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Converting a Uniform Distribution to a Normal Distribution
...ing the log). Even if clamped to [-6, 6] the chances of being outside this range are about 1.98e-9, good enough for most people even in science. For the 8.57 and 9.41 figures this becomes 1.04e-17 and 4.97e-21. These numbers are so small that the difference between a Box Muller sampling and a true g...
Validating IPv4 addresses with regexp
... (25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?(\.|$)){4} , but it produces some strange results:
36 Answers
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Image comparison - fast algorithm
...rithm
Computing the color histograms is straightforward -- just pick the range for your histogram buckets, and for each range, tally the number of pixels with a color in that range. For example, consider the "green" histogram, and suppose we choose 4 buckets for our histogram: 0-63, 64-127, 128-1...
How do I know if a generator is empty from the start?
... the generator is designed to yield None. def gen(): for pony in range(4): yield None if pony == 2 else pony
– Paul
Nov 3 '16 at 21:53
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Find object in list that has attribute equal to some value (that meets any condition)
...mport random
value = 5
test_list = [Test(random.randint(0,100)) for x in range(1000)]
if value in test_list:
print "i found it"
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Which sort algorithm works best on mostly sorted data? [closed]
...still have to move the entire block to insert the element. So instead of 2xrange you get range + logb(range).
– this
Jan 20 '14 at 9:41
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Which is faster in Python: x**.5 or math.sqrt(x)?
...ificantly faster than x**0.5.
import math
N = 1000000
%%timeit
for i in range(N):
z=i**.5
10 loops, best of 3: 156 ms per loop
%%timeit
for i in range(N):
z=math.sqrt(i)
10 loops, best of 3: 91.1 ms per loop
Using Python 3.6.9 (notebook).
...
How to deal with floating point number precision in JavaScript?
...4,740,992 the representable numbers are exactly the integers. For the next range, from 2⁵³ to 2⁵⁴, everything is multiplied by 2, so the representable numbers are the even ones, etc. Conversely, for the previous range from 2⁵¹ to 2⁵², the spacing is 0.5, etc. This is due to simply incre...
Any gotchas using unicode_literals in Python 2.6?
...eError: 'ascii' codec can't decode byte 0xc3 in position 4: ordinal not in range(128)
In this example, two.name is an utf-8 encoded string (not unicode) since it did not import unicode_literals, and one.name is an unicode string. When you mix both, python tries to decode the encoded string (assumi...
Format a Go string without printing?
...your user name is: {{.UserName}}
You have the following roles assigned:
{{range $i, $r := .Roles}}{{if $i}}, {{end}}{{.}}{{end}}
`
And provide data like this for executing it:
data := map[string]interface{}{
"Name": "Bob",
"UserName": "bob92",
"Roles": []string{"dbteam", "uite...