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• WithEvents LinkedList is it Impossible?

  - by serhio

  What is the optimal approach to a WithEvents Collection - VB.NET? Have you any remarks on the code bellow (skipping the Nothing verifications)? The problem is when I obtain the LinkedListNode(Of Foo) in a For Each block I can set myNode.Value = something, and here is a handlers leak... -Could I override the FooCollection's GetEnumerator in this case? -No. :( cause NotInheritable Class LinkedListNode(Of T) Class Foo Public Event SelectedChanged As EventHandler End Class Class FooCollection Inherits LinkedList(Of Foo) Public Event SelectedChanged As EventHandler Protected Overloads Sub AddFirst(ByVal item As Foo) AddHandler item.SelectedChanged, AddressOf OnSelectedChanged MyBase.AddFirst(item) End Sub Protected Overloads Sub AddLast(ByVal item As Foo) AddHandler item.SelectedChanged, AddressOf OnSelectedChanged MyBase.AddLast(item) End Sub ' ------------------- ' Protected Overloads Sub RemoveFirst() RemoveHandler MyBase.First.Value.SelectedChanged, _ AddressOf OnSelectedChanged MyBase.RemoveFirst() End Sub Protected Overloads Sub RemoveLast(ByVal item As Foo) RemoveHandler MyBase.Last.Value.SelectedChanged, _ AddressOf OnSelectedChanged MyBase.RemoveLast() End Sub ' ------------------- ' Protected Sub OnSelectedChanged(ByVal sender As Object, ByVal e As EventArgs) RaiseEvent SelectedChanged(sender, e) End Sub End Class

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• ruby on rails has_many through relationship

  - by BennyB

  Hi i'm having a little trouble with a has_many through relationship for my app and was hoping to find some help. So i've got Users & Lectures. Lectures are created by one user but then other users can then "join" the Lectures that have been created. Users have their own profile feed of the Lectures they have created & also have a feed of Lectures friends have created. This question however is not about creating a lecture but rather "Joining" a lecture that has been created already. I've created a "lecturerelationships" model & controller to handle this relationship between Lectures & the Users who have Joined (which i call "actives"). Users also then MUST "Exit" the Lecture (either by clicking "Exit" or navigating to one of the header navigation links). I'm grateful if anyone can work through some of this with me... I've got: Users.rb model Lectures.rb model Users_controller Lectures_controller then the following model lecturerelationship.rb class lecturerelationship < ActiveRecord::Base attr_accessible :active_id, :joinedlecture_id belongs_to :active, :class_name => "User" belongs_to :joinedlecture, :class_name => "Lecture" validates :active_id, :presence => true validates :joinedlecture_id, :presence => true end lecturerelationships_controller.rb class LecturerelationshipsController < ApplicationController before_filter :signed_in_user def create @lecture = Lecture.find(params[:lecturerelationship][:joinedlecture_id]) current_user.join!(@lecture) redirect_to @lecture end def destroy @lecture = Lecturerelationship.find(params[:id]).joinedlecture current_user.exit!(@user) redirect_to @user end end Lectures that have been created (by friends) show up on a users feed in the following file _activity_item.html.erb <li id="<%= activity_item.id %>"> <%= link_to gravatar_for(activity_item.user, :size => 200), activity_item.user %><br clear="all"> <%= render :partial => 'shared/join', :locals => {:activity_item => activity_item} %> <span class="title"><%= link_to activity_item.title, lecture_url(activity_item) %></span><br clear="all"> <span class="user"> Joined by <%= link_to activity_item.user.name, activity_item.user %> </span><br clear="all"> <span class="timestamp"> <%= time_ago_in_words(activity_item.created_at) %> ago. </span> <% if current_user?(activity_item.user) %> <%= link_to "delete", activity_item, :method => :delete, :confirm => "Are you sure?", :title => activity_item.content %> <% end %> </li> Then you see I link to the the 'shared/join' partial above which can be seen in the file below _join.html.erb <%= form_for(current_user.lecturerelationships.build(:joinedlecture_id => activity_item.id)) do |f| %> <div> <%= f.hidden_field :joinedlecture_id %> </div> <%= f.submit "Join", :class => "btn btn-large btn-info" %> <% end %> Some more files that might be needed: config/routes.rb SampleApp::Application.routes.draw do resources :users do member do get :following, :followers, :joined_lectures end end resources :sessions, :only => [:new, :create, :destroy] resources :lectures, :only => [:create, :destroy, :show] resources :relationships, :only => [:create, :destroy] #for users following each other resources :lecturerelationships, :only => [:create, :destroy] #users joining existing lectures So what happens is the lecture comes in my activity_feed with a Join button option at the bottom...which should create a lecturerelationship of an "active" & "joinedlecture" (which obviously are supposed to be coming from the user & lecture classes. But the error i get when i click the join button is as follows: ActiveRecord::StatementInvalid in LecturerelationshipsController#create SQLite3::ConstraintException: constraint failed: INSERT INTO "lecturerelationships" ("active_id", "created_at", "joinedlecture_id", "updated_at") VALUES (?, ?, ?, ?) Also i've included my user model (seems the error is referring to it) user.rb class User < ActiveRecord::Base attr_accessible :email, :name, :password, :password_confirmation has_secure_password has_many :lectures, :dependent => :destroy has_many :lecturerelationships, :foreign_key => "active_id", :dependent => :destroy has_many :joined_lectures, :through => :lecturerelationships, :source => :joinedlecture before_save { |user| user.email = email.downcase } before_save :create_remember_token validates :name, :presence => true, :length => { :maximum => 50 } VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i validates :email, :presence => true, :format => { :with => VALID_EMAIL_REGEX }, :uniqueness => { :case_sensitive => false } validates :password, :presence => true, :length => { :minimum => 6 } validates :password_confirmation, :presence => true def activity # This feed is for "My Activity" - basically lectures i've started Lecture.where("user_id = ?", id) end def friendactivity Lecture.from_users_followed_by(self) end # lECTURE TO USER (JOINING) RELATIONSHIPS def joined?(selected_lecture) lecturerelationships.find_by_joinedlecture_id(selected_lecture.id) end def join!(selected_lecture) lecturerelationships.create!(:joinedlecture_id => selected_lecture.id) end def exit!(selected_lecture) lecturerelationships.find_by_joinedlecture_id(selected_lecture.id).destroy end end Thanks for any and all help - i'll be on here for a while so as mentioned i'd GREATLY appreciate someone who may have the time to work through my issues with me...

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• Plotting Tweets from DB in Ruby, grouping by hour.

  - by plotti

  Hey guys I've got a couple of issues with my code. I was wondering that I am plotting the results very ineffectively, since the grouping by hour takes ages the DB is very simple it contains the tweets, created date and username. It is fed by the twitter gardenhose. Thanks for your help ! require 'rubygems' require 'sequel' require 'gnuplot' DB = Sequel.sqlite("volcano.sqlite") tweets = DB[:tweets] def get_values(keyword,tweets) my_tweets = tweets.filter(:text.like("%#{keyword}%")) r = Hash.new start = my_tweets.first[:created_at] my_tweets.each do |t| hour = ((t[:created_at]-start)/3600).round r[hour] == nil ? r[hour] = 1 : r[hour] += 1 end x = [] y = [] r.sort.each do |e| x << e[0] y << e[1] end [x,y] end keywords = ["iceland", "island", "vulkan", "volcano"] values = {} keywords.each do |k| values[k] = get_values(k,tweets) end Gnuplot.open do |gp| Gnuplot::Plot.new(gp) do |plot| plot.terminal "png" plot.output "volcano.png" plot.data = [] values.each do |k,v| plot.data << Gnuplot::DataSet.new([v[0],v[1]]){ |ds| ds.with = "linespoints" ds.title = k } end end end

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• Cannot implicitly convert type 'char*' to 'bool'

  - by neeraj

  i was trying to passing pointer value in the function , i really got stuck here I am a beginner , not getting what value should be put this is programme from the reference of the book "Cracking the coding interview " By Gayle Laakmann McDowell, class Program { unsafe void reverse(char *str) { char* end = str; char tmp; if (str) //Cannot implicitly convert type 'char*' to 'bool' { while(*end) //Cannot implicitly convert type 'char*' to 'bool' { ++end; } --end; while(str<end) { tmp = *str; *str+= *end; *end-= tmp; } } } public static void Main(string[] args) { } }

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• Different behavior for REF CURSOR between Oracle 10g and 11g when unique index present?

