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Python progression path - From apprentice to guru
... comprehensions
Discover generators
Incorporate map, reduce, filter, iter, range, xrange often into your code
Discover Decorators
Write recursive functions, a lot
Discover itertools and functools
Read Real World Haskell (read free online)
Rewrite all your old Python code with tons of higher order fu...
Best way to make Java's modulus behave like it should with negative numbers?
...1
0| 0
1| 1
2| 2
3| 0
4| 1
5| 2
If the input is random in the full range of an int, the distribution of both two solutions will be the same. If the input clusters near zero, there will be too few results at n - 1 in the latter solution.
...
What does a tilde do when it precedes an expression?
...can perform that operation to produce a 0.
In other words, ~ used with a range of number values will produce a falsy (coerce to false from 0) value only for the -1 input value, otherwise, any other truthy value.
As we know, -1 is commonly called a sentinel value. It is used for many functions tha...
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...
How can I access Google Sheet spreadsheets only with Javascript?
...s.googleapis.com/v4/spreadsheets/{spreadsheetId}/?key={yourAPIKey}
Get a range of cells
https://sheets.googleapis.com/v4/spreadsheets/{spreadsheetId}/values/{sheetName}!{cellRange}?key={yourAPIKey}
Now armed with this information, one can use AJAX to retrieve data and then manipulate it in Java...
Difference between Select and ConvertAll in C#
...e ConvertAll will loop through the underlying array without extra calls or range checks.
3) Select will create an extra IEnumerable<T> object.
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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 can I make an “are you sure” prompt in a Windows batchfile?
...n operators EQU and NEQ are designed primary for comparing two integers in range -2147483648 to 2147483647 and not for comparing two strings. EQU and NEQ work also for strings comparisons, but result on comparing strings in double quotes on a useless attempt to convert left string to an integer. EQU...
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...