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  • Android Drawable question.

    - by Tarmon
    Hey Everyone, I am trying to create a drawable in code and change the color based on some criteria. I can get it to work but it doesn't want to let me set the padding on the view. Any help would be appreciated. <?xml version="1.0" encoding="utf-8"?> <ImageView android:id="@+id/icon" android:layout_width="50px" android:layout_height="fill_parent" /> <TextView android:id="@+id/label" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingLeft="17px" android:textSize="28sp" /> ImageView icon = (ImageView) row.findViewById(R.id.icon); ShapeDrawable mDrawable; int x = 0; int y = 0; int width = 50; int height = 50; float[] outerR = new float[] { 12, 12, 12, 12, 12, 12, 12, 12 }; mDrawable = new ShapeDrawable(new RoundRectShape(outerR, null, null)); mDrawable.setBounds(x, y+height, x + width, y); switch(position){ case 0: mDrawable.getPaint().setColor(0xffff0000); //Red break; case 1: mDrawable.getPaint().setColor(0xffff0000); //Red break; case 2: mDrawable.getPaint().setColor(0xff00c000); //Green break; case 3: mDrawable.getPaint().setColor(0xff00c000); //Green break; case 4: mDrawable.getPaint().setColor(0xff0000ff); //Blue break; case 5: mDrawable.getPaint().setColor(0xff0000ff); //Blue break; case 6: mDrawable.getPaint().setColor(0xff696969); //Gray break; case 7: mDrawable.getPaint().setColor(0xff696969); //Gray break; case 8: mDrawable.getPaint().setColor(0xffffff00); //Yellow break; case 9: mDrawable.getPaint().setColor(0xff8b4513); //Brown break; case 10: mDrawable.getPaint().setColor(0xff8b4513); //Brown break; case 11: mDrawable.getPaint().setColor(0xff8b4513); //Brown break; case 12: mDrawable.getPaint().setColor(0xffa020f0); //Purple break; case 13: mDrawable.getPaint().setColor(0xffff0000); //Red break; case 14: mDrawable.getPaint().setColor(0xffffd700); //Gold break; case 15: mDrawable.getPaint().setColor(0xffff6600); //Orange break; } icon.setBackgroundDrawable(mDrawable); icon.setPadding(5, 5, 5, 5); If I set the padding in XML it just ignores it. Thanks, Rob

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  • Allow access to my server.

    - by Zachary Brown
    I have a server, did some of the programming myself. It ison my home network, but I need to be able to access it from anywhere over the internet. I have done the port forwarding like I am supposed to, but I still cant get to it from an outside computer. It just displays Internet Explorer cannot display the webpage. I don't know what else to do. I am on a Linksys WRT54G v8 router running ddWRT v24 micro firmware.

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  • Codeigniter: Using URIs with forms

