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Why functional languages? [closed]
...radigm than imperative and object-oriented languages. They use side-effect-free functions as a basic building block in the language. This enables lots of things and makes a lot of things more difficult (or in most cases different from what people are used to).
One of the biggest advantages with fun...
What exactly is Heroku?
...ows you to start in minutes. Also they provide first 750 computation hours free of charge which means you can have one processes (aka Dyno) at no cost. Also performance is very good e.g. simple web application written in node.js can handle around 60 - 70 requests per second.
Heroku competitors are:...
Git, rewrite previous commit usernames and emails
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Yeah, that would change all commits to the new author info.
– ewall
May 28 '10 at 19:31
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Postgres - FATAL: database files are incompatible with server
...esql-upgrade-database
The above command is taken from the output of brew info postgres
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How to create index on JSON field in Postgres?
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Found:
CREATE TABLE publishers(id INT, info JSON);
CREATE INDEX ON publishers((info->>'name'));
As stated in the comments, the subtle difference here is ->> instead of ->. The former one returns the value as text, the latter as a JSON object.
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What are the basic rules and idioms for operator overloading?
...od. (Hence, peer review is a must, but peers must be chosen between people free from dogmas and prejudice.)
– Emilio Garavaglia
Apr 9 '12 at 16:57
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What can MATLAB do that R cannot do? [closed]
...e R mailing lists are amazing), is rapidly developing (see CRAN), and it's free (which isn't a small issue!).
Edit: I would just add one further point to this: the book "Functional Data Analysis with R and MATLAB" includes a chapter on the "Essential Comparisons of the Matlab and R Languages". T...
How to merge a specific commit in Git
...r CI CD.
We used git flow with develop and master branches.
Developers are free to merge their changes directly to develop or via a pull request from a feature branch. However to master we merge only the stable commits from the develop branch in an automated way via Jenkins.
In this case doing cherr...
opengl: glFlush() vs. glFinish()
...u need to call glFinish before signaling to the rendering thread that it's free to render what has been asynchronously loaded.
– Marco Mp
Jun 13 '13 at 11:48
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ipython: print complete history (not just current session)
...teractive/magics.html#magic-history)
Then you can use the the get_session_info function to retreive the date and time for the session you are interested in.(http://ipython.readthedocs.io/en/stable/api/generated/IPython.core.history.html?highlight=hist#IPython.core.history.HistoryAccessor.get_sessio...