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  • How to get this to compile?

    - by ShaChris23
    I have this code which compiles and works as expected: class Right {}; class Left { public: Left& operator = (Right const&) { //... Do something ... return *this; } }; int main() { Right right; Left left; // Assign individual object -- this works left = right; } But now, this one surprises me, I thought the template would work itself out since I already provided the = operator() to the Left class. int main() { ... std::list<Right> rightLst; std::list<Left> leftLst; // Assign a list of objects -- this doesn't compile leftLst = rightLst; } What can I do so that I could convert the rightLst to leftLst conversion in a single line?

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  • WPF Binding not updating when binded object is updated

    - by Chris Klepeis
    I'm trying to bind to a custom control like so: <my:GanttChartTaskListView Name="ganttChartTaskListView1" ItemsSource="{Binding Source={x:Static local:TaskCollection.taskList}}" /> In my WPF Window constructor I add add an item to my taskList, when it loads I can see that item in my custom control, however, when I subsequently add items it does not update. I tried setting Mode=TwoWay, however, then it says the "Path" is required and I'm not familiar with binding like that (this is new to me). Here is my TaskCollection class: namespace ProjectManager { public static class TaskCollection { private static List<TaskItem> _taskList = new List<TaskItem>(); public static List<TaskItem> taskList { get {return _taskList; } set { _taskList = value; } } } } Any ideas? Is there a better / easier way to do this?

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  • Initialize generic object from a System.Type

    - by CaptnCraig
    I need to create a generic type, but I do not know the type at compile time. I would like to do this: Type t = typeof(whatever); var list = new List<t> this won't compile, because t is not a valid type. But it does know all about a valid type. Is there a way to dynamically create the generic list from a System.Type like this? I may need reflection, and that's ok, I am just a bit lost here.

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  • Dijit Combobox filter autocomplete

    - by Apps
    I'm using dijit combobox for populating a JSON List. Also I'm using ItemFileReadStore for getting the JSON data from the server. Once the data is downloaded, when I click on the combobox it shows all the data. But I don't want the user to see all the data. The user should see the list only when he types something. I tried using queryExpr parameter-${0}*. But at that time the list is not populated.Can someone please help me to fix it? Any help will be greatly appreciated Thanks, Apps

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  • Trouble with a sequential search algorithm

    - by shinjuo
    I need to use this sequential search algorithm, but I am not really sure how. I need to use it with an array. Can someone point me in the correct direction or something on how to use this. bool seqSearch (int list[], int last, int target, int* locn){ int looker; looker = 0; while(looker < last && target != list[looker]){ looker++; } *locn = looker; return(target == list[looker]); }

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  • Sort each standalone line alphabetically

    - by Daniel
    I want to sort some items in alphabetic order, but in a very specifc way. I have, for example, the following list, each item separated by comma: monkeys, dogs, cats pineapple, banana, orange yellow, red, blue, green silver, gold, platinum delphi, java, c++, visual basic I want to sort each line alphabetically, WITHOUT changing line order. My desired result would be: cats, dogs, monkeys banana, orange, pineapple blue, green, red, yellow gold, platinum, silver c++, delphi, java, visual basic My target list has got 3000+ lines, so it should be an automated process. Thanks!

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  • how is a macro expanded in clojure?

    - by john wang
    In the book Programming Clojure(Stuart), when read how macros are expanded I got confused. user=> (defmacro chain ([x form] (list '. x form)) ([x form & more] (concat (list 'chain (list '. x form)) more))) #'user/chain The above macro can be expanded as: user=> (macroexpand '(chain a b c)) (. (. a b) c) But the following is only expanded to the first level: user=> (macroexpand '(and a b c)) (let* [and__3822__auto__ a] (if and__3822__auto__ (clojure.core/and b c) and__3822__auto__)) The and macro source: user=> (source and) (defmacro and([] true) ([x] x) ([x & next] `(let [and# ~x] (if and# (and ~@next) and#)))) Why is the chain macro expanded all the way but the and not ? Why is it not expanded to something like the following: user=> (macroexpand '(chain a b c d)) (. (chain a b c) d)

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  • Disambiguating Named Entities in Java

    - by Alterscape
    I have a list of strings (company names, in this case), and a Java program that extracts a list of things that look like company names out of mostly-unstructured text. I need to match each element of extracted text to a string in the list. Caveat: the unstructured text has typos, things like "Blah, Inc." referred to as "Blah," etc. I've tried Levenshtein Edit Distance, but that fails for predictable reasons. Are there known best-practices ways of tackling this problem? Or am I back to manual data-entry?

