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How to find the lowest common ancestor of two nodes in any binary tree?
...e for your other node in question, resulting in (steps not shown): {1, 2}
Now compare the two lists you made looking for the first element where the list differ, or the last element of one of the lists, whichever comes first.
This algorithm requires O(h) time where h is the height of the tree. In ...
Why is there an “Authorization Code” flow in OAuth2 when “Implicit” flow works so well?
...oken if you are not using en encrypted connection (HTTPS) allowing what's known as Man-in-the-middle attacks.
Passing the access token directly in a URL param could in theory be possible but the auth sever would have to make sure the redirect URI is using HTTPS with TLS encryption and a 'trusted' S...
What does cherry-picking a commit with Git mean?
...ster branch, where you can for example add
functionality for release2.
NOW: You fix something in release1. Of course you need this fix also in master. And that is a typical use-case for cherry picking. So cherry pick in this scenario means that you take a commit from release1 branch and include ...
Design patterns to avoid [closed]
...mon today.
From there you can read up on SOLID principles which was made known by Robert Cecil Martin (aka. Uncle Bob). Scott Hanselman interviewed Uncle Bob in a podcast about these principles:
Single Responsibility Principle
Open Closed Principle
Liskov Substitution Principle
Interface Segregat...
How to grep for two words existing on the same line? [duplicate]
...wer more for the "teach a man how to fish" bit, I expected the OP doesn't know them, and man pages can get pretty handy.
– houbysoft
Jun 25 '11 at 21:53
8
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What's the point of having pointers in Go?
I know that pointers in Go allow mutation of a function's arguments, but wouldn't it have been simpler if they adopted just references (with appropriate const or mutable qualifiers). Now we have pointers and for some built-in types like maps and channels implicit pass by reference.
...
How do you write a migration to rename an ActiveRecord model and its table in Rails?
...y.
Edit:
In Rails 3.1 & 4, ActiveRecord::Migration::CommandRecorder knows how to reverse rename_table migrations, so you can do this:
class RenameOldTableToNewTable < ActiveRecord::Migration
def change
rename_table :old_table_name, :new_table_name
end
end
(You still have to go t...
Configuring diff tool with .gitconfig
...add the following lines to your ~/.gitconfig:
[diff]
tool = vimdiff
Now, you will be able to run "git difftool" and use your tool of choice.
Specifying your own difftool, on the other hand, takes a little bit more work, see How do I view 'git diff' output with my preferred diff tool/ viewer?...
What is the correct way to document a **kwargs parameter?
...
The most meaningful continuation of that is now subprocess.Popen and I'm not sure that it's a particularly great example any more.
– Donal Fellows
Jan 11 '17 at 21:50
...
Why does changing 0.1f to 0 slow down performance by 10x?
...
@s73v3r That's a very good question. Now that I look at the assembly, not even + 0.0f gets optimized out. If I had to guess, it could be that + 0.0f would have side-effects if y[i] happened to be a signalling NaN or something... I could be wrong though.
...