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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...
brew install mysql on macOS
...d MySQL 5.7, the process is a bit different than for previous versions.
In order to reset the root password, proceed as follows:
sudo rm -rf /usr/local/var/mysql
mysqld --initialize
A temporary password will be printed to the console and it can only be used for updating the root password:
mysql....
Sort ArrayList of custom Objects by property
... above the other answer is beyond me. This link may also be useful: Object Ordering Tutorial at Sun.com.
– BalusC
May 6 '10 at 21:26
...
What is the best way to use a HashMap in C++?
...
The standard library includes the ordered and the unordered map (std::map and std::unordered_map) containers. In an ordered map the elements are sorted by the key, insert and access is in O(log n). Usually the standard library internally uses red black trees ...
What is difference between functional and imperative programming languages?
...he computer how to change bits, bytes and words in it's memory and in what order. In functional ones, we tell the computer what things, actions etc. are. For example, we say that the factorial of 0 is 1, and the factorial of every other natural number is the product of that number and the factorial ...
List vs tuple, when to use each? [duplicate]
... You would want to change the values (go with list), but at the same time order and position is meaningful and consistent (go with tuple?).
– Arlen
Aug 23 '11 at 15:13
52
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Set Matplotlib colorbar size to match graph
...ink, and other similar parameters cannot necessarily give the very precise order, which really bothers me. I believe that giving the colorbar its own axes might be a better solution to address all the issues that have been mentioned.
Code
import matplotlib.pyplot as plt
import numpy as np
fig=plt...
Retrieving a List from a java.util.stream.Stream in Java 8
...s forEach is explicitly nondeterministic—even in a sequential stream the order of element processing is not guaranteed. You would have to use forEachOrdered to ensure correct ordering. The intention of the Stream API designers is that you will use collector in this situation, as below.]
An altern...
Converting an array of objects to ActiveRecord::Relation
...ECT .... WHERE `my_models`.id IN (2, 3, 4, 6, ....
Keep in mind that the ordering of the array will be lost - But since your objective is only to run a class method on the collection of these objects, I assume it won't be a problem.
...
When and why are database joins expensive?
... bulk disk reads which are the most expensive aspect of the exercise by an order of magnitude. Performing a join, by contrast, logically requires retrieval of only the keys. In practice, not even the key values are fetched: the key hash values are used for join comparisons, mitigating the cost of mu...