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  • Overriding the default error message for a ModelForm

    - by Jude Osborn
    Is there any way to override a error_message text for all the fields of a ModelForm's, without having to include all the field info in the ModelForm? For example, let's say I have a (very simple) model like this: People(models.Model): name = models.CharField(max_length=128, null=True, blank=True, help_text="Please type your name.") age = models.IntegerField(help_text="Please type your age.") I don't like the cut and dry default messages, such as, "Enter a whole number.", so I'd like to change them to something a bit nicer like "Please type a number." Ideally I'd be able to add an "error_message" property in the model, but the model does not support that property. So does that mean I have to basically duplicate all the model info in my ModelForm, or is there a way around that?

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  • How to vertically align an inline image with inline text following it?

    - by amn
    Is there any way to vertically align an image element generated by a "content" property as part of a ":before" selector, next to adjacent inline text? In other words, I have <a href="..." class="facebook">Share on Facebook</a> As I don't want to pollute my markup with unnecessary IMG elements that only have to do with style, I resort to adding a small icon to the left of the link, via CSS (except that it does not align properly, hence the question): a.facebook:before { content: url(/style/facebook-logo.png); } I tried adding a "vertical-align: middle" (one of the most notoriously difficult aligning concepts to grasp in CSS, in my opinion, is that very property) but it has no effect. The logo aligns with text baseline, and I don't want to hardcode pixel offsets, because frankly text size differs from browser to browser, etc. Is there any solution for this? Thanks.

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  • Localizing a plist with grouped data

    - by Robert Altman
    Is there a way to localize a plist that contain hierarchical or grouped data? For instance, if the plist contains: Book 1 (dictionary) Key (string) Name (string) Description (localizable string) Book 2 (dictionary) Key (string) Name (string) Description (localizable string) (etcetera...) For the sake of the example, the Key and Name should not be translated (and preferably should not be duplicated in multiple localized property lists). Is there a mechanism for providing localizations for the localizable Description field without localizing the entire property list? The only other strategy that came to my mind is to store a lookup key in the description field and than use that to retrieve the localized text via NSLocalizedString(...) Thanks.

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  • What other Freemarker JSP Tag libraries are out-there?

    - by Mat Banik
    I have been using Freemarker for a while and found displaytag library very useful. I just wondering if there are any other libraries that could be used in similar means as displaytag, which have been very helpful to you in development: FTL page <#assign display=JspTaglibs["/WEB-INF/tlds/displaytag.tld"]/> <@display.table uid="items" name="items" pagesize=10 class="table"> <@display.column title="Category" property="category.name"/> <@display.column title="Delivery" property="delivery"/> </@display.table> Example of usage would be appreciated since most of the JSP tag libs don't have them.

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  • What are some useful SQL statements / usage patterns that should be known by all developers who may

    - by Jian Lin
    What are some useful SQL statements that should be known by all developers who may touch the Back end side of the project? (Update: just like in algorithm, we know there are sorting problems, shuffling problems, and we know some solutions to them. This question is aiming at the same thing). For example, ones I can think of are: Get a list of Employees and their boss. Or one with the employee's salary greater than the boss. (Self-join) Get a list of the most popular Classes registered by students, from the greatest number to the smallest. (Count, group by, order by) Get a list of Classes that are not registered by any students. (Outer join and check whether the match is NULL, or by Get from Classes table, all ClassIDs which are NOT IN (a subquery to get all ClassIDs from the Registrations table)) Are there some SQL statements that should be under the sleeve of all developers that might touch back end data?

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  • Confusions with CSS and JavaScript relations ?

    - by Anil Namde
    I have table cell which has class "cellActive". Which has following defination .cellActive{background:"#DDDDDD"} Now i am trying to read the background color property for the cell and it comes null/"". var bgColor = cell.style.backgroundColor; // returning "" Is that something mistake on my part of its by behavior. If CSS class is assigning CSS to element can't we read its value in JS ? Does this mean that if we are not assigning property directly to the element we cant get it if in case its inheriting it ?

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  • Storing an arbitrary R object onto HDD?

    - by Harokitty
    I understand that we can export data matrices to csv or xlsx files. What about complex objects like lm? For example, in my work I might have a list of length 1000, each with a single lm() object. Each time I load R I have to wait a long time to populate the 1000 length list with these lm objects with a for loop or a lapply. I would rather just save the list somewhere on my HDD at the end of a session and open it at the start of the next session.

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  • Wix Installer - How to customize FatalError dialog based on server actions

    - by Paul
    I need to display different messages in the FatalError dialog depending on what caused the installation to fail. My first attempt was to make the FatalError description text point to a property, and then set this property's value when an error appeared. The problem is that this dialog runs in the InstallUISequence table and the problematic actions in the InstallExecuteSequence table, and apparently the values that are set during InstallExecuteSequence are not copied back to the UI, and thus I'm losing them when the dialog is created. Any ideas on how to solve this? Thanks!

