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Why is it slower to iterate over a small string than a small list?
...hon2 -m timeit '[x for x in ["a", "b", "c"]]'
1000000 loops, best of 3: 0.212 usec per loop
Let's explain the difference between the versions. I'll examine the compiled code.
For Python 3:
import dis
def list_iterate():
[item for item in ["a", "b", "c"]]
dis.dis(list_iterate)
#>>>...
How to make an array of arrays in Java
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Jon SkeetJon Skeet
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What it the significance of the Javascript constructor property?
...nstructor relationship
– Raynos
Apr 12 '12 at 21:14
@Raynos: Not the safest assumption, but probably safer than it use...
How can I do an asc and desc sort using underscore.js?
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answered Aug 12 '13 at 18:28
jEremyBjEremyB
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How can I implement a tree in Python?
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edited Jun 20 at 9:12
Community♦
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answered Sep 2 '16 at 12:52
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How do you log all events fired by an element in jQuery?
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How to document class attributes in Python? [closed]
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edited Jun 20 at 9:12
Community♦
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answered Mar 4 '12 at 20:52
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How do I read any request header in PHP
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answered Feb 12 '09 at 14:25
JaccoJacco
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How to convert JSON data into a Python object
...ace
data = '{"name": "John Smith", "hometown": {"name": "New York", "id": 123}}'
# Parse JSON into an object with attributes corresponding to dict keys.
x = json.loads(data, object_hook=lambda d: SimpleNamespace(**d))
print(x.name, x.hometown.name, x.hometown.id)
OLD ANSWER (Python2)
In Python2, ...
How do I calculate the date in JavaScript three months prior to today?
...works for January. Run this snippet:
var d = new Date("January 14, 2012");
console.log(d.toLocaleDateString());
d.setMonth(d.getMonth() - 3);
console.log(d.toLocaleDateString());
There are some caveats...
A month is a curious thing. How do you define 1 month? 30 days? Most peop...