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  • Processing an n-ary ANTLR AST one child at a time

    - by Chris Lieb
    I currently have a compiler that uses an AST where all children of a code block are on the same level (ie, block.children == {stm1, stm2, stm3, etc...}). I am trying to do liveness analysis on this tree, which means that I need to take the value returned from the processing of stm1 and then pass it to stm2, then take the value returned by stm2 and pass it to stm3, and so on. I do not see a way of executing the child rules in this fashion when the AST is structured this way. Is there a way to allow me to chain the execution of the child grammar items with my given AST, or am I going to have to go through the painful process of refactoring the parser to generate a nested structure and updating the rest of the compiler to work with the new AST? Example ANTLR grammar fragment: block : ^(BLOCK statement*) ; statement : // stuff ; What I hope I don't have to go to: block : ^(BLOCK statementList) ; statementList : ^(StmLst statement statement+) | ^(StmLst statement) ; statement : // stuff ;

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  • Speed up math code in C# by writing a C dll?

    - by Projectile Fish
    I have a very large nested for loop in which some multiplications and additions are performed on floating point numbers. for (int i = 0; i < length1; i++) { s = GetS(i); c = GetC(i); for(int j = 0; j < length2; j++) { double oldU = u[j]; u[j] = c * oldU + s * omega[i][j]; omega[i][j] = c * omega[i][j] - s * oldU; } } This loop is taking up the majority of my processing time and is a bottleneck. Would I be likely to see any speed improvements if I rewrite this loop in C and interface to it from C#?

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  • Adding CSS styles to injected DOM elements

    - by Nyxynyx
    I am using javascript to inject a few DOM elements into the page. I am able to inject a single DOM element and apply CSS style to it: var $e = $('<div id="header"></div>'); $('body').append($e); $e.css({ background: '#fbf7f7', }); Problem: If I have nested elements within $e, how can I apply CSS styles to the parents and its children seperately? var $e = $('<div id="header"><div class="header-content"><span class="title"></span></div></div>');

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  • Can jQuery UI's Sortable handle complex selectors for the items option?

    - by jverdi
    I have list items in an unordered list that when double clicked, can be edited in place via a wysiwyg editor. $('ul.mtm_section').sortable({ disabled: true, distance: 10, items: '> li:not(:has(form))' }); My goal is to prevent the list item from being sorted while it is being edited - aka once a form element has been swapped in place of the contents. Unfortunately my selector for items is not working. Is sortable able to handle complex selectors like these? If not, are there other clever means to disable some items from being sortable, perhaps a callback function? I would prefer to rely on this sortable option, as the wysiwyg plugin is deeply nested with jEditable and as far as I know does not open up any events for me to hook into. Using jQuery 1.4.2 and jQuery UI 1.8.1

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  • advanced python autovivification

    - by Zhang18
    This question is about implementing the full PERL autovivification in python. I know similary questions were asked before and so far the best answre is http://stackoverflow.com/questions/635483/what-is-the-best-way-to-implement-nested-dictionaries-in-python/652284#652284. However, I'm looking to do this: a['x']['y'].append('z') without declaring a['x']['y'] = [] first, or rather, not declaring a['x'] = {} either. I know dict and list classes sorta don't mix so this is hard, but I'm interested in seeing if someone has an ingenius solution probably involving creating an inherited class from dict but defined a new append method on it? I also know this might throw off some python purists who will ask me to stick with Perl. But even just for a challenge, I'd like to see something. thx!

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  • How do i handle a heavy page?

    - by Ulhas Tuscano
    I have been asked to design & develop a page in asp.net which contains 7 tabs.Each table contains 2 Editable gridview & clicking on gridview cell should open a popup & that popup will open a new popup ( I would say nested popup). even when i switch from one tab to another. It should hold the griddata & whenever user will finish all the operations he/she will click on save button which will save all the data contained in the tabs. The page is really too too too heavy. It will definitely take a long time to load as it contains gridview operations , popup related jobs, tab data & tab switching. I am finding the best way i can achieve this with an acceptable speed of operation. Any suggestions or help would be greatly appreciated.