  - by wweicker

  Description I have an Oracle stored procedure that has been running for 7 or so years both locally on development instances and on multiple client test and production instances running Oracle 8, then 9, then 10, and recently 11. It has worked consistently until the upgrade to Oracle 11g. Basically, the procedure opens a reference cursor, updates a table then completes. In 10g the cursor will contain the expected results but in 11g the cursor will be empty. No DML or DDL changed after the upgrade to 11g. This behavior is consistent on every 10g or 11g instance I've tried (10.2.0.3, 10.2.0.4, 11.1.0.7, 11.2.0.1 - all running on Windows). The specific code is much more complicated but to explain the issue in somewhat realistic overview: I have some data in a header table and a bunch of child tables that will be output to PDF. The header table has a boolean (NUMBER(1) where 0 is false and 1 is true) column indicating whether that data has been processed yet. The view is limited to only show rows in that have not been processed (the view also joins on some other tables, makes some inline queries and function calls, etc). So at the time when the cursor is opened, the view shows one or more rows, then after the cursor is opened an update statement runs to flip the flag in the header table, a commit is issued, then the procedure completes. On 10g, the cursor opens, it contains the row, then the update statement flips the flag and running the procedure a second time would yield no data. On 11g, the cursor never contains the row, it's as if the cursor does not open until after the update statement runs. I'm concerned that something may have changed in 11g (hopefully a setting that can be configured) that might affect other procedures and other applications. What I'd like to know is whether anyone knows why the behavior is different between the two database versions and whether the issue can be resolved without code changes. Update 1: I managed to track the issue down to a unique constraint. It seems that when the unique constraint is present in 11g the issue is reproducible 100% of the time regardless of whether I'm running the real world code against the actual objects or the following simple example. Update 2: I was able to completely eliminate the view from the equation. I have updated the simple example to show the problem exists even when querying directly against the table. Simple Example CREATE TABLE tbl1 ( col1 VARCHAR2(10), col2 NUMBER(1) ); INSERT INTO tbl1 (col1, col2) VALUES ('TEST1', 0); /* View is no longer required to demonstrate the problem CREATE OR REPLACE VIEW vw1 (col1, col2) AS SELECT col1, col2 FROM tbl1 WHERE col2 = 0; */ CREATE OR REPLACE PACKAGE pkg1 AS TYPE refWEB_CURSOR IS REF CURSOR; PROCEDURE proc1 (crs OUT refWEB_CURSOR); END pkg1; CREATE OR REPLACE PACKAGE BODY pkg1 IS PROCEDURE proc1 (crs OUT refWEB_CURSOR) IS BEGIN OPEN crs FOR SELECT col1 FROM tbl1 WHERE col1 = 'TEST1' AND col2 = 0; UPDATE tbl1 SET col2 = 1 WHERE col1 = 'TEST1'; COMMIT; END proc1; END pkg1; Anonymous Block Demo DECLARE crs1 pkg1.refWEB_CURSOR; TYPE rectype1 IS RECORD ( col1 vw1.col1%TYPE ); rec1 rectype1; BEGIN pkg1.proc1 ( crs1 ); DBMS_OUTPUT.PUT_LINE('begin first test'); LOOP FETCH crs1 INTO rec1; EXIT WHEN crs1%NOTFOUND; DBMS_OUTPUT.PUT_LINE(rec1.col1); END LOOP; DBMS_OUTPUT.PUT_LINE('end first test'); END; /* After creating this index, the problem is seen */ CREATE UNIQUE INDEX unique_col1 ON tbl1 (col1); /* Reset data to initial values */ TRUNCATE TABLE tbl1; INSERT INTO tbl1 (col1, col2) VALUES ('TEST1', 0); DECLARE crs1 pkg1.refWEB_CURSOR; TYPE rectype1 IS RECORD ( col1 vw1.col1%TYPE ); rec1 rectype1; BEGIN pkg1.proc1 ( crs1 ); DBMS_OUTPUT.PUT_LINE('begin second test'); LOOP FETCH crs1 INTO rec1; EXIT WHEN crs1%NOTFOUND; DBMS_OUTPUT.PUT_LINE(rec1.col1); END LOOP; DBMS_OUTPUT.PUT_LINE('end second test'); END; Example of what the output on 10g would be:   begin first test   TEST1   end first test   begin second test   TEST1   end second test Example of what the output on 11g would be:   begin first test   TEST1   end first test   begin second test   end second test Clarification I can't remove the COMMIT because in the real world scenario the procedure is called from a web application. When the data provider on the front end calls the procedure it will issue an implicit COMMIT when disconnecting from the database anyways. So if I remove the COMMIT in the procedure then yes, the anonymous block demo would work but the real world scenario would not because the COMMIT would still happen. Question Why is 11g behaving differently? Is there anything I can do other than re-write the code?

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• Can using Chronic impair your sense of time?

  - by Trip

  Haha.. I'm using Chronic to parse the time users add in the Calendar. Where the code works and implements the right time, the end result is that, IF a user adds a time, then it has no date, and because it has no date, it will not show in results. Any ideas? def set_dates unless self.natural_date.blank? || Chronic.parse(self.natural_date).blank? # check if we are dealing with a date or a date + time if time_provided?(self.natural_date) self.date = nil self.time = Chronic.parse(self.natural_date) else self.date = Chronic.parse(self.natural_date).to_date self.time = nil end end unless self.natural_end_date.blank? || Chronic.parse(self.natural_end_date).blank? # check if we are dealing with a date or a date + time if time_provided?(self.natural_end_date) self.end_date = nil self.end_time = Chronic.parse(self.natural_end_date) else self.end_date = Chronic.parse(self.natural_end_date).to_date self.end_time = nil end end end Edit: Here is the time_provided? method: def time_provided?(natural_date_string) date_span = Chronic.parse(natural_date_string, :guess => false) (date_span.last - date_span.first).to_i == 1 end

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• php cron jobs overlapping

  - by naveen gupta

  Hi I wrote few months back a script in perl for checking overlapping of jobs use Fcntl ':flock'; INIT { my $waitcount=12; # possible attemtps to run script my $waitseconds=300; # wait for $waitseconds each attempt my $lockstatus=0;#no lock was attained while ($waitcount > 0){ if (open LH, $0){ while ($waitcount > 0){ if (flock LH, LOCK_EX|LOCK_NB){ $waitcount=0;#signal end of waiting $lockstatus=1;#lock was attained } else{ --$waitcount;#decrement waitcount print "waiting to be able to lock $0\n"; sleep $waitseconds; }#end else }#end while }#end if else{ --$waitcount;#decrement waitcount print "waiting to be able to open $0\n"; sleep $waitseconds; }#end else }#end while if ($lockstatus == 0){ die "no lock was attained\n"; }#end if } I wanted to know if we can do similar thing in php .. How to integrate with your current php code which is running a part of php jobs?