    - by Kevin Brown
    I'm using URIs to direct a function in a library: $id = $this->CI->session->userdata('id'); $URI = $this->CI->uri->uri_string(); $new = "new"; if(strpos($URI, $new) === FALSE){ $method = "update"; } elseif(strpos($URI, $new) !== FALSE){ $method = "create"; } So I have two if statements directing what information to if ($method === 'update') { // Modify form, first load $this->CI->db->from('be_survey'); $this->CI->db->where('user_id' , $id); $survey = $this->CI->db->get(); $user = array_merge($user->row_array(),$survey->row_array()); $this->CI->validation->set_default_value($user); // Display page $data['user'] = $user; } $this->CI->validation->set_rules($rules); if ( $this->CI->validation->run() === FALSE ) { // Output any errors $this->CI->validation->output_errors(); } else { // Submit form $this->_submit($method); } Submit function: function _submit($method) { //Submit and Update for current User $id = $this->CI->session->userdata('id'); $this->CI->db->select('users.id, users.username, users.email, profiles.firstname, profiles.manager_id'); $this->CI->db->from('be_users' . " users"); $this->CI->db->join('be_user_profiles' . " profiles",'users.id=profiles.user_id'); $this->CI->db->having('id', $id); $email_data['user'] = $this->CI->db->get(); $email_data['user'] = $email_data['user']->row(); $manager_id = $email_data['user']->manager_id; $this->CI->db->select('firstname','email')->from('be_user_profiles')->where('user_id', $manager_id); $email_data['manager'] = $this->CI->db->get(); $email_data['manager'] = $email_data['manager']->row(); // Fetch what they entered in the form for($i=1;$i<18;$i++){ $survey["a_".$i]= $this->CI->input->post('a_'.$i); } for($i=1;$i<15;$i++){ $survey["b_".$i]= $this->CI->input->post('b_'.$i); } for($i=1;$i<12;$i++){ $survey["c_".$i]= $this->CI->input->post('c_'.$i); } $profile['firstname'] = $this->CI->input->post('firstname'); $profile['lastname'] = $this->CI->input->post('lastname'); $profile['test_date'] = date ("Y-m-d H:i:s"); $profile['company_name'] = $this->CI->input->post('company_name'); $profile['company_address'] = $this->CI->input->post('company_address'); $profile['company_city'] = $this->CI->input->post('company_city'); $profile['company_phone'] = $this->CI->input->post('company_phone'); $profile['company_state'] = $this->CI->input->post('company_state'); $profile['company_zip'] = $this->CI->input->post('company_zip'); $profile['job_title'] = $this->CI->input->post('job_title'); $profile['job_type'] = $this->CI->input->post('job_type'); $profile['job_time'] = $this->CI->input->post('job_time'); $profile['department'] = $this->CI->input->post('department'); $profile['vision'] = $this->CI->input->post('vision'); $profile['height'] = $this->CI->input->post('height'); $profile['weight'] = $this->CI->input->post('weight'); $profile['hand_dominance'] = $this->CI->input->post('hand_dominance'); $profile['areas_of_fatigue'] = $this->CI->input->post('areas_of_fatigue'); $profile['job_description'] = $this->CI->input->post('job_description'); $profile['injury_review'] = $this->CI->input->post('injury_review'); $profile['job_positive'] = $this->CI->input->post('job_positive'); $profile['risk_factors'] = $this->CI->input->post('risk_factors'); $profile['job_improvement_short'] = $this->CI->input->post('job_improvement_short'); $profile['job_improvement_long'] = $this->CI->input->post('job_improvement_long'); if ($method == "update") { //Begin db transmission $this->CI->db->trans_begin(); $this->CI->home_model->update('Survey',$survey, array('user_id' => $id)); $this->CI->db->update('be_user_profiles',$profile, array('user_id' => $id)); if ($this->CI->db->trans_status() === FALSE) { flashMsg('error','There was a problem entering your test! Please contact an administrator.'); redirect('survey','location'); } else { //Get credits of user and subtract 1 $this->CI->db->set('credits', 'credits -1', FALSE); $this->CI->db->update('be_user_profiles',$profile, array('user_id' => $manager_id)); //Mark the form completed. $this->CI->db->set('test_complete', '1'); $this->CI->db->where('user_id', $id)->update('be_user_profiles'); // Stuff worked... $this->CI->db->trans_commit(); //Get Manager Information $this->CI->db->select('users.id, users.username, users.email, profiles.firstname'); $this->CI->db->from('be_users' . " users"); $this->CI->db->join('be_user_profiles' . " profiles",'users.id=profiles.user_id'); $this->CI->db->having('id', $email_data['user']->manager_id); $email_data['manager'] = $this->CI->db->get(); $email_data['manager'] = $email_data['manager']->row(); //Email User $this->CI->load->library('User_email'); $data_user = array( 'firstname'=>$email_data['user']->firstname, 'email'=> $email_data['user']->email, 'user_completed'=>$email_data['user']->firstname, 'site_name'=>$this->CI->preference->item('site_name'), 'site_url'=>base_url() ); //Email Manager $data_manager = array( 'firstname'=>$email_data['manager']->firstname, 'email'=> $email_data['manager']->email, 'user_completed'=>$email_data['user']->firstname, 'site_name'=>$this->CI->preference->item('site_name'), 'site_url'=>base_url() ); $this->CI->user_email->send($email_data['manager']->email,'Completed the Assessment Tool','public/email_manager_complete',$data_manager); $this->CI->user_email->send($email_data['user']->email,'Completed the Assessment Tool','public/email_user_complete',$data_user); flashMsg('success','You finished the assessment successfully!'); redirect('home','location'); } } //Create New User elseif ($method == "create") { // Build $profile['user_id'] = $id; $profile['manager_id'] = $manager_id; $profile['test_complete'] = '1'; $survey['user_id'] = $id; $this->CI->db->trans_begin(); // Add user_profile details to DB $this->CI->db->insert('be_user_profiles',$profile); $this->CI->db->insert('be_survey',$survey); if ($this->CI->db->trans_status() === FALSE) { // Registration failed $this->CI->db->trans_rollback(); flashMsg('error',$this->CI->lang->line('userlib_registration_failed')); redirect('auth/register','location'); } else { // User registered $this->CI->db->trans_commit(); flashMsg('success',$this->CI->lang->line('userlib_registration_success')); redirect($this->CI->config->item('userlib_action_register'),'location'); } } } The submit function is similar, updating the db if $method == "update", and inserting if the method == "create". The problem is, when the form is submitted, it doesn't take into account the url b/c the form submits to the function "survey", which passes data to the lib function, so things are always updated, never created. *How can I pass $method to the _submit() function correctly?!*

