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Why (0-6) is -6 = False? [duplicate]
...tialization in a block of integer objects we saw above. The small integers range is from -5 to 256. Many Python programs spend a lot of time using integers in that range so this is a smart decision.
This is only an implementation detail of CPython and you shouldn't rely on this. For instance, PyPy...
Querying DynamoDB by date
...entation
Original Answer:
DynamoDB does not allow indexed lookups on the range key only. The hash key is required such that the service knows which partition to look in to find the data.
You can of course perform a scan operation to filter by the date value, however this would require a full tab...
Test if lists share any items in python
...port timeit
>>> timeit('bool(set(a) & set(b))', setup="a=list(range(1000));b=list(range(1000))", number=100000)
26.077727576019242
>>> timeit('any(i in a for i in b)', setup="a=list(range(1000));b=list(range(1000))", number=100000)
0.16220548999262974
Here's a graph of the ex...
Does Java 8 provide a good way to repeat a value or function?
...
For this specific example, you could do:
IntStream.rangeClosed(1, 8)
.forEach(System.out::println);
If you need a step different from 1, you can use a mapping function, for example, for a step of 2:
IntStream.rangeClosed(1, 8)
.map(i -> 2 * i - 1)
...
Mapping two integers to one, in a unique and deterministic way
..., here. The limitation of Cantor pairing function (relatively) is that the range of encoded results doesn't always stay within the limits of a 2N bit integer if the inputs are two N bit integers. That is, if my inputs are two 16 bit integers ranging from 0 to 2^16 -1, then there are 2^16 * (2^16 -1)...
Breaking out of nested loops [duplicate]
...
for x in xrange(10):
for y in xrange(10):
print x*y
if x*y > 50:
break
else:
continue # only executed if the inner loop did NOT break
break # only executed if the inner loop DID brea...
How to generate a range of numbers between two numbers?
... Your first "Demo" link keeps telling me String index out of range: 33
– slartidan
Nov 19 '15 at 7:33
1
...
How to enumerate a range of numbers starting at 1
...entioned, this is straightforward to do in Python 2.6 or newer:
enumerate(range(2000, 2005), 1)
Python 2.5 and older do not support the start parameter so instead you could create two range objects and zip them:
r = xrange(2000, 2005)
r2 = xrange(1, len(r) + 1)
h = zip(r2, r)
print h
Result:
...
Any way to replace characters on Swift String?
...ring = aString.replacingOccurrences(of: " ", with: "+", options: .literal, range: nil)
And as noted by @cprcrack below, the options and range parameters are optional, so if you don't want to specify string comparison options or a range to do the replacement within, you only need the following.
le...
How do Trigonometric functions work?
...
First, you have to do some sort of range reduction. Trig functions are periodic, so you need to reduce arguments down to a standard interval. For starters, you could reduce angles to be between 0 and 360 degrees. But by using a few identities, you realize yo...