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  • What is the best filesystem for storing thousands of files in one dictionary-like id-blob structure?

    - by Ivan
    What filesystem best suits my needs? Thousands or even millions of files in one directory. Good (ext4 & ntfs level or close) reliability (incl. fault tolerance) and access speed. No directories actually needed, as well as descriptive names, just a dictionary-like structure of id-blob pairs is all I need. No links, attributes, and access control features needed. The purpose is a file storage where all the metadata (data describing all the facts about what the file actually contains and who can access it) is stored in a MySQL database. As far as I know common filesystems like NTFS and ext3/4 can go dead-slow if there are too many files placed in one directory - that's why I ask.

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  • bloated jquery xml requests

    - by Tim Joyce
    Hi, I was wondering if anyone had an alternative to this. $(xml).find("a").each(function(){ $(this).find('b').each(function(){ $(this).find('c').each(function(){ $(this).find('d1').each(function(){ sectionValidation.RegisterTerms.setRegisterTermsArray(this); }); $(this).find('d2').each(function(){ sectionValidation.RegisterTerms.checkValidVariations(this, val); }); }); }); }); It seems really bloated and there has to be a more elegant approach to getting nested xml data. Thank you

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  • How best to debug Delphi using the IDE and/or FOSS?

    - by LeonixSolutions
    I am currently using Delphi 7 and unsure whether to upgrade. I see the following means of debugging and wonder if there are others or which FOSS tools a small company can use (we don't do much Windows programming). 1 Debug in the IDE, by setting breakpoints, using watches, etc 2 Debug in the IDE, by using the Event Log I got some good info from this page and tweaked it to add timestamps and indent/outdent on procedure call/return, so that I can see nested calls more quickly. Does anyone know of anything better ? 3 Using a profiler 4 Any others? Such as MadExcept, etc?

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  • Root certificate authority works windows/linux but not mac osx - (malformed)

    - by AKwhat
    I have created a self-signed root certificate authority which if I install onto windows, linux, or even using the certificate store in firefox (windows/linux/macosx) will work perfectly with my terminating proxy. I have installed it into the system keychain and I have set the certificate to always trust. Within the chrome browser details it says "The certificate that Chrome received during this connection attempt is not formatted correctly, so Chrome cannot use it to protect your information. Error type: Malformed certificate" I used this code to create the certificate: openssl genrsa -des3 -passout pass:***** -out private/server.key 4096 openssl req -batch -passin pass:***** -new -x509 -nodes -sha1 -days 3600 -key private/server.key -out server.crt -config ../openssl.cnf If the issue is NOT that it is malformed (because it works everywhere else) then what else could it be? Am I installing it incorrectly? Update I tried changing the certificate attributes, but to no avail: openssl genrsa -des -passout pass:***** -out private/server.key 2048 openssl req -batch -passin pass:***** -new -x509 -nodes -sha256 -days 3600 -key private/server.key -out server.crt -config ../openssl.cnf

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  • GVFS Locations Not Available In ~/.gvfs

    - by Aaron Copley
    So, I can mount GVFS locations correctly (specifically CIFS) either from the Gnome "Places" menu, or via the command line gvfs-mount, but the filesystem is not mounted in the expected location; ~/.gvfs. In fact, running the mount command does not list any GVFS filesystem at all. This is reproducible for non-root users while the root user behaves as expected. Strace reveals a permissions error for the user mounting the filesystem for the path /home/username/.gvfs. Ownership and permissions are correct and there are no extended attributes for the path as revealed by lsattr. Also, /root/.gvfs and /home/username/.gvfs are on the same filesystem. All packages are current. Any ideas?

