ?>

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  • nested attributes with polymorphic has_one model

    - by Millisami
    I am using accepts_nested_attributes_for with the has_one polymorphic model in rails 2.3.5 Following are the models and its associations: class Address < ActiveRecord::Base attr_accessible :city, :address1, :address2 belongs_to :addressable, :polymorphic => true validates_presence_of :address1, :address2, :city end class Vendor < ActiveRecord::Base attr_accessible :name, :address_attributes has_one :address, :as => :addressable, :dependent => :destroy accepts_nested_attributes_for :address end This is the view: - form_for @vendor do |f| = f.error_messages %p = f.label :name %br = f.text_field :name - f.fields_for :address_attributes do |address| = render "shared/address_fields", :f => address %p = f.submit "Create" This is the partial shared/address_fields.html.haml %p = f.label :city %br= f.text_field :city %span City/Town name like Dharan, Butwal, Kathmandu, .. %p = f.label :address1 %br= f.text_field :address1 %span City Street name like Lazimpat, New Road, .. %p = f.label :address2 %br= f.text_field :address2 %span Tole, Marg, Chowk name like Pokhrel Tole, Shanti Marg, Pako, .. And this is the controller: class VendorsController < ApplicationController def new @vendor = Vendor.new end def create @vendor = Vendor.new(params[:vendor]) if @vendor.save flash[:notice] = "Vendor created successfully!" redirect_to @vendor else render :action => 'new' end end end The problem is when I fill in all the fileds, the record gets save on both tables as expected. But when I just the name and city or address1 filed, the validation works, error message shown, but the value I put in the city or address1, is not persisted or not displayed inside the address form fields? This is the same case with edit action too. Though the record is saved, the address doesn't show up on the edit form. Only the name of the Client model is shown. Actually, when I look at the log, the address model SQL is not queried even at all.

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  • JavaScript and XML Dom - Nested Loop

    - by BSteck
    So I'm a beginner in XML DOM and JavaScript but I've run into an issue. I'm using the script to display my XML data in a table on an existing site. The problem comes in nesting a loop in my JavaScript code. Here is my XML: <?xml version="1.0" encoding="utf-8"?> <book_list> <author> <first_name>Mary</first_name> <last_name>Abbott Hess</last_name> <books> <title>The Healthy Gourmet Cookbook</title> </books> </author> <author> <first_name>Beverly</first_name> <last_name>Bare Bueher</last_name> <books> <title>Cary Grant: A Bio-Bibliography</title> <title>Japanese Films</title> </books> </author> <author> <first_name>James P.</first_name> <last_name>Bateman</last_name> <books> <title>Illinois Land Use Law</title> </books> </author> </book_list> I then use this JavaScript code to read and display the data: > <script type="text/javascript"> if > (window.XMLHttpRequest) { > xhttp=new XMLHttpRequest(); } else > // Internet Explorer 5/6 { > xhttp=new > ActiveXObject("Microsoft.XMLHTTP"); > } xhttp.open("GET","books.xml",false); > xhttp.send(""); > xmlDoc=xhttp.responseXML; > > document.write("<table>"); var > x=xmlDoc.getElementsByTagName("author"); > for (i=0;i<x.length;i++) { > document.write("<tr><td>"); > document.write(x[i].getElementsByTagName("first_name")[0].childNodes[0].nodeValue); > document.write("&nbsp;"); > document.write(x[i].getElementsByTagName("last_name")[0].childNodes[0].nodeValue); > document.write("</td><td>"); > document.write(x[i].getElementsByTagName("title")[0].childNodes[0].nodeValue); > document.write("</td></tr>"); } > document.write("</table>"); </script> The code works well except it only returns the first title element of each author. I somewhat understand why it's doing that, but I don't know how to nest another loop so when the script runs it displays all the titles for an author, not just the first. Whenever I try to nest a loop it breaks the entire script.

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  • nested sortable table rows jquery

    - by FLY
    Hi, I am trying to sort rows of a table, and put them as 'child' elements of a table row I found this: http://code.google.com/p/nestedsortables/ this works with ul li lists, but i want to build it for a table. <table> <thead> <th>tablehead</th> </thead> <tbody> <tr><td>somevalue</td></tr> <tr><td>somevalue2</td></tr> </tbody> </table> so yeah you can use jquery.sortable() and sort the rows, but i want 'somevalue' to be become a child element of 'somevalue2' if you drag 'somevalue' over 'somevalue2' I don't know if it is posible with a table. can anyone help me? Thnx!

