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Converting between datetime, Timestamp and datetime64
How do I convert a numpy.datetime64 object to a datetime.datetime (or Timestamp )?
12 Answers
...
node.js hash string?
...a) {
return crypto.createHash("sha256").update(data, "binary").digest("base64");
// ------ binary: hash the byte string
}
sha256("string or binary");
Documentation:
crypto.createHash(algorithm[, options]): The algorithm is dependent on the av...
How to use OpenSSL to encrypt/decrypt files?
... enc -ciphername [-in filename] [-out filename] [-pass arg]
[-e] [-d] [-a/-base64] [-A] [-k password] [-kfile filename]
[-K key] [-iv IV] [-S salt] [-salt] [-nosalt] [-z] [-md] [-p] [-P]
[-bufsize number] [-nopad] [-debug] [-none] [-engine id]
Explanation of most useful parameters with regards t...
What column type/length should I use for storing a Bcrypt hashed password in a Database?
I want to store a hashed password (using BCrypt) in a database. What would be a good type for this, and which would be the correct length? Are passwords hashed with BCrypt always of same length?
...
Is gcc std::unordered_map implementation slow? If so - why?
...ng the code on GCC.
My answer is just to establish some kind of knowledge base to other answers.
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How do you calculate log base 2 in Java for integers?
I use the following function to calculate log base 2 for integers:
10 Answers
10
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Retrieve list of tasks in a queue in Celery
...'re using Redis. To get the task counts:
redis-cli -h HOST -p PORT -n DATABASE_NUMBER llen QUEUE_NAME
But, prioritized tasks use a different key in redis, so the full picture is slightly more complicated. The full picture is that you need to query redis for every priority of task. In python (and ...
Is there a max array length limit in C++?
...ccess. The best way to store this data outside of an array is pretty much based on how you want to access it. If you need to access array members randomly, for most applications there tend to be ways of grouping clumps of data that tend to get accessed at the same time. For example, in large GIS ...
How can I generate random alphanumeric strings?
...hen the call to .Next() will return the same value as Random() uses a time based seed.
– Dan Rigby
Sep 30 '13 at 18:16
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Quit and restart a clean R session from within R?
...xec which would normally be used to open a file in the default application based on file type. When used on a .exe, apparently, it runs the executable. The important difference, though, is that the system starts the application in it's own separate context. So here's the code that works for me:
mak...