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How do I find duplicate values in a table in Oracle?
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Gradient of n colors ranging from color 1 and color 2
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181
colorRampPalette could be your friend here:
colfunc <- colorRampPalette(c("black", "white"...
set DateTime to start of month
...var now = DateTime.Now;
var startOfMonth = new DateTime(now.Year,now.Month,1);
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Pandas DataFrame Groupby two columns and get counts
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126
Followed by @Andy's answer, you can do following to solve your second question:
In [56]: df.g...
std::vector performance regression when enabling C++11
...nteresting performance regression in a small C++ snippet, when I enable C++11:
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Efficiency of Java “Double Brace Initialization”?
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Count(*) vs Count(1) - SQL Server
Just wondering if any of you people use Count(1) over Count(*) and if there is a noticeable difference in performance or if this is just a legacy habit that has been brought forward from days gone past?
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Android Layout with ListView and Buttons
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137
I think this is what you are looking for.
<?xml version="1.0" encoding="utf-8"?>
<Re...
How is this fibonacci-function memoized?
...is asked for again. If we define some list, xs=[0..] and later ask for its 100th element, xs!!99, the 100th slot in the list gets "fleshed out", holding the number 99 now, ready for next access.
That is what that trick, "going-through-a-list", is exploiting. In normal doubly-recursve Fibonacci def...