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• Writing Ruby Libraries - hiding methods from outside the module

  - by JP

  Hi all, I'm writing a Ruby library which has a module with a bunch of classes inside it. Many of these classes need to be usable and modifiable by calling scripts, but I don't want (some of) the initializers to be visible/callable: module MyLib class Control def initialize # They can use this end def do_stuff Helper.new('things') end end class Helper # Shouldn't be visible def initialize(what) @what = what end def shout @what end end end c = MyLib::Control.new h = c.do_stuff p h.shout # => "things" # ^ All of this is desired # v This is undesirable p MyLib::Helper.new('!') # => <MyLib::Helper @what='!'> If it's a simple thing, then I'd also appreciate the generated RDoc not even include the .new method for the Helper class either. Any ideas? Thanks for reading!

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• Can anyone help me with this VHDL code (currently malfunctioning)?

  - by xx77aBs

  This code should be (and is) very simple, and I don't know what I am doing wrong. Here is description of what it should do: It should display a number on one 7-segment display. That number should be increased by one every time someone presses the push button. There is also reset button which sets the number to 0. That's it. Here is VHDL code: library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL; entity PWM is Port ( cp_in : in STD_LOGIC; inc : in STD_LOGIC; rst: in std_logic; AN : out STD_LOGIC_VECTOR (3 downto 0); segments : out STD_LOGIC_VECTOR (6 downto 0)); end PWM; architecture Behavioral of PWM is signal cp: std_logic; signal CurrentPWMState: integer range 0 to 10; signal inco: std_logic; signal temp: std_logic_vector (3 downto 0); begin --cp = 100 Hz counter: entity djelitelj generic map (CountTo => 250000) port map (cp_in, cp); debounce: entity debounce port map (inc, cp, inco); temp <= conv_std_logic_vector(CurrentPWMState, 4); ss: entity decoder7seg port map (temp, segments); process (inco, rst) begin if inco = '1' then CurrentPWMState <= CurrentPWMState + 1; elsif rst='1' then CurrentPWMState <= 0; end if; end process; AN <= "1110"; end Behavioral; Entity djelitelj (the counter used to divide 50MHz clock): library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL; entity PWM is Port ( cp_in : in STD_LOGIC; inc : in STD_LOGIC; rst: in std_logic; AN : out STD_LOGIC_VECTOR (3 downto 0); segments : out STD_LOGIC_VECTOR (6 downto 0)); end PWM; architecture Behavioral of PWM is signal cp: std_logic; signal CurrentPWMState: integer range 0 to 10; signal inco: std_logic; signal temp: std_logic_vector (3 downto 0); begin --cp = 100 Hz counter: entity djelitelj generic map (CountTo => 250000) port map (cp_in, cp); debounce: entity debounce port map (inc, cp, inco); temp <= conv_std_logic_vector(CurrentPWMState, 4); ss: entity decoder7seg port map (temp, segments); process (inco, rst) begin if inco = '1' then CurrentPWMState <= CurrentPWMState + 1; elsif rst='1' then CurrentPWMState <= 0; end if; end process; AN <= "1110"; end Behavioral; Debouncing entity: library IEEE; use IEEE.STD_LOGIC_1164.all; use IEEE.STD_LOGIC_ARITH.all; use IEEE.STD_LOGIC_UNSIGNED.all; ENTITY debounce IS PORT(pb, clock_100Hz : IN STD_LOGIC; pb_debounced : OUT STD_LOGIC); END debounce; ARCHITECTURE a OF debounce IS SIGNAL SHIFT_PB : STD_LOGIC_VECTOR(3 DOWNTO 0); BEGIN -- Debounce Button: Filters out mechanical switch bounce for around 40Ms. -- Debounce clock should be approximately 10ms process begin wait until (clock_100Hz'EVENT) AND (clock_100Hz = '1'); SHIFT_PB(2 Downto 0) <= SHIFT_PB(3 Downto 1); SHIFT_PB(3) <= NOT PB; If SHIFT_PB(3 Downto 0)="0000" THEN PB_DEBOUNCED <= '1'; ELSE PB_DEBOUNCED <= '0'; End if; end process; end a; And here is BCD to 7-segment decoder: library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL; entity decoder7seg is port ( bcd: in std_logic_vector (3 downto 0); segm: out std_logic_vector (6 downto 0)); end decoder7seg; architecture Behavioral of decoder7seg is begin with bcd select segm<= "0000001" when "0000", -- 0 "1001111" when "0001", -- 1 "0010010" when "0010", -- 2 "0000110" when "0011", -- 3 "1001100" when "0100", -- 4 "0100100" when "0101", -- 5 "0100000" when "0110", -- 6 "0001111" when "0111", -- 7 "0000000" when "1000", -- 8 "0000100" when "1001", -- 9 "1111110" when others; -- just - character end Behavioral; Does anyone see where I made my mistake(s) ? I've tried that design on Spartan-3 Started board and it isn't working ... Every time I press the push button, I get crazy (random) values. The reset button is working properly. Thanks !!!!

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• How do I write a writer method for a class variable in Ruby?

  - by tepidsam

  I'm studying Ruby and my brain just froze. In the following code, how would I write the class writer method for 'self.total_people'? I'm trying to 'count' the number of instances of the class 'Person'. class Person attr_accessor :name, :age @@nationalities = ['French', 'American', 'Colombian', 'Japanese', 'Russian', 'Peruvian'] @@current_people = [] @@total_people = 0 def self.nationalities #reader @@nationalities end def self.nationalities=(array=[]) #writer @@nationalities = array end def self.current_people #reader @@current_people end def self.total_people #reader @@total_people end def self.total_people #writer #-----????? end def self.create_with_attributes(name, age) person = self.new(name) person.age = age person.name = name return person end def initialize(name="Bob", age=0) @name = name @age = age puts "A new person has been instantiated." @@total_people =+ 1 @@current_people << self end

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• User HasOne ActiveToken, HasMany Tokens, how to setup in Rails?

  - by viatropos

  I have two simple models: class User < ActiveRecord::Base has_many :tokens # has_one doesn't work, because Token already stores # foreign id to user... # has_one :active_token, :class_name => "Token" # belongs_to doesn't work because Token belongs to # User already, and they both can't belong to each other # belongs_to :active_token, :class_name => "Token" end class Token < ActiveRecord::Base belongs_to :user end I want to say "User has_one :active_token, :class_name => 'Token'", but I can't because Token already belongs_to User. What I did instead was just manually add similar functionality to the user like so: class User < ActiveRecord::Base has_many :tokens attr_accessor :active_token after_create :save_active_token before_destroy :destroy_active_token # it belongs_to, but you can't have both belongs_to each other... def active_token return nil unless self.active_token_id @active_token ||= Token.find(self.active_token_id) end def active_token=(value) self.active_token_id = value.id @active_token = value end def save_active_token self.active_token.user = self self.active_token.save end def destroy_active_token self.active_token.destroy if self.active_token end end Is there a better way?