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  • nested sql statment using and

    - by klay
    hi guys, how to make this work in mysql? select ID,COMPANY_NAME,contact1, SUBURB, CATEGORY, PHONE from Victoria where (city in ( select suburb from allsuburbs)) and CATEGORY='Banks' this below statement is working: select ID,COMPANY_NAME,contact1, SUBURB, CATEGORY, PHONE from Victoria where city in ( select suburb from allsuburbs) if I add "and" , it gives me an empty resultset, thanks

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  • jQueryUI Sortable won't accept connected Draggable on a nested UL

    - by Eric
    I've posted an example here: http://jsfiddle.net/ericclemmons/LEHLX/2/ Really, what it comes down to is the classic "assigning users to groups" issue. I have a list of users and a list of groups, but I'd like to be able to have nesting of the groups: user "Eric" would be in "Users", "Web", and "Administrators". The problem is that I cannot drag a user to an empty <ul> in the list.

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  • Nested Groups in Regex

    - by cryptic-star
    I'm constructing a regex that is looking for dates. I would like to return the date found and the sentence it was found in. In the code below, the strings on either side of date_string should check for the conditions of a sentence. For your sake, I've omitted the regex for date_string - sufficed to say, it works for picking out dates. While the inside of date_string isn't important, it is grouped as one entire regex. "((?:[^.|?|!]*)"+date_string+"(?:[^.|?|!]*[.|?|!]\s*))" The problem is that date_string is only matching the last number of any given date, presumably because the regex in front of date_string is matching too far and overrunning the date regex. For example, if I say "Independence Day is July 4.", I will get the sentence and 4, even though it should match 'July 4'. In case you're wondering, my regex inside date_string are ordered in such a way that 'July 4' should match first. Is there any way to do this all in one regex? Or do I need to split it up somehow (i.e. split up all text into sentences, and then check each sentence)?

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  • Python: Indexing list for element in nested list

    - by aquateenfan
    I know what I'm looking for. I want python to tell me which list it's in. Here's some pseudocode: item = "a" nested_list = [["a", "b"], ["c", "d"]] list.index(item) #obviously this doesn't work here I would want python to return 0 (because "a" is an element in the first sub-list in the bigger list). I don't care which sub-element it is. I don't care if there are duplicates, e.g., ["a", "b", "a"] should return the same thing as the above example. Sorry if this is a dumb question. I'm new to programming.

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  • Odd nested dictionary behavior in python

    - by adept
    Im new two python and am trying to grow a dictionary of dictionaries. I have done this in php and perl but python is behaving very differently. Im sure it makes sense to those more familiar with python. Here is my code: colnames = ['name','dob','id']; tablehashcopy = {}; tablehashcopy = dict.fromkeys(colnames,{}); tablehashcopy['name']['hi'] = 0; print(tablehashcopy); Output: {'dob': {'hi': 0}, 'name': {'hi': 0}, 'id': {'hi': 0}} The problem arises from the 2nd to last statement(i put the print in for convenience). I expected to find that one element has been added to the 'name' dictionary with the key 'hi' and the value 0. But this key,value pair has been added to EVERY sub-dictionary. Why? I have tested this on my ubuntu machine in both python 2.6 and python 3.1 the behaviour is the same.

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  • VBA nested Loop flow control

