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Find rows with multiple duplicate fields with Active Record, Rails & Postgres
What is the best way to find records with duplicate values across multiple columns using Postgres, and Activerecord?
5 Answ...
What is the Bash equivalent of Python's pass statement
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More info: Stack Overflow: What is the purpose of the : (colon) GNU Bash builtin?
– Keith
Mar 9 '18 at 3:04
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How can I use Python to get the system hostname?
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Just curious what's the difference between socket.gethostname() and os.uname()[1] or platform.uname()[1]
– LetsOMG
Mar 23 '18 at 21:52
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raw_input function in Python
What is the raw_input function? Is it a user interface? When do we use it?
7 Answers
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Checking out Git tag leads to “detached HEAD state”
...terms slightly oversimplified.
In git, a tag (like many other things) is what's called a treeish. It's a way of referring to a point in in the history of the project. Treeishes can be a tag, a commit, a date specifier, an ordinal specifier or many other things.
Now a branch is just like a tag bu...
How to list all installed packages and their versions in Python?
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If you have pip install and you want to see what packages have been installed with your installer tools you can simply call this:
pip freeze
It will also include version numbers for the installed packages.
Update
pip has been updated to also produce the same outpu...
How to empty (“truncate”) a file on linux that already exists and is protected in someway?
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What's the difference between > file and >| file?
– Will
Jul 28 '14 at 2:27
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How do you get the magnitude of a vector in Numpy?
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Actually from what you write above, linalg.norm is the fastest since it does 9 calls in 29ms so 1 call in 3.222ms vs. 1 call in 4.5ms for inner1d.
– patapouf_ai
Jun 1 '16 at 23:25
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How can I update the current line in a C# Windows Console App?
When building a Windows Console App in C#, is it possible to write to the console without having to extend a current line or go to a new line? For example, if I want to show a percentage representing how close a process is to completion, I'd just like to update the value on the same line as the cur...
Exception thrown in NSOrderedSet generated accessors
... at WWDC. They acknowledge the issue and that it's a genuine bug, and from what I've seen it has the "critical" status, but of course there's no promise as to when they'll fix it. I don't think it'll be fixed in iOS6/Mountain Lion. I think it'd be good to duplicate this radar further. Currently it h...