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• Setting new class variables inside a module

  - by Sean McCleary

  I have a plugin I have been working on that adds publishing to ActiveRecord classes. I extend my classes with my publisher like so: class Note < ActiveRecord::Base # ... publishable :related_attributes => [:taggings] end My publisher is structured like: module Publisher def self.included(base) base.send(:extend, ClassMethods) @@publishing_options = [] # does not seem to be available end module ClassMethods def publishable options={} include InstanceMethods @@publishing_options = options # does not work as class_variable_set is a private method # self.class_variable_set(:@@publishing_options, options) # results in: uninitialized class variable @@publishing_options in Publisher::ClassMethods puts "@@publishing_options: #{@@publishing_options.inspect}" # ... end # ... end module InstanceMethods # results in: uninitialized class variable @@publishing_options in Publisher::InstanceMethods def related_attributes @@publishing_options[:related_attributes] end # ... end end Any ideas on how to pass options to publishable and have them available as a class variable?

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• ruby confusing -- local variable or instance_method ?

  - by boblu

  I have the following program. module C def self.included(base) base.extend(ClassMethods) end module ClassMethods def test_for class_eval <<-DEFINECLASSMETHODS def self.my_method(param_a) puts "SELF is: #{self.inspect}" puts param_a puts "#{param_a}" end DEFINECLASSMETHODS end end end class A include C end class B < A test_for end when I run B.new.my_method("aaa"), I got this error NameError: undefined local variable or method `param_a' for B:Class I am quite confused. I define param_a as a local variable in class method my_method, puts param_a runs good, and will output the "aaa". however, puts "#{param_a}" output that error. why? Can anyone explain this?

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• [MS Access 2003 SQL] Switch is causing #error, why and how can I fix it...

  - by Chris

  I have 3 fields in my table: start, end (dates) and length (number, might be blank). My Aim is to calculate an end date using start and length where end doesn't exist... I have: SELECT Switch((g.length<>0) And IsDate(g.end),DateAdd("m",g.length,g.start)) AS field FROM table g If there is no start, end or length, Access displays blank - this is fine. If there is no end, but start and length are ok, the calculated date is shown - again fine. BUT If there is no end, or length, but a start exists, access displays #Error I don't understand why, and can't fix it, please help!

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• How do I inherit abstract unit tests in Ruby?

  - by Graeme Moss

  I have two unit tests that should share a lot of common tests with slightly different setup methods. If I write something like class Abstract < Test::Unit::TestCase def setup @field = create end def test_1 ... end end class Concrete1 < Abstract def create SomeClass1.new end end class Concrete2 < Abstract def create SomeClass2.new end end then Concrete1 does not seem to inherit the tests from Abstract. Or at least I cannot get them to run in eclipse. If I choose "Run all TestCases" for the file that contains Concrete1 then Abstract is run even though I do not want it to be. If I specify Concrete1 then it does not run any tests at all! If I specify test_1 in Concrete1 then it complains it cannot find it ("uncaught throw :invalid_test (ArgumentError)"). I'm new to Ruby. What am I missing here?

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• Can EventMachine recognize all threads are completed?

  - by philipjkim

  I'm an EM newbie and writing two codes to compare synchronous and asynchronous IO. I'm using Ruby 1.8.7. The example for sync IO is: def pause_then_print(str) sleep 2 puts str end 5.times { |i| pause_then_print(i) } puts "Done" This works as expected, taking 10+ seconds until termination. On the other hand, the example for async IO is: require 'rubygems' require 'eventmachine' def pause_then_print(str) Thread.new do EM.run do sleep 2 puts str end end end EventMachine.run do EM.add_timer(2.5) do puts "Done" EM.stop_event_loop end EM.defer(proc do 5.times { |i| pause_then_print(i) } end) end 5 numbers are shown in 2.x seconds. Now I explicitly wrote code that EM event loop to be stopped after 2.5 seconds. But what I want is that the program terminates right after printing out 5 numbers. For doing that, I think EventMachine should recognize all 5 threads are done, and then stop the event loop. How can I do that? Also, please correct the async IO example if it can be more natural and expressive. Thanks in advance.

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• API Message Localization

  - by Jesse Taber

  In my post, “Keep Localizable Strings Close To Your Users” I talked about the internationalization and localization difficulties that can arise when you sprinkle static localizable strings throughout the different logical layers of an application. The main point of that post is that you should have your localizable strings reside as close to the user-facing modules of your application as possible. For example, if you’re developing an ASP .NET web forms application all of the localizable strings should be kept in .resx files that are associated with the .aspx views of the application. In this post I want to talk about how this same concept can be applied when designing and developing APIs. An API Facilitates Machine-to-Machine Interaction You can typically think about a web, desktop, or mobile application as a collection “views” or “screens” through which users interact with the underlying logic and data. The application can be designed based on the assumption that there will be a human being on the other end of the screen working the controls. You are designing a machine-to-person interaction and the application should be built in a way that facilitates the user’s clear understanding of what is going on. Dates should be be formatted in a way that the user will be familiar with, messages should be presented in the user’s preferred language, etc. When building an API, however, there are no screens and you can’t make assumptions about who or what is on the other end of each call. An API is, by definition, a machine-to-machine interaction. A machine-to-machine interaction should be built in a way that facilitates a clear and unambiguous understanding of what is going on. Dates and numbers should be formatted in predictable and standard ways (e.g. ISO 8601 dates) and messages should be presented in machine-parseable formats. For example, consider an API for a time tracking system that exposes a resource for creating a new time entry. The JSON for creating a new time entry for a user might look like: 1: { 2: "userId": 4532, 3: "startDateUtc": "2012-10-22T14:01:54.98432Z", 4: "endDateUtc": "2012-10-22T11:34:45.29321Z" 5: }   Note how the parameters for start and end date are both expressed as ISO 8601 compliant dates in UTC. Using a date format like this in our API leaves little room for ambiguity. It’s also important to note that using ISO 8601 dates is a much, much saner thing than the \/Date(<milliseconds since epoch>)\/ nonsense that is sometimes used in JSON serialization. Probably the most important thing to note about the JSON snippet above is the fact that the end date comes before the start date! The API should recognize that and disallow the time entry from being created, returning an error to the caller. You might inclined to send a response that looks something like this: 1: { 2: "errors": [ {"message" : "The end date must come after the start date"}] 3: }   While this may seem like an appropriate thing to do there are a few problems with this approach: What if there is a user somewhere on the other end of the API call that doesn’t speak English?  What if the message provided here won’t fit properly within the UI of the application that made the API call? What if the verbiage of the message isn’t consistent with the rest of the application that made the API call? What if there is no user directly on the other end of the API call (e.g. this is a batch job uploading time entries once per night unattended)? The API knows nothing about the context from which the call was made. There are steps you could take to given the API some context (e.g.allow the caller to send along a language code indicating the language that the end user speaks), but that will only get you so far. As the designer of the API you could make some assumptions about how the API will be called, but if we start making assumptions we could very easily make the wrong assumptions. In this situation it’s best to make no assumptions and simply design the API in such a way that the caller has the responsibility to convey error messages in a manner that is appropriate for the context in which the error was raised. You would work around some of these problems by allowing callers to add metadata to each request describing the context from which the call is being made (e.g. accepting a ‘locale’ parameter denoting the desired language), but that will add needless clutter and complexity. It’s better to keep the API simple and push those context-specific concerns down to the caller whenever possible. For our very simple time entry example, this can be done by simply changing our error message response to look like this: 1: { 2: "errors": [ {"code": 100}] 3: }   By changing our error error from exposing a string to a numeric code that is easily parseable by another application, we’ve placed all of the responsibility for conveying the actual meaning of the error message on the caller. It’s best to have the caller be responsible for conveying this meaning because the caller understands the context much better than the API does. Now the caller can see error code 100, know that it means that the end date submitted falls before the start date and take appropriate action. Now all of the problems listed out above are non-issues because the caller can simply translate the error code of ‘100’ into the proper action and message for the current context. The numeric code representation of the error is a much better way to facilitate the machine-to-machine interaction that the API is meant to facilitate. An API Does Have Human Users While APIs should be built for machine-to-machine interaction, people still need to wire these interactions together. As a programmer building a client application that will consume the time entry API I would find it frustrating to have to go dig through the API documentation every time I encounter a new error code (assuming the documentation exists and is accurate). The numeric error code approach hurts the discoverability of the API and makes it painful to integrate with. We can help ease this pain by merging our two approaches: 1: { 2: "errors": [ {"code": 100, "message" : "The end date must come after the start date"}] 3: }   Now we have an easily parseable numeric error code for the machine-to-machine interaction that the API is meant to facilitate and a human-readable message for programmers working with the API. The human-readable message here is not intended to be viewed by end-users of the API and as such is not really a “localizable string” in my opinion. We could opt to expose a locale parameter for all API methods and store translations for all error messages, but that’s a lot of extra effort and overhead that doesn’t add a lot real value to the API. I might be a bit of an “ugly American”, but I think it’s probably fine to have the API return English messages when the target for those messages is a programmer. When resources are limited (which they always are), I’d argue that you’re better off hard-coding these messages in English and putting more effort into building more useful features, improving security, tweaking performance, etc.

