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将 App Inventor 2 项目连接到外部传感器
Note: This report describes work carried out in Spring 2014 for an Undergraduate A...
Difference between Divide and Conquer Algo and Dynamic Programming
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answered Nov 24 '12 at 5:55
OneMoreErrorOneMoreError
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Flatten an Array of Arrays in Swift
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Swift >= 3.0
reduce:
let numbers = [[1,2,3],[4],[5,6,7,8,9]]
let reduced = numbers.reduce([], +)
flatMap:
let numbers = [[1,2,3],[4],[5,6,7,8,9]]
let flattened = numbers.flatMap { $0 }
joined:
let numbers = [[1,2,3],[4],[5,6,7,8,9]]
let joined = Array(number...
`elif` in list comprehension conditionals
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259
Python's conditional expressions were designed exactly for this sort of use-case:
>>>...
How can I remove an element from a list?
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227
I don't know R at all, but a bit of creative googling led me here: http://tolstoy.newcastle.ed...
Convert list of dictionaries to a pandas DataFrame
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edited Jul 22 at 17:24
cs95
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Removing duplicate objects with Underscore for Javascript
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233
.uniq/.unique accepts a callback
var list = [{a:1,b:5},{a:1,c:5},{a:2},{a:3},{a:4},{a:3},{a:2...
Is Big O(logn) log base e?
...he derivation of the O() polynomial, in the case of binary search, only log2 is correct. I assume this distinction was the intuitive inspiration for your question to begin with.
Also, as a matter of my opinion, writing O(log2 N) is better for your example, because it better communicates the deriv...
How to get the Power of some Integer in Swift language?
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20 Answers
20
Active
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Is there a Python function to determine which quarter of the year a date is in?
...ore the division, and dividing by 4 instead of 3. Since .month goes 1 to 12, it's easy to check for yourself what formula is right:
for m in range(1, 13):
print m//4 + 1,
print
gives 1 1 1 2 2 2 2 3 3 3 3 4 -- two four-month quarters and a single-month one (eep).
for m in range(1, 13):
prin...