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Peak detection in a 2D array
...nic measuring pressure under a dogs paw. I use Python for my data analysis and now I'm stuck trying to divide the paws into (anatomical) subregions.
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Collect successive pairs from a stream
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My StreamEx library which extends standard streams provides a pairMap method for all stream types. For primitive streams it does not change the stream type, but can be used to make some calculations. Most common usage is to calculate differences:
int[] pairwis...
Generic List - moving an item within the list
So I have a generic list, and an oldIndex and a newIndex value.
10 Answers
10
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How to create the most compact mapping n → isprime(n) up to a limit N?
...test, you should probably run a probabilistic test since those are faster, and then follow it up with a deterministic test to make sure the number is prime.
You should know that the math behind the fastest algorithms is not for the faint of heart.
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How to calculate the SVG Path for an arc (of a circle)
...t (200,200), radius 25, how do I draw an arc from 270 degree to 135 degree and one that goes from 270 to 45 degree?
13 Answ...
Java 8 Lambda function that throws exception?
I know how to create a reference to a method that has a String parameter and returns an int , it's:
25 Answers
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Reverse colormap in matplotlib
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The standard colormaps also all have reversed versions. They have the same names with _r tacked on to the end. (Documentation here.)
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Give examples of functions which demonstrate covariance and contravariance in the cases of both over
Please show a good example for covariance and contravariance in Java.
3 Answers
3
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Is it safe to remove selected keys from map within a range loop?
...r key := range m {
if key.expired() {
delete(m, key)
}
}
And the language specification:
The iteration order over maps is not specified and is not guaranteed to be the same from one iteration to the next. If map entries that have not yet been reached are removed during iteratio...
Ruby regular expression using variable name
...resting if var can contain regular expression meta-characters. If it does and you want those matacharacters to do what they usually do in a regular expression, then the same gsub will work:
var = "Value|a|test"
str = "a test Value"
str.gsub( /#{var}/, 'foo' ) # => "foo foo foo"
However, if yo...