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  • Where are the real risks in network security?

    - by Barry Brown
    Anytime a username/password authentication is used, the common wisdom is to protect the transport of that data using encryption (SSL, HTTPS, etc). But that leaves the end points potentially vulnerable. Realistically, which is at greater risk of intrusion? Transport layer: Compromised via wireless packet sniffing, malicious wiretapping, etc. Transport devices: Risks include ISPs and Internet backbone operators sniffing data. End-user device: Vulnerable to spyware, key loggers, shoulder surfing, and so forth. Remote server: Many uncontrollable vulnerabilities including malicious operators, break-ins resulting in stolen data, physically heisting servers, backups kept in insecure places, and much more. My gut reaction is that although the transport layer is relatively easy to protect via SSL, the risks in the other areas are much, much greater, especially at the end points. For example, at home my computer connects directly to my router; from there it goes straight to my ISPs routers and onto the Internet. I would estimate the risks at the transport level (both software and hardware) at low to non-existant. But what security does the server I'm connected to have? Have they been hacked into? Is the operator collecting usernames and passwords, knowing that most people use the same information at other websites? Likewise, has my computer been compromised by malware? Those seem like much greater risks. What do you think?

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  • Placing custom code in a System namespace

    - by David Brown
    Are there any best-practices that state custom code shouldn't be placed in a System namespace? Should System and its children be reserved for Microsoft code? I ask because I'm writing a class library that will be used across many projects and I'd like to keep things consistent by placing it in System.InteropServices (since it deals with P/Invoke).

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  • Is there a Novatel Wireless Modem Emulator or something similar?

    - by David Brown
    Novatel Wireless provides their NovaCore SDK for developers wishing to interface with their line of modems. I'm currently developing an open source managed wrapper for it, but I'm having difficulties with testing. I own a Novatel MiFi and have mobile broadband service through Sprint, but that can only get me so far. The device is already activated, thus I can't test the network activation features of the NovaCore SDK. There are also certain features only available for HSPA modems, which I am not able to get in my area. Is there an emulator capable of emulating a Novatel Wireless modem so that I can test my library without physical hardware and an actual data connection? If not, do you have any other suggestions that might help in this situation? I've contacted Novatel Wireless via email and their developer forum, but have not received a response. Thanks!

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  • WCF method that updates object passed in

    - by Georgia Brown
    Am I correct in thinking that if I have a WCF OperationContract takes in an object and needs to set a property on that object so the client gets the update, I need to declare it to return the object. e.g. given a datacontract: [DataContract] public class CompositeType { [DataMember] public int Key { get; set; } [DataMember] public string Something { get; set; } } this will not work with WCF: public void GetDataUsingDataContract(CompositeType composite) { composite.Key = 42; } this will work: public CompositeType GetDataUsingDataContract(CompositeType composite) { composite.Key = 42; return new CompositeType { Key = composite.Key, Something = composite.Something }; }

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  • Threading extra state through a parser in Scala