    - by PCGIZMO
    I will be brief and stick to what I know. This code for the most part works as it should. The only issue is in the iteration of the x and z loop. these to loops should set the range and yLABEL for the Y loop. I can get through a set and come up with the correct range after that things go bonkers. I know some of it has to do with not breaking out of x to set z and then back to x update the range. It should work z is found then x. the range between them is set for y. then next x but y stays then rang between y and x is set for y.. so on and so forth kinda like a slinky down the stairs. or a slide rule depending on how I set the loops either way I end up all over the place after a couple iterations. I have done a few things but each time I break out of x to set z , X restarts at the top of the range. At least that's what I think I am seeing. In the example sheet i have since changed the way the way the offset works with the loop but the idea is still the same. I have goto statements at this time i was going to try figuring out conditional switches after the loops were working. Any help direction or advice is appreciated. Option Explicit Sub parse() Application.DisplayAlerts = False 'Application.EnableCancelKey = xlDisabled Dim strPath As String, strPathused As String strPath = "C:\clerk plan2" Dim objfso As FileSystemObject, objFolder As Folder, objfile As Object Set objfso = CreateObject("Scripting.FileSystemObject") Set objFolder = objfso.GetFolder(strPath) 'Loop through objWorkBooks For Each objfile In objFolder.Files If objfso.GetExtensionName(objfile.Path) = "xlsx" Then Dim objWorkbook As Workbook Set objWorkbook = Workbooks.Open(objfile.Path) ' Set path for move to at end of script strPathused = "C:\prodplan\used\" & objWorkbook.Name objWorkbook.Worksheets("inbound transfer sheet").Activate objWorkbook.Worksheets("inbound transfer sheet").Cells.UnMerge 'Range management WB Dim SRCwb As Worksheet, SRCrange1 As Range, SRCrange2 As Range, lastrow As Range Set SRCwb = objWorkbook.Worksheets("inbound transfer sheet") Set SRCrange1 = SRCwb.Range("g3:g150") Set SRCrange2 = SRCwb.Range("a1:a150") Dim DSTws As Worksheet Set DSTws = Workbooks("clerkplan2.xlsm").Worksheets("transfer") Dim STR1 As String, STR2 As String, xVAL As String, zVAL As String, xSTR As String, zSTR As String STR1 = "INBOUND TRANS" STR2 = "INBOUND CA TRANS" Dim x As Variant, z As Variant, y As Variant, zxRANGE As Range For Each z In SRCrange2 zSTR = Mid(z, 1, 16) If zSTR <> STR2 Then GoTo zNEXT If zSTR = STR2 Then zVAL = z End If For Each x In SRCrange2 xSTR = Mid(x, 1, 13) If xSTR <> STR1 Then GoTo xNEXT If xSTR = STR1 Then xVAL = x End If Dim yLABEL As String If xVAL = x And zVAL = z Then If x.Row > z.Row Then Set zxRANGE = SRCwb.Range(x.Offset(1, 0).Address & " : " & z.Offset(-1, 0).Address) yLABEL = z.Value Else Set zxRANGE = SRCwb.Range(z.Offset(-1, 0).Address & " : " & x.Offset(1, 0).Address) yLABEL = x.Value End If End If MsgBox zxRANGE.Address ' DEBUG For Each y In zxRANGE If y.Offset(0, 6) = "Temp" Or y.Offset(0, 14) = "Begin Time" Or y.Offset(0, 15) = "End Time" Or _ Len(y.Offset(0, 6)) = 0 Or Len(y.Offset(0, 14)) = 0 Or Len(y.Offset(0, 15)) = "0" Then yNEXT Set lastrow = Workbooks("clerkplan2.xlsm").Worksheets("transfer").Range("c" & DSTws.Rows.Count).End(xlUp).Offset(1, 0) y.Offset(0, 6).Copy lastrow.PasteSpecial Paste:=xlPasteValues, operation:=xlNone, skipblanks:=True, Transpose:=False DSTws.Activate ActiveCell.Offset(0, -1) = objWorkbook.Name ActiveCell.Offset(0, -2) = yLABEL objWorkbook.Activate y.Offset(0, 14).Copy Set lastrow = Workbooks("clerkplan2.xlsm").Worksheets("transfer").Range("d" & DSTws.Rows.Count).End(xlUp).Offset(1, 0) lastrow.PasteSpecial Paste:=xlPasteValues, operation:=xlNone, skipblanks:=True, Transpose:=False objWorkbook.Activate y.Offset(0, 15).Copy Set lastrow = Workbooks("clerkplan2.xlsm").Worksheets("transfer").Range("e" & DSTws.Rows.Count).End(xlUp).Offset(1, 0) lastrow.PasteSpecial Paste:=xlPasteValues, operation:=xlNone, skipblanks:=True, Transpose:=False yNEXT: Next y xNEXT: Next x zNEXT: Next z strPathused = "C:\clerk plan2\used\" & objWorkbook.Name objWorkbook.Close False 'Move proccesed file to new Dir Dim OldFilePath As String Dim NewFilePath As String OldFilePath = objfile 'original file location NewFilePath = strPathused ' new file location Name OldFilePath As NewFilePath ' move the file End If Next End Sub

