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With bash, how can I pipe standard error into another process?
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mmlb
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answered Mar 27 '12 at 11:28
ScotScot
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Interactive search/replace regex in Vim?
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edited Feb 3 '19 at 23:15
Laurel
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What are the aspect ratios for all Android phone and tablet devices?
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║ 5 x 3 ║ 0.6 ║ 1.667... ║
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How can I represent an 'Enum' in Python?
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43 Answers
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Active
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What does the caret operator (^) in Python do?
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>>> 0^1
1
To explain one of your own examples:
>>> 8^3
11
Think about it this way:
1000 # 8 (binary)
0011 # 3 (binary)
---- # APPLY XOR ('vertically')
1011 # result = 11 (binary)
share
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Bootstrap 3 Navbar Collapse
Is there any way to increase the point at which the bootstrap 3 navbar collapses (i.e. so that it collapses into a drop down on portrait tablets)?
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Homebrew install specific version of formula?
...a, it puts it in a versioned directory like /usr/local/Cellar/postgresql/9.3.1. Only symbolic links to this folder are then installed globally. In principle, this makes it pretty easy to switch between two installed versions. (*)
If you have been using homebrew for longer and never removed older ve...
Map over object preserving keys
...ap the values and preserve the keys.
_.mapObject({ one: 1, two: 2, three: 3 }, function (v) { return v * 3; });
// => { one: 3, two: 6, three: 9 }
DEMO
With Lodash
Lodash provides a function _.mapValues to map the values and preserve the keys.
_.mapValues({ one: 1, two: 2, three: 3 }, fu...
Automatically expanding an R factor into a collection of 1/0 indicator variables for every factor le
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131
Use the model.matrix function:
model.matrix( ~ Species - 1, data=iris )
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What's the function like sum() but for multiplication? product()?
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Update:
In Python 3.8, the prod function was added to the math module. See: math.prod().
Older info: Python 3.7 and prior
The function you're looking for would be called prod() or product() but Python doesn't have that function. So, you need...