    - by Travis Brown
    I'll give you the tl;dr up front I'm trying to use the state monad transformer in Scalaz 7 to thread extra state through a parser, and I'm having trouble doing anything useful without writing a lot of t m a -> t m b versions of m a -> m b methods. An example parsing problem Suppose I have a string containing nested parentheses with digits inside them: val input = "((617)((0)(32)))" I also have a stream of fresh variable names (characters, in this case): val names = Stream('a' to 'z': _*) I want to pull a name off the top of the stream and assign it to each parenthetical expression as I parse it, and then map that name to a string representing the contents of the parentheses, with the nested parenthetical expressions (if any) replaced by their names. To make this more concrete, here's what I'd want the output to look like for the example input above: val target = Map( 'a' -> "617", 'b' -> "0", 'c' -> "32", 'd' -> "bc", 'e' -> "ad" ) There may be either a string of digits or arbitrarily many sub-expressions at a given level, but these two kinds of content won't be mixed in a single parenthetical expression. To keep things simple, we'll assume that the stream of names will never contain either duplicates or digits, and that it will always contain enough names for our input. Using parser combinators with a bit of mutable state The example above is a slightly simplified version of the parsing problem in this Stack Overflow question. I answered that question with a solution that looked roughly like this: import scala.util.parsing.combinator._ class ParenParser(names: Iterator[Char]) extends RegexParsers { def paren: Parser[List[(Char, String)]] = "(" ~> contents <~ ")" ^^ { case (s, m) => (names.next -> s) :: m } def contents: Parser[(String, List[(Char, String)])] = "\\d+".r ^^ (_ -> Nil) | rep1(paren) ^^ ( ps => ps.map(_.head._1).mkString -> ps.flatten ) def parse(s: String) = parseAll(paren, s).map(_.toMap) } It's not too bad, but I'd prefer to avoid the mutable state. What I want Haskell's Parsec library makes adding user state to a parser trivially easy: import Control.Applicative ((*>), (<$>), (<*)) import Data.Map (fromList) import Text.Parsec paren = do (s, m) <- char '(' *> contents <* char ')' h : t <- getState putState t return $ (h, s) : m where contents = flip (,) [] <$> many1 digit <|> (\ps -> (map (fst . head) ps, concat ps)) <$> many1 paren main = print $ runParser (fromList <$> paren) ['a'..'z'] "example" "((617)((0)(32)))" This is a fairly straightforward translation of my Scala parser above, but without mutable state. What I've tried I'm trying to get as close to the Parsec solution as I can using Scalaz's state monad transformer, so instead of Parser[A] I'm working with StateT[Parser, Stream[Char], A]. I have a "solution" that allows me to write the following: import scala.util.parsing.combinator._ import scalaz._, Scalaz._ object ParenParser extends ExtraStateParsers[Stream[Char]] with RegexParsers { protected implicit def monadInstance = parserMonad(this) def paren: ESP[List[(Char, String)]] = (lift("(" ) ~> contents <~ lift(")")).flatMap { case (s, m) => get.flatMap( names => put(names.tail).map(_ => (names.head -> s) :: m) ) } def contents: ESP[(String, List[(Char, String)])] = lift("\\d+".r ^^ (_ -> Nil)) | rep1(paren).map( ps => ps.map(_.head._1).mkString -> ps.flatten ) def parse(s: String, names: Stream[Char]) = parseAll(paren.eval(names), s).map(_.toMap) } This works, and it's not that much less concise than either the mutable state version or the Parsec version. But my ExtraStateParsers is ugly as sin—I don't want to try your patience more than I already have, so I won't include it here (although here's a link, if you really want it). I've had to write new versions of every Parser and Parsers method I use above for my ExtraStateParsers and ESP types (rep1, ~>, <~, and |, in case you're counting). If I had needed to use other combinators, I'd have had to write new state transformer-level versions of them as well. Is there a cleaner way to do this? I'd love to see an example of a Scalaz 7's state monad transformer being used to thread state through a parser, but Scala 6 or Haskell examples would also be useful.

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  • Thinking Sphinx - sorting by a string attribute gets out of sync when changes are made

    - by Scott Brown
    I have a "restaurants" table with a "name" column. I've defined the following index: indexes "REPLACE(UPPER(restaurants.name), 'THE ', '')", :as => :restaurant_name, :sortable => true ... because I want to sort the restaurant names without respect to the prefix "The ". My problem is that whenever one of these records is updated (in any way) the new record jumps to the top of the sort order. If another record is updated, it also jumps ahead of the rest. I end up with two lists: a list of restaurants that have been updated since the last re-indexing and a list of those that haven't. Each respective list is in alphabetical order, but I don't understand why the overall list is getting segregated this way. I do have a delayed delta index set up, and I assume the issue is related to this.

