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Android Writing Logs to text File
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84
Don't forget to add permission for writing_external_storage in Manifest!
– virusss8
Jan 18 '12 at 20...
What is the best way to repeatedly execute a function every x seconds?
...nd have it run every second without delay...
– Angry 84
Jan 1 '16 at 22:48
7
I prefer from time i...
Fast way of counting non-zero bits in positive integer
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I tried adapting Óscar's and Adam's solutions to process the integer in 64-bit and 32-bit chunks, respectively. Both were at least ten times slower than bin(n).count("1") (the 32-bit version took about half again as much time).
On the other hand, gmpy popcount() took about 1/20th of the time of ...
C# Lambda expressions: Why should I use them?
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84
I found them useful in a situation when I wanted to declare a handler for some control's event,...
How to update Python?
...ow, these answers are for the same bit-versions, and by bit-version I mean 64-bit vs. 32-bit. For example, these answers would apply to updating from 64-bit Python-2.7.10 to 64-bit Python-2.7.11, ie: the same bit-version. While it is possible to install two different bit versions of Python together,...
What does numpy.random.seed(0) do?
...([ 0.42, 0.65, 0.44, 0.89])
>>> numpy.random.rand(4)
array([ 0.96, 0.38, 0.79, 0.53])
(pseudo-)random numbers work by starting with a number (the seed), multiplying it by a large number, adding an offset, then taking modulo of that sum. The resulting number is then used as the seed...
How to create a GUID/UUID in Python
...tions such as '+','=', etc..
Instead of hexadecimal, I use a url-safe base64 string. The following does not conform to any UUID/GUID spec though (other than having the required amount of randomness).
import base64
import uuid
# get a UUID - URL safe, Base64
def get_a_uuid():
r_uuid = base64.u...
Manually map column names with class properties
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84
This works fine:
var sql = @"select top 1 person_id PersonId, first_name FirstName, last_name ...
Why should I use IHttpActionResult instead of HttpResponseMessage?
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84
You can still use HttpResponseMessage. That capability will not go away. I felt the same way as...
Reference — What does this symbol mean in PHP?
... |
-------------------------------------------
|Place Value | 128| 64| 32| 16| 8| 4| 2| 1|
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This representation of 1 Byte
1 + 2 + 4 + 8 + 16 + 32 + 64 + 128 = 255 (1 Byte)
A few examples for better understanding
The "AND" operator: &
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