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List changes unexpectedly after assignment. How do I clone or copy it to prevent this?
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3446
With new_list = my_list, you don't actually have two lists. The assignment just copies the re...
How do I save and restore multiple variables in python?
... here...
# Saving the objects:
with open('objs.pkl', 'w') as f: # Python 3: open(..., 'wb')
pickle.dump([obj0, obj1, obj2], f)
# Getting back the objects:
with open('objs.pkl') as f: # Python 3: open(..., 'rb')
obj0, obj1, obj2 = pickle.load(f)
If you have a lot of data, you can reduce...
Collisions when generating UUIDs in JavaScript?
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35
My best guess is that Math.random() is broken on your system for some reason (bizarre as that s...
Simple basic explanation of a Distributed Hash Table (DHT)
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3 Answers
3
Active
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Error while installing json gem 'mkmf.rb can't find header files for ruby'
...ll ruby2.0-dev
sudo apt-get install ruby2.2-dev
sudo apt-get install ruby2.3-dev
or, generic way:
sudo apt-get install ruby-dev
or
sudo apt-get install ruby`ruby -e 'puts RUBY_VERSION[/\d+\.\d+/]'`-dev
The first link you’ve posted is exactly your case: there is no ruby development...
When to use os.name, sys.platform, or platform.system?
As far as I know, Python has 3 ways of finding out what operating system is running on:
5 Answers
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Python UTC datetime object's ISO format doesn't include Z (Zulu or Zero offset)
...etime.utcnow().replace(tzinfo=simple_utc()).isoformat()
'2014-05-16T22:51:53.015001+00:00'
Note that this DOES conform to the ISO 8601 format, which allows for either Z or +00:00 as the suffix for UTC. Note that the latter actually conforms to the standard better, with how time zones are represent...
Improve INSERT-per-second performance of SQLite
...#pragma_journal_mode
– OneWorld
Jan 31 '14 at 8:52
4
It's been a while, my suggestions applied fo...
Using helpers in model: how do I include helper dependencies?
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134
Just change the first line as follows :
include ActionView::Helpers
that will make it works....
How to install latest version of git on CentOS 7.x/6.x
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362
You can use WANDisco's CentOS repository to install Git 2.x: for CentOS 6, for CentOS 7
Inst...