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  • Extension method question. Why do I need to use someObj = someObj.somemethod();

    - by Kettenbach
    Hi All, I have a simple extension method that I would like to use to add an item to an array of items. public static T[] addElement<T>(this T[] array, T elementToAdd) { var list = new List<T>(array) {elementToAdd}; return list.ToArray(); } this works ok, but when I use it, I am having to set the array equal to the return value. I see that I am returning an Array. I likely want this method to be void, but I would like the item added. Does anyone have any ideas on what I need to do , to make this work the way I am wanting? Instead of someArray = someArray.addElement(item), I just want to do someArray.addElement(item) and then someArray be ready to go. What am I missing here? Thanks, ~ck in San Diego

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  • Memory leak with ContextMenuStrip

    - by Dave
    I'm creating a lot of custom controls and adding them to a FlowLayoutPanel. There is also a ContextMenuStrip created and populated at design time. Every time a control is added to the panel it has its ContextMenuStrip property assigned to this menu, so that all controls "share" the same menu. But I noticed when the controls are removed from the panel and disposed of, the memory in use in Task Manager doesn't drop. It rises around 50kB every time a control is created and added to the layout panel. I downloaded the trial of .NET Memory Profiler and it showed there were references to the menu strip hanging around after the controls were disposed. I changed the code to explicitly set the ContextMenuStrip property to null before disposing of the control, and yep, the memory is now released. Why is this? Shouldn't the GC clean up this type of thing?

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  • Custom nib UITableViewCell height

    - by Chuck
    I've created a custom UITableViewCell in IB, linked it to the root view controller's property for it, and set it up in CellForRowAtIndexPath. But the height of my drawn cells doesn't match what I setup in IB, advice? Here's some screenshots and the code. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *AddressCellIdentifier = @"AddressCellIdent"; UITableViewCell *thisCell = [tableView dequeueReusableCellWithIdentifier:AddressCellIdentifier]; if (thisCell == nil) { [[NSBundle mainBundle] loadNibNamed:@"AddressCell" owner:self options:nil]; thisCell = addressCell; self.addressCell = nil; } return thisCell ; } addressCell is a @property (nonatomic, assign) IBOutlet UITableViewCell *addressCell;, and is linked up in IB to the file's owner (the table view controller). I'm using the example from Apple's table view programming guide.

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  • Nhibernate Complex Type binding

    - by user329983
    I have two oracle user defined types: Audit_Type – A normal object with two fields a string and a number Audit_Table_Type – A table of audit_types, (an array) I have a stored procedure that takes as a parameter an Audit_Table_Type. List<Audit_Type> table = new List<Audit_Type>(); var query = session.CreateSQLQuery("call Audit_Rows(Audit_Table_Type(:table))") .SetParameterList("table", table, NHibernateUtil.Custom(typeof(AuditTypeUDT))) This is what I did intuativly created the ICompositeType and just set in a list of them in but this gives me nothing close to what I wanted. I couldn’t figure out how to bind to a table at all. I have built the inline sql that would do this for me but it would destroy my shared pool (not using binds). So a General question how do I bind to complex/composite types using Nhibernate?

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  • Assign multiple css classes to a table element in Rails

    - by Eric K
    I'm trying to style a table row using both cycle and a helper, like shown: <tr class= <%= cycle("list-line-odd #{row_class(item)}", "list-line-even #{row_class(item)}")%> > However, when I do this, the resulting HTML is: <tr class = "list-line-odd" lowest-price> with the return from the helper method not enclosed in the quotes, and therefore not recognized. Here's the helper I'm using: def row_class(item) if item.highest_price > 0 and item.lowest_price > 0 and item.highest_price != item.lowest_price if item.current_price >= item.highest_price "highest-price" elsif item.current_price <= item.lowest_price "lowest-price" end end end I must be missing something obvious, but I just can't figure out how to wrap both the result of cycle and the helper method return in the same set of quotes. Any help would be greatly appreciated!

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  • Is there a way to conditionally cooy a file using ant?

    - by braveterry
    I have the following target: <target name="promptforchoice"> <input addproperty="choice"> Copy the file?. [Y, n] </input> <condition property="copy.file"> <or> <equals arg1="Y" arg2="${choice}"/> <equals arg1="y" arg2="${choice}"/> </or> </condition> </target> In another target, I'd like to conditionally copy a file depending on whether or not the copy.file property is set. Is this possible? Is there some other way to accomplish it?

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