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matplotlib does not show my drawings although I call pyplot.show()
... in directory ~/.matplotlib/. In this case, the following code shows where it is:
>>> import matplotlib
>>> matplotlib.matplotlib_fname()
In [1]: import matplotlib.pyplot as p
In [2]: p.plot(range(20),range(20))
Out[2]: [<matplotlib.lines.Line2D object at 0xa64932c>]
I...
What's the difference between findAndModify and update in MongoDB?
I'm a little bit confused by the findAndModify method in MongoDB. What's the advantage of it over the update method? For me, it seems that it just returns the item first and then updates it. But why do I need to return the item first? I read the MongoDB: the definitive guide and it says that i...
Why do we need message brokers like RabbitMQ over a database like PostgreSQL?
I am new to message brokers like RabbitMQ which we can use to create tasks / message queues for a scheduling system like Celery .
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What does tree-ish mean in Git?
I'm very confused about how to use git archive .
6 Answers
6
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How are people managing authentication in Go? [closed]
...g like the following design:
create table User (
ID int primary key identity(1,1),
Username text,
FullName text,
PasswordHash text,
PasswordSalt text,
IsDisabled bool
)
create table UserSession (
SessionKey text primary key,
UserID int not null, -- Could have a hard "references User"
Logi...
How to shuffle a std::vector?
...reusable way to shuffle a std::vector in C++. This is how I currently do it, but I think it's not very efficient because it needs an intermediate array and it needs to know the item type (DeckCard in this example):
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HTML code for an apostrophe
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If you are looking for single quote, it is
&#39;
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What is a vertical tab?
...speed up printer vertical movement. Some printers used special tab belts with various tab spots. This helped align content on forms. VT to header space, fill in header, VT to body area, fill in lines, VT to form footer. Generally it was coded in the program as a character constant. From the keyb...
Regex: Remove lines containing “help”, etc
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This is also possible with Notepad++:
Go to the search menu, Ctrl + F, and open the Mark tab.
Check Bookmark line (if there is no Mark tab update to the current version).
Enter your search term and click Mark All
All lines containing the search...
Parsing CSV files in C#, with header
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Let a library handle all the nitty-gritty details for you! :-)
Check out FileHelpers and stay DRY - Don't Repeat Yourself - no need to re-invent the wheel a gazillionth time....
You basically just need to define that shape of your data - the fields in y...