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  • No method 'get' on backbone model save

    - by user888734
    I'm using backbone for a reasonably complicated form. I have a number of nested models, and have been computing other variables in the parent model like so: // INSIDE PARENT MODEL computedValue: function () { var value = this.get('childModel').get('childModelProperty'); return value; } This seems to work fine for keeping my UI in sync, but as soon as I call .save() on the parent model, I get: Uncaught TypeError: Object #<Object> has no method 'get' It seems that the child model kind of temporarily stops responding. Am I doing something inherently wrong? EDIT: The stack trace is: Uncaught TypeError: Object #<Object> has no method 'get' publish.js:90 Backbone.Model.extend.neutralDivisionComputer publish.js:90 Backbone.Model.extend.setNeutralComputed publish.js:39 Backbone.Events.trigger backbone.js:163 _.extend.change backbone.js:473 _.extend.set backbone.js:314 _.extend.save.options.success backbone.js:385 f.Callbacks.o jquery.min.js:2 f.Callbacks.p.fireWith jquery.min.js:2 w jquery.min.js:4 f.support.ajax.f.ajaxTransport.send.d

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  • SQL Query: Using Cursors

    - by user2953138
    I need some directions for SQL Server & Cursors: I have a table named Order: OrderID Item Amount 1 A 10 1 B 1 2 A 5 2 C 4 2 D 21 3 B 11 I have a second table named Storage: Item Amount A 40 B 44 C 20 D 1 For every OrderID, I want to check if enough items are available. If not, I want to return an error message. How can this be done with Cursors at all? Are nested cursors the solution to this? My main issue is to understand how I can fetch the OrderID as actual "Group" of ID=1, 2, 3 etc. instead of line by line

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  • Paperclip: "missing" image when uses has_one

    - by EricR
    I'm working on a website that allows people who run bed and breakfast businesses to post their accommodations. I would like to require that they include a "profile image" of the accommodation when they post it, but I also want to give them the option to add more images later (this will be developed after). I thought the best thing to do would be to use the Paperclip gem and have a Accommodation and a Photo in my application, the later belonging to the first as an association. A new Photo record is created when they create an Accommodation. It has both id and accommodation_id attributes. However, the image is never uploaded and none of the Paperclip attributes get set (image_file_name: nil, image_content_type: nil, image_file_size: nil), so I get Paperclip's "missing" photo. Any ideas on this one? It's been keeping me stuck for a few days now. Accommodation models/accommodation.rb class Accommodation < ActiveRecord::Base validates_presence_of :title, :description, :photo, :thing, :location attr_accessible :title, :description, :thing, :borough, :location, :spaces, :price has_one :photo end controllers/accommodation_controller.erb class AccommodationsController < ApplicationController before_filter :login_required, :only => {:new, :edit} uses_tiny_mce ( :options => { :theme => 'advanced', :theme_advanced_toolbar_location => 'top', :theme_advanced_toolbar_align => 'left', :theme_advanced_buttons1 => 'bold,italic,underline,bullist,numlist,separator,undo,redo', :theme_advanced_buttons2 => '', :theme_advanced_buttons3 => '' }) def index @accommodations = Accommodation.all end def show @accommodation = Accommodation.find(params[:id]) end def new @accommodation = Accommodation.new end def create @accommodation = Accommodation.new(params[:accommodation]) @accommodation.photo = Photo.new(params[:photo]) @accommodation.user_id = current_user.id if @accommodation.save flash[:notice] = "Successfully created your accommodation." render :action => 'show' else render :action => 'new' end end def edit @accommodation = Accommodation.find(params[:id]) end def update @accommodation = Accommodation.find(params[:id]) if @accommodation.update_attributes(params[:accommodation]) flash[:notice] = "Successfully updated accommodation." render :action => 'show' else render :action => 'edit' end end def destroy @accommodation = Accommodation.find(params[:id]) @accommodation.destroy flash[:notice] = "Successfully destroyed accommodation." redirect_to :inkeep end private def check_owner end end views/accommodations/_form.html.erb <%= form_for @accommodation, :html => {:multipart => true} do |f| %> <%= f.error_messages %> <p> Title<br /> <%= f.text_field :title, :size => 60 %> </p> <p> Description<br /> <%= f.text_area :description, :rows => 17, :cols => 75, :class => "mceEditor" %> </p> <p> Photo<br /> <%= f.file_field :photo %> </p> [... snip ...] <p><%= f.submit %></p> <% end %> Photo The controller and views are still the same as when Rails generated them. models/photo.erb class Photo < ActiveRecord::Base attr_accessible :image_file_name, :image_content_type, :image_file_size belongs_to :accommodation has_attached_file :image, :styles => { :thumb=> "100x100#", :small => "150x150>" } end

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  • How can I get a list of default documents in IIS using PowerShell?