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  • Rails - Debugging Nested Routes

    - by stringo0
    Hi, I have 2 models, Assessments and Questions. Assessments have many questions. In routes, I have: map.resources :assessments, :has_many => :questions map.root :assessments I checked rake routes, it's as expected On the form to create a new question, I get the following error: undefined method `questions_path' for #<ActionView::Base:0x6d3cdb8> If I take out the form, the view loads fine, so I think it's something with the code in this view - I'm getting the error on the form_for line: <h1>New question</h1> <% form_for [@assessment, @question] do |f| %> <%= f.error_messages %> <p> <%= f.label :content %><br /> <%= f.text_field :content %> </p> <p> <%= f.submit 'Create' %> </p> <% end %> <%= link_to 'Cancel', assessment_path(@assessment) %> Link to rake routes, if needed - http://pastebin.com/LxjfmXQw Can anyone help me debug it? Thanks!

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  • nested linq-to-sql queries

    - by ile
    var result = ( from contact in db.Contacts join user in db.Users on contact.CreatedByUserID equals user.UserID orderby contact.ContactID descending select new ContactListView { ContactID = contact.ContactID, FirstName = contact.FirstName, LastName = contact.LastName, Company = (from field in contact.XmlFields.Descendants("Company") select field.Value).SingleOrDefault().ToString() }).Take(10); Here I described how my database tables look like. So, contacts table has one field that is xml type. In that field is stored Company filename and I need to read it. I tried it using this way: Company = (from field in contact.XmlFields.Descendants("Company") select field.Value).SingleOrDefault().ToString() }).Take(10); but I get following error: Member access 'System.String Value' of 'System.Xml.Linq.XElement' not legal on type 'System.Collections.Generic.IEnumerable`1[System.Xml.Linq.XElement]. Any solution for this? Thanks in advance, Ile

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  • Set value in controller using nested resource

    - by vectran
    I have two models, product and order. Product - cost - id Order - cost - product_id Each time someone places an order, it captures the product_id through a radio button value in the "new order" form. In the controller when creating the new order it needs to set order.cost to order.product.cost. Logically I thought the code should be something like this: def create ... @order.cost == @order.product.cost ... end However I can't seem to make it work at all, hence me asking the question here. Any help is answering (or naming) the question would be greatly appreciated.

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  • Rails 3 nested forms with has_many :through, entry in join table dosen't get deleted after update

    - by Hadi S.
    Hi, i have a 'User' model which has a has_many relationship to a 'Number' model through a join table 'user_number' model. I use accepts_nested_attributes_for :numbers, :allow_destroy = true in the 'User' model. Everything works fine except that whenever i delete a number from a user in the edit form, the associated number is deleted correctly in the 'number' table, but not the entry in the 'user_number' join table. In the update controller action i only use this: ... if @user.update_attributes(params[:user]) ... How can i force rails to also delete the associated entry in the join table?

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  • cant access nested ressource 'comments' in rails 3.0.1

    - by DannyRe
    Hey, I hope you can help me. /config/routes.rb resources :deadlines do resources :comments end /model/comment.rb class Comment < ActiveRecord::Base belongs_to :post, :class_name = "Post", :foreign_key = "post_id" end /model/post.rb class Post < ActiveRecord::Base has_many :comments end When I want to visit: http://localhost:3000/posts/1/comments/new it says: undefined method `comments_path' for #<#:0x4887138 in _form.html I use 'formtastic' and the _form.html.erb looks like this: <% semantic_form_for [@comment] do |form| % <% form.inputs do % <%= form.input :content % <% end % <% form.buttons do % <%= form.commit_button % <% end % <% end %

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  • MS-Access nested DIR - check if a file exists elsewhere whilst looping through a folder