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  • Visual Studio Add in.

    - by Eric Brown - Cal
    I was looking to write/get a visual studio add in. I want to be able to write descriptive log calls at the top and bottom of a function. like this log.debug("TheClass.TheMethod(string TheStringParam ="+TheStringParam+") - in"); log.debug("TheClass.TheMethod(string TheStringParam ="+TheStringParam+") - out"); Is there an adin that does this? Is there source anywhere for an add in like Ghost Doc that does reflection(or whatever) to parse the parameters and such? Thanks, Eric-

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  • Split large text string into variable length strings without breaking words and keeping linebreaks a

    - by Frank
    I am trying to break a large string of text into several smaller strings of text and define each smaller text strings max length to be different. for example: "The quick brown fox jumped over the red fence. The blue dog dug under the fence." I would like to have code that can split this into smaller lines and have the first line have a max of 5 characters, the second line have a max of 11, and rest have a max of 20, resulting in this: Line 1: The Line 2: quick brown Line 3: fox jumped over the Line 4: red fence. Line 5: The blue dog Line 6: dug under the fence. All this in C# or MSSQL, is it possible?

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  • Castle Windsor config pointing to connectionStrings section in web.config

    - by Georgia Brown
    I want to inject a connection string into my repository but ideally, I want this connection string to be in my web.config connectionStrings section rather than in my windsor config. Is this possible? I know I can use the fluent interface and achieve this easily but my bosses want an xml config file. I also know that I can define a property and use that in my windsor config to pass the parameter in, but I have other code that reads the connectionstring from the web.config directly and do not really want two places with the same connectionString.

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  • Rails after_create callback can't access model's attributes

    - by tybro0103
    I can't access my model's attributes in the after_create callback... seems like I should be able to right? controller: @dog = Dog.new(:color => 'brown', :gender => 'male') @dog.user_id = current_user.id @dog.save model: class Dog < ActiveRecord::Base def after_create logger.debug "[DOG CREATED] color:#{color} gender:#{gender} user:#{user_id}" end end console: (all seems well) >>Dog.last =>#<Dog id: 1, color: "brown", gender: "male", user_id: 1> log: (wtf!?) ... [DOG CREATED] color: gender:male user ... Some of my attributes show up and others don't! oh no! Anyone know what I'm doing wrong? I've always been able to user after_create in such ways in the past. Note: The actual variable names and values I used were different, but the methods and code are the same.

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  • Optimizing Haskell code

    - by Masse
    I'm trying to learn Haskell and after an article in reddit about Markov text chains, I decided to implement Markov text generation first in Python and now in Haskell. However I noticed that my python implementation is way faster than the Haskell version, even Haskell is compiled to native code. I am wondering what I should do to make the Haskell code run faster and for now I believe it's so much slower because of using Data.Map instead of hashmaps, but I'm not sure I'll post the Python code and Haskell as well. With the same data, Python takes around 3 seconds and Haskell is closer to 16 seconds. It comes without saying that I'll take any constructive criticism :). import random import re import cPickle class Markov: def __init__(self, filenames): self.filenames = filenames self.cache = self.train(self.readfiles()) picklefd = open("dump", "w") cPickle.dump(self.cache, picklefd) picklefd.close() def train(self, text): splitted = re.findall(r"(\w+|[.!?',])", text) print "Total of %d splitted words" % (len(splitted)) cache = {} for i in xrange(len(splitted)-2): pair = (splitted[i], splitted[i+1]) followup = splitted[i+2] if pair in cache: if followup not in cache[pair]: cache[pair][followup] = 1 else: cache[pair][followup] += 1 else: cache[pair] = {followup: 1} return cache def readfiles(self): data = "" for filename in self.filenames: fd = open(filename) data += fd.read() fd.close() return data def concat(self, words): sentence = "" for word in words: if word in "'\",?!:;.": sentence = sentence[0:-1] + word + " " else: sentence += word + " " return sentence def pickword(self, words): temp = [(k, words[k]) for k in words] results = [] for (word, n) in temp: results.append(word) if n > 1: for i in xrange(n-1): results.append(word) return random.choice(results) def gentext(self, words): allwords = [k for k in self.cache] (first, second) = random.choice(filter(lambda (a,b): a.istitle(), [k for k in self.cache])) sentence = [first, second] while len(sentence) < words or sentence[-1] is not ".": current = (sentence[-2], sentence[-1]) if current in self.cache: followup = self.pickword(self.cache[current]) sentence.append(followup) else: print "Wasn't able to. Breaking" break print self.concat(sentence) Markov(["76.txt"]) -- module Markov ( train , fox ) where import Debug.Trace import qualified Data.Map as M import qualified System.Random as R import qualified Data.ByteString.Char8 as B type Database = M.Map (B.ByteString, B.ByteString) (M.Map B.ByteString Int) train :: [B.ByteString] -> Database train (x:y:[]) = M.empty train (x:y:z:xs) = let l = train (y:z:xs) in M.insertWith' (\new old -> M.insertWith' (+) z 1 old) (x, y) (M.singleton z 1) `seq` l main = do contents <- B.readFile "76.txt" print $ train $ B.words contents fox="The quick brown fox jumps over the brown fox who is slow jumps over the brown fox who is dead."

