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'str' object does not support item assignment in Python
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edited Oct 19 '13 at 11:48
answered May 17 '12 at 7:19
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Rails has_and_belongs_to_many migration
...First run your migrations, then edit the generated migration file.
Rails 3
rails g migration create_restaurants_users_table
Rails 4:
rails g migration create_restaurants_users
Rails 5
rails g migration CreateJoinTableRestaurantUser restaurants users
From the docs:
There is also a gene...
How do you manually execute SQL commands in Ruby On Rails using NuoDB
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edited Jan 23 '19 at 10:24
Jan Klimo
3,42911 gold badge2727 silver badges3737 bronze badges
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form_for but to post to a different action
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answered Mar 16 '11 at 2:43
AustinAustin
3,79233 gold badges2020 silver badges2525 bronze badges
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How do you get the magnitude of a vector in Numpy?
...ray -- say x.norm() -- but oh well).
import numpy as np
x = np.array([1,2,3,4,5])
np.linalg.norm(x)
You can also feed in an optional ord for the nth order norm you want. Say you wanted the 1-norm:
np.linalg.norm(x,ord=1)
And so on.
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What is Microsoft.csharp.dll in .NET 4.0
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edited Mar 13 '12 at 8:26
Matthew Lock
10.6k1010 gold badges8080 silver badges119119 bronze badges
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Java: PrintStream to String?
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193
Use a ByteArrayOutputStream as a buffer:
import java.io.ByteArrayOutputStream;
import java.io.P...
How to change plot background color?
...uple of float values in [0, 1] (e.g., (0.1, 0.2, 0.5) or (0.1, 0.2, 0.5, 0.3));
a hex RGB or RGBA string (e.g., '#0F0F0F' or '#0F0F0F0F');
a string representation of a float value in [0, 1] inclusive for gray level (e.g., '0.5');
one of {'b', 'g', 'r', 'c', 'm', 'y', 'k', 'w'};
a X11/CSS4 co...