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Cannot change column used in a foreign key constraint
....mysql.com/doc/refman/5.5/en/lock-tables.html
EDIT 2: OP asked for a more detailed explanation of the line "The type and definition of foreign key field and reference must be equal. This means your foreign key disallows changing the type of your field."
From MySQL 5.5 Reference Manual: FOREIGN KEY...
Matplotlib (pyplot) savefig outputs blank image
...
let's me give a more detail example:
import numpy as np
import matplotlib.pyplot as plt
def draw_result(lst_iter, lst_loss, lst_acc, title):
plt.plot(lst_iter, lst_loss, '-b', label='loss')
plt.plot(lst_iter, lst_acc, '-r', label='accu...
What is a clearfix?
...ri 6.1 (including Mobile Safari) and Android's default browser 4.4.
For a detailed browser list see: https://caniuse.com/flexbox.
(Perhaps once its position is established completely, it may be the absolutely recommended way of laying out elements.)
A clearfix is a way for an element to automat...
Binding a WPF ComboBox to a custom list
... - SelectedItem, SelectedValue, and SelectedValuePath with NHibernate, for details.
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How to make graphics with transparent background in R using ggplot2?
... need to pass dev.args = list(bg = 'transparent') as a chunk option. More detail here stackoverflow.com/a/13826154/561698
– Andrew
Apr 24 '14 at 19:50
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how can I see what ports mongo is listening on from mongo shell?
...ctive, port 28017 (27017+1000) will also be open handling web requests for details.
MongoDB supports a getParameter command, but that only works if you're already connected to the Database (at which point you already know the port).
...
What is the “realm” in basic authentication
...y the authentication schemes to indicate a scope of protection.
For more details, see the quote below (the highlights are not present in the RFC):
2.2. Protection Space (Realm)
The "realm" authentication parameter is reserved for use by
authentication schemes that wish to indicate a ...
Why Collections.sort uses merge sort instead of quicksort?
...nd beats n log n only on nearly sorted lists.
Timsort is described in detail here:
http://svn.python.org/projects/python/trunk/Objects/listsort.txt.
Tim Peters's original implementation is written in C. Joshua Bloch
ported it from C to Java and end tested, benchmarked, and tuned the
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Guava: Why is there no Lists.filter() function?
...hy part, you can visit https://github.com/google/guava/issues/505 for more details.
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backbone.js & underscore.js CDN recommendation?
...cdnjs. Check out some more cdnjs stats and users: w3techs.com/technologies/details/cd-cdnjs/all/all
– Ryan Kirkman
May 8 '13 at 5:10
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