    - by SGarratt
    I'm managing a Server Core machine and trying to do everything in PowerShell, which is fun. I need a list of the default documents. From other websites, I've found out how to set and remove them, using both xxx-WebConfiguration and xxx-WebConfigurationProperty. I've tried: Get-WebConfigurationProperty -Filter /system.webServer/defaultDocument -PSPath "IIS:\sites\Default Web Site" -Name files but it gives: Collection : {Microsoft.IIs.PowerShell.Framework.ConfigurationElement, Microsoft.IIs.PowerShell.Framework.Configuration Element, Microsoft.IIs.PowerShell.Framework.ConfigurationElement, Microsoft.IIs.PowerShell.Framework.Confi gurationElement...} ItemXPath : /system.webServer/defaultDocument Attributes : {} ChildElements : {} ElementTagName : files Methods : Schema : Microsoft.IIs.PowerShell.Framework.ConfigurationElementSchema which doesn't really help.

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  • Can Somebody Explain this java code

    - by dubbeat
    Hi, I'm just starting out on android and my java is verry rusty. I can't remember ever seeing a function nested in another function like this before. Could somebody explain to me exactly what final does and explain why you would nest a function in another like this? private final Handler handler = new Handler() { @Override public void handleMessage(final Message msg) { Log.v(Constants.LOGTAG, " " + ReviewList.CLASSTAG + " worker thread done, setup ReviewAdapter"); progressDialog.dismiss(); if ((reviews == null) || (reviews.size() == 0)) { empty.setText("No Data"); } else { reviewAdapter = new ReviewAdapter(ReviewList.this, reviews); setListAdapter(reviewAdapter); } } };

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  • Organizing a random list of objects in Python.

    - by Saebin
    So I have a list that I want to convert to a list that contains a list for each group of objects. ie ['objA.attr1', 'objC', 'objA.attr55', 'objB.attr4'] would return [['objA.attr1', 'objA.attr55'], ['objC'], ['objB.attr4']] currently this is what I use: givenList = ['a.attr1', 'b', 'a.attr55', 'c.attr4'] trgList = [] objNames = [] for val in givenList: obj = val.split('.')[0] if obj in objNames: id = objNames.index(obj) trgList[id].append(val) else: objNames.append(obj) trgList.append([val]) #print trgList It seems to run a decent speed when the original list has around 100,000 ids... but I am curious if there is a better way to do this. Order of the objects or attributes does not matter. Any ideas?

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  • Process every pair in a sequence

    - by Henry Jackson
    I'm looking for a concise way to process every (unordered) pair of elements in a sequence in .NET. I know I can do it with nested foreach loops, but I was looking for something a little more readable. I was imagining something like a modified Any() extension method: IEnumerable<Transaction> transactions = ... if (transactions.AnyPair( (first, second) => first.UniqueID == second.UniqueID)) throw ... Or maybe a foreach-style one: IEnumerable<JigsawPiece> pieces = ... pieces.ForEachPair( (first, second) => { TryFit(first, second); }); This question has been asked for other languages (e.g. see http://stackoverflow.com/questions/942543/operation-on-every-pair-of-element-in-a-list), but I'm looking for a .NET solution.

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  • IE Print CSS and spanning page breaks

    - by DA
    I've been working on trying to fix an issue with print CSS and IE where things would disappear when printing in landscape mode. It appears the issue is that the element I'm trying to print (a large DIV with content inside it) spans two pages when put into landscape mode. What is happening is when the element spans two pages, the first page is blank, and the second page is printing what would normally be left over from the first page. I think it's related to contained floats: wrapper div floated div1 floated div2 If I set the two nested divs to float: none in the print CSS file, then IE will print them, albeit not in the layout we'd like. Before I spend another hour on this, anyone know what, specifically, is the issue here and if there's a known workaround?

