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Scala Doubles, and Precision
... math.round(x*m) / m
}
}
This is about 10x faster if you're within the range of Long (i.e 18 digits), so you can round at anywhere between 10^18 and 10^-18.
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Print newline in PHP in single quotes
... parse the \n as a new line character and print that result
We're in the range of millionths of a second, but there IS a difference in performance. I would recommend you to use single quotes whenever possible, even knowing you won't be able to perceive this performance increase. But I'm a paranoid...
Image Segmentation using Mean Shift explained
... words:
Action:replaces each pixel with the mean of the pixels in a range-r neighborhood and whose value is within a distance d.
The Mean Shift takes usually 3 inputs:
A distance function for measuring distances between pixels. Usually the Euclidean distance, but any other well defined d...
List of all special characters that need to be escaped in a regex
... Unescaped - within [] may not always work since it is used to define ranges. It's safer to escape it. For example, the patterns [-] and [-)] match the string - but not with [(-)].
– Kenston Choi
Sep 12 '16 at 5:28
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Remove trailing newline from the elements of a string list
...re great. But just to explain your error:
strip_list = []
for lengths in range(1,20):
strip_list.append(0) #longest word in the text file is 20 characters long
for a in lines:
strip_list.append(lines[a].strip())
a is a member of your list, not an index. What you could write is this:
[.....
Get the cartesian product of a series of lists?
...:
# product('ABCD', 'xy') --> Ax Ay Bx By Cx Cy Dx Dy
# product(range(2), repeat=3) --> 000 001 010 011 100 101 110 111
pools = map(tuple, args) * kwds.get('repeat', 1)
result = [[]]
for pool in pools:
result = [x+[y] for x in result for y in pool]
for prod in r...
Adding hours to JavaScript Date object?
... (see the docs):
If a parameter you specify is outside of the expected range, setHours() attempts to update the date information in the Date object accordingly
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How does tuple comparison work in Python?
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@CMCDragonkai -- yes. try: x = tuple([0 for _ in range(n)]) and do the same for y. Setting n=100, 1000, 10,000, and 100,000 and running %timeit x==y gave timing values of .5, 4.6, 43.9, and 443 microseconds respectively, which is about as close to O(n) as you can practica...
Adding a legend to PyPlot in Matplotlib in the simplest manner possible
...tplotlib.pyplot
import math
import matplotlib.pyplot as plt
x=[]
for i in range(-314,314):
x.append(i/100)
ysin=[math.sin(i) for i in x]
ycos=[math.cos(i) for i in x]
plt.plot(x,ysin,label='sin(x)') #specify label for the corresponding curve
plt.plot(x,ycos,label='cos(x)')
plt.xticks([-3.14,-1...
C# Set collection?
...is ordered. For example, you can quickly find the start and end point of a range and iterate from the start to the end, visiting items in key-order. SortedDictionary is roughly equivalent to std::set.
– doug65536
Feb 4 '13 at 7:43
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