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How to do ToString for a possibly null object?
...efore, while it maybe appears elegant, the cast is almost always necessary and is not that succinct in practice.
As suggested elsewhere, I recommend maybe using an extension method to make this cleaner:
public static string ToStringNullSafe(this object value)
{
return (value ?? string.Empty).ToS...
Memoization in Haskell?
...f :: Int -> Int
faster_f n = f_list !! n
That performs passably well, and replaces what was going to take O(n^3) time with something that memoizes the intermediate results.
But it still takes linear time just to index to find the memoized answer for mf. This means that results like:
*Main Dat...
Normal arguments vs. keyword arguments
...tion them after all of the arguments without names (positional arguments), and there must be default values for any parameters which were not mentioned at all.
The other concept is on the function definition side: you can define a function that takes parameters by name -- and you don't even have to...
How do I know the script file name in a Bash script?
...ovide different functionality based on the name it's called as (think gzip and gunzip on some platforms).
1 That is, to resolve symlinks such that when the user executes foo.sh which is actually a symlink to bar.sh, you wish to use the resolved name bar.sh rather than foo.sh.
...
Change default app.config at runtime
...te fields may work now, but it could use a warning that it isn't supported and may break in future versions of the .NET Framework.
– user743382
Mar 17 '15 at 9:36
...
Select SQL Server database size
... Maybe I'm doing something wrong. I had 100 000 rows that I dropped and then I checked the size given these exampels. Size is still about 14 GB.
– Essej
Sep 22 at 6:39
...
Bash: Strip trailing linebreak from output
When I execute commands in Bash (or to be specific, wc -l < log.txt ), the output contains a linebreak after it. How do I get rid of it?
...
Given a DateTime object, how do I get an ISO 8601 date in string format?
...
I live in Australia, and for me I had to use ToString("yyyy-MM-ddTHH:mm:ssK") for this to work (with the jquery timeago plugin I was using).
– GONeale
Aug 3 '11 at 5:50
...
python exception message capturing
... 2.x
logger.error('Failed to upload to ftp: '+ str(e))
in Python 3.x and modern versions of Python 2.x use except Exception as e instead of except Exception, e:
try:
with open(filepath,'rb') as f:
con.storbinary('STOR '+ filepath, f)
logger.info('File successfully uploaded to ...
Is there a way to detect if an image is blurry?
...
Yes, it is. Compute the Fast Fourier Transform and analyse the result. The Fourier transform tells you which frequencies are present in the image. If there is a low amount of high frequencies, then the image is blurry.
Defining the terms 'low' and 'high' is up to you.
E...