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  • DRUPAL probl [tid] field : in View how to link Taxonomy term to MY view (and not to taxonomy/term)

    - by davezen
    SUMMARY : I have a view where I need to replace the term link "taxonomy/term" by my view link, because the view uses arguments to find content with terms how can I put in link argument the term which is display : [term_name1] link "display_view/term_name1", [term_name2] link "display_view/term_name2" I used [tid] field to put argument in link display_view/[tid] but it only display the first term, and not the real term (for example if multiple taggs it only display the first) and put all the terms in one single link : [term_name1 term_name2] link "display_view/term_name1" so why [tid] or [tid_1] don't run ? is there another field, or do I need php ? really need help ! :) DESCRIPTION : Hello, I made a view table to display store content it display : user name, title, taxonomy term to type (book, disc...), taxonomy term for taggs (subject of objects) for example : USER | TITLE | TERM TYPE (only one) | TERM SUBJECTS (taggs) user1 | James Brown disc | disc | soul jamesbrown user2 | rolls book | book | cars rolls travel so I display different types of terms and in subjects it can have a multiple because it's taggs I use arguments so it can have display for example only store from an user, or from an taxonomy (for examples only the disc, or the disc about soul) so I can link display_view/argtermtype/argtermsubject (I separate the type and subject) MY NEED : what i want is the terms of the view don't redirect on taxonomy/term but on my view so I have to : change the link of terms in view to redirect on display_texts/all/all replace [all] with the [term] argument MY PROBLEM : I can't have the right field of terms displayed in the links of terms in fields, I : checked "Output this field as a link" put the link "display_view/[tid]" for term type and "display_view/all/[tid]" for term subjects NOT checked "Link this field to its term page" what it does : [tid] put in link FOR ALL THE LINE the SAME TERM and it put all the terms in one single link ! that's to say, it creates the links : USER | TITLE | TERM TYPE (only one) | TERM SUBJECTS (taggs) user1 | James Brown disc| [disc] display_texts/disc (ok !) | [soul jamesbrown] (BAD only one link!) display_texts/all/disc (BAD it's not the new term !) what I need : USER | TITLE | TERM TYPE (only one) | TERM SUBJECTS (taggs) user1 | James Brown disc| [disc] display_texts/disc| [soul] display_texts/all/soul [jamesbrown] display_texts/all/jamesbrown) MY QUESTION : so how can I put in argument the term which is display ? I try things like [tid_1] but doesn't work is there any list of fields somewhere ? or do i have to use php code ? how to separate link terms ? if I check "Link this field to its term page" links are separate but it replace my link by "taxonomy/term" link think's in advance for any idea !

