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How do you extract a column from a multi-dimensional array?
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234
>>> import numpy as np
>>> A = np.array([[1,2,3,4],[5,6,7,8]])
>>> A...
How do I deep copy a DateTime object?
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174
$date1 = new DateTime();
$date2 = new DateTime();
$date2->add(new DateInterval('P3Y'));
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Logic to test that 3 of 4 are True
I want to return True if and only if 3 out of 4 boolean values are true.
27 Answers
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Need to understand the usage of SemaphoreSlim
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edited Feb 10 '17 at 3:34
LeopardSkinPillBoxHat
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Creating functions in a loop
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Alex MartelliAlex Martelli
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Why do we use arrays instead of other data structures?
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4 Answers
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What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?
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4 Answers
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Optimise PostgreSQL for fast testing
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edited May 23 '17 at 11:54
Community♦
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answered Feb 23 '12 at 5:57
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How to make a promise from setTimeout
...eout(() => {
l2.cancel();
}, 150);
Original Answer from 2014
Usually you'll have a promise library (one you write yourself, or one of the several out there). That library will usually have an object that you can create and later "resolve," and that object will have a "promise" you c...