    - by David Carle
    I have used the DIR() command in Microsoft Access 2003 to loop through the files in folder A. This works fine, but I need to check if each file also exists in another location (folder B), and only process the file if it doesn't exist in folder B. The problem is that checking for the file existing in folder B also uses the DIR() function and this then resets or confuses the original one, with the result that no further files are found in folder A. Is there a way to check if a file exists without using DIR? Or, is there a way to have a separate instance of DIR? I suppose I could build a list of the files in folder A into an array and then process the entries in the array, but this seems rather 'clunky' Any suggestions for a better solution? Thanks

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  • Trying to set up nested while loops using a boolean switch

    - by thorn100
    First time posting. I'm trying to set up a while loop that will ask the user for the employee name, hours worked and hourly wage until the user enters 'DONE'. Eventually I'll modify the code to calculate the weekly pay and write it to a list, but one thing at a time. The problem is once the main while loop executes once, it just stops. Doesn't error out but just stops. I have to kill the program to get it to stop. I want it to ask the three questions again and again until the user is finished. Thoughts? Please note that this is just an exercise and not meant for any real world application. def getName(): """Asks for the employee's full name""" firstName=raw_input("\nWhat is your first name? ") lastName=raw_input("\nWhat is your last name? ") fullName=firstName.title() + " " + lastName.title() return fullName def getHours(): """Asks for the number of hours the employee worked""" hoursWorked=0 while int(hoursWorked)<1 or int(hoursWorked) > 60: hoursWorked=raw_input("\nHow many hours did the employee work: ") if int(hoursWorked)<1 or int(hoursWorked) > 60: print "Please enter an integer between 1 and 60." else: return hoursWorked def getWage(): """Asks for the employee's hourly wage""" wage=0 while float(wage)<6.00 or float(wage)>20.00: wage=raw_input("\nWhat is the employee's hourly wage: ") if float(wage)<6.00 or float(wage)>20.00: print ("Please enter an hourly wage between $6.00 and $20.00") else: return wage ##sentry variables employeeName="" employeeHours=0 employeeWage=0 booleanDone=False #Enter employee info print "Please enter payroll information for an employee or enter 'DONE' to quit." while booleanDone==False: while employeeName=="": employeeName=getName() if employeeName.lower()=="done": booleanDone=True break print "The employee's name is", employeeName while employeeHours==0: employeeHours=getHours() if employeeHours.lower()=="done": booleanDone=True break print employeeName, "worked", employeeHours, "this week." while employeeWage==0: employeeWage=getWage() if employeeWage.lower()=="done": booleanDone=True break print employeeName + "'s hourly wage is $" + employeeWage

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  • nested form & habtm

    - by brewster
    so i am trying to save to a join table in a habtm relationship, but i am having problems. from my view, i pass in a group id with: = link_to "Create New User", new_user_url(:group => 1) User model (user.rb) class User < ActiveRecord::Base has_and_belongs_to_many :user_groups accepts_nested_attributes_for :user_groups end UserGroups model (user_groups.rb) class UserGroup < ActiveRecord::Base has_and_belongs_to_many :users end users_controller.rb def new @user = User.new(:user_group_ids => params[:group]) end in the new user view, i have access to the User.user_groups object, however when i submit the form, not only does it not save into my join table (user_groups_users), but the object is no longer there. all the other objects & attributes of my User object are persistent except for the user group. i just started learning rails, so maybe i am missing something conceptually here, but i have been really struggling with this.

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  • Break the nested(double) loop in python

    - by prosseek
    I use the following method to break the double loop in Python. for word1 in buf1: find = False for word2 in buf2: ... if res == res1: print "BINGO " + word1 + ":" + word2 find = True if find: break Is there better way to break the double loop?

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  • Nested luabind classes declared in Lua

    - by Matt Fichman
    I am trying to declare a class B in a namespace A using Luabind (from the Lua side). I figure that if Luabind has a clean way to do this, it would look something like this: class 'A.B' (Super) function A.B:__init() Super.__init(self) end Notice that the B class is defined in the A table. I know the following hackish way of doing this: class 'A.B' (Super) A = {} A.B = _G['A.B'] However, I would really like to know if Luabind provides this feature explicitly.

