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How do I move forward and backward between commits in git?
...linear history without merge commits):
git checkout $(git rev-list --topo-order HEAD..towards | tail -1)
where towards is a SHA1 of the commit or a tag.
Explanation:
the command inside $() means: get all the commits between current HEAD and towards commit (excluding HEAD), and sort them in th...
Is there a software-engineering methodology for functional programming? [closed]
...ere are some parallels:
Many OO "design patterns" are captured as higher-order functions. For example, the Visitor pattern is known in the functional world as a "fold" (or if you are a pointy-headed theorist, a "catamorphism"). In functional languages, data types are mostly trees or tuples, and ...
How to generate a Dockerfile from an image?
... I guess because docker history prints the Dockerfile lines in a reverse order and it drops the RUN instructions (you get only the command itself, not the RUN keyworkd in front of it) and other stuff, so you need to edit it manually to get to a buildable Dockerfile. That other tool may do this edi...
Using union and order by clause in mysql
I want to use order by with union in mysql query.
I am fetching different types of record based on different criteria from a table based on distance for a search on my site.
The first select query returns data related to the exact place search .
The 2nd select query returns data related to distance ...
Why does the C++ STL not provide any “tree” containers?
...antees log(n) insertion/deletion/lookup (and containing elements in sorted order). This is all map is used for and is implemented (usually) as a red/black tree. A red/black tree makes sure that the tree is balanced. So the depth of the tree is directly related to the number of elements in the tree.
...
Setting environment variables via launchd.conf no longer works in OS X Yosemite/El Capitan/macOS Sie
...environment file - just relaunch your application
Issues / problems:
In order your env variables were correctly taken by applications after system reboot you will need:
either login twice: login => logout => login
or close & re-open applications manually, where env variables should be...
How to enable mod_rewrite for Apache 2.2
...
In order to use mod_rewrite you can type the following command in the terminal:
sudo a2enmod rewrite
Restart apache2 after
sudo /etc/init.d/apache2 restart
or
sudo service apache2 restart
or as per new unified System Co...
Proper way to use **kwargs in Python
...e a default value. kwargs is nice because you can submit your args in any order you choose. Positional arguments don't give you that freedom.
– Kekoa
Jul 8 '09 at 14:57
95
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Advantage of creating a generic repository vs. specific repository for each object?
... for users.Where(u=>u.HasPurchasedAnything) instead of users.Join(x=>Orders, something something, I dont know linq).Where(order=>order.Status==1).Join(x=>x.products).Where(x.... etc etc etc.... blah blah blah
– Arnis Lapsa
Oct 7 '11 at 17:43
...
In Functional Programming, what is a functor?
...ule that provides:
The type of key to be used in the binary tree
A total-ordering function on keys
Once you've done this, you can use the same balanced binary tree implementation forever. (The type of value stored in the tree is usually left polymorphic—the tree doesn't need to look at values...