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How to make an immutable object in Python?

Although I have never needed this, it just struck me that making an immutable object in Python could be slightly tricky. You can't just override __setattr__ , because then you can't even set attributes in the __init__ . Subclassing a tuple is a trick that works: ...
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How to check if an element is in an array

In Swift, how can I check if an element exists in an array? Xcode does not have any suggestions for contain , include , or has , and a quick search through the book turned up nothing. Any idea how to check for this? I know that there is a method find that returns the index number, but is there ...
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'const string' vs. 'static readonly string' in C#

In C#, what's the difference between 5 Answers 5 ...
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How to put comments in Django templates

I would like to comment this with a line 6 Answers 6 ...
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Write to .txt file?

How can I write a little piece of text into a .txt file? I've been Googling for over 3-4 hours, but can't find out how to do it. ...
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chart.js load totally new data

The API for chart.js allows one to edit points of the datasets loaded into it, for example: 19 Answers ...
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How to go up a level in the src path of a URL in HTML?

I am storing style sheets in {root}/styles while images in {root}/images for a website. How do I give the path in the style sheets to go look in the images directory for the specified images? ...
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How do I comment on the Windows command line?

In Bash, # is used to comment the following. How do I make a comment on the Windows command line? 7 Answers ...
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Plotting a list of (x, y) coordinates in python matplotlib

I have a list of pairs (a, b) that I would like to plot with matplotlib in python as actual x-y coordinates. Currently, it is making two plots, where the index of the list gives the x-coordinate, and the first plot's y values are the a s in the pairs and the second plot's y values are the b s ...
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git log of a single revision

I have a commit c. I want to get the changeset of that exact commit c + metainformation and no other one. Is there a simpler way than git log -p c^..c to do that? ...