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  • How to use iterator in nested arraylist

    - by Muhammad Abrar
    I am trying to build an NFA with a special purpose of searching, which is totally different from regex. The State has following format class State implements List{ //GLOBAL DATA static int depth; //STATE VALUES String stateName; ArrayList<String> label = new ArrayList<>(); //Label for states //LINKS TO OTHER STATES boolean finalState; ArrayList<State> nextState ; // Link with multiple next states State preState; // previous state public State() { stateName = ""; finalState = true; nextState = new ArrayList<>(); } public void addlabel(String lbl) { if(!this.label.contains(lbl)) this.label.add(lbl); } public State(String state, String lbl) { this.stateName = state; if(!this.label.contains(lbl)) this.label.add(lbl); depth++; } public State(String state, String lbl, boolean fstate) { this.stateName = state; this.label.add(lbl); this.finalState = fstate; this.nextState = new ArrayList<>(); } void displayState() { System.out.print(this.stateName+" --> "); for(Iterator<String> it = label.iterator(); it.hasNext();) { System.out.print(it.next()+" , "); } System.out.println("\nNo of States : "+State.depth); } Next, the NFA class is public class NFA { static final String[] STATES= {"A","B","C","D","E","F","G","H","I","J","K","L","M" ,"N","O","P","Q","R","S","T","U","V","W","X","Y","Z"}; State startState; State currentState; static int level; public NFA() { startState = new State(); startState = null; currentState = new State(); currentState = null; startState = currentState; } /** * * @param st */ NFA(State startstate) { startState = new State(); startState = startstate; currentState = new State(); currentState = null; currentState = startState ; // To show that their is only one element in NFA } boolean insertState(State newState) { newState.nextState = new ArrayList<>(); if(currentState == null && startState == null ) //if empty NFA { newState.preState = null; startState = newState; currentState = newState; State.depth = 0; return true; } else { if(!Exist(newState.stateName))//Exist is used to check for duplicates { newState.preState = currentState ; currentState.nextState.add(newState); currentState = newState; State.depth++; return true; } } return false; } boolean insertState(State newState, String label) { newState.label.add(label); newState.nextState = null; newState.preState = null; if(currentState == null && startState == null) { startState = newState; currentState = newState; State.depth = 0; return true; } else { if(!Exist(newState.stateName)) { newState.preState = currentState; currentState.nextState.add(newState); currentState = newState; State.depth++; return true; } else { ///code goes here } } return false; } void markFinal(State s) { s.finalState = true; } void unmarkFinal(State s) { s.finalState = false; } boolean Exist(String s) { State temp = startState; if(startState.stateName.equals(s)) return true; Iterator<State> it = temp.nextState.iterator(); while(it.hasNext()) { Iterator<State> i = it ;//startState.nextState.iterator(); { while(i.hasNext()) { if(i.next().stateName.equals(s)) return true; } } //else // return false; } return false; } void displayNfa() { State st = startState; if(startState == null && currentState == null) { System.out.println("The NFA is empty"); } else { while(st != null) { if(!st.nextState.isEmpty()) { Iterator<State> it = st.nextState.iterator(); do { st.displayState(); st = it.next(); }while(it.hasNext()); } else { st = null; } } } System.out.println(); } /** * @param args the command line arguments */ /** * * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here NFA l = new NFA(); State s = new State("A11", "a",false); NFA ll = new NFA(s); s = new State("A111", "a",false); ll.insertState(s); ll.insertState(new State("A1","0")); ll.insertState(new State("A1111","0")); ll.displayNfa(); int j = 1; for(int i = 0 ; i < 2 ; i++) { int rand = (int) (Math.random()* 10); State st = new State(STATES[rand],String.valueOf(i), false); if(l.insertState(st)) { System.out.println(j+" : " + STATES[rand]+" and "+String.valueOf(i)+ " inserted"); j++; } } l.displayNfa(); System.out.println("No of states inserted : "+ j--); } I want to do the following This program always skip to display the last state i.e. if there are 10 states inserted, it will display only 9. In exist() method , i used two iterator but i do not know why it is working I have no idea how to perform searching for the existing class name, when dealing with iterators. How should i keep track of current State, properly iterate through the nextState List, Label List in a depth first order. How to insert unique States i.e. if State "A" is inserted once, it should not insert it again (The exist method is not working) Best Regards

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