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• pound: multiple domains

  - by niklassaers

  Hi guys, I've been using pound to run mydomain.dk. Now I've bought some other domains and SSL certificates that are mydomain.no, mydomain.se and mydomain.eu. My old config looked roughly like this: ListenHTTPS Address 81.19.246.120 Port 443 Cert "/usr/local/etc/pound.keys/mydomain.dk.pem" Service BackEnd Address 10.0.10.10 Port 8080 End End End At places like here I've seen that I can use HeadRequire in the Service part, but I want the Host header to go together with the Cert, ideally something like ListenHTTPS Address 81.19.246.120 Port 443 HostAndCert "mydomain.dk" "/usr/local/etc/pound.keys/mydomain.dk.pem" HostAndCert "mydomain.se" "/usr/local/etc/pound.keys/mydomain.se.pem" HostAndCert "mydomain.no" "/usr/local/etc/pound.keys/mydomain.no.pem" HostAndCert "mydomain.eu" "/usr/local/etc/pound.keys/mydomain.eu.pem" Service BackEnd Address 10.0.10.10 Port 8080 End End End Any suggestions or clues to how I can accomplish this? Cheers Nik

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• Why would my domain admins turn of UAC?

  - by DanO

  I'm a developer of internal software in our company, I've gotten used to UAC in Win7, I prefer to run with in enabled so that our software works correctly with it enabled. Sysadmins have recently pushed out GPO that turns it off every time we log-in. (So I turn it back on every time I log in.) I can imagine some people are annoyed by it and turn it off, but is that really a good company-wide decision? anyone annoyed by it (local admins) would already have permission to turn it of themselves.. right? On the other hand we don't have to worry creating UAC friendly software if no workstations or servers have it enabled. Is there a good reason for doing this? Other than reducing help-desk calls from recent XP users? I can't see the upside of this decision, help me understand.

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• Why would my domain admins turn off UAC? [closed]

  - by DanO

  I'm a developer of internal software in our company, I've gotten used to UAC in Win7, I prefer to run with in enabled so that our software works correctly with it enabled. Sysadmins have recently pushed out GPO that turns it off every time we log-in. (So I turn it back on every time I log in.) I can imagine some people are annoyed by it and turn it off, but is that really a good company-wide decision? anyone annoyed by it (local admins) would already have permission to turn it of themselves.. right? On the other hand we don't have to worry creating UAC friendly software if no workstations or servers have it enabled. Is there a good reason for doing this? Other than reducing help-desk calls from users recently upgraded from XP? I can't see the upside of this decision, help me understand.

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• Delphi - WndProc() in thread never called

  - by Robert Oschler

  I had code that worked fine when running in the context of the main VCL thread. This code allocated it's own WndProc() in order to handle SendMessage() calls. I am now trying to move it to a background thread because I am concerned that the SendMessage() traffic is affecting the main VCL thread adversely. So I created a worker thread with the sole purpose of allocating the WndProc() in its thread Execute() method to ensure that the WndProc() existed in the thread's execution context. The WndProc() handles the SendMessage() calls as they come in. The problem is that the worker thread's WndProc() method is never triggered. Note, doExecute() is part of a template method that is called by my TThreadExtended class which is a descendant of Delphi's TThread. TThreadExtended implements the thread Execute() method and calls doExecute() in a loop. I triple-checked and doExecute() is being called repeatedly. Also note that I call PeekMessage() right after I create the WndProc() in order to make sure that Windows creates a message queue for the thread. However something I am doing is wrong since the WndProc() method is never triggered. Here's the code below: // ========= BEGIN: CLASS - TWorkerThread ======================== constructor TWorkerThread.Create; begin FWndProcHandle := 0; inherited Create(false); end; // --------------------------------------------------------------- // This call is the thread's Execute() method. procedure TWorkerThread.doExecute; var Msg: TMsg; begin // Create the WndProc() in our thread's context. if FWndProcHandle = 0 then begin FWndProcHandle := AllocateHWND(WndProc); // Call PeekMessage() to make sure we have a window queue. PeekMessage(Msg, FWndProcHandle, 0, 0, PM_NOREMOVE); end; if Self.Terminated then begin // Get rid of the WndProc(). myDeallocateHWnd(FWndProcHandle); end; // Sleep a bit to avoid hogging the CPU. Sleep(5); end; // --------------------------------------------------------------- procedure TWorkerThread.WndProc(Var Msg: TMessage); begin // THIS CODE IS NEVER CALLED. try if Msg.Msg = WM_COPYDATA then begin // Is LParam assigned? if (Msg.LParam > 0) then begin // Yes. Treat it as a copy data structure. with PCopyDataStruct(Msg.LParam)^ do begin ... // Here is where I do my work. end; end; // if Assigned(Msg.LParam) then end; // if Msg.Msg = WM_COPYDATA then finally Msg.Result := 1; end; // try() end; // --------------------------------------------------------------- procedure TWorkerThread.myDeallocateHWnd(Wnd: HWND); var Instance: Pointer; begin Instance := Pointer(GetWindowLong(Wnd, GWL_WNDPROC)); if Instance <> @DefWindowProc then begin // Restore the default windows procedure before freeing memory. SetWindowLong(Wnd, GWL_WNDPROC, Longint(@DefWindowProc)); FreeObjectInstance(Instance); end; DestroyWindow(Wnd); end; // --------------------------------------------------------------- // ========= END : CLASS - TWorkerThread ======================== Thanks, Robert

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• issue with std::advance on std::sets

