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How do shift operators work in Java? [duplicate]
...n and returns a double. Sometimes, shifting is shorter/more efficient than converting an int to a double, calling Math.pow() and converting back to an int.) It's also useful for transforming an int value from signed (Java) to an unsigned equivalent (C/C++; Java doesn't have unsigned types, which is ...
What is an alternative to execfile in Python 3?
... is better, since it takes the globals and locals from the caller:
import sys
def execfile(filename, globals=None, locals=None):
if globals is None:
globals = sys._getframe(1).f_globals
if locals is None:
locals = sys._getframe(1).f_locals
with open(filename, "r") as fh:...
Expand a random range from 1–5 to 1–7
... a random real number selected uniformly from the range [0, 1], we need to convert it to a series of uniformly random numbers in the range [0, 6] to generate the output of rand7(). How do we do this? Just the reverse of what we just did -- we convert it to an infinitely precise decimal in base 7, ...
How do you express binary literals in Python?
...t cases) - just pass int the string of zeros and ones and the base you are converting from (2):
>>> int('010101', 2)
21
You can optionally have the 0b or 0B prefix:
>>> int('0b0010101010', 2)
170
If you pass it 0 as the base, it will assume base 10 if the string doesn't speci...
How to multiply duration by integer?
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int32 and time.Duration are different types. You need to convert the int32 to a time.Duration, such as time.Sleep(time.Duration(rand.Int31n(1000)) * time.Millisecond).
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Assigning variables with dynamic names in Java
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Excellent when you need to convert Android's sensor event.values[] into a set of variables. event.values[] could have a length from 1 to 6 and it's handy to have it convert, in my case for an array-less json marshaling.
– Farshid ...
Test if string is a guid without throwing exceptions?
I want to try to convert a string to a Guid, but I don't want to rely on catching exceptions (
18 Answers
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Re-raise exception with a different type and message, preserving existing information
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You can use sys.exc_info() to get the traceback, and raise your new exception with said traceback (as the PEP mentions). If you want to preserve the old type and message, you can do so on the exception, but that's only useful if whatever...
Conversion from Long to Double in Java
Is there any way to convert a Long data type to Double or double ?
8 Answers
8
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How do I watch a file for changes?
...using Watchdog?
Python API library and shell utilities to monitor file system events.
Directory monitoring made easy with
A cross-platform API.
A shell tool to run commands in response to directory changes.
Get started quickly with a simple example in Quickstart...
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