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Find kth smallest element in a binary search tree in Optimum way
...he number of elements in the left subtree, to decide whether to do recurse into the left or right subtree.
Now, suppose we are at node T:
If k == num_elements(left subtree of T), then the answer we're looking for is the value in node T.
If k > num_elements(left subtree of T), then obviously we...
Setting Short Value Java
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In Java, integer literals are of type int by default. For some other types, you may suffix the literal with a case-insensitive letter like L, D, F to specify a long, double, or float, respectively. Note it is common practice to use up...
How to add a button dynamically in Android?
...
try this:
for (int i = 1; i <= 20; i++) {
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
Button btn = new...
What is the difference between atomic / volatile / synchronized?
How do atomic / volatile / synchronized work internally?
7 Answers
7
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Is it better to call ToList() or ToArray() in LINQ queries?
I often run into the case where I want to eval a query right where I declare it. This is usually because I need to iterate over it multiple times and it is expensive to compute. For example:
...
Is there a performance difference between a for loop and a for-each loop?
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From Item 46 in Effective Java by Joshua Bloch :
The for-each loop, introduced in
release 1.5, gets rid of the clutter
and the opportunity for error by
hiding the iterator or index variable
completely. The resulting idiom
applies equally to collections and
arrays:
// The preferre...
Connect to Amazon EC2 file directory using Filezilla and SFTP
...m file and select it.
A message box will appear asking your permission to convert the file into ppk format. Click Yes, then give the file a name and store it somewhere.
If the new file is shown in the list of Keyfiles, then continue to the next step. If not, then click "Add keyfile..." and select ...
A definitive guide to API-breaking changes in .NET
...)
API before change
public static class Foo
{
public static void bar(int i);
}
API after change
public static class Foo
{
public static bool bar(int i);
}
Sample client code working before change
Foo.bar(13);
...
Counting inversions in an array
...cult time seeing how I can use this to find the number of inversions. Any hints or help would be greatly appreciated.
36 An...
Fixing the order of facets in ggplot
...plyr pipe chain. You sort the data in advance, and then using mutate_at to convert to a factor. I've modified the data slightly to show how this solution can be applied generally, given data that can be sensibly sorted:
# the data
temp <- data.frame(type=rep(c("T", "F", "P"), 4),
...