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Beyond Stack Sampling: C++ Profilers
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I asked this question Linux time sample based profiler. OProfile is supposed the get time based sampling eventually. They produce very high quality output, so once they add that feature I'll use them. Other than that I had a friend hack together a gdb + backtrace...
Getting only Month and Year from SQL DATE
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FROM
<your_table>
This gets the number of whole months from a base date (0) and then adds them to that base date. Thus rounding Down to the month in which the date is in.
NOTE: In SQL Server 2008, You will still have the TIME attached as 00:00:00.000
This is not exactly the same as "r...
How to download an entire directory and subdirectories using wget?
...ning anymore and I am only able to access the files through a browser. The base URLs for all the files is the same like
8 ...
How do I make JavaScript beep?
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Solution
You can now use base64 files to produce sounds when imported as data URI. The solution is almost the same as the previous ones, except you do not need to import an external audio file.
function beep() {
var snd = new Audio("data:audio/w...
What's the difference between getPath(), getAbsolutePath(), and getCanonicalPath() in Java?
....txt
C:\projects\sandbox\trunk\file.txt
So, getPath() gives you the path based on the File object, which may or may not be relative; getAbsolutePath() gives you an absolute path to the file; and getCanonicalPath() gives you the unique absolute path to the file. Notice that there are a huge number ...
How to use the 'sweep' function
...a weighted covariance matrix as per @James King's example.
Here's another based on a current project:
set.seed(1)
## 2x2x2 array
a1 <- array(as.integer(rnorm(8, 10, 5)), dim=c(2, 2, 2))
## 'element-wise' sum of matrices
## weights = 1
rowSums(a1, dims=2)
## weights
w1 <- c(3, 4)
## a1[, , 1]...
What is a race condition?
...rent.atomic, concurrent data structures, proper synchronization, and actor based concurrency will help.
The best resource for concurrency is JCIP. You can also get some more details on above explanation here.
share
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Java Enum definition
..., being able to say that Enum<E> implements Comparable<E>. The base class is able to do the comparisons (in the case of enums) but it can make sure that it only compares the right kind of enums with each other. (EDIT: Well, nearly - see the edit at the bottom.)
I've used something simil...
Where Is Machine.Config?
... when you save something system does not save your changes in wrong folder based on 32 or 64 bit.
– Afshin Teymoori
Jan 29 '16 at 4:41
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What's the fastest algorithm for sorting a linked list?
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Comparison sorts (i.e. ones based on comparing elements) cannot possibly be faster than n log n. It doesn't matter what the underlying data structure is. See Wikipedia.
Other kinds of sort that take advantage of there being lots of identical elements i...