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  • Haskell Binary Tree Function (map)

    - by Bizarro
    How can i define a Haskell function which will apply a function to every value in a binary tree? So i know that it is similar to the map function - and that its type would be: mapT :: (a - b) - Tree a - Tree b but thats about it...

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  • spring component scan for classes

    - by awk
    I want to scan all the classes in a package that that are subclasses of the particular class. Then I want to take these classes and for each of them instantiate a bean of same type, using the class as a property. Then I want to gather all these anonymous beans and put them into collection. Is it possible to configure spring context in XML like this? Thx

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  • MS Access-VBA _ Save a Report to Hard Drive

    - by ledge16
    Hi all, need some help with this code if anyone can answer. Any suggestions are most appreciated. I have a report that I want to save to my hard drive when clicking a button. When saving the report I want the filename to be created using two pieces of information from the report. Variables: Report = "Contract" Save Location = "C:\Folder\" File Name = [Customer] & " _ " & [Date] File Type = PDF Thank you!

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  • filtering problem in LINQ

    - by ognjenb
    var query = from d in testPersons.person where d.Name == txtbox select d; txtbox is text box on View page. How change this code to return all names who starts with any part of name? For example:when I type R in text box, on View page, this query should return all names who is start with character R

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  • input box gets cleared on refresh page : javascript

    - by p p
    Hi, I have a javascript function that writes the value of input box to a cookie, then it tells the page to refresh. The page must be refreshed to the server side can reconstruct the page based on the values of the cookies. Output the correct data on the page. However I do not want the user to lose the value they type on the input box unless they erase it. what can i do?

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  • What Are Collections Implemented As In VB6?

    - by Tom Tresansky
    So a collection in VB6 keeps track of a key for each object, and you can look up the object by its key. Does that mean collections are implemented as some sort of hashtable under the hood? I realize you can have multiple items with the same key in a collection, hence the SOME SORT. Anybody know what type data structure a VB6 collection is supposed to represent?

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  • how to get category value from xml params?

    - by C-link Nepal
    I have the following field in xml: <field name="cat1" type="category" extension="COM_CONTENT" label="MOD_ITEM_CAT1" description="MOD_ITEM_CAT_DESC" /> Now, I wanted to get selected value: echo $params->get('cat1'); Which shows me 8 (the value of selected option) not it's title. I've category title people and it should show people instead of 8. So, how to extract the title of the category?

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  • Define and send a JSON object array

    - by Eric
    I'm looking for a way to define and send a JSON object array. I've figured out how to define a single JSON object, turn it into a string and send it, but what about an array of this type? Probably something simple I'm overlooking... var myColumnSetting = { "ColumnName": name, "ColumnIndex": index } convert it to a string var myJSONText = JSON.stringify(myColumnSetting, false);

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  • How can I have a Foo* iterator to a vector of Foo?

    - by mghie
    If I have a class that contains a std::list<Foo>, how can I implement iterators to a Foo* collection, preferably without using boost? I'd rather not maintain a parallel collection of pointers. For now I have std::list<Foo>, mostly so that removing or inserting an element does not invalidate all other iterators, but would it be possible to implement other iterators too, so that the collection type used in the implementation is opaque to the user of the class?

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  • Setting the value of textboxes with one of their attributes (jQuery)

    - by Jimbo
    I have a bunch of input text boxes that have the attribute ORIGINAL set to their initial value, so that when the user changes the textbox value, jQuery can highlight items that have changed (by comparing the text box's current value to the ORIGINAL attribute's value) What Im trying to do now is provide the user with a button that they can click to revert all text boxes back to their original values based on the value of the ORIGINAL attribute of each text box. Example $('input[type=text]').val($(this).attr('original')); The above doesnt work and I dont understand why.

