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How do I sort an array of hashes by a value in the hash?
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216
Ruby's sort doesn't sort in-place. (Do you have a Python background, perhaps?)
Ruby has sort! ...
Backporting Python 3 open(encoding=“utf-8”) to Python 2
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1. To get an encoding parameter in Python 2:
If you only need to support Python 2.6 and 2.7 you can use io.open instead of open. io is the new io subsystem for Python 3, and it exists in Python 2,6 ans 2.7 as well. Please be aware that in Python 2.6 (as well as 3.0) ...
Updating MySQL primary key
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235
Next time, use a single "alter table" statement to update the primary key.
alter table xx dro...
How to compare two dates?
...t; datetime(3000, 1, 1) < present
False
>>> present - datetime(2000, 4, 4)
datetime.timedelta(4242, 75703, 762105)
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Get loop count inside a Python FOR loop
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edited Jun 21 '18 at 5:09
answered Jul 1 '10 at 23:02
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Python try…except comma vs 'as' in except
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288
The definitive document is PEP-3110: Catching Exceptions
Summary:
In Python 3.x, using as i...
SQL Server CTE and recursion example
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210
I haven't tested your code, just tried to help you understand how it operates in comment;
WIT...
How do you know when to use fold-left and when to use fold-right?
...re, you use a left fold. Example (haskell-style pseudocode)
foldl (-) [1, 2, 3] == (1 - 2) - 3 == 1 - 2 - 3 // - is left-associative
If your operator is right-associative (right fold), the parentheses would be set like this:
A x (B x (C x D))
Example: Cons-Operator
foldr (:) [] [1, 2, 3] == 1...
What to do about Eclipse's “No repository found containing: …” error messages?
...'s Helios EE bundle on Linux to which I added the subversive plugins, the m2e Maven integration and the Mylin connector for Trac. For the last couple of weeks I've been trying to install updates, and every time I get back a message like
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