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OSError: [Errno 2] No such file or directory while using python subprocess in Django
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edited Sep 23 '13 at 15:16
answered Sep 23 '13 at 15:11
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fork() branches more than expected?
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245
The fork() primitive often stretches the imagination. Until you get a feel for it, you should...
Drawing Isometric game worlds
What is the correct way to draw isometric tiles in a 2D game?
6 Answers
6
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bool operator ++ and --
... the integral value is anything else - notably this includes 0 [false] and 2 or more [true]).
So as a short-hand ++ worked, and -- didn't.
++ is allowed on bools for compatibility with this, but its use is deprecated in the standard and it was removed in C++17.
This assumes that I only use x as an ...
Active Record - Find records which were created_at before today
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Using ActiveRecord the standard way:
MyModel.where("created_at < ?", 2.days.ago)
Using the underlying Arel interface:
MyModel.where(MyModel.arel_table[:created_at].lt(2.days.ago))
Using a thin layer over Arel:
MyModel.where(MyModel[:created_at] < 2.days.ago)
Using squeel:
MyModel.w...
How do i put a border on my grid in WPF?
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215
If you just want an outer border, the easiest way is to put it in a Border control:
<Borde...
Python Dictionary to URL Parameters
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256
Use urllib.urlencode(). It takes a dictionary of key-value pairs, and converts it into a form ...
Plot a bar using matplotlib using a dictionary
...ng the appropriate ticks:
import matplotlib.pyplot as plt
D = {u'Label1':26, u'Label2': 17, u'Label3':30}
plt.bar(range(len(D)), list(D.values()), align='center')
plt.xticks(range(len(D)), list(D.keys()))
# # for python 2.x:
# plt.bar(range(len(D)), D.values(), align='center') # python 2.x
# plt...
powershell 2.0 try catch how to access the exception
This is the try catch in PowerShell 2.0
1 Answer
1
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Group by with multiple columns using lambda
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258
var query = source.GroupBy(x => new { x.Column1, x.Column2 });
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