  - by tim

  I've stumbled upon what I believe is a bug in the stl algorithm advance. When I'm advancing the iterator off of the end of the container, I get inconsistent results. Sometimes I get container.end(), sometimes I get the last element. I've illustrated this with the following code: #include <algorithm> #include <cstdio> #include <set> using namespace std; typedef set<int> tMap; int main(int argc, char** argv) { tMap::iterator i; tMap the_map; for (int i=0; i<10; i++) the_map.insert(i); #if EXPERIMENT==1 i = the_map.begin(); #elif EXPERIMENT==2 i = the_map.find(4); #elif EXPERIMENT==3 i = the_map.find(5); #elif EXPERIMENT==4 i = the_map.find(6); #elif EXPERIMENT==5 i = the_map.find(9); #elif EXPERIMENT==6 i = the_map.find(2000); #else i = the_map.end(); #endif advance(i, 100); if (i == the_map.end()) printf("the end\n"); else printf("wuh? %d\n", *i); return 0; } Which I get the following unexpected (according to me) behavior in experiment 3 and 5 where I get the last element instead of the_map.end(). [tim@saturn advance]$ uname -srvmpio Linux 2.6.18-1.2798.fc6 #1 SMP Mon Oct 16 14:37:32 EDT 2006 i686 athlon i386 GNU/Linux [tim@saturn advance]$ g++ --version g++ (GCC) 4.1.1 20061011 (Red Hat 4.1.1-30) Copyright (C) 2006 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. [tim@saturn advance]$ g++ -DEXPERIMENT=1 advance.cc [tim@saturn advance]$ ./a.out the end [tim@saturn advance]$ g++ -DEXPERIMENT=2 advance.cc [tim@saturn advance]$ ./a.out the end [tim@saturn advance]$ g++ -DEXPERIMENT=3 advance.cc [tim@saturn advance]$ ./a.out wuh? 9 [tim@saturn advance]$ g++ -DEXPERIMENT=4 advance.cc [tim@saturn advance]$ ./a.out the end [tim@saturn advance]$ g++ -DEXPERIMENT=5 advance.cc [tim@saturn advance]$ ./a.out wuh? 9 [tim@saturn advance]$ g++ -DEXPERIMENT=6 advance.cc [tim@saturn advance]$ ./a.out the end [tim@saturn advance]$ g++ -DEXPERIMENT=7 advance.cc [tim@saturn advance]$ ./a.out the end [tim@saturn advance]$ From the sgi website (see link at top), it has the following example: list<int> L; L.push_back(0); L.push_back(1); list<int>::iterator i = L.begin(); advance(i, 2); assert(i == L.end()); I would think that the assertion should apply to other container types, no? What am I missing? Thanks!

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• Excel Macro Runtime error 428 in Excel 2003

  - by Adam

  Hi I have created a xlt excel template which works fine in Excel 2007 under compatibility mode and shows no errors on compatibility check. The template runs a number of Macros which creates pivot tables and charts. When a colleague tries to run the same xlt on excel 2003 they get a Runtime error 428 (Object does not support this property or method). The runtime error fails at this point; ActiveWorkbook.PivotCaches.Create(SourceType:=xlDatabase, SourceData:= _ "raw!R1C1:R65536C37", Version:=xlPivotTableVersion10).CreatePivotTable _ TableDestination:="Frontpage!R7C1", TableName:="PivotTable2", _ DefaultVersion:=xlPivotTableVersion10 Any help would be appreciated. This is the full Macro; Sub Auto_Open() ' ' ImportData Macro ' Macro to import data, Data must be in your local D: Drive and named raw.csv ' ' Sheets("raw").Select With ActiveSheet.QueryTables.Add(Connection:= _ "TEXT;d:\raw.csv", Destination:=Range _ ("$A$1")) .Name = "raw_1" .FieldNames = True .RowNumbers = False .FillAdjacentFormulas = False .PreserveFormatting = True .RefreshOnFileOpen = False .RefreshStyle = xlInsertDeleteCells .SavePassword = False .SaveData = True .AdjustColumnWidth = True .RefreshPeriod = 0 .TextFilePromptOnRefresh = False .TextFilePlatform = 850 .TextFileStartRow = 1 .TextFileParseType = xlDelimited .TextFileTextQualifier = xlTextQualifierDoubleQuote .TextFileConsecutiveDelimiter = False .TextFileTabDelimiter = False .TextFileSemicolonDelimiter = False .TextFileCommaDelimiter = True .TextFileSpaceDelimiter = False .TextFileColumnDataTypes = Array(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, _ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1) .TextFileTrailingMinusNumbers = True .Refresh BackgroundQuery:=False End With ' ' AddMonthColumn Macro ' ' Sheets("raw").Select Range("AK1").Select ActiveCell.FormulaR1C1 = "Month" Range("AK2").FormulaR1C1 = "=DATE(YEAR(RC[-36]),MONTH(RC[-36]),1)" LastRow = ActiveSheet.UsedRange.Rows.Count Range("AK2").AutoFill Destination:=Range("AK2:AK" & LastRow) Columns("AK:AK").EntireColumn.AutoFit Columns("AK:AK").Select Selection.NumberFormat = "mmmm" With Selection .HorizontalAlignment = xlCenter End With Columns("AK:AK").EntireColumn.AutoFit Selection.Copy Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _ :=False, Transpose:=False ' ' Add Report Information [Text] ' Sheets("Frontpage").Select Range("A2:N2").Select Selection.Merge ActiveCell.FormulaR1C1 = "Service Activity Report" With Selection.Font .Size = 20 End With Range("A3:N3").Select Selection.Merge ActiveCell.FormulaR1C1 = InputBox("Customer Name") With Selection .HorizontalAlignment = xlCenter .VerticalAlignment = xlCenter End With Range("A4:N4").Select Selection.Merge ActiveCell.FormulaR1C1 = InputBox("Date Range dd/mm/yyyy - dd/mm/yyyy") With Selection .HorizontalAlignment = xlCenter .VerticalAlignment = xlCenter End With ' ' IncidentsbyPriority Macro ' ' Sheets("Frontpage").Select Range("A7").Select ActiveWorkbook.PivotCaches.Create(SourceType:=xlDatabase, SourceData:= _ "raw!R1C1:R65536C37", Version:=xlPivotTableVersion10).CreatePivotTable _ TableDestination:="Frontpage!R7C1", TableName:="PivotTable2", _ DefaultVersion:=xlPivotTableVersion10 Sheets("Frontpage").Select Cells(7, 1).Select ActiveSheet.Shapes.AddChart.Select ActiveChart.SetSourceData Source:=Range("Frontpage!$A$7:$H$22") ActiveChart.ChartType = xlColumnClustered With ActiveSheet.PivotTables("PivotTable2").PivotFields("Priority") .Orientation = xlRowField .Position = 1 End With ActiveSheet.PivotTables("PivotTable2").AddDataField ActiveSheet.PivotTables( _ "PivotTable2").PivotFields("Case ID"), "Count of Case ID", xlCount ActiveChart.Parent.Name = "IncidentsbyPriority" ActiveChart.ChartTitle.Text = "Incidents by Priority" Dim RngToCover As Range Dim ChtOb As ChartObject Set RngToCover = ActiveSheet.Range("D7:L16") Set ChtOb = ActiveSheet.ChartObjects("IncidentsbyPriority") ChtOb.Height = RngToCover.Height ' resize ChtOb.Width = RngToCover.Width ' resize ChtOb.Top = RngToCover.Top ' reposition ChtOb.Left = RngToCover.Left ' reposition ' ' IncidentbyMonth Macro ' ' Sheets("Frontpage").Select ActiveWorkbook.PivotCaches.Create(SourceType:=xlDatabase, SourceData:= _ "raw!R1C1:R65536C37", Version:=xlPivotTableVersion10).CreatePivotTable _ TableDestination:="Frontpage!R18C1", TableName:="PivotTable4", _ DefaultVersion:=xlPivotTableVersion10 Sheets("Frontpage").Select Cells(18, 1).Select ActiveSheet.Shapes.AddChart.Select ActiveChart.SetSourceData Source:=Range("Frontpage!$A$18:$H$38") ActiveChart.ChartType = xlColumnClustered With ActiveSheet.PivotTables("PivotTable4").PivotFields("Month") .Orientation = xlRowField .Position = 1 End With ActiveSheet.PivotTables("PivotTable4").AddDataField ActiveSheet.PivotTables( _ "PivotTable4").PivotFields("Case ID"), "Count of Case ID", xlCount ActiveChart.Parent.Name = "IncidentbyMonth" ActiveChart.ChartTitle.Text = "Incidents by Month" Dim RngToCover2 As Range Dim ChtOb2 As ChartObject Set RngToCover2 = ActiveSheet.Range("D18:L30") Set ChtOb2 = ActiveSheet.ChartObjects("IncidentbyMonth") ChtOb2.Height = RngToCover2.Height ' resize ChtOb2.Width = RngToCover2.Width ' resize ChtOb2.Top = RngToCover2.Top ' reposition ChtOb2.Left = RngToCover2.Left ' reposition ' ' IncidentbyCategory Macro ' ' Sheets("Frontpage").Select ActiveWorkbook.PivotCaches.Create(SourceType:=xlDatabase, SourceData:= _ "raw!R1C1:R65536C37", Version:=xlPivotTableVersion10).CreatePivotTable _ TableDestination:="Frontpage!R38C1", TableName:="PivotTable6", _ DefaultVersion:=xlPivotTableVersion10 Sheets("Frontpage").Select Cells(38, 1).Select ActiveSheet.Shapes.AddChart.Select ActiveChart.SetSourceData Source:=Range("Frontpage!$A$38:$H$119") ActiveChart.ChartType = xlColumnClustered With ActiveSheet.PivotTables("PivotTable6").PivotFields("Category 2") .Orientation = xlRowField .Position = 1 End With With ActiveSheet.PivotTables("PivotTable6").PivotFields("Category 3") .Orientation = xlPageField .Position = 1 End With ActiveSheet.PivotTables("PivotTable6").AddDataField ActiveSheet.PivotTables( _ "PivotTable6").PivotFields("Case ID"), "Count of Case ID", xlCount ActiveChart.Parent.Name = "IncidentbyCategory" ActiveChart.ChartTitle.Text = "Incidents by Category" Dim RngToCover3 As Range Dim ChtOb3 As ChartObject Set RngToCover3 = ActiveSheet.Range("D38:L56") Set ChtOb3 = ActiveSheet.ChartObjects("IncidentbyCategory") ChtOb3.Height = RngToCover3.Height ' resize ChtOb3.Width = RngToCover3.Width ' resize ChtOb3.Top = RngToCover3.Top ' reposition ChtOb3.Left = RngToCover3.Left ' reposition ' ' IncidentsbySiteandPriority Macro ' ' Sheets("Frontpage").Select Range("A71").Select ActiveWorkbook.PivotCaches.Create(SourceType:=xlDatabase, SourceData:= _ "raw!R1C1:R65536C37", Version:=xlPivotTableVersion10).CreatePivotTable _ TableDestination:="Frontpage!R71C1", TableName:="PivotTable3", _ DefaultVersion:=xlPivotTableVersion10 Sheets("Frontpage").Select Cells(71, 1).Select ActiveSheet.Shapes.AddChart.Select ActiveChart.SetSourceData Source:=Range("Frontpage!$A$71:$H$90") ActiveChart.ChartType = xlColumnClustered With ActiveSheet.PivotTables("PivotTable3").PivotFields("Site Name") .Orientation = xlRowField .Position = 1 End With With ActiveSheet.PivotTables("PivotTable3").PivotFields("Priority") .Orientation = xlColumnField .Position = 1 End With ActiveSheet.PivotTables("PivotTable3").AddDataField ActiveSheet.PivotTables( _ "PivotTable3").PivotFields("Case ID"), "Count of Case ID", xlCount ActiveChart.Parent.Name = "IncidentbySiteandPriority" ' ActiveChart.ChartTitle.Text = "Incidents by Site and Priority" Dim RngToCover4 As Range Dim ChtOb4 As ChartObject Set RngToCover4 = ActiveSheet.Range("H71:O91") Set ChtOb4 = ActiveSheet.ChartObjects("IncidentbySiteandPriority") ChtOb4.Height = RngToCover4.Height ' resize ChtOb4.Width = RngToCover4.Width ' resize ChtOb4.Top = RngToCover4.Top ' reposition ChtOb4.Left = RngToCover4.Left ' reposition Columns("A:G").Select Range("A52").Activate Columns("A:G").EntireColumn.AutoFit End Sub