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  • jQuery: Sorting hierarchical data?

    - by Industrial
    Hi everybody, I have tried for some time to work out a way of sorting nested categories with jQuery. I failed to build my own plugin to do this, so I tried to find something that were available already. Tried a few hours now with this one, http://www.jordivila.net/code/js/jquery/ui-widgetTreeList_inheritance/widgetTreeListSample.aspx and cant get it to work. What are the alternatives of creating a jQuery / jQuery UI script that handles sorting children and parent categories in a way that can be combined with a AJAX PHP backend to handle the actual sorting in the database? Thanks!

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  • How to extract a Sub-Matrix from a Matrix ?

    - by ZaZu
    Hello, I have a matrix in a txt file and I want to load the matrix based on my input of number of rows and columns For example, I have a 5 by 5 matrix in the file. I want to extract a 3 by 3 matrix, how can I do that ? I created a nested loop using : FILE *sample sample=fopen("randomfile.txt","r"); for(i=0;i<rows;i++){ for(j=0;j<cols;j++){ fscanf(sample,"%f",&matrix[i][j]); } fscanf(sample,"\n",&matrix[i][j]); } fclose(sample); Sadly the code does not work .. If I have this matrix : 5.00 4.00 5.00 6.00 5.00 4.00 3.00 25.00 5.00 3.00 4.00 23.00 5.00 2.00 352.00 6.00 And inputting 3 for rows and 3 for columns, I get : 5.00 4.00 5.00 6.00 5.00 4.00 3.00 25.00 5.00 Which is obviously wrong , its reading line by line rather than skipping the unmentioned column ... What am I doing wrong ? Thanks !

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  • How do I get rid of extra lines in my output from Rails

    - by Dan B
    I am using Rails 2.1 to output tables from a database. But the output includes lots of extra lines and tabs. I am using a while loop with lots of nested if statements. I am also wrapping all of my non-output lines in <%- code -%. Any idea what might be happening and a solution? Thanks, ex: <tr> <td>Some data</td> <td>more data</td>

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  • C# Linq: Restructuring object

    - by Ben
    I'd like to take an object like this: SortedList<string, SortedList<int, SortedList<DateTime, double>>> Data and, for a given 'int' value (key of first nested sorted list), restructure it like this: SortedList<DateTime, SortedList<string, double>> or, better yet, this: SortedList<DateTime, double[]> where each 'double[]' has as many elements as there are KeyValue pairs in the SortedList. I'm guessing Linq is the way to go, but can't figure it out. Thanks for any suggestions.

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  • Help with an SQL query on a single (comments) table (screenshot included)

    - by citrus
    Please see screenshot Goal: id like to have comments nested 1 level deep The comments would be arranged so that rating of the parent is in descending order the rating of the children comments is irrelevant The left hand side of the screenshot shows the output that Id like. The RHS shows the table data. All of the comments are held in 1 table. Im a beginner with SQL queries, the best I can do is: SELECT * FROM [Comments] WHERE ([ArticleId] = @ArticleId) ORDER BY [ThreadId] DESC, [DateMade] This somewhat does the job, but it obviously neglects the rating. So the above statement would show output where Bobs Comment and all of the children comments are before Amy's and her childrens comments. How can I run this query correctly?

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  • Loop through custom template hooking thing

    - by tarnfeld
    Hi, I am building a template system for emailing people that currently works in the format of: $array['key1'] = "text; $array['key2'] = "more text"; <!--key1--> // replaced with *text* <!--key2--> // replaced with *more text* For this particular project I have a nested array with this kind of structure: $array['object1']['nest1']['key1'] = "text"; $array['object2']['next1']['key1'] = "more text"; <!--[object1][nest1][key1]--> // replaced with *text* <!--[object2][nest1][key1]--> // replaced with *more text* What would be the best way to do this in PHP? I thought I could loop through the arrays but then I just lost my trail of thought and got lost in what I was doing! All help would be appreciated!! Thanks

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