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Append an object to a list in R in amortized constant time, O(1)?
...oldlist, list(someobj))
In general, R types can make it hard to have one and just one idiom for all types and uses.
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Visual Studio (2008) 'Clean Solution' Option
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It deletes all the compiled and temporary files associated with a solution. It ensures that the next build is a full one, rather than only changed files being recompiled.
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How to find the lowest common ancestor of two nodes in any binary tree?
... a list containing the path from root to the node by starting at the node, and front inserting the parent.
So for 8 in your example, you get (showing steps): {4}, {2, 4}, {1, 2, 4}
Do the same for your other node in question, resulting in (steps not shown): {1, 2}
Now compare the two lists you m...
jQuery textbox change event doesn't fire until textbox loses focus?
...out it, you should also bind to mouseup to cater for dragging text around, and add a lastValue variable to ensure that the text actually did change:
var lastValue = '';
$("#textbox").on('change keyup paste mouseup', function() {
if ($(this).val() != lastValue) {
lastValue = $(this).val...
Undefined reference to `pow' and `floor'
...calculator in C but when compiling gcc tells me that I'm missing the pow and floor functions. What's wrong?
6 Answers
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How to run iPhone emulator WITHOUT starting Xcode?
On my old Mac running Snow Leopard, I could type "ios" into spotlight and it would start up the iPhone/iPad emulator by itself.
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How to delete a row by reference in data.table?
...estion. data.table can't delete rows by reference yet.
data.table can add and delete columns by reference since it over-allocates the vector of column pointers, as you know. The plan is to do something similar for rows and allow fast insert and delete. A row delete would use memmove in C to budge u...
Tablix: Repeat header rows on each page not working - Report Builder 3.0
...porting Services does not recognize which textboxes are the column headers and setting RepeatColumnHeaders property to True doesn't work.
Instead, you need to:
Open Advanced Mode in the Groupings pane. (Click the arrow to the right of the Column Groups and select Advanced Mode.)
In the Row Gr...
Naming threads and thread-pools of ExecutorService
...ctory threadFactory). The factory will be responsibe for creating threads, and will be able to name them.
To quote the Javadoc:
Creating new threads
New threads are created using a ThreadFactory. If not otherwise specified, a Executors.defaultThreadFactory() is used, that creates threads to all be ...
Is cout synchronized/thread-safe?
...ate locking. However, do things like cout get special treatment in the standard library?
4 Answers
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