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• SQL Select syntax error

  - by Odette

  hi guys thanks for your help yesterday. I am now trying to incorporate the query from yesterday into an existing query so I can show the highest itemcode's reporting group in the existing query..but I have a syntax error somewhere at my Select statement. ERROR: Keyword SELECT not expected. I have tried putting brackets at every possible place but still no go..can you please help? (ps-this whole query has been giving me nightmares!) WITH CALC1 AS (SELECT OTQUOT, OTIT01 AS ITEMS, ROUND(OQCQ01 * OVRC01,2) AS COST FROM @[email protected] WHERE OTIT01 < '' UNION ALL SELECT OTQUOT, OTIT02 AS ITEMS, ROUND(OQCQ02 * OVRC02,2) AS COST FROM @[email protected] WHERE OTIT02 < '' UNION ALL SELECT OTQUOT, OTIT03 AS ITEMS, ROUND(OQCQ03 * OVRC03,2) AS COST FROM @[email protected] WHERE OTIT03 < '' UNION ALL SELECT OTQUOT, OTIT04 AS ITEMS, ROUND(OQCQ04 * OVRC04,2) AS COST FROM @[email protected] WHERE OTIT04 < '' UNION ALL SELECT OTQUOT, OTIT05 AS ITEMS, ROUND(OQCQ05 * OVRC05,2) AS COST FROM @[email protected] WHERE OTIT05 < '' UNION ALL SELECT OTQUOT, OTIT06 AS ITEMS, ROUND(OQCQ06 * OVRC06,2) AS COST FROM @[email protected] WHERE OTIT06 < '' UNION ALL SELECT OTQUOT, OTIT07 AS ITEMS, ROUND(OQCQ07 * OVRC07,2) AS COST FROM @[email protected] WHERE OTIT07 < '' UNION ALL SELECT OTQUOT, OTIT08 AS ITEMS, ROUND(OQCQ08 * OVRC08,2) AS COST FROM @[email protected] WHERE OTIT08 < '' UNION ALL SELECT OTQUOT, OTIT09 AS ITEMS, ROUND(OQCQ09 * OVRC09,2) AS COST FROM @[email protected] WHERE OTIT09 < '' UNION ALL SELECT OTQUOT, OTIT10 AS ITEMS, ROUND(OQCQ10 * OVRC10,2) AS COST FROM @[email protected] WHERE OTIT10 < '' ) (SELECT OTQUOT, DESC FROM ( SELECT OTQUOT, ITEMS, B.IXRPGP AS GROUP, C.OTRDSC AS DESC, COST, ROW_NUMBER() OVER (ORDER BY COST DESC) AS RN FROM CALC1 AS A INNER JOIN @[email protected] AS B ON (A.ITEMS = B.IKITMC) INNER JOIN DATAGRP.GDSGRP AS C ON (B.IXRPGP = C.OKRPGP) ) T WHERE T.RN = 1) SELECT A.OKPBRN, A.OCAREA, A.OTCCDE, A.OTCNAM, A.OTSMAN, A.OKPBRN||A.OAPNUM AS OTQUOT, A.OTONUM, A.OTCAD1, A.OTCAD2, A.OTCAD3, A.OTPCDE, A.OTDEL1, A.OTDEL2, A.OTDEL3, CHAR(DATE(CASE WHEN SUBSTR(A.ODOQDT,5,4) = '0000' THEN '0001' ELSE SUBSTR(A.ODOQDT,5,4) END ||'-'|| CASE WHEN SUBSTR(A.ODOQDT,4,2) = '00' THEN '01' ELSE SUBSTR(A.ODOQDT,3,2) END ||'-'|| CASE WHEN SUBSTR(A.ODOQDT,1,2) = '00' THEN '01' ELSE SUBSTR(A.ODOQDT,1,2) END), ISO) AS ODOQDT_CCYYMMDD, CHAR(DATE(CASE WHEN SUBSTR(A.ODDELD,7,2) = '' THEN '0001' ELSE '20'||SUBSTR(A.ODDELD,7,2) END ||'-'|| CASE WHEN SUBSTR(A.ODDELD,4,2) = '' THEN '01' ELSE SUBSTR(A.ODDELD,4,2) END ||'-'|| CASE WHEN SUBSTR(A.ODDELD,1,2) = '' THEN '01' ELSE SUBSTR(A.ODDELD,1,2) END), ISO) AS ODDELD_CCYYMMDD, B.DESC, A.OVQTVL FROM @[email protected] AS A INNER JOIN CALC1 AS B ON (A.OKPBRN||A.OAPNUM = B.OTQUOT) WHERE A.OKPBRN = '@OKPBRN@' AND A.OTCCDE NOT LIKE '*DEP%' AND CHAR(DATE(CASE WHEN SUBSTR(A.ODOQDT,5,4) = '0000' THEN '0001' ELSE SUBSTR (A.ODOQDT,5,4) END ||'-'|| CASE WHEN SUBSTR(A.ODOQDT,4,2) = '00' THEN '01' ELSE SUBSTR(A.ODOQDT,3,2) END ||'-'|| CASE WHEN SUBSTR(A.ODOQDT,1,2) = '00' THEN '01' ELSE SUBSTR(A.ODOQDT,1,2) END), ISO) = CHAR(CURDATE() - 3 MONTH, ISO) AND A.OCQF01 = '0' AND A.OCQF02 = '0' AND A.OCQF04 = '0' AND A.OCQF05 = '0' AND A.OCQF06 = '0' AND A.OCQF07 = '0' AND A.OCQF08 = '0' AND A.OCQF09 = '0' AND A.OCQF10 = '1' AND A.OTCGRP LIKE 'S/%' ORDER BY A.OTSMAN ASC, A.OVQTVL DESC, CHAR(DATE(CASE WHEN SUBSTR(A.ODDELD,7,2) = '' THEN '0001' ELSE '20'||SUBSTR(A.ODDELD,7,2) END ||'-'|| CASE WHEN SUBSTR(A.ODDELD,4,2) = '' THEN '01' ELSE SUBSTR(A.ODDELD,4,2) END ||'-'|| CASE WHEN SUBSTR(A.ODDELD,1,2) = '' THEN '01' ELSE SUBSTR(A.ODDELD,1,2) END),ISO) ASC

