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(![]+[])[+[]]… Explain why this works
... @rlemon, there's no int data type on the language, in fact all numbers are double-precision 64-bit format (IEEE 754 values), even though some operators work internally with Integer values (like the bitwise operators) the result is always a double. The 'i' comes in this example from u...
Numpy - add row to array
...2, 0]])
X = array([[0, 1, 2], [1, 2, 0], [2, 1, 2], [3, 2, 0]])
add to A all rows from X where the first element < 3:
import numpy as np
A = np.vstack((A, X[X[:,0] < 3]))
# returns:
array([[0, 1, 2],
[0, 2, 0],
[0, 1, 2],
[1, 2, 0],
[2, 1, 2]])
...
What is Eclipse's Ctrl+O (Show Outline) shortcut equivalent in IntelliJ IDEA?
...
I haven't used Eclipse for years, so I'm not that familiar with the behaviour you're after - but I believe Ctrl + F12 may do what you want: it is the shortcut for the File structure Popup in the default mapping.
...
ValueError: setting an array element with a sequence
...9 when building an array of objects (not necessarily lists) that implement __getitem__ as specified here:github.com/numpy/numpy/issues/5100
– dashesy
Nov 21 '14 at 19:13
add a...
Vim: apply settings on files in directory
How do I specify Vim settings for all files under the current directory?
11 Answers
11...
Why do we need fibers
...Ruby class in Ruby 1.9. These are incredibly useful.
In Ruby 1.9, if you call almost any iterator method on the core classes, without passing a block, it will return an Enumerator.
irb(main):001:0> [1,2,3].reverse_each
=> #<Enumerator: [1, 2, 3]:reverse_each>
irb(main):002:0> "abc"....
Is 'switch' faster than 'if'?
Is a switch statement actually faster than an if statement?
12 Answers
12
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Measuring elapsed time with the Time module
...
start_time = time.time()
# your code
elapsed_time = time.time() - start_time
You can also write simple decorator to simplify measurement of execution time of various functions:
import time
from functools import wraps
PROF_DATA...
git: How do I get the latest version of my code?
...it clean -xffd
git pull
Again, this will nuke any changes you've made locally so use carefully. Think about rm -Rf when doing this.
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Converting datetime.date to UTC timestamp in Python
...le (e.g., via tzlocal.get_localzone()) to get access to the tz database on all platforms. Also, utcfromtimestamp() may fail and mktime() may return non-POSIX timestamp if "right" timezone is used.
To convert datetime.date object that represents date in UTC without calendar.timegm():
DAY = 24*60*...