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p vs puts in Ruby
...> 42
p t => #<T:0xb7ecc8b0 @i=42>
This follows directly from the .inspect call, but is not obvious in practice.
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PostgreSQL error: Fatal: role “username” does not exist
... owning_user (in this case, h9uest). After that you can run rake db:create from the terminal under whatever account name you set up without having to enter into the Postgres environment.
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Neither BindingResult nor plain target object for bean name available as request attribute [duplicat
... can map with the new ModelObject create. If yes Spring will inject values from request parameters to your custom model object class (Login in this case).
You can test this by doing
@RequestMapping(value = "/login", method = RequestMethod.GET)
public String displayLogin(Login loginModel, Model m...
in Ipython notebook / Jupyter, Pandas is not displaying the graph I try to plot
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Note that --pylab is deprecated and has been removed from newer builds of IPython, The recommended way to enable inline plotting in the IPython Notebook is now to run:
%matplotlib inline
import matplotlib.pyplot as plt
See this post from the ipython-dev mailing list for mor...
Django filter versus get for single object?
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You can install a module called django-annoying and then do this:
from annoying.functions import get_object_or_None
obj = get_object_or_None(MyModel, id=1)
if not obj:
#omg the object was not found do some error stuff
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Convert a list to a data frame
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This method suffers from the null situation.
– Frank Wang
May 9 '12 at 9:38
3
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C# pattern to prevent an event handler hooked twice [duplicate]
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Calls to Invoke() will have to be switched from the public event to the private delegate, e.g. Foo?.Invoke() would now become foo?.Invoke(). Otherwise you get an error.
– toddmo
Oct 19 '17 at 16:19
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Adding a y-axis label to secondary y-axis in matplotlib
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How to get the right y axis like the left one, I mean, from bottom to top, from 0 to 5, aligned.
– Sigur
Mar 22 '18 at 1:43
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Globally override key binding in Emacs
...actly what you asked for, I will mention for posterity another solution.
From The Emacs Manual:
"Don't define C-c letter as a key in Lisp programs. Sequences consisting of C-c and a letter (either upper or lower case) are reserved for users; they are the only sequences reserved for users, so d...
json_encode/json_decode - returns stdClass instead of Array in PHP
...","newspaper","sand paper","monitor","tree"]}
The JSON format was derived from the same standard as JavaScript (ECMAScript Programming Language Standard) and if you would look at the format it looks like JavaScript. It is a JSON object ({} = object) having a property "stuff" with value "things" and...