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• Matlab: Optimization by perturbing variable

  - by S_H

  My main script contains following code: %# Grid and model parameters nModel=50; nModel_want=1; nI_grid1=5; Nth=1; nRow.Scale1=5; nCol.Scale1=5; nRow.Scale2=5^2; nCol.Scale2=5^2; theta = 90; % degrees a_minor = 2; % range along minor direction a_major = 5; % range along major direction sill = var(reshape(Deff_matrix_NthModel,nCell.Scale1,1)); % variance of the coarse data matrix of size nRow.Scale1 X nCol.Scale1 %# Covariance computation % Scale 1 for ihRow = 1:nRow.Scale1 for ihCol = 1:nCol.Scale1 [cov.Scale1(ihRow,ihCol),heff.Scale1(ihRow,ihCol)] = general_CovModel(theta, ihCol, ihRow, a_minor, a_major, sill, 'Exp'); end end % Scale 2 for ihRow = 1:nRow.Scale2 for ihCol = 1:nCol.Scale2 [cov.Scale2(ihRow,ihCol),heff.Scale2(ihRow,ihCol)] = general_CovModel(theta, ihCol/(nCol.Scale2/nCol.Scale1), ihRow/(nRow.Scale2/nRow.Scale1), a_minor, a_major, sill/(nRow.Scale2*nCol.Scale2), 'Exp'); end end %# Scale-up of fine scale values by averaging [covAvg.Scale2,var_covAvg.Scale2,varNorm_covAvg.Scale2] = general_AverageProperty(nRow.Scale2/nRow.Scale1,nCol.Scale2/nCol.Scale1,1,nRow.Scale1,nCol.Scale1,1,cov.Scale2,1); I am using two functions, general_CovModel() and general_AverageProperty(), in my main script which are given as following: function [cov,h_eff] = general_CovModel(theta, hx, hy, a_minor, a_major, sill, mod_type) % mod_type should be in strings angle_rad = theta*(pi/180); % theta in degrees, angle_rad in radians R_theta = [sin(angle_rad) cos(angle_rad); -cos(angle_rad) sin(angle_rad)]; h = [hx; hy]; lambda = a_minor/a_major; D_lambda = [lambda 0; 0 1]; h_2prime = D_lambda*R_theta*h; h_eff = sqrt((h_2prime(1)^2)+(h_2prime(2)^2)); if strcmp(mod_type,'Sph')==1 || strcmp(mod_type,'sph') ==1 if h_eff<=a cov = sill - sill.*(1.5*(h_eff/a_minor)-0.5*((h_eff/a_minor)^3)); else cov = sill; end elseif strcmp(mod_type,'Exp')==1 || strcmp(mod_type,'exp') ==1 cov = sill-(sill.*(1-exp(-(3*h_eff)/a_minor))); elseif strcmp(mod_type,'Gauss')==1 || strcmp(mod_type,'gauss') ==1 cov = sill-(sill.*(1-exp(-((3*h_eff)^2/(a_minor^2))))); end and function [PropertyAvg,variance_PropertyAvg,NormVariance_PropertyAvg]=... general_AverageProperty(blocksize_row,blocksize_col,blocksize_t,... nUpscaledRow,nUpscaledCol,nUpscaledT,PropertyArray,omega) % This function computes average of a property and variance of that averaged % property using power averaging PropertyAvg=zeros(nUpscaledRow,nUpscaledCol,nUpscaledT); %# Average of property for k=1:nUpscaledT, for j=1:nUpscaledCol, for i=1:nUpscaledRow, sum=0; for a=1:blocksize_row, for b=1:blocksize_col, for c=1:blocksize_t, sum=sum+(PropertyArray((i-1)*blocksize_row+a,(j-1)*blocksize_col+b,(k-1)*blocksize_t+c).^omega); % add all the property values in 'blocksize_x','blocksize_y','blocksize_t' to one variable end end end PropertyAvg(i,j,k)=(sum/(blocksize_row*blocksize_col*blocksize_t)).^(1/omega); % take average of the summed property end end end %# Variance of averageed property variance_PropertyAvg=var(reshape(PropertyAvg,... nUpscaledRow*nUpscaledCol*nUpscaledT,1),1,1); %# Normalized variance of averageed property NormVariance_PropertyAvg=variance_PropertyAvg./(var(reshape(... PropertyArray,numel(PropertyArray),1),1,1)); Question: Using Matlab, I would like to optimize covAvg.Scale2 such that it matches closely with cov.Scale1 by perturbing/varying any (or all) of the following variables 1) a_minor 2) a_major 3) theta Thanks.

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