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  • Haskell math performance

    - by Travis Brown
    I'm in the middle of porting David Blei's original C implementation of Latent Dirichlet Allocation to Haskell, and I'm trying to decide whether to leave some of the low-level stuff in C. The following function is one example—it's an approximation of the second derivative of lgamma: double trigamma(double x) { double p; int i; x=x+6; p=1/(x*x); p=(((((0.075757575757576*p-0.033333333333333)*p+0.0238095238095238) *p-0.033333333333333)*p+0.166666666666667)*p+1)/x+0.5*p; for (i=0; i<6 ;i++) { x=x-1; p=1/(x*x)+p; } return(p); } I've translated this into more or less idiomatic Haskell as follows: trigamma :: Double -> Double trigamma x = snd $ last $ take 7 $ iterate next (x' - 1, p') where x' = x + 6 p = 1 / x' ^ 2 p' = p / 2 + c / x' c = foldr1 (\a b -> (a + b * p)) [1, 1/6, -1/30, 1/42, -1/30, 5/66] next (x, p) = (x - 1, 1 / x ^ 2 + p) The problem is that when I run both through Criterion, my Haskell version is six or seven times slower (I'm compiling with -O2 on GHC 6.12.1). Some similar functions are even worse. I know practically nothing about Haskell performance, and I'm not terribly interested in digging through Core or anything like that, since I can always just call the handful of math-intensive C functions through FFI. But I'm curious about whether there's low-hanging fruit that I'm missing—some kind of extension or library or annotation that I could use to speed up this numeric stuff without making it too ugly.

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  • An unusual type signature

    - by Travis Brown
    In Monads for natural language semantics, Chung-Chieh Shan shows how monads can be used to give a nicely uniform restatement of the standard accounts of some different kinds of natural language phenomena (interrogatives, focus, intensionality, and quantification). He defines two composition operations, A_M and A'_M, that are useful for this purpose. The first is simply ap. In the powerset monad ap is non-deterministic function application, which is useful for handling the semantics of interrogatives; in the reader monad it corresponds to the usual analysis of extensional composition; etc. This makes sense. The secondary composition operation, however, has a type signature that just looks bizarre to me: (<?>) :: (Monad m) => m (m a -> b) -> m a -> m b (Shan calls it A'_M, but I'll call it <?> here.) The definition is what you'd expect from the types; it corresponds pretty closely to ap: g <?> x = g >>= \h -> return $ h x I think I can understand how this does what it's supposed to in the context of the paper (handle question-taking verbs for interrogatives, serve as intensional composition, etc.). What it does isn't terribly complicated, but it's a bit odd to see it play such a central role here, since it's not an idiom I've seen in Haskell before. Nothing useful comes up on Hoogle for either m (m a -> b) -> m a -> m b or m (a -> b) -> a -> m b. Does this look familiar to anyone from other contexts? Have you ever written this function?

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  • sIFR in Javascript news rotator?

    - by Adam Brown
    Hi everyone, I'm using sIFR on a website that is database driven and it works great. However, I have a news rotator on the home page and sIFR won't replace the text on the tile below the rotating image, so I have to create images for this each time. Example of the site is http://www.aucklandcityfc.com. Put home.asp on the end of the URL to see what it looks like trying to run sIFR by default. What I'd like to be able to do is use sIFR to replace that text as well, and then other people can add stories through the CMS. Alternatively, if there's a better rotator (or possibly a Flash application) that anyone knows of, please let me know. Thanks, Adam

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  • Legality, terms of service for performing a web crawl

    - by Berlin Brown
    I was going to crawl a site for some research I was collecting. But, apparently the terms of service is quite clear on the topic. Is it illegal to now "follow" the terms of service. And what can the site normally do? Here is an example clause in the TOS. Also, what about sites that don't provide this particular clause. Restrictions: "use any robot, spider, site search application, or other automated device, process or means to access, retrieve, scrape, or index the site" It is just research? Edit: "OK, from the standpoint of designing an efficient crawler. Should I provide some form of natural language engine to read terms of service and then abide by them."

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  • Show a taskbar item with a NativeWindow

    - by David Brown
    My application is intended to work almost entirely through a Windows 7 taskbar item with the use of thumbnails and jump lists. I know I can easily create a Form and simply hide it, but this seems like overkill. Plus, I'd like to toy around with NativeWindow as much as possible, because I've never used it before. Essentially, I have a class called RootWindow that derives from NativeWindow. I don't need a visible window at all, but simply something to process window messages and provide a taskbar item that I can attach thumbnails and jump lists to. Is there some kind of special CreateParams option I need to pass to CreateHandle? Or am I out of luck?

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