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How can I get nth element from a list?
...ion in many languages is to assign to an indexed position in an array. In python you might:
>>> a = [1,2,3,4,5]
>>> a[3] = 9
>>> a
[1, 2, 3, 9, 5]
The
lens package gives this functionality with the (.~) operator. Though unlike in python the original list is not mutat...
How to Git stash pop specific stash in 1.8.3?
...
Works on ubuntu linux too
– Bouke Versteegh
Oct 7 '15 at 12:18
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How to deal with persistent storage (e.g. databases) in Docker
...ta"
web:
restart: on-failure:10
build: .
command: gunicorn mypythonapp.wsgi:application -b :8000 --reload
volumes:
- .:/code
ports:
- "8000:8000"
links:
- db
volumes:
db-data:
As far as I can understand: This will create a data volume container (db_da...
Is mongodb running?
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Thanks. I got this: [root@xxx lib]# ./mongodb-linux-i686-1.6.5/bin/mongod --fork --logpath /var/log/m ongodb.log --logappend all output going to: /var/log/mongodb.log forked process: 7518 but still when I close the shell and open a new one I get Connect failed
...
How to add include path in Qt Creator?
...QT is designed for being cross platform. And if you compile same code on a Linux machine, the compiler will fail to find those file names like C:\ Moreover, even if you rename the source folder or move it somewhere else on your own computer, it will still fail, and you will have to edit the .pro fi...
Add a prefix string to beginning of each line
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'ts' is not installed by default on many Linux distros. Also, downvoting because the trailing "tr -d ' '" in this answer will remove all spaces from the lines, not just the space that was added by 'ts'
– Tim Bird
May 13 at 17:...
Hash function that produces short hashes?
...e result to the desired length, which may be good enough.
For example, in Python:
>>> import hashlib
>>> hash = hashlib.sha1("my message".encode("UTF-8")).hexdigest()
>>> hash
'104ab42f1193c336aa2cf08a2c946d5c6fd0fcdb'
>>> hash[:10]
'104ab42f11'
...
Generate table relationship diagram from existing schema (SQL Server) [closed]
...
Or you can, you know be on GNU/LInux or Macos actually without any license, just with connection credentials.
– helvete
Feb 25 at 16:12
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What is an idempotent operation?
...d f is an operation that may mutate that object. For example, consider the Python set and its discard method. The discard method removes an element from a set, and does nothing if the element does not exist. So:
my_set.discard(x)
has exactly the same effect as doing the same operation twice:
my_...
What is an intuitive explanation of the Expectation Maximization technique? [closed]
...escribed above.
Example: estimating mean and standard deviation
I'll use Python in this example, but the code should be fairly easy to understand if you're not familiar with this language.
Suppose we have two groups, red and blue, with the values distributed as in the image above. Specifically, ...