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ReadOnlyCollection or IEnumerable for exposing member collections?

...y of other options for wrapping trivially - the nice thing about Skip over Select/Where is that there's no delegate to execute pointlessly for each iteration.) If you're not using .NET 3.5 you can write a very simple wrapper to do the same thing: public static IEnumerable<T> Wrapper<T>...
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How can I provide multiple conditions for data trigger in WPF?

...he user picks a wrong answer it becomes disabled (dimmed out and cannot be selected again). An automated agent has the ability to focus on any particular choice to give an explanation (border highlighted). When the agent focuses on an item, it should not be dimmed out even if it is disabled. All ite...
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Callback functions in C++

... for jumping, the engine can call game_core_instance.update_keybind(newly_selected_key, &player_jump); and thus change the behaviour of a call to key_pressed (which the calls player_jump) once this button is pressed the next time ingame. What are callables in C++(11)? See C++ concepts: Call...
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What's the difference between => , ()=>, and Unit=>

... Four years later and I realize that the answer I selected only answered the question in the title, not the one I actually had (which this one does answer). – Malvolio Apr 11 '15 at 7:14 ...
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Call a Server-side Method on a Resource in a RESTful Way

...the output of a POST-activated script to redirect the user agent to a selected resource. If the task is asynchronous, a bark subresource is needed just like the 1.2 situation and the 303 should be returned at a GET .../barks/Y when the task is complete. 3. bark creates a new "bark" record ...
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What are the underlying data structures used for Redis?

...m-ish unique users") or with replacement ("give me 7 cards, but after each selection, put the card back so it can potentially be sampled again"). For all possible operations on sets, see the sets docs. Sorted Sets Redis sorted sets are sets with a user-defined ordering. For simplicity, you can think...
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File I/O in Every Programming Language [closed]

...ol compiler ENVIRONMENT DIVISION. INPUT-OUTPUT SECTION. FILE-CONTROL. SELECT StudentFile ASSIGN TO "STUDENTS.DAT" ORGANIZATION IS LINE SEQUENTIAL. DATA DIVISION. FILE SECTION. FD TestFile. 01 TestData. 02 LineNum PIC X. 02 LineText PIC X(72). PROCEDURE DIVISION. B...
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When to use volatile with multi threading?

... There's no mechanism for a release store to only flush itself and a few select address-ranges: it would have to sync everything because it wouldn't know what other threads might want to read if their acquire-load saw this release-store (forming a release-sequence that establishes a happens-before...
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When to use , tag files, composite components and/or custom components?

...ent which represents a single java.util.Date property by 3 dependent <h:selectOneMenu> components, or a component which combines <p:fileUpload> and <p:imageCropper> into a single <my:uploadAndCropImage> referring a single custom com.example.Image entity as property. Examples:...
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How do I replace NA values with zeros in an R dataframe?

... mutate(myCol1 = if_else(is.na(myCol1), 0, myCol1)) Note: This works per selected column, if we need to do this for all column, see @reidjax's answer using mutate_each. share | improve this answer...