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  • Passing template into boost function

    - by Ockonal
    template <class EventType> class IEvent; class IEventable; typedef boost::function<void (IEventable&, IEvent&)> behaviorRef; What is the right way for passing template class IEvent into boost function? With this code I get: error: functional cast expression list treated as compound expression error: template argument 1 is invalid error: invalid type in declaration before ‘;’ token

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  • Struts formbean problem

    - by xain
    Hi, I have a struts app with a jsp with the code: ... ... <input name="inrofol" class="inputfilter" id="inrofol" size="22" maxlength="20" type="text"> ... And even though it's not linked to the associated form bean, I get the exception Error 500: No getter method for property: "inrofol" of bean: "com.test.forms.CompForm" Any hints ? Thanks

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  • Count # of links programmatically

    - by Duber
    You know how if you type links: "yourwebsite.com" into the normal google search box, it tells you the number of sites linking to you and their addresses. How can I do it programmatically with php? Does google provide an api that can I can programmatically query? What are my options?

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  • Javascript to change image form submit button src not working.

    - by james
    I'm trying to change the src of an image form submit button using an onclick, but it doesn't seem to be working correctly. Am I missing something? <input class="submit_image" id="my_form_button" onclick="$('my_form_button').src='/images/buttons/submitting.gif'" src="/images/buttons/submit.gif" type="image" /> I've also tried using the same JS on the form tag using onsubmit with no luck.

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  • Changing a select input to a checkbox acting as an on/off toggle switch in Rails

    - by Ribena
    I have a set of 7 dropdown inputs allowing admins to say whether they are open or closed for business on a given day. I'd like that changed to 7 open/closed switches (presumably styled checkboxes?) but can't figure out how to do this! Here are the relevant bits of code I currently have (prior to any change): app/view/backend/inventory_pool/edit.html.haml - content_for :title, @inventory_pool = form_for [:backend, @inventory_pool], html: {name: "form"} do |f| .content - if is_admin? %a.button{:href => root_path}= _("Cancel") %button.button{:type => :submit}= _("Save %s") % _("Inventory Pool") %section %h2= _("Basic Information") .inner .field.text .key %h3= "#{_("Print Contracts")}" %p.description .value .input %input{type: "checkbox", name: "inventory_pool[print_contracts]", checked: @inventory_pool.print_contracts} %section#workdays %h2= _("Workdays") .inner - [1,2,3,4,5,6,0].each do |i| .field.text .key %h3= "#{I18n.t('date.day_names')[i]}" .value .input %select{:name => "store[workday_attributes][workdays][]"} %option{:label => _("Open"), :value => Workday::WORKDAYS[i]}= _("Open") %option{:label => _("Closed"), :value => "", :selected => @store.workday.closed_days.include?(i) ? true : nil}= _("Closed") app/models/workday.rb class Workday < ActiveRecord::Base belongs_to :inventory_pool WORKDAYS = ["sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday"] def is_open_on?(date) return false if date.nil? case date.wday when 1 return monday when 2 return tuesday when 3 return wednesday when 4 return thursday when 5 return friday when 6 return saturday when 0 return sunday else return false #Should not be reached end end def closed_days days = [] days << 0 unless sunday days << 1 unless monday days << 2 unless tuesday days << 3 unless wednesday days << 4 unless thursday days << 5 unless friday days << 6 unless saturday days end def workdays=(wdays) WORKDAYS.each {|workday| write_attribute(workday, wdays.include?(workday) ? true : false)} end end And in app/controllers/backend/inventory_pools_controller I have this (abridged): def update @inventory_pool ||= InventoryPool.find(params[:id]) process_params params[:inventory_pool] end def process_params ip ip[:print_contracts] ||= "false" # unchecked checkboxes are *not* being sent ip[:workday_attributes][:workdays].delete "" if ip[:workday_attributes] end

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  • How to retrieve from two tables with same foreign key repeated more than once?

    - by Sarenya
    How to display the data of tables that are linked by a primary key and foreign key where the foreign key of the data repeats? For ex. I have two tables, ParentTable and Childtable. The primary key of ParentTable acts as the foreign key of ChildTable. There are more than one record with same ParentId in ChildTable. How to retrieve them and display in a single Grid or List or any type of view?

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  • What are the standard practices for throwing JavasScript Exceptions?

    - by T.R.
    w3schools says that exceptions can be strings, integers, booleans, or objects, but the example given doesn't strike me as good practice, since exception type checking is done through string comparison. Is this the preferred method of exception handling in JavaScript? Are there built-in exception types (like NullPointerException)? (if so, what are they, what kind of inheritance do they use, and are they preferred over other options?)

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