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What is 'Pattern Matching' in functional languages?
...);
}
(Almost always, ML languages implement pattern matching without run-time type-tests or casts, so the C# code is somewhat deceptive. Let's brush implementation details aside with some hand-waving please :) )
Data structure decomposition in a nutshell
Ok, let's go back to the peek method:
le...
Why is 1/1/1970 the “epoch time”?
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Early versions of unix measured system time in 1/60 s intervals. This meant that a 32-bit unsigned integer could only represent a span of time less than 829 days. For this reason, the time represented by the number 0 (called the epoch) had to be set in the very re...
How to determine SSL cert expiration date from a PEM encoded certificate?
...er the certificate has expired or not, or whether it will within a certain time period, without having to parse the date above.
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How to make good reproducible pandas examples
Having spent a decent amount of time watching both the r and pandas tags on SO, the impression that I get is that pandas questions are less likely to contain reproducible data. This is something that the R community has been pretty good about encouraging, and thanks to guides like this , newc...
Get a UTC timestamp [duplicate]
How can I get the current UTC timestamp in JavaScript? I want to do this so I can send timestamps from the client-side that are independent of their timezone.
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SQL Server: Filter output of sp_who2
...AX),
DBName VARCHAR(MAX),
Command VARCHAR(MAX),
CPUTime INT,
DiskIO INT,
LastBatch VARCHAR(MAX),
ProgramName VARCHAR(MAX),
SPID_1 INT,
REQUESTID INT
)
INSERT INTO @Table EXEC sp_who2
SELECT *
FROM @Table
WHERE ....
And filter on...
multiprocessing: How do I share a dict among multiple processes?
... can still get different random numbers if I do np.random.seed(None) every time that I generate a random number, but this does not allow me to use the random state of the parent process, which is not what I want. Any help is greatly appreciated.
– Amir
Mar 20 '...
Regular expression to return text between parenthesis
...up(1):
>>> import re
>>> s = u'abcde(date=\'2/xc2/xb2\',time=\'/case/test.png\')'
>>> re.search(r'\((.*?)\)',s).group(1)
u"date='2/xc2/xb2',time='/case/test.png'"
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Fastest way to check if a value exists in a list
...nsider using a set, but constructing that set from your list may take more time than faster membership testing will save. The only way to be certain is to benchmark well. (this also depends on what operations you require)
sh...
Should I use Java's String.format() if performance is important?
We have to build Strings all the time for log output and so on. Over the JDK versions we have learned when to use StringBuffer (many appends, thread safe) and StringBuilder (many appends, non-thread-safe).
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